CAJ | 학술논문

以溶解氧（DO）突变为活性污泥中毒的预警指标，研究Cu2＋、Cr6＋、Pb2＋、As5＋4种重金属对活性污泥的毒性，并对预警活性污泥重金属中毒的测试参数进行优化。结果表明在相同的反应条件和重金属浓度（15 mg/L）下，4种重金属抑制活性污泥活性导致DO突变量分别为0．87、0．6、0．4和0．75 mg/L，其顺序为Cu2＋＞ As5＋＞ Cr6＋＞ Pb2＋，活性污泥对重金属铜中毒更加敏感。当As5＋和Cr6＋浓度由3 mg/L提高至15 mg/L时，活性污泥的DO突变量分别由0．32和0．27 mg/L上升至0．75和0．53 mg/L，表明随进水中As5＋、Cr6＋浓度增加，对活性污泥抑制性越强，存在剂量效应关系，因此溶解氧突变可作为活性污泥重金属离子中毒的判别指标，快速预警污水处理厂进水重金属引发活性污泥中毒与否，为污水处理厂稳定运行提供技术支持。
이용해양（DO）돌변위활성오니중독적예경지표，연구Cu2＋、Cr6＋、Pb2＋、As5＋4충중금속대활성오니적독성，병대예경활성오니중금속중독적측시삼수진행우화。결과표명재상동적반응조건화중금속농도（15 mg/L）하，4충중금속억제활성오니활성도치DO돌변량분별위0．87、0．6、0．4화0．75 mg/L，기순서위Cu2＋＞ As5＋＞ Cr6＋＞ Pb2＋，활성오니대중금속동중독경가민감。당As5＋화Cr6＋농도유3 mg/L제고지15 mg/L시，활성오니적DO돌변량분별유0．32화0．27 mg/L상승지0．75화0．53 mg/L，표명수진수중As5＋、Cr6＋농도증가，대활성오니억제성월강，존재제량효응관계，인차용해양돌변가작위활성오니중금속리자중독적판별지표，쾌속예경오수처리엄진수중금속인발활성오니중독여부，위오수처리엄은정운행제공기술지지。
The early warning of activated sludge poisoned by heavy metals as Cu2+,Cr6+,Pb2+and As5+ was studied with dissolved oxygen mutation index. The parameters of early warning of activated sludge poisoning were optimized. With a certain condition and common dosage of heavy metals (15 mg/L),the dissolved oxygen mutation by these heavy metals are 0. 87,0. 6,0. 4 and 0. 75 mg/L,which indicates the biological inhibition order is Cu2+ >As5+ >Cr6+ >Pb2+. When concentrations of As5+and Cr6+ increase from 3 mg/L to 15 mg/L,the dissolved oxygen mutations increase from 0. 32,0. 27 mg/L up to 0. 75 and 0. 53 mg/L,respectively. With a rising dosage of heavy metals,the activated sludge ’s poison measured by dissolved oxygen mutation index is enhanced. Thus,the dissolved oxygen mutation index can be used as early warning of the activated sludge poisoned by heavy metals in wastewater treatment plant.