Thermax has introduced Biocask to treat wastewater. A compact system that meets stringent pollution control norms, it can fit into basements with a clear height of three metres. Ideal for housing societies, IT parks, commercial complexes, hotels and small industrial units, the treated wastewater from Biocask can be recycled. Its design was validated by Bhabha Atomic Research Centre (BARC) and IIT Delhi, following which a patent was awarded in 2015.
Biocask has been innovatively designed using a unidirectional (circular) fluidisation pattern, making efficient use of oxygen required to degrade organic impurities biologically in the water – an improvement on conventional treatment systems. Compared to the two-stage vertical structure of available systems, its single-stage configuration reduces civil work and fabrication costs.

Ramada resort in Goa is using Biocask to supplant its existing sewage treatment plant that wasn’t providing the desired output. A 300 m3/day Biocask installed in the basement has replaced the earlier system without any demolitions. It is meeting the resort’s requirement of keeping the outlet biochemical oxygen demand (BOD) less than 5 parts per 100,000 of suspended matter. The treated sewage is recycled for landscaping and gardening.

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