bio-ethanol plant...

File No. 28(1143)/2017/Pur/T- 68 Date: 18/09/2017

Revised Technical Specification & Clarifications issued after the Pre-Bid Conference for

THE PROCUREMENT, ESTABLISHMENT, COMMISSIONING AND TRAINING FOR

BIO-ETHANOL, BIO-HYDROGEN AND BIO-METHANE PRODUCTION UNIT

BIO-ETHANOL PLANT SPECIFICATIONS

Technical Specifications of 500 Liters Feed per Batch for Producing Bio-ethanol using Leather

Fleshing Waste.

S.NO ITEMS ICON QTY DETAILED ACCESSORIES

1. Pre-Fermentation

Tank

SS316, 500 Liters

volume pre-fermentation

vessel.

1

It should be 3 mm thickness with SS pump for liquid

transfer to fermentation vessels

a) S.S liquid flow indicator (glass 2”)

b) Reaction view port (3” Ø)

c) Raw material Loading port

d) Reaction test cork

2. s

s

Fermentation Tank

(1, 2 & 3 )

SS316, 500Liters

volume Fermentation

reactor. (Double wall

jacketed kettle for

cooling water

circulation)

3

Tank should be 3 mm, jacket volume 200L, pressure

1-2 kg/cm2

a) S.S liquid flow indicator (glass 2”)

b) Reaction pressure indicator (Analogue)

c) Reaction test cork

d) Buffer solution port

e) Automatic emergency

f) safety valve

g) Pressure relief valve (minimum 2 kg/cm2)

h) Thermo well with thermometer (min 65oC)

i) pH indicator (upto 14)

j) thermal resistance reaction view port (Glass)

k) Feed Loading port

3. Bioethanol Distillation

Kettle

SS316 (Thickness 3 mm,

Preferable steel

Manufactures – SAIL,

Jindal),

1

Distillation Kettle 250L holding capacity equipped

with 6-9 kW band type external heater, thickness

should be 3 mm

a) vapour outlet (SS316)

b) Over flow valve

c) drain control valves

d) S.S liquid flow indicator

e) Reaction pressure indicator

f) safety valve

g) Pressure relief valve

h) Reaction test cork

i) Buffer solution port

j) Thermo well with thermometer (min 100oC)

k) Reaction view port

l) Fermenter wash loading port

4. Bioethanol Distillation

column

SS 316 (Thickness 3

mm, Preferable steel


Jindal)

1

Distillation Column 250L Actual Volume (with

bubble trap / Rings / Packings), thickness should be

3 mm

a) vapour inlet & outlet (SS316)

b) over flow valve

c) drain control valves

d) S.S liquid flow indicator

e) Reaction pressure indicator

f) Pressure relief valve

g) Reaction test cork

h) safety valve

i) Thermo well with thermometer

j) Reaction view port

k) Drain port

5. Reflux/ Recovery

Condenser

SS316 (Thickness 3

mm, Preferable steel


Jindal)

1

Vapour condensing tubes in SS316, thickness should

be 3 mm, minimum Heat transfer area should be 2

m2

a) water inlet & outlet provision

b) Vapour inlet & condensate outlet with

recovery control valve and pipelines

c) Final vent

d) Pressure gauge

6. Carbon Steel Structure

-

The structure is a rectangular Carbon Steel box-pipe

structure to mount reactor and equipment’s. This

structure is specially designed in the form of a

portable skid. If required, the structure can be

transported to different sites.

7. Portable Electric

control panel

- A portable electric control panel with Three phase

switch gear system equipped with indicators, volts

and amps meter

8. Day-Tanks

(Storage Tanks)

4

Carbon Steel structure housing two 50 liters capacity

S.S 304 tanks with lid with opening and closing and

draining valve as Bio-Ethanol day-tank (storage) and

Residue day tank respectively. - thickness should be

3 mm

9. Bio-Ethanol 1 liter per

batch Laboratory kit 2

1 liter glassware Bio-ethanol lab kit as part of the

standard package. This lab kit should works in

tandem with the Bio-Ethanol unit during production.

10. Bio-Ethanol Testing

Equipment’s

Mandatory –

components of

Testing

Equipment.

2

a) Hydrometer (ethanol analyzer)

b) pH meter (0 - 14)

c) ORP meter (-500 to +100mv)

d) VFA testing kit (upto 5000mg/L)

11. Bio-Ethanol

plant tools/

accessories.

2

a) Suitable spanners, tools for dismantling

or adjusting and assembling the unit.

b) Other safety accessories like fire

extinguishers, apron set, glass sets etc.,

Note:

For more reference refer Annexures (Drawing)

Compo

nent

label

Component

Description

Make MOC Quantity Capacity

PRE FERMENTATION TANK

1 Vessel 1 SAIL/ Jindal SS316 1 500 L Effective Volume

(800 Ø x 1250) mm

1A Inlet pipe for raw

material feeding

SAIL/ Jindal SS 2”

1B Motor for stirrer Crompton/

Kirloskar/

Premier

- 1 1 HP

1C Lid for pouring in

Raw Material

SAIL/ Jindal SS316 1 3” Ø

1D Hinge to open lid SAIL/ Jindal SS316 1 Approp

riate

1E Stirrer rod / Shaft SAIL/ Jindal SS316 1 1''

1F Control Valve Reputed

standard make

- 1 2''

1G Flow Glass Reputed

standard make

- 1 2’’

1H,I,J Ball Valve Reputed

standard make

- 3 2''

1K Flush bottom valve Reputed

standard make

- 1 2”

1L Dummy inlets SAIL/ Jindal SS316 1 1/2"

1M Outlet pipe to jacketed

vessel 1


1N Pump Johnson/

Process pumps/

Kirloskar

SS 1 1 HP

1O Stirrer blade Reputed

standard make

1 80% ID of the

vessel

FERMENTATION TANK 1

2 Jacketed Vessel 1 SAIL, Jindal SS316 1 500 L Effective Volume

(800 Ø x 1250) mm

2A Inlet pipe from the

output of Vessel 1

SAIL, Jindal SS 1 2''


Kirloskar/

Premier

1 1 HP


Raw Material


2D Dummy inlets Reputed

standard make

1 1/2"

2E Pressure gauge Reputed

standard make

3kg/cm2

max

1 1/2''

2F Pressure Relief Valve Reputed

standard make

1-2

kg/cm2

1 1/2''

2G Stirrer rod / Shaft SAIL/ Jindal SS316 1 1''

2H Thermocouple Elmac 1 RTD

2I Stirrer blade Reputed

standard make

1 80% ID of the

vessel

2J Control Valve Reputed

standard make

1 2''

2K Flow Glass Reputed

standard make

1 2''

2L.M.N Ball Valve Reputed

standard make

- 3 2''

2O Flush bottom valve Reputed

standard make

- 1 2”

2P Outlet pipe to jacketed

vessel 2


FERMENTATION TANK 2

3 Jacketed Vessel 2 SAIL, Jindal SS316 1 500 L Effective Volume

(800 Ø x 1250) mm


output of jacketed

vessel 1

SAIL, Jindal SS 2''


Kirloskar/

Premier

1 1 HP


Raw Material



standard make

1 1/2"


standard make

3kg/cm2

max

1 1/2''


standard make

1-2

kg/cm2

1 1/2''




standard make

1 80% ID of the

vessel


standard make

1 2''


standard make

1 2''


standard make

- 3 2''


standard make

- 1 2”

3P Outlet to jacketed

vessel 3


FERMENTATION TANK 3

4 Jacketed Vessel 2 SAIL/ Jindal SS316 1 500 L Effective Volume

(800 Ø x 1250) mm


output of jacketed

vessel 2

SAIL/ Jindal SS 2''


Kirloskar/

Premier

1 1 HP


Raw Material



standard make

1 1/2"


standard make

3kg/cm2

max

1 1/2''


standard make

1-2

kg/cm2

1 1/2''




standard make

1 80% ID of the

vessel


standard make

1 2''


standard make

1 2''


standard make

- 3 2''


standard make

- 1 2”

4F Outlet to simple

distillation


Simple Distillation with fractio Reputed Standard make distillation column

5 Simple Distillation

vessel

SAIL/ Jindal SS316 1 250L Effective volume

(750 Ø x 625) mm

5A Fractional Distillation SAIL/ Jindal SS316 1 250L with (packing

materials / plates) (325 Ø

x 3000) mm

5B Condenser SAIL/ Jindal SS316 1 2m2

Heat transfer area

5C Ethanol collecting tank SAIL/ Jindal SS316 1 50L Effective value

(300 Ø x 500)mm

5D Inlet pipe from the

output of jacketed

vessel 3

SAIL/ Jindal SS 2''

5E Lid for pouring in

Raw Material


5F Dummy inlets Reputed

standard make

- 1 1/2"

5G,H Pressure gauge Reputed

standard make

- 2 1/2''

5I,J Pressure Relief Valve Reputed

standard make

- 2 1/2''

5K Thermocouple Elmac 1 RTD

5L Control Valve Reputed

standard make

- 1 2''

5M Flow Glass Reputed

standard make

- 1 2''

5N.O.P.

Q.R.S.T

.U.V

Ball Valve Reputed

standard make

- 9 2''

5W Outlet to drain SAIL/ Jindal SS 2”

5X Band type heaters 3 Standard

make

preferable

SS 1 6 – 9 kW

5Y Pump Johnson/

Process pumps/

Kirloskar

SS 1 1 HP

5Z Pump cooling water

circulation

Johnson/

Process pumps/

Kirloskar

- 1

1 HP

5@ Vacuum Pump Johnson/

Process pumps/

Kirloskar

- 1 1 HP

Technical Specification for Bio-Hydrogen and Bio-Methane Plant

Component label

Component Description Make and Unit MOC Quantity Capacity & Remarks

HYDROGENISER

1 Hydrogeniser Mechanical –

Mild Steel thickness of 5 mm and FRP lining as below Inside of the tank Layer 1 ; 450 GSM Fibre glass reinforcement Layer 2- 300 GSM or 450 GSM Fibre glass reinforcement Coating - First & Second Coating ( Two nos. of Coating) Outer Side of the tank Layer1- 300GSM Fibre glass reinforcement Layer2- 300GSM Fibre glass reinforcement Coating - First & Second Coating ( Two nos. of Coating)

1 17.5 m3 (Eff. Volume 15 m3) Feed rate = 3 m3/ day (L/D) = 1.7 ie., (4/2.335) m Hemispherical/Conical Dome Centre Height Depends on the Fabrication as mentioned like in diagram.

1A Pre – Hydrogen Tank Mechanical Mild Steel with FRP liner of 5 mm inside and outside

1 5 m3 (3 m3 for Feed and 2m3 for drain from Methaniser) - Bifurcation Tank Type

1B Water Level Indicator Mechanical Glass 1 30 mm dia

1C Ball Valve Reputed and Standard quality product

Appropriate 1 Appropriate

1D Inlet Pump Crompton/ Kirloskar/ Premier/ Johnson

Appropriate

1 2 m3/hr (Minimum feed rate )

1E Non Return Valve Mechanical Appropriate 1 Appropriate

1F Agitator Rod and Blade Salem Steel /Jindal (Mechanical unit)

SS 304 for shaft and Blade, Thickness of blade with minimum 6mm

1 Appropriate

1G Man Hole Mechanical as shown in the drawing

MS with FRP liner of 5 mm 1 Appropriate

1H Ball Valve Reputed and Standard quality product

SS316 1 Appropriate

1I Recirculation Pump Crompton/ Kirloskar/ Premier/ Johnson

Appropriate 1 3m3/hr (Minimum rate )

1J Ball Valve Reputed and Standard quality product


1K Agitator Motor ( Mechanical/ Electrical)

Appropriate 1 It should meet the followings; Type : Helical Gear Drive Rated Power : 1.5 KW Supply : 415V/3Ph/50HZ Mounting : Flange Mounting

1L Pressure Gauge Reputed and Standard quality product


1M Safety Valve Reputed and Standard quality product


1N Gas Vent Reputed and Standard quality product


1O Ball Valve Reputed and Standard quality product


1P Ball Valve Reputed and Standard quality product


1Q Inlet Pipe Mechanical Appropriate 1 Appropriate

1R Recirculation pipe ( Mechanical/ Electrical)

Appropriate 1

1S Outlet Pipe Mechanical Appropriate 1 Appropriate

1T Gas Pipe Mechanical Appropriate 1 Appropriate

1U Biohydrogen Balloon 50 m3 PVC Coated Fabric and UV resistance Fire Retardant

Appropriate 1 50 m3

METHANISER

2 Methaniser Mechanical Mild Steel thickness of 5 mm and FRP lining as below Inside of the tank Layer 1 ; 450 GSM Fibre glass reinforcement Layer 2- 300 GSM or 450 GSM Fibre glass

1 50 m3 (Eff. Volume 45 m3) Feed rate = 3 m3/ day (L/D) = 1 ie., (4/4)m Hemispherical/Conical Dome Centre Height Depends on the Fabrication

reinforcement Coating - First & Second Coating ( Two no. of Coating) Outer Side of the tank Layer1- 300 GSM Fibre glass reinforcement Layer2- 300GSM Fibre glass reinforcement Coating - First & Second Coating

2I Agitator Rod and Blade ( Mechanical) Appropriate 1 Appropriate

2J Man Hole Mechanical as shown in the drawing

MS with FRP liner of 5 mm 1 Appropriate

2K Ball Valve Reputed and Standard quality product


2L Recirculation Pump Crompton/ Kirloskar/ Premier/ Johnson

Appropriate 1 5 m3/hr (Minimum rate )

2M Ball Valve ( Mechanical) Appropriate 1 Appropriate

2N Agitator Motor Crompton/ Kirloskar/ Premier/ Johnson

Appropriate 1 Minimum 2.2 kw with flame proof

2O Pressure Gauge Reputed and Standard quality product


2P Safety Valve Reputed and Standard quality product


2Q Gas Vent Reputed and Standard quality product


2R Ball Valve Reputed and Standard quality product


2S Ball Valve Reputed and Standard quality product


2T Inlet Pipe Reputed and Standard quality product


2U Recirculation pipe Reputed and Standard quality product

Appropriate 1 5 m3/hr (Minimum rate )

2V Gas Pipe Reputed and Standard quality product


2W Outlet Pipe Reputed and Standard quality product


2 Bio-methane balloon 100 m3 PVC Coated Fabric and UV resistance Fire Retardant

Appropriate 1 100 m3

1 V Flare Unit Complete Mild Steel MS 1 set Connections are as per the drawing and it should be common flare system of Hydrogen and Methane from the two Balloons.

Note: The followings points are recommended.

Such as Wall thickness notations are refer in Annexure 1

Bifurcation of slurry feed tank for feed (3 m3) and drain(2 m3) is needed.

In Gas holders breather safety valves are need.

Overflow U tube hydraulics sealing in both digester need.

Hydrogeniser drain tube should be attached with Methaniser and the space between two digester as 1.5 - 2.0 meters only.

Ground level elevation should be minimum 1 meter above for both gas holders as well as digesters with proper civil / mechanical structures.

Compressor for both digesters - Should have minimum of 3HP for Hydrogen gas , 5HP for Methane gas with proper receiver. Motor Make (CGL/Siemens/ABB/Alstom/BBL) with flame proof. Recirculation pump – Should have in the range of 0.3 to 0.5 KW for Hydrogeniser and 0.8-1.00 kw for Methaniser digesters Slurry Pipeline - MOC of Pipeline Should be Mild Steel (MS) or UPVC or CPVC , Slurry Inlet Pipeline Size for each tank should be either 3" or 4" Slurry Outlet Pipeline Size for each tank should be 6’’. Gas Pipeline - Pipeline connection between Hydrogeniser & Balloon for Hydrogen gas storage and Methaniser Tank & Balloon for Methane Gas storage , MOC of Pipeline should be either MS or UPVC or CPVC Valves – recommended Make CRI/AMCO/LMV Agitator - Speed of Gear Box 15 to 30 rpm , Motor Flame Proof - VFD Compatible Motor, Motor Make CGL/Siemens/ABB/Alstom/BBL Manhole should have minimum 600 mm of diameter. Gas Balloons with Shed – Should have the followings:

High Frequency Welding

Canopy- Shed & Platform Arrangements

PVC Coated Fabric and UV resistance Fire Retardant Civil Platforms and Electrical lines - As per the necessary Platforms & Foundations .

CLARIFICATIONS

Firm Name: M/s. Kay Bouvet Engineering Limited, Chennai

Question 1 Kindly describe your process of production of Bio ethanol, Bio Hydrogen and Bio Methane starting from your raw material to final product.

Answer

Following Steps:- Waste Feed Slurry -Hydrolysis – Liquefaction- Solventogenises (Ethanol), Hydrogenesis (H2) - Methanogenesis (CH4) with specific yeast plus Microbial seed (Hydrogenic and methanogenic) inoculums.

Question 2 If possible kindly give the material balance in each and every stage of your process for unit weight of raw material so enable us to better designing of the equipment and related accessories & pipe lines etc

Answer Confidential because of our IPR issues. Whatever is given in the drawing may be executed as per specifications in the tender document modified after Pre-bid conference.

Question 3 Can you giving the design of the equipment. We will provide engineering Fabrication , erection commissioning etc

Answer Specification and BOM are given for all equipment with approximate design and you are permitted to modify the suitable design quality to merit your tender but at suitable cost. Fabrication may be done accordingly.

Question 4 We are manufacturing the sugar industries equipment and erection and commissioning of sugar and co gen industries in and around India and world. Can we eligible to submit the Bid for your proposed project.

Answer Yes, definitely if you have experience on Fermentation Bioethanol production.

Question 5 Can you extend the date of submission of Bid after the 20th Sep. 2017.

Answer Due date & time for submission has been extended to : Closing date - 11.10.2017 at 12.00 PM & Opening date - 11.10.2017 at 3.00 PM

Question 6 Furnish the location of the site.

Answer

M/s. Ranipet Tannery Effluent Treatment Company Limited, Common Effluent Treatment Plant, Chennai Krishnagiri Bye - Pass Road, V.C.Mottur Village, Vannivedu (Post), Walajapet - 632513, Vellore District, Tamil Nadu, India.

Firm Name : M/s. Enkem Engineers Pvt Ltd, Chennai

Question 1 Since CLRI is providing technology CLRI on award of work will provide the GA drawing in line with the Tender GA to enable successful tenderer supply

Answer No. CLRI have provided the basic drawings and No GA drawing will be provided by CLRI. This needs to be provided by tenderer only.

Question 2 The Performance Guarantee is Limited to Mechanical Performance Guarantee only and not on output of plant.

Answer It is also on gas output guarantee of the plant. H2 50 m3 /day (at 40%H2, 60%CO2), CH4 200 m3 /day (at 65%CH4, 30%CO2, 2.0% H2S )

Question 3

Request The Terms of Payment to be considered is 20% advance ,70% against supply and 10% on completion of trial run and mechanical performance run. The Performance security at this stage can be converted to Performance and can be made valid for 1 year from date of Trial run.

Answer

Amended as “20% advance against BG for 20%", 40% against supply of entire material + 100% Tax, 40% after erection, commissioning & trial run. 10% performance security to be provided within 21 days of receipt of Purchase Order to cover supply period, installation period and warranty plus 60 days”.

Question 4 Space for storage and covered space for storage of instruments etc.,

Answer Will be provided

Question 5 The Tender is requiring Automatic valve operation with pneumatic valves etc, this will require a PLC operated system, since this will be a fist demo plant suggest the PLC operated be SCADA based though expensive as this will allow monitoring of the data from any office , also please confirm if the entire flow sheet with all unit operation to be on display in the System that will come along with indication of all process data like , temp, biogas units in operation etc.

Answer Partial Automation is required. Where minor automatic system is possible, it may be provided. SCADA not required at this stage.

Question 6 Sir if GRP coated steel tanks are used then the GA drawings given for manufacture shall be final version as once fabricated openings cannot be made and if made will weaken the Tanks.

Answer No GRP, but MS with FRP inner and outer liner of 3mm inside and outside the digester.

Question 7 Kindly agree to extend Tender submission by atleast 10 days

Answer Due date & time for submission has been extended to : Closing date - 11.10.2017 at 12.00 PM & Opening date - 11.10.2017 at 3.00 PM

Question 8 a) Expected Biogas and Expected Hydrogen b) Where is storage planned for both, how will both gases be collected and stored ,

there is no mention in Tender kindly clarify c) Tender does not indicate the end use of Biomethane and Biohydrogen , the scope at

present stops with Pipe outlet of both Hydrogeniser and Methaniser

Answer a) H2 - 50 m3/day. CH4 - 200 m3/day

b) Given in the modified drawing

c) Only up to Balloon storage. Later the beneficiary can decide to use it either in boiler or gas engine for electricity generation.

Firm Name : M/s. Scigenics (India) Private Ltd, Chennai

Question 1 Brief process details for designing the reactors and transfer. Any specific areas where automation during the process is expected or is it completely manual.

Answer

Following Steps:- Waste Feed Slurry - Hydrolysis – Liquefaction- Solventogenises (Ethanol), Hydrogenesis (H2)- Methanogenesis (CH4)with specific yeast plus Microbial seed (Hydrogenic and methanogenic) inoculums. Safety pressure valves to be provide.

Question 2 Working volumes and gross volumes and their H/D ratios of each reactor

Answer Design of the reactors are done keeping in mind of H/D ratios. Please refer the modified drawings and fabricate/erect accordingly.

Question 3 The working pressure, design pressure, working temperature, design temperature for the vessels and the jackets is requested to be mentioned in the technical document.

Answer 2 bar, 0-50o C. Other details are given in the modified tender document.

Question 4 Requested to provide flexibility in jacket MOC (whether MS or SS304 )

Answer Only SS 316

Question 5 Requirement for a Jacket insulation and MOC is not mentioned in the document.

Answer Insulation not required amended in modified drawing

Question 6 Number of manual rotameters for the number of gases to be sparged inside the vessel and their flow rates to be mentioned

Answer

Minimum 3 with control valves. Gas flow rate 0-50 L/minute for Flow meters both manual and digital (one digital flow meter and one Rotameters or “U” tube manometers with orifice plate , with any manual biogas composition analyser (Arsat apparatus) to profile CH4, CO2, H2 Pressure and flow can be controlled manually.

Question 7 Whether the stirrers used in the system have fixed speed or variable speed.

Answer With Variable Speed Drive

Question 8 The impeller type and numbers required.

Answer Axial 3 , One for H2 , One for Methaniser and one for common feed preparation tank

Question 9 The viscosity and the nature of the medium

Answer Details are provided in the revised tender document.

Question 10 Whether the motors used in the bioethanol fermenters require flame proof type.

Answer Yes

Question 11 The type of the tank bottom valve and their sizes.

Answer Flush bottom type Valve

Question 12 Require flexibility in the make of the major items to be used in the project ( at least three makes to choose upon)

Answer Provided in the modified tender documents

Question 13

Request to confirm the scope and battery limits of the supplier for the following : a) Civil work, electrical wiring and routing, and utility header piping and

connections, man power / crane/ hoists to be provided for placement of the equipment at site.

b) Details of the Utilities and their capacities supplied for the operation of the plants.

c) Pressure regulating valves and systems.

d) Drain line provisions and setup

Answer

a) Executer has to arrange. Lines will be provided to the nearest point. Basic civil work will be done.

b) 3 m3 per day Fleshing- 1T/day Glycerol- 1T/day Primary sludge – 1m3/day

c) Yes. Needed in all the places as required from outlet of the digester.

d) Drain line will be provided

Question 14 Layout of the Plant and probable locations decided for the reactors.

Answer Layout drawing enclosed in revised tender document.

Question 15

Below mentioned are the points which are open ended and will have ambiguity during commercial offer preparation. The offers provided by vendors may vary and will have wide commercial implications. Hence we kindly request you to define the actual requirements, which will greatly help in providing an appropriate best quote for the project

Clarity on the list of glass wares, sizes/volume.

The number of VFAs may vary from process to process and hence we request you to define the type of VFAs which the scientists are intending to quantify or identify. The methods may also vary for determination. Hence we kindly request you to elaborate on the chemicals intended for the operation, probable quantities or any specific make of kits required for the process.

Request you to define the safety gears and accessories required.

As discussed during the meeting we would like to re iterate that the items excluded from the warranty are consumables like “O’ rings, Glassware, gaskets, etc. Also excluded are all sensors, probes, filters which have definite vendor/ Manufacturer warranty.

Breakages may arise due to mishandling which cannot be covered under guarantee. We would recommend to mention total number of additional probes, sensors, glassware, filters which may be required for the project in addition to the ones supplied. This will also help in budgeting for the project.

Answer

Not required (modified in the revised tender document)

Acetic, Butyric, Propionic , Valeric and IsoValeric acids.

Gloves- 10 pairs, Goggles- 5Nos, Safety Helmet- 10Nos, Gumboot – 5pairs

Gas mask respirators 50 numbers

Yes, reputed brands are mentioned in the revised tender document.

Yes, reputed brands are mentioned in the revised tender document.

COMMERCIAL

Question 1 The procurement/ fabrication may require a lead time of 18 to 20 weeks. We request you to consider the delivery terms as 20 weeks.

Answer Not more than 16 weeks

Question 2 The penalty clause for the late delivery as mentioned in the document is 0.5% per week. We request you to consider not more than 5% of the late delivery penalty which is a standard practice in all the industrial projects.

Answer The penalty clause stands. It has been the same for all our projects.

Question 3

We would like to mention the payment terms as received by us previously for the supply of bioethanol plant to a CSIR institute. We would request you to consider the following payment terms.

o 25 % of the purchase order value on submission of Bank Guarantee provided by M/s. SIPL

o 45 % + taxes on Purchase order value on completion of Factory acceptance test

o 20 % of the purchase order value on installation.

o 10 % on commissioning and trial run and on submission of PBG for 10 % order value valid for 1 year and 2 months.

Answer


Question 4

We would also wish to highlight about the site readiness during the delivery of the reactors and items. We request you to consider a delay of not more than two months in releasing the installation- part payment (in case the site is not ready during the delivery of the items.)

Answer Basic Site will be ready. Special requirement of site has to done by before delivery and installation of the equipment.

Question 5 We found an ambiguity in the warranty duration in the document kindly confirm the same.

Answer Atleast one year of all components Guarantee must be given.

Question 6 We request you to note that the site preparation cannot be in our scope as the readiness of the site relies on the user end.

Answer Basic site preparation will be done by us. Specific requirement for installing the equipment has to be done by executor.

Firm Name : M/s. ASTRAAL, Chennai

COMMERCIAL POINTS

Question 1 Terms of payment mentioned in the Tender Documents – (GCC.2.22.1) is not acceptable to us. Our payment terms will be specified in our offer.

Answer


Question 2 Bids Validity has to be modified from 180 days to 45 days, as the total supply to be completed in 6 months from the date of Tender opening.

Answer No need to modify

Question 3 In lieu of Performance Security (PS) – Clause 2.13, we shall agree retention of 10% order value for a period of 12 months from the date of completion of supply.

Answer PBG will have to be provided within 21 days of placement of PO for 10% of the PO value covering the supply period, installation period, trial run period and the warranty period plus 60 days.

Question 4 Warranty / Guarantee will be for a period of 12 months from the date of supply as clarified in the meeting.

Answer One year from the date of installation

Question 5 We will be insuring the goods for transportation from our premises to CLRI factory site. Our insurance charges will not cover storage of goods at your premises.

Answer Agreed.

Question 6 Protection against Damages (2.38) The responsibility lies with the successful Tenderer, if any damage or loss to the property or person of the institute occurs while undertaking the contract

Answer The clause stands.

TECHNICAL POINTS

Question 1 Please specify the total height of Overhead Cooling Water Tank supplying water to the fermenters and condensers through the header. This is required for designing the fermenters & condensers.

Answer Pump can be used. Crompton/ Kirloskar/ Premier/ Johnson Pumps

Question 2 Please clarify the disposal or reuse of hot water coming out of Fermenters and Condensers.

Answer Will be used in the Bio-methanation plant

Question 3 Consistency of the contents of the prefermenter such as % of solids, viscosity, sp.gr. and working pressure of prefermenter.

Answer

Hydrogeniser Input TS =15 -20 % , VS =60-80% Methaniser Input TS =8 – 12 % , VS =40-55%

Question 4 Final RPM of the agitator.

Answer With Variable Speed Drive

Question 5 For control valve, flow glass & ball valve you have specified 3” sizes. We feel the size is very big?

Answer Amended and details are provided in the revised tender document.

Question 6

Fermentation Tanks 1, 2 & 3

Working pressure inside the Fermentation Vessel.

Consistency of the contents of Fermenters such as % of solids, viscosity, sp.gr.

MOC of outer jacket of fermenter – Mild Steel or SS 304.

Final RPM of the Agitator.

Control valve, flow glass, ball valve specified as 3”. Please clarify?

For all the fermentation vessel you have provided agitator systems with motor

and reduction gear unit. We suggest instead of agitator system, pumps for

circulating wort (fermenting wash). As agitator system will be costlier than

circulating pump. - Please clarify.

Method of transferring fermented wash to the distillation kettle is not

mentioned. – Please clarify this point.

Answer

1-2 kg/cm2

TS =15 -20 % , VS =60-80 %,

SS 316

VFD based 5 to 100rpm

Details are provided in the revised tender document

Yes Modified

Vacuum Pump

Question 7

Distillation Vessel

Holding capacity ?

Distillation time required?

1 – 3 KW electrical heating coil – not suitable as the contents in the vessel if flammable.

Suggest Thermo Fluid System or steam heating. - Specify preference. If Thermic fluid system is required, then Thermic Fluid Holding Tank, Circulation Pump and Electrical Heating system is required. If Steam heating is chosen, a package type boiler is required with accessories such as Overhead Water Tank, Water Circulation Pump. For this Boiler fuel can be Coal / Furnace Oil / Firewood. - Please clarify.

Liquid Flow Indicator is not required. Instead level gauges recommended.

Ethanol Collecting Tank size & capacity to be mentioned. Since only 500 litres of fermented wash is distilled at a time, the distillation system can only be Batch Type.

Answer

500 Liters

2 hours

With Band type heater

Yes, Level gauges accepted.

150 L/d

Question 8

1. The warm water / hot water coming out of fermenters and condensers can be reused by cooling the same in a cooling tower . Otherwise you have to use fresh cold water from source of supply such as bore well, open well or government supply. Please clarify

2. While you have provided pump for fermentation Tank No.2 and Fermentation Tank No.3, no pump is provided for fermentation Tank No.1. Please clarify.

3. If the fermentation is done in Aerobic conditions, for supply of air, an air compressor is required which is missing in your Tender specifications. Please clarify.

4. Please specify what is 1K, 3M, 4M and in between the line of Alcohol Tank 1 (5B) and Fractional Distillation (6) coloured as “Pink” Box in your flow Diagram

5. What is the size of the shed available for accommodating the bio-Ethanol Plant? (L x B x H)

Answer

1. Yes, there are plenty of treated tannery effluents with less then 500 mg/L TDS for recirculation’s onsite.

2. Specified in revised tender

3. Anaerobic fermentation

4. Specified in revised tender

5. The site visit was arranged to check the available space and again anyone wanted to see the site they can visit the site on their own.

Firm Name : M/s. B-Sustain Energy Projects Private Limited, Chennai

Question 1 Is there any feed preparation process required before Pre-Hydrogen Tank such as Crushing or Shredding or Pulverizing for particle size reduction (if the raw material is leather solid waste, please let us know the particle size, Moisture, TS and VS)

Answer Yes required and included in the modified design.

Question 2 If particle size reduction is required the Pre-Hydrogen tank will act as a collection cum mixing tank for required total solids in substrate before feeding or separate tank is required.

Answer Separate tank is required but excluded in this unit.

Question 3 The feed rate mentioned is 3m3/day for Hydrogeniser, if the feed supplied to the Pre-Hydrogen tank is liquid effluent (if liquid effluent, let us know the value of BOD, COD, SS, VS, TS and pH)

Answer It is not a liquid effluent but solid waste at 2 to 5 % (ethanol residue ) , 3 to 10 % (sludge from thickener) and 12 to 15 % (Tannery fleshing)

Question 4 The gas holder capacity with canopy is not shown for Bio-Hydrogen and Bio-Methane gas storage.

Answer Details are provided in the revised specification and drawings.

Question 5 Heater and Compressor is required in any of our process or not. If required, please clarify in which stage.

Answer Inline heater at digester Recirculation line /feed line.

Question 6 Bio-Hydrogen and Bio-Methane gas generated is used for cooking(mention capacity and number of burners) or Power generation (mention gas genset capacity) or flaring.

Answer Common flaring unit to provide. Gen-set engine can be decided by the beneficiary later

Question 7 Hydrogeniser and Methaniser construction can be either RCC or GRP

Answer Details will be provided in the revised specification and drawings.

Question 8 Screw pumps are recommended for recirculation and please specify the stator and rotor material grades.

Answer Scope of tender

Revision in the Tender Document with regard to commercial terms:-

1. Payment Terms:

Amended as “20% advance against BG for 20%", 40% against supply of entire material + 100% Tax, 40%

after erection, commissioning & trial run. 10% performance security to be provided within 21 days of

receipt of Purchase Order to cover supply period, installation period and warranty plus 60 days”.

2. Performance Security:

Performance Bank Guarantee (PBG) will have to be provided within 21 days of placement of PO for 10% of

the PO value valid for the supply period, installation period, trial run period and the warranty period plus

60 days. On submission PBG the EMD would be refunded. In case the PBG is not received within 21 days of

the receipt of the PO, Director CLRI would be free to cancel the Purchase order.

3. Last Date for Submission of Tender:

Tender Closing Date : 11th October 2017 upto 12.00 P.M. (IST)

Tender Opening Date : 11th October 2017 at 3.00 P.M. (IST)

The tender specification, drawing and commercial terms would stand changed to the

above extent. The revision may be read in conjunction with main tender document.

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