【摘要】 以广州市城市污泥作为培养介质,利用以硫代硫酸钠作为生长基质进行生命活动的氧化亚铁硫杆菌(T.f)和氧化硫硫杆菌(T.t)来淋滤去除污泥中的重金属,研究了不同底物含量及不同驯化污泥接菌量对重金属去除效果的影响。结果表明,在无驯化污泥接种的条件下,最佳基质投配率为10g·L-1;驯化污泥接种培养可以缩短污泥的酸化周期,并且在相同投配比条件下,接种培养较不接种培养的去除效果明显提高。驯化污泥接种量为10%、投配比为7g·L-1时,污泥中主要超标元素Cu、Zn、Cd和Ni的去除率分别达到67.2%,88.9%,82.4%和68.4%。同时,处理后污泥中的重金属含量可满足污泥农用的国家标准。更多还原

【Abstract】 Sewage sludge and sodium thiosulfate were adopted as culture medium and substrate to cultivate Thiobacillus ferrooxi-dans(T.f) and Thiobacillus thiooxidans(T.t) for heavy metal removal in the present study. The efficiency of various substrate dosage rate and inoculation rate of acclimated sludge were studied. The results showed that the optimum dosage rate of sodium thiosulfate was 10 g·L-1 without inoculation. While with inoculation, the acidification periods were shortened and removal rate could also be improved obviously. Under the conditions of 10% inoculation and 7 g·L-1 dosage rate, removal rate of Cu, Zn, Cd and Ni was 67.2%, 88.9%, 82.4% and 68.4% respectively. And the metal contents in the treated sludge could meet Chinese quality standards for sludge agricultural application.更多还原