RECOVERY OF POTASSIUM SULPHATE AND OTHER VALUABLE PRODUCTS FROM SPENT WASH LEADING TO ZLD SYSTEM

摘要

The present invention relates to a process (100) for recovering potassium sulphate and othervalue added product from distillery spent wash, said process comprising: removing (102)high molecular weight organic compounds from the spent wash to obtain a first liquidfraction; concentrating (104) the first liquid fraction to obtain a first solid fraction; subjectingthe first solid fraction to thermal decomposition (106) to obtain a second solid fraction;dissolving (108) the second solid fraction in a solvent to obtain a second liquid fraction; andrecovering (110) potassium sulphate from the second liquid fraction. The value addedproducts include magnesium sulphate, activated carbon, and high molecular weight organiccompounds. Additionally, water as contained in the spent wash can be recovered for re-use.