制革废水剩余污泥中Cr^(3+)生物富集作用试验研究  

Experiment of Cr^(3+) bioaccumulation in residual sludge of tannery wastewater

作　　者：梁允[1] 买文宁[1] 杨峥[1] 谢付兵[1] 

机构地区：[1]郑州大学环境与水利学院,郑州450001

出　　处：《工业用水与废水》2007年第6期101-103,共3页Industrial Water & Wastewater

摘　　要：用麦麸和剩余污泥调配后,作为营养基质饲养驯化黄粉虫,对黄粉虫富集剩余污泥中Cr3+的最佳条件进行试验研究。结果表明:黄粉虫的富集作用显著受到温度、饲养密度和碳氮质量比交互作用的影响(p<0.05),在温度为30℃、饲养密度为0.4g/cm2、碳氮质量比为2.5的条件下富集效率最高,此时,饲养后黄粉虫体内Cr3+的质量浓度为0.87mg/kg,是原有Cr3+含量的7.25倍;饲养后剩余污泥中Cr3+的质量浓度为0.17mg/kg,约为新鲜污泥中Cr3+含量的1/5。Adjusting wheat bran and residual sludge as nutrition medium to breed and domesticate tenebrio molitor L, the optimal condition for tenebrio molitor L collecting Cr^3＋ in residual sludge was studied through the test. The results showed that： the bioaccumulation of tenebrio molitor L was affected by temperature, feeding density and carbon-nitrogen mass ratio very apparently （p 〈 0.05）. The bioaccumulation efficiency was the highest when the temperature was 30 ℃, the feeding density was 0.4 g/cm^2, the carbon-nitrogen mass ratio was 2.5, and under this condition, in the body of tenebrio molitor L after the breeding, the Cr^3＋ mass concentration was 0.87 mg/kg, which was 7.25 times that of the original Cr^3＋ content; the Cr^3＋ mass concentration in the residual sludge after the breeding was 0.17 mg/kg, which was about fivefold reduction of the mass concentration in fresh sludge.

关 键 词：制革废水 麦麸 剩余污泥 黄粉虫 三价铬离子 

分 类 号：X703.1[环境科学与工程—环境工程]