摘要
采用间歇试验,研究了偶氮二异丁腈(AIBN)生产污水中氰化物对厌氧生物处理的抑制及其去除方法。结果表明,在pH值=6、Fe^(2+)投加量为理论投加量的2.5倍、反应时间为30min时,Fe^(2+)可去除AIBN污水中94%以上的总氰。AIBN生产污水中大量的CN^-对厌氧生物处理毒性很大。当培养瓶中总氰浓度约为10.1 mg/L时,厌氧最大比产甲烷速率(MSMR)下降50%以上。当培养瓶中总氰浓度为5.3和10.1 mg/L时,脱氢酶活性分别降低了17%和40%。脱氢酶活性降低直接导致污泥产甲烷速率减小。厌氧生物受氰化物驯化后,当污泥最大比产甲烷速率下降50%时,对总氰的去除率为58%,对COD的去除率达到65%。
Batch reactors were adopted to study the inhibition of total cyanide to anaerobic biological treatment and its removal from azobisisobutyronitrile （AIBN） wastewater. The results showed that over 94% of total cyanide could be removed by Fe^2＋ when pH was 6, dosage of Fe^2＋ was 2.5 times of the theoretical amount, and reaction time was 30 min. Massive cyanide ion was very toxic to anaerobic biological treatment. The maximum specific methanogenic rate （MSMR） decreased by over 50% when the total cyanide concentration was 10.1 mg/L. The dehydrogenase activity decreased by 17% and 40% when the total cyanide concentration was 5.3 mg/L and 10.1 mg/L respectively in the incubation bottles. The reduction in dehydrogenase activity directly decreased MSMR. The removal rates of total cyanide and COD were 58% and 65% respectively after acclimation of anaerobic treatment with cyanide, even if MSMR decreased by 50%.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第9期103-106,共4页
China Water & Wastewater
基金
福建省高校产学合作计划重大项目(2016H6003)
关键词
偶氮二异丁腈
厌氧生物处理
最大比产甲烷速率
总氰
azobisisobutyronitrile （AIBN）
anaerobic biological treatment
maximum specific methanogenic rate （MSMR）
total cyanide
