An overview of sulfidogenic biological reactors for the simultaneous treatment of sulfate and heavy metal rich wastewater
Autor: | M. Gopi Kiran, Gopal Das, Kannan Pakshirajan |
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Rok vydání: | 2017 |
Předmět: |
Waste management
Chemistry Precipitation (chemistry) Applied Mathematics General Chemical Engineering 0208 environmental biotechnology Heavy metals 02 engineering and technology General Chemistry 010501 environmental sciences Contamination 01 natural sciences Industrial and Manufacturing Engineering 020801 environmental engineering Metal chemistry.chemical_compound Wastewater visual_art visual_art.visual_art_medium Bioreactor Sulfate-reducing bacteria Sulfate 0105 earth and related environmental sciences |
Zdroj: | Chemical Engineering Science. 158:606-620 |
ISSN: | 0009-2509 |
DOI: | 10.1016/j.ces.2016.11.002 |
Popis: | 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. |
Databáze: | OpenAIRE |
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