Effect of toxic substances in anaerobic treatment of tannery wastewaters

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• 作者：K. Vijayaraghavan and D. V. S. Murthy
• 刊名：Bioprocess and Biosystems Engineering
• 出版年：1997
• 出版时间：February 1997
• 年：1997
• 卷：16
• 期：3
• 页码：151-155
• 全文大小：199 KB

文摘

Studies were carried out in the treatment of tannery wastewater using upflow anaerobic contact filter (reactor) and on the role of toxic substances viz tannin, sulphide, chromium (3+) in inhibiting the performance of the reactor. The influent COD concentration was varied in the range of 1500 to 16500rmg/l, at different hydraulic retention times viz 36,48,60 hr. The limiting concentrations of toxicity for the three substances viz tannin, sulphide, chromium (3+) were identified in terms of the performance of the reactor viz COD removal percent, biogas production etc. Toxic limits of the above mentioned substances were further estimated in batch process (in vials) to supplement the evidence. In anaerobic contact filter tannin beyond 914rmg/l inhibited the performance, whereas sulphide concentration even upto 180rmg/l and chromium (3+) concentration even upto 140rmg/l did not affect the reactor performance. In batch process tannin above 77 wt. % affected the anaerobic microbial growth. Hydrolysable tannin was present in these tannery wastewaters.