ADB_book_18 April.qxp - Himalayan Document Centre - icimod

Table A9.1.2: Industry-Specific Tolerance Limits for Industrial Effluents Discharged into Inland Surface WatersSerialNumberParameters Generic Leather WoolProcessingFermentationVegetableGhee and OilPaper andPulp1 TSS, mg/l 30–200 100 1002Shall pass 850 -Particle size of TSSmicron sieve100 1003 pH Value 5.5–9.0 6.0–9.0 5.5–9.0 5.5–9.0 6–9 5.5–94 Temperature 0 C b < 40 405 TDS, mg/L, max 21006 Color and odor Absent c7 BOD for 5 days at 20 °C,mg/l30–100 100 100 60 100 1008 Oils and grease, mg/ l,max10 10 109 Phenolic compounds,mg/l, max1.0 5 (as C 6 H 5 OH)10 Cyanides (as CN), mg/ l,max0.211 Sulfides (as S), mg/ l, max 2.0 2.0 2.012 Insecticides Absent13 Total residual chlorine,1 600 max.mg/l14 Hexavalent chromium (as0.10.1Total 2.0Cr), mg/l, maxTotal 2.015 Nickel (as Ni), mg/ l, max 3.0 250 316 Sodium, %, max 6017 COD, mg/l, max 250 250 250°C = degrees Celsius, max = max imum, mg/l = milligram per liter, BOD = biological oxygen demand , COD = chemical oxygen demand , TDS = total dissolved solids,TSS = total suspended solidsa Under enforcement since B.S. 2058/1/17 (30 April 2001) .b Shall not exceed 40 0 C in any section within 15 m downstream from the effluent outlet.c No standards for color .Source: MOPE (2003)aTable A9.1.3: Industry-specific Tolerance Limits for Industrial Effluents Discharged into Inland Surface WatersSerial Parameters Dairy Sugar Cotton Textile SoapNumber1 pH 5.5–8.5 5.5–8.5 6.0–9.0 6.0–9.02 TSS mg/l, max 150 100 150 2003 BOD (5 days at 20 °C) mg/l, max 100 100 100 1004 Oil and Grease, mg/l , max 10 105 COD, mg/l, max 250 250 250 2506 Phenolic compounds mg/l, max 1°C = degrees Celsius, max = maxim um, mg/l = milligram per liter, BOD = biological oxygen demand , COD = chemical oxygen demand ,TSS = total suspended solidsaUnder enforcement since B.S. 2060/3/9 (23 June 2003).Source: MOPE (2003)a138 Environment Assessment of Nepal : Emerging Issues and Challenges