An overview of sulfidogenic biological reactors for the simultaneous treatment of sulfate and heavy metal rich wastewater

详细信息    查看全文

• 作者：M. Gopi Kiran^a ; Kannan Pakshirajan^a ; ^b ; ^{pakshi@iitg.ernet.in} ; Gopal Das^a ; ^c
• 关键词：SRB ; sulfate reducing bacteria ; AMD ; acid mine drainage ; HRT ; hydraulic retention time ; AFR ; anaerobic filter reactors ; UASB ; upflow anaerobic sludge blanket reactor ; FBR ; fluidized bed reactor ; DFBR ; downflow fluidized bed reactor ; IFBR ; inverse fluidized bed reactor ; AHR ; anaerobic hybrid reactor ; ABR ; anaerobic baffled reactor ; CSTR ; continuously stirred tank reactor ; SRT ; sludge retention time ; ACP ; anaerobic contact process ; AFR ; anaerobic fixed film reactors ; DSFF ; down flow stationary fix
• 刊名：Chemical Engineering Science
• 出版年：2017
• 出版时间：2 February 2017
• 年：2017
• 卷：158
• 期：Complete
• 页码：606-620
• 全文大小：1001 K
• 卷排序：158

文摘

Microbial precipitation of heavy metals by sulfate reducing bacteria (SRB) through sulfate reduction as corresponding sulfides is being seen as a promising technique for the treatment of metal contaminated wastewater. SRB based bioprocesses are more attractive compared with chemical process owing to their low cost, very high removal and recovery of metals even at low initial concentration from wastewater. Both passive and active biological treatment systems are regarded as the most promising and potential treatment systems for a wide variety of metallic wastewater. These bioreactor systems offer more compact design, ease of performance and efficient control. However, there is limited information available on sulfidogenic bioreactors in the literature for a better understanding of the treatment system involving SRB. This is particularly important for scaling up of the potential of these systems. Hence, in this article, the highlights of different reactors (passive and active) used for treating sulfate and metal containing wastewater, factors affecting the process parameters, effect of different electron donors, merits and demerits of various reactors are emphasized.