Distillieries - Environmental Clearance

DistilleriesTable 3-6: Important Components of Dried Fermenter’s SludgeS.No. Item Content (% by Weight)1 Moisture Content at (100°C) 4.142 Protein Content as (6.25 x N) 12.543 Acid Insoluble Matter 3.934 Mixed Oxide of Iron & Aluminum as (R 2 0 3 ) 1.235 Calcium Carbonate as (CaC0 3 ) 8.896 Calcium Sulphate as (CaSO 4 ) 40.027 Calcium Phosphate as (Ca3(P0 4 ) 2 ) 1.108 Magnesium Salts Traces9 Sodium Sulphate (Na 2 S0 4 ) 0.5710 Potassium Sulphate (K 2 S0 4 ) 0.61The total volume of wastewater discharged is about 90 kL/kL of RS produced wherecooling water base is once through. Whereas the total volume of wastewater wherecooling water is recycled is of the order of 47 kL/kL of RS produced. Figure 3-2 givesthe water material balance for a typical distillery based on molasses. Table 3-7 givesquantity of wastewater for different processing units of a molasses based distillery.Table 3-7: Quantity and Characteristics of Process WastewaterS.No.SourceFlow inkL/kL of RSBOD SS Type ofFlowmg/Lkg/kL ofRSmg/Lkg/kLof RS1 Spent Wash fromAnalyzer Column10.0 500002 Fermenter Sludge 0.05 1250003 Spent Lees fromRectifier4 Fermenter CoolingWater500 12000 120 Continuous6.25 50000 2.5 Intermittent1.0 500 0.50 16000 16.0 Continuous(Recycled)2.0 100-2005 Wash Water Fermenter (3500 as)6 Condenser Cooling Water0.40 500 1.0Not Recycled 50.0 - - - - -do-Recycled 2.5 - - - - Intermittent7 Boiler Slowdown O 15 - - - - -do-8 Water Treatment plant 2. 1 - - - - -do-9 Bottling Plant Washwater2.8 100 0.28 200 0.56 ContinuousTGM for Distillery Industry 3-11 August 2010