Kumar M Suresh, Mishra Ram Sushil, Jadhav Shilpa V, Vaidya A N, Chakrabarti T
Solid and Hazardous Waste Management Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur--440 020, India.
J Environ Sci Eng. 2011 Jul;53(3):277-80.
Coal coking, precious metals mining and nitrile polymer industries generate over several billion liters of cyanide-containing waste annually. Economic and environmental considerations make biological technologies attractive for treatment of wastes containing high organic content, in which the microbial cultures can remove concentrations of organics and cyanide simultaneously. For cyanide and phenol bearing waste treatment, an upflow anaerobic sludge blanket reactor has been developed, which successfully removed free cyanide 98% (with feed concentration of 20 mg 1(-1)) in presence of phenol. The effect of cyanide on phenol degradation was studied with varying concentrations of phenol as well as cyanide under anaerobic conditions. This study revealed that the methanogenic degradation of phenol can occur in the presence of cyanide concentration 30-38 mg 1(-1). Higher cyanide concentration inhibited the phenol degradation rate. The inhibition constant Ki was found to be 38 mg 1(-1) with phenol removal rate of 9.09 mg 1(-1.) x h.
煤炭焦化、贵金属开采和腈类聚合物行业每年产生数十亿升含氰废物。出于经济和环境方面的考虑，生物技术对于处理含有高有机成分的废物具有吸引力，其中微生物培养物可以同时去除有机物和氰化物的浓度。对于含氰和苯酚的废物处理，已开发出一种上流式厌氧污泥床反应器，在苯酚存在的情况下，该反应器成功去除了98%的游离氰化物（进料浓度为20毫克/升）。在厌氧条件下，研究了不同浓度的苯酚和氰化物对氰化物对苯酚降解的影响。该研究表明，在氰化物浓度为30 - 38毫克/升的情况下，苯酚的产甲烷降解可以发生。较高的氰化物浓度抑制了苯酚的降解速率。发现抑制常数Ki为38毫克/升，苯酚去除率为9.09毫克/升·小时。
