We, at Rajshree Sugars & Chemicals Limited, implemented various environment protections by adopting innovative technologies, infrastructure etc. and meeting the effluent norms set by the Tamilnadu Pollution Control Board.
Conventional sugar plant uses raw water for sugar processing and dump the surplus condensate as waste to the environment. Whereas in our sugar factory instead of raw water, excess condensate generated from the sugarcane is used for sugar processing since the sugarcane itself contains 70% of water. Apart from the above around 300 m3 per day of II body condensate is being sent to Distillery plant to reduce the distillery plant water consumption.
An Effluent Treatment Plant of capacity 825 m3/day with Anaerobic digester, Aaerators and Clarifier, which is first of its kind, had been installed to treat the effluent generated from the sugar processing. The entire treated water meets the norms set by the Tamilnadu Pollution Control Board and the treated water is used for our R&D cane field irrigation purpose.
The treated water is analysed through online monitoring system which is connected to Tamilnadu Pollution Control Board Water Quality Watch Centre, which in turn connected with the Central Pollution Control Board for close monitoring of the parameters.
20.5 MW/Hr Cogeneration plant with 110 Ata 545 deg.C High pressure Boiler with triple extraction cum condensing Turbine.
Flue gas generated from the Boiler is passed through the Electro static precipitator which removes the dust particles from the flue gas and after ESP, the flue gas is being let out through a chimney of 90 mtr height. This emission meets the norms set by the Tamilnadu Pollution Control Board.
The emission level is continuously monitored through Online Monitoring System which is hooked up with Care Air Centre of Tamilnadu Pollution Control Board. The emission levels are well within the norms set by the Tamilnadu Pollution Control Board i.e. <150 mg/NM3.
Apart from the above, in the Cogeneration plant an Air Cooled Condenser had been installed in place of conventional surface condenser which is highly water intensive. Around 600 m3 per day of raw water is saved by installation of air cooled condenser.
Ours is a zero discharge distillery plant and the entire effluent generated from the plant is completely incinerated in the Incineration Boiler after concentrating in various stages viz., Integrated Evaporation, Flubex and Finisher from 15 brix to 60 brix.
The concentrated spent wash is burnt in the spent wash fired Boiler and Coal is used as a supportive fuel for the same. The steam generated from this Boiler is used for power generation and the low pressure steam meets the complete power & steam requirement of distillery process.
Flue gas generated from the spent wash fired Boiler consists of fine particles, for which bag filter system had been installed to clean the flue gas which reduces the dust concentration and meets the norms set by the Tamilnadu Pollution Control Board i.e. 150 mg/NM3. Finally the flue gas is let out through the chimney of 76 mtr height. The emission levels are well within the norms set by the Tamilnadu Pollution Control Board.
The entire flue gas is closely monitored by online monitoring system which is hooked up with Tamilnadu Pollution Control Board.
During the processing of concentrated spent wash, the condensate is separated which is highly acidic in nature and having high biological load. The same is being treated through Anaerobic Digester and Extended Aeration Tank followed by Clarifier and the same is used for molasses dilution in Fermentation process.