Anaerobic Sulphate-Reducing Microbial Process Using Uasb Reactor for Heavy Metals Decontamination

Lima, Ana Cláudia Feitosa; Gonçalves, Maria Alice Rezende; Granato, Marcus; Leite, Selma Gomes Ferreira

doi:10.1080/09593332208618286

Cited by 22 publications

(16 citation statements)

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“…the Bauxsol process) (McConchie, 2003), sorption materials, such as ion-exchange resins, membranes, or biomassbased methods (e.g. Algasorb) (Prasad et al, 1999;Barnes, 1998;Lima et al, 2001), are a few of the examples already commercially available. Another new technique, that is being examined and that could be effective in arid zones, involves the reaction of metal-rich AMD with highly concentrated saline brines, which can neutralize the acid and allow the controlled precipitation of marketable metal salts (McConchie, 2003).…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Acid Mine Drainage Using Acidic Soil and Organic Wastes for Promoting Sulphate-Reducing Bacteria Activity on a Column Reactor

Costa

Duarte

2005

Water Air Soil Pollut

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Acid mine drainage (AMD) is a serious environmental problem resulting from extensive sulphide mining activities. The old copper mine of S. Domingos in Southeast Portugal is an example of such a situation. The abandoned open-pit from the mining operations resulted in the creation of a large pit lake with acidic water (pH∼2) and high contents of sulphate and heavy metals. Sulphatereducing biological processes have been studied as a remediation technology for this problem. A new application based on a simple and semi-continuous process for the treatment of S. Domingos AMD has been presented herein. Experiments using bench scale fixed-bed column bioreactors were carried out to evaluate the efficiency of the process. Sewage, anaerobic sludge and soil from the mining area were tested as solid matrices and/or inocula, as well as sources of complex organic substrates. The addition of lactose as a supplementary carbon source, easily available at zero cost or at negative cost in the effluents of the local cheese industries, was also tested. The data obtained indicate that it is possible to use the matrices tested for the production of sulphide by sulphate reduction, and that the regular addition of lactose is effective. Results showed that the process is efficient for the precipitation of the main dissolved metals, for the reduction in the sulphate content and, most importantly, for the neutralization of the AMD. Moreover, the use of soil as solid support also showed the possibility of using this process for the decontamination of both waters and soils.

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Section: Introductionmentioning

confidence: 99%

Bioremediation of Acid Mine Drainage Using Acidic Soil and Organic Wastes for Promoting Sulphate-Reducing Bacteria Activity on a Column Reactor

Costa

Duarte

2005

Water Air Soil Pollut

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“…In recent years several bioremediation processes based on the use of dissimilatory sulphate-reducing bacteria (DSRB) have been developed for the treatment of acid mine drainage (AMD) (Neculita et al 2007;Johnson and Hallberg 2005;Tabak and Govind 2003;Steed et al 2000) or other sulphate-rich effluents (Burgess and Stuetz 2002;Lima et al 2001). DSRB use sulphate as electron acceptor and an energy rich carbon source as electron donor (Pfenning et al 1981), generating sulphide.…”

Section: Introductionmentioning

confidence: 99%

Biological sulphate reduction using food industry wastes as carbon sources

et al. 2009

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Biological treatment with dissimilatory sulphate-reducing bacteria has been considered the most promising alternative for decontamination of sulphate rich effluents. These wastewaters are usually deficient in electron donors and require their external addition to achieve complete sulphate reduction. The aim of the present study was to investigate the possibility of using food industry wastes (a waste from the wine industry and cheese whey) as carbon sources for dissimilatory sulphate-reducing bacteria. The results show that these wastes can be efficiently used by these bacteria provided that calcite tailing is present as a neutralizing and buffer material. A 95 and 50 % sulphate reduction was achieved within 20 days of experiment by a consortium of dissimilatory sulphate-reducing bacteria grown on media containing waste from the wine industry or cheese whey respectively. Identification of the dissimilatory sulphate-reducing bacteria community using the dsr gene revealed the presence of the species Desulfovibrio fructosovorans, Desulfovibrio aminophilus and Desulfovibrio desulfuricans. The findings of the present study emphasise the potential of using wastes from the wine industry as carbon source for dissimilatory sulphate-reducing bacteria, combined with calcite tailing, in the development of cost effective and environmentally friendly bioremediation processes.

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“…(Coates et al, 1996;Wielinga et al, 2001). Heavy metals in up-flow anaerobic sludge bed (UASB) reactors are often precipitated by sulphide produced by sulphate biological reduction, which enables the simultaneous removal of heavy metal, sulphate, and organic pollutants (De Lima et al, 2001;Sierra-Alvarez et al, 2006).…”

Section: Indirect Enzymatic Reductionmentioning

confidence: 99%