摘要
水合氧化铁(HFO)被用于评价污水污泥厌氧消化过程的原位固硫潜力.在20d内,添加0.05%、0.10%和0.25%(wt)的HFO,使生物气中H_2S浓度成功地从219.9(或者富硫酸盐污泥3263)mg/m^3,分别降低至74.61(1537)、12.84(229)和1.06(3.3)mg/m^3.添加0.05%、0.10%和0.25%(wt)的HFO,使污泥生物可利用磷比例从70.1%显著降低至41.7%、20.5%和6.9%.污泥磷形态和XRD分析表明部分生物可利用磷(BAP)被固定为Fe_3(PO_4)_2.结合挥发性物质(VM)分析,认为HFO可减缓污泥的稳定化进程,而这可部分归因于溶解性磷缺乏.还原性无机硫(RIS)的形态分析表明FeS_2和单质硫是HFO与硫化物的主要反应产物.
The potential of ferrihydrite(HFO)for in-situ removal of hydrogen sulphide during sewage sludge anaerobic digestion was evaluated.Within20days,the average hydrogen sulphide concentration in biogas was successfully decreased from219.9(or3263of sulphate-rich sludge)mg/m3to74.61(1537),12.84(229)and1.06(3.3)mg/m3in the presence of0.05%,0.10%and0.25%(wt)HFO,respectively.The bioavailable fraction of the total P was decreased from70.1%to41.7%,20.5%and6.9%.The analysis of XRD and phosphorus fractionation profile confirmed the immobilization of bioavailable-P mainly as Fe3(PO4)2in HFO-dosed sludge.According to the data of volatile matters(VM),sludge stabilization might be prolonged in the presence of HFO due to soluble phosphorus limitation partly.The reduced inorganic sulphur(RIS)fractionation profile further indicated that FeS2and S0are the main reaction products of sulphide and HFO.
作者
苏良湖
张明珠
张龙江
甄广印
柴晓利
赵由才
SU Liang-hu;ZHANG Ming-zhu;ZHANG Long-jiang;ZHEN Guang-yin;CHAI Xiao-li;ZHAO You-cai(Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection, Nanjing 210042, China;State Key laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China;Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan)
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2017年第4期1349-1357,共9页
China Environmental Science
基金
国家国际科技合作专项(2015DFA91390)
环保部南京环境科学研究所中央级公益性科研院所基本科研业务专项(20160301)
上海市科委重大科技项目(10DZ1200104)
关键词
污水污泥
水合氧化铁
硫化氢
厌氧消化
甲烷
sewage sludge
hydrous ferric oxide
hydrogen sulfide
anaerobic digestion
methane
