Lab Based Ongoing Research Project

AMMONIA STRIPPING AND SULPHATE REMOVAL USING MAP ENZYMATIC PROCESSES IN A HYBRID UASB REACTOR

This USAB reactor was aimed to have TDS removal using high salt tolerant anaerobic halophillic bacterium in TDS reject and sole/pickled liquor of tannery waste water. The biogranulation process, bio–kinetics hydrolysis and methanogenesis Kinetics are studied by Ph.D students. The interphase between biological de-carboxylation with de-nitrification.and de-sulphurisation is broken to minimize the release of free-ammonia and H₂S through a chemical (MAP) and enzymatic (hydrogenases) processes using a hybrid UASB reactor.

Lab Cum Field Based Research Project

TWO STAGE BIO - SCRUBBER FOR BIO – GAS PURIFICATION OF H₂S AND  CO₂ SCRUBBER USING THIOBACILLUS AND NANOCHLOROPSIS

The cleaning up of biogas is an important process for enriching the CH₄ content in biogas. Many existing chemical gas purification methods are very expensive and difficult to operate. Many chemical and physical biogas purification technologies are available for the elimination of H2S and CO2 which are expensive to operate. Alternatively, the biological purification of CO₂ + H₂S using bacteria and algae pave a path for a paradigm shift in biogas conversion into Bio-CNG technology to operate cars and busses. Therefore, the above micro algae based CO₂ removal and Thiobacillus based H₂S removal in a two stage bio-scrubber are experimented and used for purification / Enrichment of biogas with 95% and above CH₄ content that can be converted into Bio-CNG for cars and busses.

Lab Cum Pilot Plant Model

AEROBIC AND ANAEROBIC MBR FOR HYPER–SALINE TANNERY WASTE WATER USING HALLOPHILLIC SALT TOLERANT ANAEROBIUM WITH SULPHATE AND AMMONIA CONTROL

The Upflow anaerobic sludge blanket (UASB) reactor implemented for tannery waste water in Jajmou, Kanpur (UP) in 1984 did not have control over the high sulphate content and high ammonia toxicity. The optimum COD/SO₄^2-(COD/Sulphate) ratio and Carbon /Nitrogen (C/N) ratio COD/TDS ratio are vital factor for maximum recovery of biogas. For the successful benefit of an anaerobic digester or a reactor, it is essential to have designed the UASB with insitu sulphidogenesis and ammonia control techniques particularly for the tannery waste water. This is to avoid the reduced percentage of CH₄ in biogas and precipitation of sulphur and formation of H₂S in the digester. The anaerobic membrane bio reactor (An-MBR) coupled with insitu sulphate control and ammonia control, becomes an efficient biogas and electricity generating technology being operated successfully in many parts of the world. For instance, Dr. P. Shanmugam has successfully operated and researched an aerobic MBR in University of Leeds, UK followed that he has guided PhD and an M.Tech students on Anaerobic- MBR for the past fo, and he has successfully devised and operated An-MBR treating tannery waste water for biogas and power generation. In view of the above a 1 MLD demonstration plant of tannery waste water using AnMBR with insitu sulphate and ammonia control has been demonstrated successfully in CLRI laboratory. This technology has been presented in DIPP for the funding request of Rs. 22.00 Crores and sanctioned principally by DIPP in the year 2015.