摘要
在污泥生物沥滤过程中,需要以H_(2)S、单质S和FeSO4作为营养底物。通入H_(2)S后,通过测定污泥pH、含固率、铁含量在生物沥滤过程中的变化,研究了H_(2)S对生物沥滤的影响。结果表明,间歇性通入不同量的H_(2)S会对生物沥滤进程有不同的影响。适量的H_(2)S对生物沥滤有促进作用,过量的H_(2)S会使生物沥滤无法进行;不同通气条件下,污泥含固率升高速率和反应结束时Fe^(2+)含量不同,通气1.5 h时,含固率平均升高速率最大,反应结束时Fe^(2+)质量浓度最高,总铁最低质量浓度高于其他通气条件。通过EDS分析可知,通气后污泥中的S和重金属含量增加,Fe含量减少。
Hydrogen sulfide,elemental sulfur and ferrous sulfate are needed as nutrient substrates during bioleaching of sludge.After the aeration of hydrogen sulfide,the changes of sludge p H,solid content and iron content during bioleaching are determined,and the impact of hydrogen sulfide on bioleaching is studied.It is shown that intermittent aeration with different amounts of hydrogen sulfide has different effects on the bioleaching process.Appropriate amount of hydrogen sulfide can promote bioleaching,but excessive hydrogen sulfide can hinder bioleaching.When aeration has carried out for 1.5 h,the average increasing rate of solid content reaches the largest.At the end of reaction,Fe^(2+)concentration reaches the highest and total iron concentration is higher than that under other aeration conditions.According to EDS analysis,the contents of sulfur and heavy metals in sludge increase and the content of iron decreases after aeration.
作者
张聪政
张弛
常占坤
ZHANG Cong-zheng;ZHANG Chi;CHANG Zhan-kun(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China)
出处
《现代化工》
CAS
CSCD
北大核心
2021年第S01期249-255,共7页
Modern Chemical Industry
基金
垃圾提取腐殖质与污泥协同堆肥示范研究(RD2000001783)
关键词
生物沥滤
H_(2)S
污泥
含固率
营养底物
bioleaching
hydrogen sulfide
sludge
solid content
nutrient substrate
