Calcium effect on anaerobic biological treatment of fresh leachate with extreme high calcium concentration
Calcium effect on anaerobic biological treatment of fresh leachate with extreme high calcium concentration
复制标题
钙对超高钙浓度新鲜渗滤液厌氧生物处理的影响
DOI：
10.1016/j.ibiod.2014.05.016
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发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
Sun Dezhi
中科院分区：
文献类型：
--
作者：
Liu Zhao;Qiu Bin;Fang Yilong;Sun Dezhi
我国城市生活垃圾焚烧厂新鲜渗滤液中钙的含量很高，会降低微生物的生物活性，导致颗粒中钙的沉淀。通过72 h静态试验研究了高浓度钙对无钙沉淀厌氧颗粒污泥的影响，并在实验室规模的膨胀颗粒污泥床（EGSB）反应器中进行了132 d钙沉淀厌氧生物处理新鲜渗滤液的试验研究。结果表明，静态试验和EGSB反应器运行试验结果表明，厌氧颗粒污泥钙浓度的抑制阈值均为5000 mg/L。厌氧颗粒污泥中钙的沉淀是一个逐渐形成的过程，主要以碳酸钙方解石的形式存在。与钙沉淀相比，高钙浓度是导致处理过程中COD去除率下降的主要原因。当Ca ~（2+）浓度超过5000 mg/L时，只有少数微生物存活，主要集中在细菌的梭菌和古细菌的甲烷菌中。
Fresh leachate from municipal solid waste (MSW) incineration plant in China always contains extremely high concentration of calcium which would reduce the bioactivity of microorganisms and lead to calcium precipitation in granules. This paper investigated the effect of high concentration of calcium on anaerobic granular sludge without calcium precipitation by static tests for 72 h, and on anaerobic bio-treatment process for treating fresh leachate in a laboratory-scale expanded granular sludge bed (EGSB) reactor with calcium precipitation for 132 d. The results showed that, suppression thresholds of calcium concentration for anaerobic granular sludge were 5000 mg/L from both static tests and EGSB reactor operation. Calcium precipitation in anaerobic granules was a gradual formation process, mainly in the form of calcium carbonate calcite. Compared with calcium precipitation, high calcium concentration was mainly responsible for the decrease of COD removal efficiency in treatment process. Only a few microorganisms survived when calcium concentration increased over 5000 mg/L, which was mainly concentrated inClostridiumof bacteria andMethanosaetaof archaea.
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影响因子：
12.8
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