重金属对猪场废水厌氧消化蓄积抑制  

Cumulative inhibition of heavy metals to anaerobic digestion of piggery wastewater

作　　者：孙建平[1,2] 郑平[1] 胡宝兰[1] 余燚[1] 

机构地区：[1]浙江大学环境工程系,杭州310029 [2]浙江树人大学生物与环境工程学院,杭州310015

出　　处：《环境科学学报》2009年第8期1643-1648,共6页Acta Scientiae Circumstantiae

基　　金：浙江省科技厅重大科技攻关项目(No. 2005C13004)~~

摘　　要：为了探明重金属离子在猪场废水厌氧消化中的蓄积抑制作用,用急性抑制试验法和蓄积抑制试验法,研究了Cu2+、Zn2+、Cr3+对厌氧消化的半抑制浓度和蓄积特性.结果表明,Cu2+、Zn2+、Cr3+对厌氧消化的半抑制浓度分别为1.26、1.79和2.10mg·g-1(以VSS计),当Cu2+、Zn2+、Cr3+的浓度分别累积到1.92mg·g-1,0.96mg·g-1和2.24mg·g-1(以VSS计)时,甲烷产生速率被抑制50%,说明Zn2+属于高度蓄积,Cu2+和Cr3+为明显蓄积.In acute toxicity tests, the half maximal inhibitory concentrations （ IC50 ） of Cu^2＋ , Zn^2＋ , and Cr^3＋ on anaerobic digestion of piggery wastewater were 1.26 mg·g^-1 , 1.79 mg·g^-1, and 2.10 mg·g^-1, respectively （ based on volatile suspended solids, VSS）. Chronic toxicity tests showed that the methane production rate was reduced by 50% when the concentrations of Cu^2＋ , Zn^2＋ , and Cr^3＋ were 1.92 mg·g^-1 , 0.96 mg·g^-1 and 2.24 mg·g^-1 respectively （ based on VSS）, which indicated that the inhibitory effect of Zn^2＋ was highly accumulated, and the inhibitory effects of Cu^2＋ and Cr^3＋ were distinctly accumulated.

关 键 词：重金属 厌氧消化 急性毒性 蓄积抑制 

分 类 号：X703.1[环境科学与工程—环境工程]