Effect of feed concentration and hydraulic retention time on removal of phenol, thiocyanate, and nitrate–nitrogen in anoxic-fed batch moving bed reactor

Sahariah, Biju Prava; Chakraborty, Saswati

doi:10.1080/02772248.2012.727817

Cited by 9 publications

(6 citation statements)

References 34 publications

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“…This would hypothetically nitrify the produced NH 4 + followed by anaerobic denitrification of produced NO 3 − . The room temperature SCN − and NO 3 − removal rates were comparable to a published study carried out at mesophilic temperatures (Sahariah and Chakraborty 2012) but additionally, we report efficient SCN − and NO 3 − removal at temperatures typical for the boreal climate (15 and 10 °C) and a pH typical for mining wastewaters (Table 3). …”

Section: Discussionsupporting

confidence: 89%

“…4 in Supplemental File 7). Removal of SCN − in conjunction with NO 3 − reduction has been observed previously with the use of biomaterial from a biogas plant (Sahariah and Chakraborty 2012 ), while dissimilatory nitrate reduction into ammonia has previously been observed in an industrial system operated at 22–28 °C (Villemur et al 2015 ). The diverse microbial community attached to the biofilm carriers became dominated by Flavobacterium -like and Thiobacillus -like OTUs (related to T. denitrificans ; Fig.…”

Section: Discussionmentioning

confidence: 56%

“… One study was found that also measured NO 3 − in both the influent and bioreactor and is presented in the table as a comparison 1 Sahariah and Chakraborty ( 2012 ) * Data not available …”

Section: Discussionmentioning

confidence: 99%

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Low temperature, autotrophic microbial denitrification using thiosulfate or thiocyanate as electron donor

Broman

Jawad

et al. 2017

Biodegradation

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Wastewaters generated during mining and processing of metal sulfide ores are often acidic (pH < 3) and can contain significant concentrations of nitrate, nitrite, and ammonium from nitrogen based explosives. In addition, wastewaters from sulfide ore treatment plants and tailings ponds typically contain large amounts of inorganic sulfur compounds, such as thiosulfate and tetrathionate. Release of these wastewaters can lead to environmental acidification as well as an increase in nutrients (eutrophication) and compounds that are potentially toxic to humans and animals. Waters from cyanidation plants for gold extraction will often conjointly include toxic, sulfur containing thiocyanate. More stringent regulatory limits on the release of mining wastes containing compounds such as inorganic sulfur compounds, nitrate, and thiocyanate, along the need to increase production from sulfide mineral mining calls for low cost techniques to remove these pollutants under ambient temperatures (approximately 8 °C). In this study, we used both aerobic and anaerobic continuous cultures to successfully couple inorganic sulfur compound (i.e. thiosulfate and thiocyanate) oxidation for the removal of nitrogenous compounds under neutral to acidic pH at the low temperatures typical for boreal climates. Furthermore, the development of the respective microbial communities was identified over time by DNA sequencing, and found to contain a consortium including populations aligning within Flavobacterium, Thiobacillus, and Comamonadaceae lineages. This is the first study to remediate mining waste waters by coupling autotrophic thiocyanate oxidation to nitrate reduction at low temperatures and acidic pH by means of an identified microbial community.Electronic supplementary materialThe online version of this article (doi:10.1007/s10532-017-9796-7) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 56%

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Low temperature, autotrophic microbial denitrification using thiosulfate or thiocyanate as electron donor

Broman

Jawad

et al. 2017

Biodegradation

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“…Likewise, the phenol consumed was mainly mineralized through the denitrifying respiratory process, as Y HCO − 3 values were higher than 0.60. The oxidation of phenol linked to denitrification has been previously reported in the literature (Beristain-Cardoso et al 2009;Sahariah and Chakraborty 2012). In the present work, it was observed that the denitrifying metabolic pathway was not influenced in spite of using an excess of phenol as reducing source, as Y N 2 values remained close to 1.…”

Section: Assays With Phenol In the Absence And Presence Of 2-chlorophsupporting

confidence: 78%

Physiologic impact of 2-chlorophenol on denitrification process in mixture with different electron sources

et al. 2019

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The aim of this study was to evaluate the physiologic behavior of sludge in the absence and presence of 2-chlorophenol (2-CP) with different electron donors (phenol, glucose, and acetate) during denitrification process. In batch assays with phenol in the presence of 2-CP, a significant decrease of phenol consumption efficiencies (E phenol) up to 99% was observed regarding the cultures without 2-CP. However, in most of the cases, nitrate consumption efficiencies (E NO − 3), and yields of nitrogen gas (Y N 2) and bicarbonate (Y HCO − 3) were high, showing that the denitrifying respiratory process successfully occurred with phenol and 2-CP. The specific consumption rates of nitrate (q NO − 3) and phenol (q phenol) decreased up to 6.0 and 32.3 times, respectively. In assays with glucose in the presence of 2-CP, the denitrifying performance was not significantly altered in terms of efficiencies and product yields; however, q NO − 3 was up to 1.6 times smaller than that obtained without 2-CP whereas q glucose was increased up to 1.17 times. In assays with acetate plus 2-CP, the E NO − 3 , E acetate , and Y N 2 values remained high but 2-CP caused a decrease in Y HCO − 3. Moreover, q NO − 3 and q acetate increased up to 1.4 and 2.0 times, respectively. These results show that the negative or positive effects of 2-CP on denitrification process depend on the type and concentration of electron source. The obtained physiologic and kinetic information might be useful to define strategies to maintain successful denitrification processes in wastewater treatment bioreactors fed with 2-CP.

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“…Instead, other molecules of nitrate and sulfate act as electron acceptors for the oxidation of pollutant, while converting to their elemental forms. For example, if nitrate is used as an electron acceptor in an anoxic process for MT treatment with a high organic load, denitrifying microbes oxidize the organic pollutants using them as electron donors and the final products are molecular nitrogen gas, carbon dioxide, and water (Sahariah and Chakraborty, 2012). For metals, anoxic processes can be adopted to achieve precipitation at different state changes and avoid the toxicity increase that may occur due to ionic changes.…”

Section: Factors Influencing Treatmentmentioning

confidence: 99%

Bioremediation techniques for the treatment of mine tailings: A review

2022

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Effect of feed concentration and hydraulic retention time on removal of phenol, thiocyanate, and nitrate–nitrogen in anoxic-fed batch moving bed reactor

Cited by 9 publications

References 34 publications

Low temperature, autotrophic microbial denitrification using thiosulfate or thiocyanate as electron donor

Low temperature, autotrophic microbial denitrification using thiosulfate or thiocyanate as electron donor

Physiologic impact of 2-chlorophenol on denitrification process in mixture with different electron sources

Bioremediation techniques for the treatment of mine tailings: A review

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