生物沥浸法去除畜禽粪便中重金属的影响因素研究  

Factors Affecting Bioleaching of Heavy Metals From Animal Excrement

作　　者：杨慧敏[1,2] 李明华[3] 王凯军[2] 常丽春[4] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]清华大学环境科学与工程系,北京100084 [3]申克(天津)工业技术有限公司北京办事处,北京100004 [4]北京市环境保护科学研究院,北京100037

出　　处：《生态与农村环境学报》2010年第1期73-77,共5页Journal of Ecology and Rural Environment

基　　金：国家高技术研究发展计划(2007AA06Z345)

摘　　要：研究了粪液固体浓度和硫细菌混合菌液接种量对猪粪中重金属生物沥浸的影响。结果表明，猪粪固体浓度越低，重金属沥浸周期越短，沥浸效果越好。从沥浸效果和经济效益2方面综合考虑，固体质量浓度采用70～100g·L^-1较为合适。接种量也是影响生物沥浸的重要因素，试验结果表明，接种量越大，生物沥浸速度越快，但接种量小的粪样只需适当延长沥浸时间即可达到较高的重金属去除效果，2％接种量的猪粪沥浸14d时，Cu、Zn和Cd沥出率可分别达到76．9％、75．2％和47．8％。从经济角度考虑，接种量采用2％即可满足生物沥浸的需要。Effects of concentration of solids in liquid manure and amount of mixed sulfur bacteria liquid inoculated on bioleaching of heavy metals from pig manure were studied. Results indicate that the lower the concentration of solids in liquid manure, the shorter the heavy metal bioleaching cycle and the better the heavy metal removing efficiency. Based on the overall consideration of both bioleaching effect and economic benefit, it is appropriate to have the concentration of solids in liquid manure be kept at 70-100 g · L^-1. Inoculation rate is also an important factor. Results show that the higher the inoculation rate, the higher the bioleaching rate. However, in pig manure with lower inoculation rate, longer leaching time could lead to higher removal efficiency. In pig manure with 2% in inoculation rate and 14 days＇ of leaching, Cu, Zn and Cd removed by 76. 9%, 75.2% and 47. 8%, respectively. From economic aspect, the inoculation rate of 2% is adequate to meet the need of bioleaehiug.

关 键 词：生物沥浸 重金属 固体浓度 接种量 猪粪 硫细菌 

分 类 号：X713[环境科学与工程—环境工程]