Managing effluents for a fertiliser major
Chambal Fertilisers and Chemicals Limited (CFCL), one of the largest private sector fertiliser producers in India, partnered with Thermax for ‘Total Water Management System’ at Kota, Rajasthan. In the recent past, the fertiliser sector has seen tremendous growth, mainly due to the Government impetus on making India self-sufficient. With growth, the industry also faces the challenge of tackling effluent treatment and optimising the use of water, getting scarce by the day. CFCL’s water management initiative was part of its expansion project for manufacturing 2,000 metric tonnes of ammonia per day (MTPD) and 4,000 MTPD of urea. The system consists of a pretreatment and demineralisation plant, condensate polishing unit and an effluent recycle plant. The effluent recycle plant, based on ultrafiltration and Reverse Osmosis (RO) membrane system, recovers 91% of water. The RO system treats hardness and silica content in the water resulting in high-quality water having Total Dissolved Solids (TDS) less than 400 ppm. On the other hand, an advanced membrane based UF system is used for the removal of all types of fine colloidal impurities along with organics.