Resource detail

Title: Combitreat-ISBR: a case study
Organization:HNB Engineers Pvt. Ltd
Source:HNB Engineers Pvt. Ltd
Date:October 2013

Combitreat–ISBR is a sewage treatment technology developed by HNB Engineers Pvt. Ltd. Combitreat-ISBR seeks to break through the existing mediocrity in the field of sewage treatment and usher in a paradigm shift. Combitreat provides anaerobic treatment to sewage and reduces the organic load to be handled by further treatment. ISBR provides aerobic treatment and stands for Improved Sequential Batch reactor which means, that it has some improvements over the conventional SBR sewage treatment technology. Combitreat-ISBR requires very less electricity as compared prevalent technologies. Not only does it use less electricity to treat sewage, but it also utilizes its state-of-the-art design to generate electricity through two avenues – biogas and hydropower. Combitreat-ISBR requires minimal land area and can be easily fit into the most difficult and arduous urban locales.

HNB has commissioned a 30 MLD capacity STP based on Combitreat–ISBR technology, for Pimpri Chinchwad Municipal Corporation at Akurdi.

30 MLD capacity STP @ Akurdi, Pune based on Combitreat-ISBR technology

Photograph. 30 MLD capacity STP @ Akurdi, Pune based on Combitreat-ISBR technology

Outcome/Benefits: The plant is suitable for urban, semi urban and even rural areas. Another advantage of this technique is that Combitreat and ISBR can be detached, if required and only ISBR can be installed to produce hydropower. When only ISBR is installed, the pumping requirement for the STP reduces because it is a constant level process and thus large saving in power is achieved. Combitreat-ISBR consistently delivers BOD<10 mg/l, TSS<10 mg/l (Pollution Control Board requires BOD<20 mg/l, TSS<20 mg/l) and gives high nitrate and phosphorus removal. This level of treatment makes it ideal for countries like India where the future demands sewage reuse.

Commercially tested: Yes

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Patent Details: Patent pending