PROCESS FOR REDUCING DISTILLERY SPENT WASH TO ZERO POLLUTION STATUS

摘要

Process for reducing total volume of distillery spent wash during its unidirectional pressure circulation from spent wash reservoir into at least two series connected RO filter modules through a plumbing network and splitting said spent wash into clear or slightly coloured PERMEATE and REJECT streams thereby reducing by 50 % the total distillery spent wash characterised in that said PERMEATE being colourless or faintly coloured water suitable for recycle and said REJECT stream being suitable for composting and characterised further in that said plumbing network comprises a combination of equipments such as centrifugal pump; pressure regulating means; pressure actuated switches; fluid pressure monitoring gauges; stop cocks; means for adjusting spent wash pH to around 6.5 by addition of hydrochloric acid or alkali; a stirrer; a combination of sand filter for sieving suspended particles of 100 micron size; filter cartridge for sieving 10 micron particles; a pressure injector for injecting at preset intervals anti-scalant compound into said filtrate by a piston pump.