Studies on Zero Liquid Discharge (ZLD) plant in API Manufacturing Unit

Srinivasarao Gangavarapu; Dr. Uma Maheswara Rao Ganguru; Sunil Kulkarni; Narasimha MurthyBrahmandam

Abstract

The concerns over the environmental impact of water pollution has increased, and also ground water resources are gradually being depleted.In the current situation, it is required to recycle the wastewater generated from industrial outlets. On other hand, environmental authorities are being directed to establish “Zero Liquid Discharge (ZLD) plants” in all industrial sectors. A study was conducted in a medium scale API (Active Pharmaceutical Ingredients)manufacturing industry where wastewater recycling through ZLD plant. The investigation shown that the plant was generated high quality water which was suitable to recyclein plant premises and which resulted in reduction of water consumption to 40KLD (Kilo Liter per Day).Total source of effluents generated in operations were categorized to HCS (High Concentration Streams) and LCS (Low Concentration Streams). HCS are treated in HCS effluent treatment unit and LCS in LCS effluent treatment unit. The HCS effluent treatment unit made of a Solvent stripper, MEE (Multiple Effective Evaporator) and ATFD (Agitated Thin Film Drier), and LCS effluent treatment unit made of a SBR (Sequential Batch Reactor) and MBR (Membrane Bio-Reactor). The other unit which is called as water recycling unit consisting RO (Reverse Osmosis) plant and P. RO (Polishing RO) plant. The pilot plant of ZLD shown a huge reduction in TDS (Total Dissolved Solids), TSS (Total Suspended Solids), BOD (Biological Oxygen Demand) and TSS (Total Suspended Solid) to 99.2, 100, 100 and 99.9 percent respectively.

Keywords

ZLD, Re-cycle, API wastewater, MEE, Stripper, SBR, MBR, RO

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Cites this article as

S. Gangavarapu, D. U. M. R. G. , S. K. , N. M. , "Studies on Zero Liquid Discharge (ZLD) plant in API Manufacturing Unit", International Journal of Innovative Research in Engineering & Management (IJIREM), Vol-2, Issue-5, Page No-33-36, 2015. Available from: