Highly effective reduction of fecal indicator bacteria counts in an ecologically engineered municipal wastewater and acid mine drainage passive co-treatment system

Winfrey, Brandon K.; Strosnider, William H.J.; Nairn, Robert W.; Strevett, Keith A.

doi:10.1016/j.ecoleng.2010.06.025

Cited by 37 publications

(23 citation statements)

References 43 publications

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“…Strosnider and Nairn 2010;84 Strosnider et al 2011a84 Strosnider et al , 2011b, with a view to implementing this approach at Potosí, Bolivia 85 (Strosnider and Nairn 2010). That work revealed that co-treatment with strongly acidic mine 86 waters enhances the disinfection of sewage effluent (Winfrey et al 2010), and results in impressive removal rates for BOD and phosphorous (Strosnider et al 2011b), and zinc (Strosnider et al 2013), albeit denitrification is apparently inhibited under the conditions studied (Strosnider et al 2011b). Several laboratory-based studies have examined alternative co-treatment options for mine water and sewage, including activated sludge techniques Gray 2012, 2013), and anaerobic digestion (Deng and Lin 2013).…”

mentioning

confidence: 99%

“…One potential issue is whether the high ionic strength of the mine water -and therefore the belend with sewage -might inhibit certain important microbial processes that are important in nutrient removal, particularly of NH 4 -N and PO 4 -P. For instance, the laboratory experiments of Strosnider et al (2011b) indicate potential inhibition of denitrification in blended mine water and sewage. In that case ionic strength was also high, but in addition the mine water was initially very acidic, and this is known to be deleterious to pathogens (Winfrey et al 2010), and thus possibly to other bacteria too. However, as previously noted, the mine waters treated at Lamesley are of neutral pH.…”

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confidence: 99%

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Synergistic wetland treatment of sewage and mine water: Pollutant removal performance of the first full-scale system

Younger

Henderson

2014

Water Research

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confidence: 99%

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confidence: 99%

Synergistic wetland treatment of sewage and mine water: Pollutant removal performance of the first full-scale system

Younger

Henderson

2014

Water Research

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“…Passive co-treatment of MWW and AMD in a multi-stage system consistently achieved high BOD and nutrient removal efficiency (Strosnider et al 2011b), removed significant concentrations of dissolved Al, As, Cd, Fe, Mn, Pb, and Zn, and produced a net-alkaline effluent (Strosnider et al 2011a). Other recent reports of passive co-treatment indicated that AMD enhanced coagulation, sedimentation, and pathogen removal during wastewater treatment (Neto et al 2010;Winfrey et al 2010). Johnson and Younger (2006) reported removal of Fe and Mn from net-alkaline coal mine AMD, as well as phosphate, nitrate, and suspended solids removal, in a wetland co-treating AMD with secondary sewage effluent.…”

Section: Introductionmentioning

confidence: 88%

Acute and Chronic Toxicity of Acid Mine Drainage to the Activated Sludge Process

Hughes

Gray

2012

Mine Water Environ

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The combined treatment of acid mine drainage (AMD) and municipal wastewater using the activated sludge process is an innovative approach to AMD remediation. The toxicity of synthetic AMD to activated sludge was evaluated using oxygen uptake rate (OUR) inhibition tests, which showed that activated sludge can withstand high proportions of AMD (EC 50 19-52% AMD by volume). The EC 50 values of municipal and industrial activated sludges were significantly different (p \ 0.05), with municipal sludges exhibiting higher tolerance to AMD. Although the EC 50 values for heterotrophic and nitrifying activated sludges were not statistically significantly different, the EC 50 values for heterotrophic bacteria were generally higher. Laboratory-based sequencing batch reactors were used to examine the treatability of AMD. Increased concentrations of COD and suspended solids, associated with turbidity and poor floc morphology, were observed in the final effluent after extended AMD loading. Protozoan community structure changed during the AMD loading period, and overall abundance tended to decrease over time. OUR decreased in the AMD-loaded reactors, particularly in the reactor receiving the highest AMD load, indicating reduced biomass activity over the acclimatization period. Results from OUR inhibition tests on the acclimatized activated sludge indicated that over a relatively short timescale (21 days), the activated sludge microbial community can adapt to AMD sufficiently so that shock loads of metals and acidity do not significantly inhibit OUR. These preliminary studies indicate that it is possible to treat AMD successfully in admixture with municipal wastewater using the activated sludge process.

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“…Techniques like the co-treatment of municipal wastewater (with biosolids as byproducts) and AMD has recently gained popularity following its introduction by Roetman [39], when it was proposed to remove pathogens in sewage [40]. Results from studies to date have shown the removal of metals, certain nutrients, increases in pH and alkalinity, and overall water/leachates quality improvements [41][42][43][44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Heterotrophic Microbial Stimulation through Biosolids Addition for Enhanced Acid Mine Drainage Control

Ogbughalu

Gerson²,

Qian

et al. 2017

Minerals

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Abstract:The effective control and treatment of acid mine drainage (AMD) from sulfide-containing mine wastes is of fundamental importance for current and future long-term sustainable and cost-effective mining industry operations, and for sustainable management of legacy AMD sites. Historically, AMD management has focused on the use of expensive neutralising chemicals to treat toxic leachates. Accordingly, there is a need to develop more cost-effective and efficient methods to prevent AMD at source. Laboratory kinetic leach column experiments, designed to mimic a sulfide-containing waste rock dump, were conducted to assess the potential of organic waste carbon supplements to stimulate heterotrophic microbial growth, and supress pyrite oxidation and AMD production. Microbiological results showed that the addition of biosolids was effective at maintaining high microbial heterotroph populations and preventing AMD generation over a period of 80 weeks, as verified by leachate chemistry and electron microscopy analyses. This research contributes to the ongoing development of a cost effective, multi-barrier geochemical-microbial control strategy for reduced mineral sulfide oxidation rates at source.

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Highly effective reduction of fecal indicator bacteria counts in an ecologically engineered municipal wastewater and acid mine drainage passive co-treatment system

Cited by 37 publications

References 43 publications

Synergistic wetland treatment of sewage and mine water: Pollutant removal performance of the first full-scale system

Synergistic wetland treatment of sewage and mine water: Pollutant removal performance of the first full-scale system

Acute and Chronic Toxicity of Acid Mine Drainage to the Activated Sludge Process

Heterotrophic Microbial Stimulation through Biosolids Addition for Enhanced Acid Mine Drainage Control

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