parth laboratories pvt. ltd., rajkot –...

PARTH Laboratories Pvt. Ltd.,

Rajkot – Gujarat.

ANNEXURE

Point Wise Submission of Additional Details as requested by the SEAC

Sr. No. Information Sought Attachment Page No.

1 Give characteristics of raw effluent, after treatment and before treatment and before evaporation. APPENDIX – A 1

2 Compliance of Point No.: 5 & 8 APPENDIX - B 2 – 10

3

Details of emissions from the stack attached to the evaporator and mitigation plan to ensure control of any of the pollutants

(substances)within prescribed limit as mentioned in the GPCB norms (Whichever is applicable)

APPENDIX - C 11 – 14

4 Characteristics of ML to be recycled with feasibility APPENDIX - D 15

PARTH Laboratories Pvt. Ltd., Rajkot – Gujarat.

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APPENDIX - A

Characteristics of Raw Effluent and Treated Effluent (before evaporation)


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APPENDIX - B

Manufacturing Details

Diethylmalonate added with Sodium Methoxide is charged in to a reactor and stirred for several hours. Then alkyl Bromide is added and refluxed cooled and pH is adjusted. Subsequently DM Water is added and centrifuged. Solid (Intermediate-I) is thus obtained. The purified wet cake is recrystallised and mother liquor is collected for recycle. Intermediate – I thus obtained is dried and refluxed with industrial solvents. After the reflux, the industrial solvents is distilled and recovered and further distillation gives Intermediate-II, in which caustic flakes is added and the mass is stirred and evaporated to dry and then pulverized which is the Finished Product.


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The previous stage wet cake is crystalised in required quantity of water, after the

process of centrifuge filtration the mother liquor is collected and the same is used in for

the crystalisation of next batch after the addition of very little water to top up the

required quantity. By doing this process, the product which is crystalised and believed

it might remained in mother liquor, is regained to overcome the loss of the product. In

general, where it is feasible to regain the product this process is adopted and in our

case it is very much feasible and advantageous.


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Water Consumption

Sr. No. Category

Water Consumption in KL/Day

(Existing as per CC&A)

Water Consumption in KL/Day

(Enhancement) Total Consumption

in KL/Day

1. Domestic 0.300 0.600 0.900 2. Industrial

a. Process 0.200 0.500 0.700 b. Boiler 0.300 0.600 0.900 c. Cooling 0.500 0.800 1.300 Total (Industrial) 1.000 1.900 2.900

Waste Water Generation

Sr. No. Category

W/w Generation in KL/Day (Existing)

W/w Generation in KL/Day

(Enhancement) Total W/w Generation

in KL/Day

1. Domestic NIL NIL NIL 2. Industrial

a. Process 0.100 0.250 0.350 b. Boiler NIL NIL NIL c. Cooling NIL NIL NIL

Total (Industrial) 0.100 0.250 0.350

Raw Materials and Water consumption per MT of production. Sr. No. Name of raw materials Name of product Consumption of raw

materials per MT (in Kg) 1. Diethyl Malonate

Valproic acid and salts

1628 2. N-Propyl Bromide 2621 3. Sodium Methoxide 1103 4. HCl 2825 5. Caustic Flakes 1121 6. Water 1300


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Water Break up : Total i.e. (Existing + Proposal) Please learn that our unit is a single product manufacturer and there are no different

streams of effluent generation from process. The characteristics of the Effluent from

process is as per Exhibit - A


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Adequacy & Efficiency of Waste Water Treatment

Water Environment

The Water Balance Diagram for manufacturing of Valproic Acid & Its Salts (Existing +

Proposed i.e. Total) is as mentioned in Figure: 2 .

The unit procures its water requirement from the Industrial Estate Supply of Aji Industrial

Estate.

Domestic Water:

Consumption:

Domestic Water Consumption for the unit as per existing is 0.3 KL/Day and 0.6 KL/Day for

proposed enhancement i.e. 0.9 KL/Day in Total Entity.

Treatment Scheme:

The entire domestic sewage/effluent generated is entirely disposed off through Septic Tank /

Soak Pit System.

5.2.2 Industrial Water:

Consumption:

As per the present scenario the unit intends to consume fresh water @ 1.0 KL/Day for existing

and 1.9 KL/Day for proposed enhancement i.e. 2.9 KL/Day in Total Entity for its industrial

purpose which includes process, boiler, cooling.

Following the above consumption, the unit envisages 0.1 KL/Day for existing and 0.25 KL/Day

for proposed enhancement i.e. 0.35 KL/Day in Total Entity of effluent generation which shall

be treated through Activated Sludge Process and the treated water as per the standards

governed by various statutory authorities. The treated water is ultimately evaporated through

Steam Jacketed evaporator system. Hence there shall be NIL Discharge of any kind of

Industrial Effluent.


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Treatment Scheme:

The Effluent thus generated by above consumption shall be treated as follows:

1. Effluent from process is collected in equalization and neutralization tank A (Size: 1.6 x 2.46

x 2.00). The effluent is collected for pH 7 to 7.5 by alkali / acid under stirring.

2. Effluent after adjusting of pH is transferred to tank B (Size: 1.6 x 0.92 x 2.00) for setting of

precipitate formed if any.

3. Effluent from tank B is transferred in aeration tank C (Size: 1.6 x 0.92 x 2.00).

4. Effluent from tank C is transferred in tank D (Size: 1.6 x 0.92 x 1.50) for holding and then

to applied energy induced evaporation pan of dia.3’ 9” for complete evaporation, hence

ZERO disposal of Industrial effluent.

- Figure:1 Schematic Diagram of ETP


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Figure:1 Schematic Diagram of ETP


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Details of Evaporator

Evaporator Pan is constructed in Stainless Steal Material. The Pan is provided with Heat Source i.e. the Boiler Steam bearing 80 °C Temperature in the MS Jacket provided in the Evaporation Pan. The Capacity of the Pan is 1 KL is thus adequate to evaporate 0.350 KL/Day of effluent generated in out plant and thus is viable to adopt Zero Liquid Discharge.

The Residue generated from the evaporation process shall be disposed off to TSDF Site.


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APPENDIX – C

Details of Emissions from the Stack attached to the evaporator


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From the above results, we can conclude that there is no requirement of enhancing the

Air Pollution Control Measures attached to the evaporator as the quality of exhaust gas

is well within the standards. It should be also noted that the effluent generated from

our unit is very low i.e. 0.350 KL (350 Liters) Only, and the Total COD Load in our

treated effluent is also very low i.e. 160 mg/L. Thus, there are minimal chances of

higher VOC or any other pollutants above the prescribed level.


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APPENDIX – E

The previous stage wet cake is crystalised in required quantity of water, after the

process of centrifuge filtration the mother liquor is collected and the same is used in for

the crystalisation of next batch after the addition of very little water to top up the

required quantity. By doing this process, the product which is crystalised and believed

it might remained in mother liquor, is regained to overcome the loss of the product. In

general, where it is feasible to regain the product this process is adopted and in our

case it is very much feasible and advantageous.

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