Page 539 - Industrial Wastewater Treatment, Recycling and Reuse

Zero Liquid Discharge Solutions 509

Table 13.5 ML stream parameters—cont'd
Solvents
1. IPA % w/w <1.25%
2. Acetone % w/w <0.50%
3. Methanol % w/w <0.60%
4. Ethanol % w/w <0.05%
5. TBME % w/w <0.05%
6. Ethyl acetate % w/w <1.00%
7. Toluene % w/w <0.25%
8. DMF % w/w <0.35%
9. DMSO % w/w <0.25%
10. Heptane % w/w <0.10%
11. Hexane % w/w <0.10%
12. THF % w/w <0.50%
13. Water % w/w 95%

Table 13.6 Utilities required
Description Unit ETP & recycling system ZLD system
Operating electrical load kW 80 100
Chemical cost Rs/m 3 25–27 For CIP
3
Cooling water (in circulation) m /h – 90
Steam kg/h – 860

Pharma API effluent

ML stream (High COD–high
TDS stream) Lean stream (Low COD stream)

From plant From plant nd
Product separation Reactor washings (2 washing
onwards)
First washing of reactors
Traces of solvents from plant
Utility waste
DM plant regeneration
RO water reject
Cooling tower blow down
Boiler blow down
Other
Floor washing
Figure 13.7 Typical pharmaceutical API effluent.