compact water treatment

8/14/2019 Compact Water Treatment

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Compact Water Treatment Plants

Water Turbidity>100


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At glance:

The Water Turbidity>100-treatment plant is:

A compact unit No structure is needed Easy to operate Low operational cost The plant treating and purifying water for drinking purposes Source of row water can be river water or borehole water The plant does not treat salty water The plant can treat 15 M3 of water per hour equal to 360 M3 in 24 Hours


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The Company CompactWater Package Treatment Plants are designed to supply high quality and safe water for small andmedium communities.

The Company compact and modular concept ensures to meet water quality requirements and potable water production.(According to the water specifications).

The Company Compact Water Package Treatment Plant is completely factory built and delivered in steel shell package

(containers), convenient for transportation and requiring minimal onsite assembly and installation work. Thisprefabricatedconstruction and ODIS manufacturing capacity offer a speedy delivery and installation of plants with different capacitiesand lot of varieties for flocculation, filtration and disinfections.

The Company package plant is based on standard and customized improved design criteria. Cost saving technology,simplicity and reliability of performances are its main characteristics.

The Company integrates conventional physico-chemical treatment of the raw water by coagulation-flocculation, solidsremoval by settling, filtration and disinfecting.

The Company is able to treat water with a variable and broad range of suspended solids and turbidity. Technologicaladvances are utilized both in clarifier and filtration units and low detention times and high efficiencies are obtained.

The Company produces safe, quality water having an effluent quality assurance that meets international and local drinkingwater standards.

The Company Compact Water Package Treatment Plants are fully automatic and all operating modes controlled byProgrammable Logic Controller (PLC).


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Compact Water Treatment Plants

The Company series is produced by factory in respect with the rules of ISO. The plants are based on chemical treatment,settling, filtration and disinfections. The systems are delivered in steel shell package (containers) and are ready for on-siteinstallation.

The installation required:

Connection of power (electrical energy supply); Connection of piping system (for raw water supply, for filtered water distribution and for drainage); Placement of the filter media.

The plants ensure a reliable approach for standard processes and customized needs. The typical flow configurationconsists of coarse solids separation, chemical addition, prior to clarification, enhanced clarification in DECA(developed in Israel) and fines filtration of the water in deep bed multi media filters. The filtered water is disinfectedusing Hypochlorite solution. Provision for the feed of special chemical may be ordered.

Raw water:

Source water surface water approved by local rules for drinking water.

Raw water quality - water with high turbidity from surface sources like rivers, lakes etc., free from heavy metals ortoxic substances.

Guaranteed quality of the treated water:

Turbidity - less than 1 NTU (in compliance with WHO drinking water standards). Residual chlorineconcentration - 0.2 PPM.

Hours of operation: Up to 24 h/day

Chemicals according to FDA regulations for drinking water.


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Disinfections Hypochlorite solution

Modularity The treatment plants are modular and easy expandable.

Installation The treatment plants are packed in steel shell containers, which allow convenient transportation,simple on-site installation, and mobility.

Operation Reliable functioning and low operating cost.


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System Description

Primary Separation: takes place in cyclonic separators (hydrocyclones) of 5000 series and a clarifier/flocculator tanks.The sand and coarse solids separated by hydrocyclones are drained through an automatic valve.

Coagulation: Coagulant is injected ahead of the cyclonic separator in order to destabilize the colloidal particles insuspension and to bring about agglomeration.

Clarification (Coagulation and Settling): takes place in the DECA Clarifier. The purpose of the DECA clarifier is toseparate the heavy loads of suspended solids and colloidal matter from the raw water. In this unit the sludge isseparated from the clarified water in a settling zone then recycled to a mixing zone. Coagulation is injected to bringabout bridging between the particles and to further improve the separation. The effluent from the DECA Clarifier ispumped through a booster pump to the filtration stage.

Multimedia Depth Filtration:performed by an array of multimedia filters with high depth media bed for final effluentpolish at relatively low filtration rate. Effluent water quality less than 1 NTU.

Disinfection: injects Hypochlorite to remove all pathogenic microorganisms from the treated water. The disinfecting

unit is fully automatic and controlled by residual chlorine controller.

Automation and Control: the systems are equipped with PLC (Programmable Logic Controller), which supervises theentire automatic functioning of the separation and filtration process. The systems backwash automatically by OP or whena preset time interval elapses.


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Main Elements of the System

Self-Cleaning Suction Strainer (optional)

The Company self-cleaning suction strainer is designed to protect thepump clogging by debris, trash and solids dirt. It is connected to thepump inlet and submerged in the water source (river, lake, reservoiretc.).

All the pumped water flows through the strainer and the debris are stopped on the screen,protecting the pump from clogging or getting damages by the debris resulting in increased pumpefficiency and reducing maintenance costs.

The screen is kept clean by the continuously rotating jets (using pump pressure through the returnline) blowing away the debris from the screen.


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Hydro cyclone Separator

The ODIS Hydro cyclone separator is a simple device, easy to operateand maintain. It has no moving parts or screens. The hydro cycloneseparates sand and other solids matter with very little head loss and90% or better efficiency no head loss build up and no clogging bysolids being separated.

The Hydro cyclone use tangential injection flow process, enhancingthe centrifugal forces and moving solid particles outwards. Thedispersed particles move downwards in a spiral path into theunderflow chamber, while clean liquid moves upward to the center ofthe spiral, towards the top outlet.


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DECA Clarifier (optional)

The Company DECA Clarifier is an automatic hydraulic device,pecially designed to accelerate reactions through methodical re-circulation of the precipitates formed by the flocculent and influentwater. The DECA Clarifier operates continuously, to provide requiredeffluent water quality. The Clarifier consists of three chambers:

- Flocculation (reaction) chamber is a central conical chamber, whereinfluent water ejected through special nozzle.

- Intermediate cylinder, to reach a good growth of the flock.- Settling chamber, where a separation between sludge and the effluent water is achieved.

The water to be treated, mixed with flocculent, enter the DECA Clarifier through a venturi type on-

line flocculator placed in the bottom of internal (reaction) chamber. The up-stream flow offlocculated particles over close to the top to the intermediate cylinder chamber. This way the liquidis forced to flow downward precipitating heavier particles. The sludge deposited in the settlingchamber returns to the reaction chamber by induced flow. The resulting sludge enrichment allowsrapid flocculation and formation of the dense precipitate. The conical floor of the unit help thesludge slide toward the ejector for re-circulation. Concentrated sludge is collected at the bottomhopper and periodically released to drain. The effluent flows over the truncated conical collector intothe intermediate tank for further treatment. The DECA Clarifier has no moving parts.


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Multi Media Filters

The Company Multi media filters use combination of media layers asgravel, sand and anthracite as a bed that captures the suspendedmatter in the water flowing through. Multi media filters (DW serieswith total media height 1000 mm) use a unique design of a doublebottom chamber divided by a welded reinforced steel plate. The upperchamber contains the multi media and the lower chamber is emptyand collects the filtered water. The plate is covered by mushroom

diffusers, which are plastic, slotted conical units. The disperse ofwater uniformly, using effectively the whole media volume avoidingthe occurrence of channeling caking when operated correctly. Thefilter particularly suitable for back flushing a process involvingreversal of the water flow, causing a turbulent expansion of the mediaas a fluidized bed. The flushes out the entrapped debris effectively.

After the back flushing is completed, the filter resumes its normalfiltering mode as clean as a new filter. The back flush process activatedautomatically by controller or manually according to manufacturerinstructions.

Double Bottom Chamber

ODIS DW series filters employ a unique design of a double bottomchamber, divided by a welded reinforced steel plate. The upperchamber contains the media; the lower chamber is empty and collectsthe filtered water. The plate is covered by mushroom filtrationnozzles, which are plastic slotted conical units. The nozzles dispersethe water uniformly, effectively fluidizing the entire media volumeduring backwash. The Company filtration nozzles model E400-720


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Type L prevent the occurrence of channeling or caking thus ensuringlong service life and less frequent media replacement.

The Company filtration

nozzles model E400-720


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Media Chart

Media Type Media ParticleSize

Media Height(mm)

Basalt 1.2-1.8 mm 100

Quartz 0.8-1.2 mm 550

Anthracite 1.2-1.6 mm 350

Chemical Treatment

The water treatment plant integrates three types of chemical treatment:

Coagulant:Alum (a coagulant) is injected into the raw water in order to destabilize the colloidal matter andinto flock.

Flocculent (optional):Anionic polymer is injected into the mixing zone of the clarifier/flocculator to createthe bridging mechanism and to further improve the separation of suspended solids.

Disinfection: Chlorine (a disinfectant) is injected at the end of the process in order to kill harmfulpathogenic microorganisms and supply disinfected drinking water.


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Diesel GeneratorThe Company system includes Diesel Generator as a backup system in casesof electricity failure (in this case the Diesel system will start working automatically)or in cases of no available electricity power on site.

The Diesel Generator system includes a fuel tank that is stored inside an attached shadeto prevent any damage to the system.

Capacity: 50 KVA Motor: Diesel


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Automation and Control

The water treatment plant is fully automatic and all operating modes

are controlled by a PLC (Programmable Logic Controller). The PLCreceives signals from the floating levels, the electric valves (withsolenoids) and different controllers, thus controlling the start and stop

of the filtration pump, other pumps, chemicals dosing pumps, sludgewithdrawal, filtration mode and backwash mode.

Electrical Connection:Three Phases 3X400V (3X440V 60Hz may beordered)


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Reservoir Volume Chart

In order to ensure effective disinfections, retention time of 30 minutes is required after the chlorine injection.

System flow rate (l/sec )

Minimum Required TankVolume

4 7.5 m3

10 18 m3

15 27 m3

20 36 m3

25 45 m3

30 54 m3

50 90 m3

Connecting Accessories

The water treatment plant elements are connected withmanifolds and couplers, which are shot blast cleaned,phosphatized and lined with extremely corrosion proofpolyester electrostatic spay. The connecting accessoriesemployed by ODIS produce user-friendly system whichrequires minimal maintenance, are easily disassembled /

reassembled and are designed for long lasting operatinglife.

View inside the Plant


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Manifolds

All manifolds including bolts, nuts, washers and jointing materials is supplied and installed as part of theCompany Compact Water Treatment Plants.

The manifolds, couplers and connection elements conform to ASA, British Standard or ISO or other equivalentStandard approved by client.

The manifolds are made of plated carbon steel and have a 100-micron protective coating of extra durable

polyester applied electro-statically and oven cured on a zinc-phosphate layer for maximal anti-corrosionprotection.

The internal and external coating of manifolds and accessories is suitable for withstanding the effects of localclimatic conditions, the quality of the water and other corrosive factors.

Valves and Other Accessories

All valves and accessories are used in the WaterPoint Compact Water Treatment Plants - the high quality,fully tested equipment.

Structure Materials

The water treatment plant filters and separators are manufactured from robust first usecarbon steel ST 37 ensuring long lasting system operating life.


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Lining Process

The water treatment plant filters and separators lining employs maximum anti-corrosionprotection safeguarding the parts from weather, rust and chemicals.

The lining process is performed in seven stages as follows:

Stage 1: automated shot blast cleaning to a level of SA 2 as per ISO 8501Stage 2: phosphatization adds a protective layer of zinc-phosphateStage 3: rinsingStage 4: sealingStage 5: dryingStage 6: electrostatic polyester sprayingStage 7: oven curing

This lining process creates a perfectly coated product with a protective layer of 150 micron.


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Electrical EquipmentAll the electrical and electromechanical equipment including the required switchboards, sub-boards, control andindicating panels, electric motors, starters, cables, etc., are supplied ready for operation.

The electrical and electromechanical equipment incorporated in The Company Compact Water TreatmentPlants is manufactured in accordance with the standards and codes of IEC or VDE and with the other relevant

standards and codes.

The electrical equipment is of standard heavy design, suitable for operation under the existing climaticconditions and the duties set out in this specification.

Indicating Instruments

The indicating Instruments comply with IEC specifications.

The Company provide all indicating lights with colored, transparent caps.

The colors of the caps indicate the function of the light as follows:

Green: For normal operation of unit

Red: For malfunction or alarm light

Blue andYellow: For other functions


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Scope of Supply:

Description Feeding pump Cyclone mixer DECA Clarifier/Separator unit - stag Multi media filters - stage 2 Coagulation unit Connecting manifolds Hydraulic valves Flow limiting valves Water meter Pneumatic valves Control panel with PLC controller Control accessories Chlorinating unit Eye wash safety device Compressor Diesel Generator Air blower 40 mobile steel structure


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compact water treatment

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