Performance of sulfidogenic anaerobic baffled reactor (ABR) treating acidic and zinc-containing wastewater

Biotreatment of acidic zinc- and copper-containing wastewater using ethanol-fed sulfidogenic anaerobic baffled reactor

“…2 and 3, respectively. The reactor started with 65% sulfate reduction and 80% COD removal without any lag period due to the fact that the reactor was fed with a lactate containing synthetic wastewater for more than 300 days in a previous study [11]. During the electron donor change from lactate to ethanol, high sulfate reduction and COD removal efficiencies were observed and hence the electron donor change did not adversely affect the system performance, similar to the study of Kaksonen et al [7].…”

“…1) previously fed with lactate and synthetic AMD for around 300 days [11] was used in the present study. Reactor was divided into four equal 5-L compartments by vertical baffles, each compartment having down-comer and riser regions created by further vertical baffle.…”

“…Hence, ABR is an attractive reactor configuration for metal-containing wastewater treatment and metal recovery. Although several studies have shown that ABR is very effective in anaerobic wastewater treatment and biomass granulation [14][15][16], limited information is available on the potential of ABR for the treatment of AMD and metal recovery [11]. In this context, the present study aims at evaluating the potential of ethanol-fed sulfidogenic ABR in the treatment of Zn-and Cu-containing AMD and metal recovery.…”

“…Some SRB oxidize organic substrates completely to CO 2 , while others incompletely to acetate [10]. It is well known that acetate may accumulate in the reactor at high loadings, which may decrease the sulfide and alkalinity productions [6][7][8]11]. Hence, in the case of ethanol supplementation, the loading rate should be carefully adjusted not to accumulate acetate and cease alkalinity production:…”

Removal of Sulphate and Manganese on Synthetic Wastewater in Sulphate Reducing Bioreactor Using Indonesian Natural Zeolite

“…These reactors contain sulphate reducing bacteria (SRB) that have the ability to reduce sulphate to sulphide and then this sulphide reacts with certain metals dissolved, such as manganese, copper, iron and zinc, forming insoluble precipitates [1]. Numerous reactor designs for microbial sulphate reduction have been reported [4][5][6][7][8]. The applying of those reactor designs have also been reported to be used for the treatment of industrial effluents, particularly from acid mine drainage (AMD) [9][10][11][12].…”