Activity of sulphate reducing bacteria according to COD/SO42- ratio of acrylonitrile wastewater containing high sulphate

Abstract

This study was performed to evaluate the biodegradability of acrylonitrile wastewater, microbial inhibition effect of acrylonitrile wastewater on removal efficiency and the activity of sulphate reducing bacteria (SRB) according to COD/sulphate ratio. Acrylonitrile wastewater was hardly biodegradable in a biodegradability test, however, SRB activity was 57% for overall consumption of electron donor and it was relatively high value compared to 17% of reference test with glucose. COD removal of acrylonitrile wastewater was improved to 57% and 61% from 20% as the COD/sulphate ratio were 0.5 and 0.3 by sulphate addition to acrylonitrile wastewater. First order reaction rate constants k on organic removal of acrylonitrile wastewater were 0.001, 0.004 and 0.004 at each COD/sulphate ratio of 0.9, 0.5 and 0.3. Thus it was suggested that the activity of SRB was a significant factor for removing organics and sulphate simultaneously in acrylonitrile wastewater.

Destroying the Chemical Potential of Spent Lithium-Ion Batteries in Green Soaking Media

“…In addition, sulfate ions in water do not have great ecological toxicity. The treatment methods such as chemical precipitation and anaerobic treatment are relatively simple and low cost. , However, the residual sulfate in wastewater can easily cause acidification and soil structure damage, which will also cause pollution when it enters the environment. Therefore, no matter what DCP medium is used, reuse should be considered as much as possible.…”