摘要
以硫酸亚铁盐为能源物质,采用9K液体培养基培养,继以9K固体培养基平板接种法直接从污泥中分离出一株嗜酸性氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans,T.f)菌株.利用该菌株作为沥滤微生物,对5种不同浓度的城市污泥中重金属进行生物沥浸试验.结果表明,生物沥浸的污泥浓度宜控制在2%(w/w),沥滤12 d后,污泥中Zn、Cu、Pb、Cr的去除率可分别达到99.57%,94.97%,36.95%,43.40%.
A technologically and economically feasible process called bioleaching was used for the removal of heavy metals from sewage sludge by Acidithiobacillus ferrooxidans,and the effects of sludge solids concentration on the bioleaching process were examined.Laboratory results showed that 99.57% Zn,94.97% Cu,59.50% Pb and 43.40% Cr could be removed from sewage sludge by the bioleaching experiment after 12 days at 2%（w/w） solids concentration.Due to the buffering capacity of sludge solids,the rates of pH reduction,ORP rise and metal solubilization were reduced with the increase of the solids concentration.The results also indicated that,among the five solids concentration tested（2%,4%,6%,8% and 10%）,the concentration at 2% was found to be best to bacterial activity and metal solubilization under the chosen experimental conditions.
出处
《亚热带资源与环境学报》
2010年第2期62-68,共7页
Journal of Subtropical Resources and Environment
基金
福建师范大学闽江学者人才引进基金项目(2006)
福建省教育委员会课题(JB03136)
