neutra separating plants - separator systems for light ... · all neutra separating plants are...

Neutra separating plantsSeparator systems for light liquids (EN 858)

Pump and plant engineering

Separating plants Wastewater treatment plantsRenewable energy

sourcesRainwater

management

2 / Neutra separating plants

Water protection with Neutra separating plants

Mall GmbH manufactures the Neutra brand of waste water treatment systems. These plants sep-arate mineral light liquids or organic fats from the wastewater, treat washing water for feeding into the circulation systems of vehicle washing plants or are plants for handling substances hazardous to water on WHG / LAU surfaces.

The Mall systems are made of high-quality and durable reinforced concrete. The reinforced con-crete tanks from Mall are subject to the stringent requirements of the new generation of DIN EN 206 and EC 2 (DIN EN 1992-1-1) standards and thus exhibit no quality fluctuations.

With over six decades of experience and their comprehensive range of products, the Mall group has developed into one of the most important specialist companies having the process technolo-gy know-how for rainwater management, separating plants and wastewater treatment plants.

The DIN EN 858 Part 1 and Part 2 and DIN 1999-100/-101 standards apply to the light liquid separators. In addition to the specifications from the applicable standards, rules and certification procedures, the quality of the products is also ensured through certification with the RAL-GZ 693 RAL quality certificate.

Neutra separating plants / 3

Table of contents

Separating plants Page

Water protection with Neutra separating plants 2

Legal basis 4

Principle guidelines for mineral light liquid separators 6

Coatings and cladding 7

Security against the escape of light liquid 8

Products 9 – 19

NeutraSed sludge trap 9

NeutraPlus oil separator 9

NeutraStar coalescence separator 10

NeutraCom coalescence separator 12

NeutraPro oil and coalescence separator 14

NeutraCheck sample-removal manhole 16

NeutraStop OASA warning and monitoring system 17

NeutraClear circulation water treatment system 18


Legal basis

Appendix 49 "wastewater containing mineral oils" of the German water resources law 2004is decisive for separating plants. This regulates the handling of wastewater containing mineral oils from production processes that regularly produce wastewater polluted with mineral oils resulting from the maintenance, repair, preservative re-moval, cleaning and recycling of vehicles. This is especially the case in commercial, industrial and public works sites.In addition, the new AwSV now regulates the handling of liquid hazardous substances Germa-ny-wide in a unified manner for the first time. This directive on technical rules is implemented especially for petrol stations and transfer points in TRwS 781. The diversion of rainwater and the required retention facilities are defined here.

Wastewater pre-treatment plants are a part of the property drainage system. These are usually based on mechanical processes in which e.g. the density difference between the polluting load and water are used for cleaning the wastewater. These can be pollutants having a higher density than water (sedimentation materials) or a lower density than water (light liquids).

Waste water treatment plants for polluting loads containing mineral oils are subject to water regu-lations approval according to the regional building regulations. This is not necessary when using a plant having general technical approval from the German Institute for Civil Engineering (DIBt). All Mall separating plants have general technical approval certificates. Unless otherwise specified by the local sewage system operator, a limit value of 20 mg/l for mineral oil hydrocarbons at the point of origin is usually required. These limit values are considered adhered to when using separating plants with general technical ap-proval that are correctly planned and operated.

If direct discharge into the outlet channel is planned, then the plant requires water legislation permission from the local water authorities. This is possible according to the stipulations of the respective general technical approval through ad-ditional measures when operating the plant.

Mall is a technical specialist according to the WHG. Product certification according to kiwA guidelines.

Rainwater or waste water that is contaminated by mineral light liquids, e.g. produced through maintenance, refuelling or cleaning of vehicles, must not be discharged into the environment with-out prior treatment. The dimensions of a separating plant are based on the DIN EN 858-2 and DIN 1999-100/-101 standards, as listed below.


Certification system

Separating plants(mineral oil separators)

Retention and separation facilities

Washing water treatment systems

CE marking n n n

argus CERT BAUMonitoring by an external body

n n n

General technical approval (DIBt)

n n n

RAL quality certificate 693 n n n

Standards and legislationThe German water resources law (Wasser-haushaltsgesetz, WHG) and associated wastewater ordinance regulate the scope of possible actions in the handling of water. The technical implementation is defined by the applicable standards and technical rules and regu-lations. The decisive technical rules and regulations for wastewater containing mineral oils and sub-stances hazardous to water are:n Directive (EU) 305/2011 on the marketing

of construction productsn DIN EN 858-1: Separator systems for light

liquids (e.g. oil and petrol) - Part 1: Principles of product design, performance and testing, marking and quality control; German version EN 858-1:2002 + A1:2004

n DIN EN 858-2: Separator systems for light liquids (e.g. oil and petrol) - Part 2: Selection of nominal size, installation, operation and maintenance; German version EN 858-2:2003

n DIN 1999-100: Installations for separation of light liquids - Part 100: Application provisions for installations for separation of light liquids in accordance with DIN EN 858-1 and DIN EN 858-2

n DIN 1999-101: Separating plants for light liquids - Part 101: Additional requirements on installations for separation in accordance with DIN EN 858-1, DIN EN 858-2 and DIN 1999-100 for light liquids with parts of biodiesel fuel and fatty acid methyl esters (FAME) respectively

n DIN 19901: Installations for separation for light liquids and greases - Verification of structural stability and steadiness

In addition to guaranteeing the process function-ality of the plant, the use of the German residual standards also guarantees the structural stability, impermeability against light liquids and safe oper-ation of the plants.

Austria: ÖNORM B 5101 Separator systems for light liquids (e.g. oil and petrol) – Supplementary requirements to the ÖNORMs EN 858-1 and -2

Basic approval criteria of the German Institute of Construction Engineering (DIBt)Plants with general technical approval are sub-jected to additional test criteria and more stringent functional requirements.

RAL quality control association Certifies manufacturers that have the criteria tested by an independent institute.

GET quality characteristics n External monitoring of production processesn Stability certificates n Quality characteristics as defined by quality

guidelines n Regular update of the technical

level of the productn External monitoring of the type approval and

national approvalsn Internal and external production monitoring n Tested type structure SLW 60n Mall separating plants are distinguished

with the RAL quality certificate 693.

Advantages of the GET guidelines

+ Specification of additional quality criteria beyond the standard for drainage technology products

+ GET guidelines close gaps created by European harmonisation

+ Consumers have the opportunity to describe the required quality stand-ards precisely by referring to the GET guidelines

+ Monitoring certificates document ongoing conformance to these increased requirements


Principle guidelinesMineral light liquid separators

Light liquid separators have two main tasks: The separation of light liquids from water and the retention of already separated light liquids. The manufacturer requirements on the separation of light liquids and water are defined in the standards through testing of the outlet water values. The standards specify the retention requirements based on the local conditions.

Principle guidelines usually apply to a

single functional component such as e.g.

a coalescence separator.

Approval is awarded for a single compo-

nent or for an entire separating plant. A

plant consists of a sludge trap, a separator

and a sampling system.

type testing by an independent institute. We are happy to provide the results of these tests to our customers.

n Structural stability verification Underground structures are subjected to nu-merous external structural loads. The stability against these loads is documented in a type structure. Additional on-site measures, such as on-site concrete slabs, cladding etc. are not required.

n Fire prevention The inlet and outlet lines of separating plants must be made of non-combustible materials. The tanks are made of reinforced concrete and thus satisfy the technical fire prevention require-ments.

n Leak tightness Not only the leak tightness against penetrating and escaping water is important for separating plants. The impenetrability of the walls against

The principle guidelines for separating systems are cited in the EN 858-1 and DIN 1999-100 standards and contain the following main points:n Type testing

Adherence to the principle guidelines en-sures safe installation, operating and main-tenance of the separating plant. All Neutra separating plants are therefore subjected to

TanksThe tanks used as components of a separating plant are monolithic reinforced concrete tanks. The tested type structure is designed for a crack width restriction < 0,2 mm. Penetration of light liquid into the concrete is prevented by an inner coating or an inliner.

Sludge trapA sludge trap sediments settling solids. This is necessary especially for large amounts of sludge produced. An effective sludge trap is of great importance for the subsequent treat-ment. The design of the sludge trap depends on the nominal size of the separating plant and the sludge quantity produced.

Class II oil separatorA class II oil separator must exhibit a maxi-

mum discharge value of 100 mg/l hydrocarbons under test conditions. All principle guidelines are tested and certified as with the coalescence sepa-rating plant.

Class I coalescence separatorFor the class I coalescence separator, numerous principle guidelines and functional requirements are tested and certified both during the initial inspection of the product and in recurring pro-duction monitoring and certification steps. One of the requirements of the class I separating plant is the discharge value with a maximum of 5 mg/l of mineral hydrocarbons under prescribed test conditions. In effect, a class I separating plant has even greater purification capabilities than a class II separating plant.

Sampling manholeAll separating plant systems feature a sampling

manhole that allows sampling of the dis-charged wastewater flow. To ensure this, the sampling manhole is subject to strict geomet-rical requirements as per DIN 1999-100. There are integrated sampling manholes in separat-ing plants or downstream sampling shafts.

Warning deviceAccording to DIN EN 858-1, separating plants must always be equipped with automatic warning devices.

DIN EN 858-1 and DIN 1999-100

Components of a separating plant

light liquids must also be ensured. In Neutra separating plants this is ensured through a light liquid impermeable coating or a PE-HD cladding.


Coatings and cladding

Concrete subjected to "very strong" chemical attack for long periods of time must not only have a composition appropriate for this "strong" attack but must also be additionally protected against the immediate ingress of the attacking substances.

Easy to use, solvent-free and environmental-ly-friendly epoxy resin combinations provide a chemically-resistant inner coating. This is subjected to a chemical test according to DIN EN 858-1 "Chemical resistance test of the inner surfaces of the tank, coatings and claddings".

Polluted and aggressive groundwater, floor water, operating water and wastewater or exhaust gases chemically affect and attack the hardened concrete. The necessary degree of concrete protection is assessed according to DIN 4030. Consultation with a technical expert is essential for this.

The advantages at a glance

+ Bridges cracks in concrete

+ Wax-like, smooth surface

+ Highly impact-resistant and abrasion-resistant

+ Mechanically robust

+ Resilience against high and low tempera-tures and abrupt temperature changes

+ Can be repeatedly repaired

PE concrete protection plate for special anti-corrosion applications Mall offers an optional model with an HDPE inner lining for special anti-corrosion requirements made necessary by waste water inside containers. The reinforced concrete separating plants can thus be lined with PE concrete protection plates in the factory. The high level of mechanical stress is combined with improved resilience against waste-water with varying temperatures.One side of the plastic plates features a certain number of conical anchor nubs that provide a permanent bond with the concrete. Stress caused by various instances of heat expansion of concrete and plastic is suppressed by this force-locked connection.

The combination of concrete and plastic has prov-en to be a highly acid-proof lining under the tough-est conditions around the world for over 30 years. Hydraulically smooth, non-porous surfaces prevent encrustation and support the self-cleaning pro-cess, allowing the system to be low-maintenance and therefore highly economical in the long term.

Advantages of a composite material con-sisting of reinforced concrete with a coat-ing or HDPE inner claddingn All structural tasks are performed by con-

crete and steel.n The coating can concentrate on the tasks of

protecting the concrete and repelling water and grease.


The installation situation must be selected in a manner ensuring that light liquid cannot escape from the separating plant. The shaft is to be constructed to be leakproof all the way to the shaft cover. The knowledge required for this can be obtained in technical training courses and from in-stallation instructions.

Mineral light liquids have a lower density than wa-ter. They therefore form a higher liquid level than in a communicating connected pipe filled with water. This is exactly the case in a separating plant. The inlet side contains only water and the separating plant contains both water and light liquid. If back-water now occurs in the separating plant then the light liquid is at a higher level than the water in the inlet. If the water level reaches the shaft superstructure then the cross-section becomes smaller, which increases the thickness of the light liquid layer. To ensure that light liquid cannot escape from the shaft superstructure, the shaft superstructure must be a certain dimension higher than the lowest point of the communicating pipes in which only water is present. This dimension is known as the camber. The camber for each respective plant must always be determined according to the actu-al object-specific shaft superstructure.

The reference level is the upper edge of the lowest floor drain for the polluted water intake and the highest possible backwater level of the area to be drained for the rainwater intake.

Supplementary to DIN 858-2, according to DIN 1999-100 the necessary camber with respect to the backwater level of the sewage system must also be maintained. In addition to the intake lev-el, the backwater level must also be taken into consideration as an additional dimension for the camber.

If the camber with respect to the backwater level cannot be maintained in individual cases then backwater protection must be installed down-stream from the separating plant as described below:n If the inflow to the separating plant can be reli-

ably interrupted and/or an adequate inflow-side camber is present then an anti-flooding valve as per DIN EN 13564-1, Type 2 is a permissible form of backwater prevention.

n If the inflow to the separating plant cannot be reliably interrupted then a double lifting system with a backflow loop must be installed.

It thus makes no difference whether the self-clos-ing mechanism is located at the inlet or the outlet. See also "NeutraStop warning system".

Use of warning systemsA warning system must be installed if the neces-sary camber for the separating plant cannot be maintained. The DIN EN 858-1 and DIN 1999-100 standards also stipulate that all separating plants must always be equipped with automatic warning systems. This must measure the thickness of the light fluid and the liquid level in the separating plant. An optical/acoustic warning device is an integral part of the automatic warning system. The liquid level monitoring system is to be installed so that an increased operating liquid level is reliably detected before overflow of the coalescence insert and also so that a backwater event is reliably detected.

Security against the escape of light liquid


NeutraSed sludge trapNeutraPlus oil separator Web code M5510

Web code M5540

NeutraSed:

NeutraPlus:

S NeutraSed sludge trapAccording to DIN EN 858 / DIN 1999-100-/101 for light liquid separators

A sludge trap is used for sedimentation of settling substances through density differences. The de-gree of efficiency of the sludge trap depends on the surface area, the flow rate, the flow path and the volume. 50% of the sludge trap volume (at a static water level) can be used for storing the sludge. When this level has been reached, the sludge must be emp-tied from the trap. After the wastewater has been cleaned from these substances, it flows into the separating plant. The inflowing liquid is calmed via a baffle plate and is then channelled into the tank with an optimised flow. The sedimentation process is also initiated. Sludge traps consist of monolithic shaft sections, in the same manner as separating plants. Plastic internal cladding can be used as an alternative to inner coating.

The plastic inliners are usually made of HDPE. The EN 858 and DIN 1999 standards specify sludge traps for class I and II separators.

Capacities: 650 – 30,000 l

Usen For all separating plants


+ Self-closing mechanism guided in a protective pipe that protects the float ball from damage

+ All installed components are made of high-quality stainless steel

+ The separated light liquids can be dis-posed of independently of the sludge trap

l l NeutraPlus NS 3-40, class II oil separatorOil separator in accordance with EN 858 and DIN 1999-100 with self-closing mechanism

NeutraPlus oil separator as a component of a separat-ing plant with upstream sludge trap and usually with a class I separator. Guidance of the float in a protective pipe increases the operational safety and the disposal interval, especially when large quantities of light liquids and sediment are expected.

Usen For heavy pollution and light liquids of differing

densitiesn Yard areasZ-54.2-446


NeutraStar coalescence separator

I NeutraStar NS 3-100 Class I separator with self-closing mechanism on the discharge side and low-maintenance and maintenance-friendly coalescence device.

Coalescence insert for optimised separationCoalescence is the confluence of smallest light liquid droplets to form larger drops. The coalescence device inside the separator en-courages this form of fine separation. It causes the (remaining) oils that need to be separated to rise to the water surface in the separator when reaching a certain drop size.

Usen Filling and transshipping areasn Military outdoor areasn Parking area drainagen Scrap metal yardsn Airfieldsn Road and parking area drainagen Transformer cup drainagen Washing areas

Also possesses the certificate according to ÖNORM B 5101 awarded by the Austrian Standards Institute.

+ Conforms to the principle guidelines contained in the EN 858 standard and the DIN 1999-100 and 1999-101 supplementary standards


+ The insert can be removed from the filled tank according to abZ for maintenance and own monitoring

+ Open-cell PU insert, easy to clean

+ The self-closing mechanism automatically and reliably closes the discharge when the maximum oil storage quantity is reached

+ Very effective coalescence stage

+ Good accessibility to the coalescence device

+ Suitable for Biodiesel

Web code M5551

Z-54.3-449


Installation example: Harbour areas

NeutraStarMilitary outdoor areas, training areas

Sludge trap NeutraSed 15.900 l

Coalescence separator NeutraStar NS 80

Sample-removal manholeNeutraCheck

DN 400

Web code M5551

Usen Airport n Harbour areasn Fuel storage facilities


NeutraCom coalescence separator

S l NeutraCom NS 3-20Class I coalescence separatorWith integrated sludge trap, self-closing mecha-nism and integrated sampling chamber (optional) in a single structure

NeutraCom combines the functionality of a sludge trap, coalescence separator and optional sampling chamber in a single container. The optimised flow system initially channels the polluted water into the sludge trap. Coarse particles and pollutants settle to the bottom here, whereas the light liquids rise to the surface. The sludge trap consists of two functional areas: the sludge collection chamber, in which the sepa-rated sludge is retained, and the sludge separation chamber that ensures the necessary retention period for sedimentation of the pollutants in the water. All installed components are made of high quality stainless steel and are thus resistant to the incum-bent pollutants. The coalescence module consists of a polypropylene weave that has a low tendency for contamination. This coalescence insert absorbs very little water and therefore has a very low weight.

Usen Automobile sales yardsn Automobile washing hallsn Petrol stationsn Open air washing areasn Fire brigade buildings, volunteer public servicesn Truck stopsn Rest areas



+ Low installation costs

+ Functional elements can be viewed from above, removed and reinstalled even when the plant is filled

+ Large oil storage capacity > 500 l

+ Suitable for TVO

+ Leak testing is possible without removing the inner components

+ Only one compact unit to be installed

+ The version with an integrated sampling chamber is very suitable for retrofitting in existing piping systems.

+ Compact and space-saving design

+ The height loss between inlet and outlet is only 20 mm (60 mm with integrated sampling system)



Web code M5554

Z-54.3-442


Installation example: Automobile sales yard

NeutraComPetrol stations

Web code M5554

Installation example: Petrol station

Coalescence separator NeutraCom NS 10-2500

Sample-removal manhole

Coalescence separator NeutraCom NS 3-650

Sample-removal manholeNeutraCheck


NeutraPro oil and coalescence separator

S l l l NeutraPro NS 3-30Class II and class I separatorWith integrated sludge trap and optional integrated sampling chamber

Combination of a sludge trap, a petrol separator tested to EN 858-1, class II, a coalescence separa-tor tested to EN 858-1, class I, and/or a sampling chamber in a single structure.

High oil storage capacityThe high oil storage capacity of 500 l to 1,691 l usually greatly exceeds the fuel retention capacity required for petrol stations and fuel filling stations.

Easy sampling and maintenanceThe clearly laid out structure and the easily acces-sible inner functional components allow the opera-tor to easily monitor and maintain the system. The self-closing mechanism mounted in a cage and the coalescence device protected by a stainless steel housing are visible from above and easy to remove and clean even when the system is full. The version with an integrated sampling chamber is very suitable for retrofitting in existing piping systems. The height loss between inlet and outlet is only 20 mm.

Usen Petrol stationsn Automobile/scrap recyclingn Company washing areasn Self-service washing areasn For heavy pollution with light liquids



+ Increased safety through a large oil storage capacity

+ Easily accessible functional elements, even when the system is filled

+ Space-saving and low-cost

+ The wear-free coalescence insert can easily be removed and reinstalled

+ Four functional elements in a single structure, fully tested and with building regulations approval



+ Fitted components are corrosion resistant and designed for long-term service

+ No increase in the nominal size due to the density factor when dimensioning

Web code M5556

Z-54.3-503


Installation example: Communal construction yard

NeutraProOpen-air washing area for commercial and communal vehicles

Petrol and coalescence separator NeutraPro NS 10-5000

Sample-removal manhole

NeutraCheck

Sedimentation trapNeutraCon 2.200 l

Web code M5556


NeutraCheck sample-removal manhole

P NeutraCheck sample-removal manholeA part of a separating plant according to EN 858 and DIN 1999-100. For removing representative wastewater samples from the flowing wastewater in accordance with the applicable standards.

NeutraCheck can be viewed from above and al-lows monitoring, maintenance and cleaning of the system during operation. The ventilated shaft coveralso ensures trouble-free operation of the waste-water duct. The sampling shaft can also be used for accessing the drainage piping.

Technical featuresTrough and berm, factory fitted seals for plastic pipes ensure a safe and reliable pipe connection. The carefully designed reservoir system from Mall ensures that permanent retention cannot occur in the pipes. Fall height of 160 mm for taking waste-water samples from flowing wastewater.

UseDownstream from every separating plant that is not equipped with an integrated sampling system.

Optionsn Manually operated slidern Bendsn Backflow gaten Hollow form with a 40 mm height difference

between inlet and outlet

Web code M5530


+ According to DIN 1999-100

+ Sampling from the flowing outlet waste-water

+ Sampling visible from above

+ Flexible pipe connection


Warning and monitoring systemNeutraStop System OASA

Warning device NeutraStop System OASAThe monitoring of separating plants is comfortable and reliable. Two independent operating conditions within the separating plant are measured elec-tronically and are reported before any malfunction occurs. The conductivity sensor responds when the oil layer has reached 80% of its maximum thick-ness. The level monitor records the level of liquid in the separating plant.

UseIn accordance with DIN standards EN 858 and DIN 1999-100, alarm systems have to be installed in all situations where local conditions make it impossible to install the separating plant with the required camber.

Technical information

Options and enhancementsn Extension package for monitoring

a 2nd separator systemn Emergency power supply with a

potential-free battery 12 V or 24 V OAXA expansion board

n Emergency power supply with NeutraStop OASA warning and monitoring device in-cluding oil on water sensor and level mon-itor, OAXA expansion board, rechargeable battery and switch cabinet, pre-assembled

n Handymat signalling device for forward-ing alarms and faults as SMSs to mobile phones, faxes, email or normal telephone messages

n PC interface with USB converter and soft-ware for evaluation and storage of the last 30 message records in the display unit, including the NeutraStop OASA warning and monitoring system

n Float unit with OAWA sensor for fluctuating liquid levels

n External flashing light with integrated sirenn WHG warning system with national techni-

cal approval

NeutraStop wall feed-through system (cable feed-through)Petrol-resistant and gas-tight system for feed-throughs in walls of reinforced concrete tanks, with sealing for empty DN 100 plastic conduit, incl. compression seals for sensor connection cable and equipotential bonding.

n Ignition protection type/Explosion group: [EEx ia] IIc

n EC examination certificate: TÜV 05 ATEX 2806

n Housing protection type: IP 54n Power supply:

230/115 VAC ± 10 %; 50 Hzn Data interface: SELV,

max. 60 V DCn AC relay outputs: ≤ 250 V, ≤ 4 A, cos 0.7

n Reminder function for own monitoring/maintenance work and inspections


+ Optional: Serial interface for data transfer/remote monitoring

+ Easy sensor connection through cable connectors

+ Suitable for Zone 0 according to the ATEX guideline

+ Integrated error memory for 30 data records with time and date

+ Standard device suitable for monitoring two separators

+ Compatible with all separating plants, including third-party plants

+ Requires only a two-core connection cable between the device and the separator

Web code M9002


The mechanical-biological cleaning processThe polluted washing water flows towards the pre-treatment tank. Heavier and floating materi-als are retained there. The pre-treated washing water flows further into the treatment tank. It flows through the support and filter material in the process. Microorganisms colonise the support material in a natural way. A biofilm is created that biologically decomposes the organic substances. A compressor injects air into the counterflow. This air supplies the biology with oxygen, dirt particles float upwards and are fed to the pre-treatment tank via the sludge extraction funnel. The treated washing water flows into the storage tank for service water and is available for further use.NeutraTub post-treatment tank can be optionally used in the C3000 and C4000 large-scale plants that are usually used for treating the washing wa-ter from a car wash. This forms a process unit in conjunction with the treatment tank.Plastic pipes in lamella cores enhance the settling effect, particularly for small particles and this in-creases the effective area of the tank. The inclina-tion of the lamellae ensures that the excess sludge

slides to the bottom of the tank. The sludge is thus separated via settling out of the treated circulation water.

Exceptional advantageThe washing water flows via gravity through the entire plant so that the cleaning process does not need to be controlled using pumps and valves. If an interruption (malfunction) occurs in the supply of washing water from the service water tank to the car wash system, washing operations can be easily continued using drinking water. The washing water continues to be treated, can be channelled into the sewage system and wash customers can continue to be reliably serviced.

Exceptional cost-effectivenessThe treatment tanks are pre-mounted in the facto-ry ready for connection, and only need to be tubed together on site, leading to a significant reduction in construction time. Due to the installation of the circulation water treatment system in the ground, the amount of space required in the equipment room for further equipment can be kept to a min-imum. The effort required for own monitoring and maintenance work is small because no operating materials need to be used. The operating costs of the circulation water treatment system are low and the amortisation period is accordingly shorter.

Additional savings possible through the use of rainwaterDue to the use of rainwater for rinsing the vehicles, or to offset evaporation and diversion losses, a high level of drinking water costs and fees for surface sealing can be saved.

Treatment of washing waterNeutraClear circulation water treatment system

Treatment of washing water not only eases the burden on the environment, but also helps to lower the operating costs significantly. The circulation water treatment system provided by Mall func-tions without chemical additives. The costs of drinking and wastewater are significantly reduced.

Supplemental water /e.g. drinking water

Flow chart, NeutraClear circulation water treatment system with above-ground storage tank for service water

Rinse water

Washing water

A

B

Side-channel compressor

with controller

Emergency overflow

Above-ground storage tank for service water

NeutraTwin pre-treatment tank

NeutraClear treatment tank

NeutraSam underground storage tank for service water

Channel outlet

WZ

LF

Circulation inlet

Underground installation

Use n Drive-through washing facilitiesn Washing facilities for commercial

vehiclesn Continuous washing facilities


System design and flow pathThe system consists of an optimised pre-treat-ment tank that retains settling and floating solids, a biological cleaning stage with carrier and filter material and counter-current aeration, and a reservoir for service water. The components are designed to match each other and are operated as a continuous system. The washing water flows under gravity through the whole system, ending with the discharge of the excess water into the sewage system. Evaporation and other water losses can be com-pensated using rainwater or fresh water.An aboveground service water tank with automatic fresh water refilling and conductivity regulation can be additionally installed.

Circulation water treatment system NeutraClear C1400 as a compact systemSince automobile sales yards increasingly possess their own car wash plants but wash only a few customer vehicles per day with these, the proven NeutraClear circulation water treatment system is now available as a compact plant that combines all three functional areas (pre-treatment, treatment and service water tank) in a single container.

UseFor washing customer vehicles in automobile sales yards (30 – 40 vehicles / day). The water is mechanically and biologically cleaned without additional chemicals and then returned back to the wash process.

Washing water treatment with NeutraClearIndividual planning, service and installation


+ General technical approval Z-83.4-6

+ No chemical additives necessary

+ No odour nuisance through blowing of oxygen into the treatment plant

+ Reduction of surfactants and phosphates

+ Reduction of COD and BOD

+ Functions in gravity pipes

+ Especially low-maintenance and reliable operation

+ Compatible with all wash facilities that use service water

+ No separating plant required

+ Only notifiable

+ Clear interface definition

+ Space savings through underground installation of the treatment plant

+ Reduction of hydrocarbons

Circulation water treatment systemNeutraClear

Separating plants Wastewater treatment plants Pump and plant engineeringRainwater

managementRenewable energy

sources

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www.mall.infoMall GmbHHüfinger Strasse 39-4578166 Donaueschingen, GermanyPhone +49 771 8005-0Fax +49 771 8005-100www.mall.info

Mall GmbHGrünweg 377716 Haslach i. K., GermanyPhone +49 7832 9757-0Fax +49 7832 9757-290

Mall GmbHIndustriestrasse 276275 Ettlingen, GermanyPhone +49 7243 5923-0Fax +49 7243 5923-500

Mall GmbHRosslauer Strasse 7006869 Coswig (Anhalt), GermanyPhone +49 34903 500-0Fax +49 34903 500-600

Mall GmbHOststrasse 748301 Nottuln, GermanyPhone +49 2502 22890-0Fax +49 2502 22890-800

Mall AGZürichstrasse 468303 Bassersdorf, SwitzerlandPhone +41 43 266 13 00Fax +41 43 266 13 01www.mall.ch

Mall GmbH AustriaBahnhofstrasse 114481 Asten, AustriaPhone +43 7224 22372-0Fax +43 7224 22372-400www.mall-umweltsysteme.at

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