Effect of self-alkalization on nitrite accumulation in a high-rate denitrification system: Performance, microflora and enzymatic activities

Li, Wei; Shan, Xiaoyu; Wang, Zhiyao; Lin, Xiao-Yu; Li, Chenxu; Cai, Chaoyang; Abbas, Ghulam; Zhang, Meng; Shen, Li‐dong; Hu, Zhiqiang; Zhao, He-Ping; Zheng, Ping

doi:10.1016/j.watres.2015.11.003

Cited by 101 publications

(35 citation statements)

References 57 publications

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“…Comparison of performance between C/N = 4 and C/N = 2 at 1000 Ω The unique advantage and limitation of Cupriavidus sp. S1 are effective nitrogen removal at high C/N ratios (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28) and the substantial restriction of denitrification at low C/N ratios (≤ 4), respectively. Therefore, the low C/N ratio in the cathode chamber at first was controlled at two values (4 and 2) at the R ext of 1000 Ω. Nitrogen in the synthetic wastewater was in the form of NO − 3 -N at the beginning of each cycle.…”

Section: Resultsmentioning

confidence: 99%

“…One of the most widely used methods was external carbon addition . Small molecule organic compounds, such as methanol, acetic acid and glucose, can be easily degraded as carbon sources in the denitrification process . The addition of carbon source can improve the C/N ratio and promote effective denitrification .…”

Section: Introductionmentioning

confidence: 99%

“…12,14 Small molecule organic compounds, such as methanol, acetic acid and glucose, can be easily degraded as carbon sources in the denitrification process. 16 The addition of carbon source can improve the C/N ratio and promote effective denitrification. 17 However, the application was restricted because of huge purchasing costs, additional resource consumption and complex operation.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

Liu

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND An innovative microbial fuel cell (MFC) using Cupriavidus sp. S1 as the biocathode catalyst was developed to improve nitrogen removal from low carbon/nitrogen (C/N) wastewater. RESULTS The desirable external resistance was 100 Ω in this study, with an optimal total nitrogen (TN) removal efficiency of 95.71%, and a maximum current density and power density of 7583.89 ± 318.11 mA m−3 and 932 mW m−3 at C/N = 2, respectively, which initially confirmed the ability of Cupriavidus sp. S1 to obtain electrons from the electrode. The maximum tolerance of the system at Rext of 100 Ω was C/N = 1, with a TN removal efficiency of 90.87%. Compared with the open circuit, the TN removal increased by approximately 21.60% and 52.02% at C/N = 2 and 1, respectively, which expanded the application area for the dominant denitrifying bacteria S1. Additionally, the system exhibits the obvious merits of less sludge production, low energy consumption and the recovery of some energy. CONCLUSION Based on these results, domesticated Cupriavidus sp. S1 possesses electrochemical activity. Thus, the system has great potential for efficient and cost‐effective nitrogen removal from nitrate‐containing low C/N wastewater and energy recovery. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

Liu

et al. 2020

J of Chemical Tech & Biotech

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“…Proteobacteria and Bacteroidetes have be identified as the dominant phyla in the activated sludge generated during both municipal wastewater treatment and industrial wastewater treatment . Proteobacteria is regarded as one of the most widespread nitrification and denitrification phyla, and plays an important role in biological nitrogen and phosphorous removal as well as organic pollutant degradation . Bacteroidetes is another dominant and common phylum in the activated sludge of wastewater treatment plants (WWTPs), and is responsible for metabolizing carbohydrates and decomposing complex or refractory organic compounds .…”

Section: Introductionmentioning

confidence: 99%

Enhanced treatment of composite industrial wastewater using anaerobic‐anoxic‐oxic membrane bioreactor: performance, membrane fouling and microbial community

Wang

2019

J of Chemical Tech & Biotech

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BACKGROUND: A laboratory-scale anaerobic-anoxic-oxic membrane bioreactor (AAO-MBR) system was used to remove organic compounds and nitrogen in the composite industrial wastewater collected from an industrial park. RESULTS:The recommended conditions for both chemical oxygen demand (COD) and nitrogen removal were as follows: hydraulic retention time of 73.6 h, sludge retention time of 35 days and mixed liquor return ratio of 300%. Under this condition, COD and total nitrogen removal efficiencies were 89.4% and 77.7%, respectively. After treatment, most organic compounds were removed, but there were still a few refractory organic compounds in the final effluent, such as 2-hydroxydesmethylimipramine, 1-dichloromethyl-3-methyl-benzene and N-phenyl-2,3-dichloromaleimide. Compared to carbohydrates, proteins in the extracellular polymetric substances accumulated more easily on the membrane surface, resulting in the membrane fouling. Ternary analysis at the family level indicated that the bacteria Desulfuromonadaceae, Rikenellaceae, and Spirochaetaceae were dominant in the anaerobic sludge, and played an important role in hydrolysis and fermentation. The abundance distributions of Nitromonadaceae, Caldilineaceae and Xanthomonadales were above 50% in the anoxic sludge, and these bacteria played an important role in denitrification. CONCLUSION:The results can provide valuable information for optimizing the operation of the AAO-MBR system for the treatment of composite industrial wastewater. Industry the anaerobic, anoxic and oxic membrane bioreactor (O-MBR) tanks were taken from the anaerobic, anoxic and oxic tanks in the CWWTP, respectively. Experimental setup and operational conditionsThe setup and operation of the laboratory-scale AAO-MBR system was similar to the CWWTP, and its schematic diagram is also shown in Fig. S1. The working volumes of the anaerobic, anoxic and O-MBR systems were 13.3, 13.0 and 16.0 L, respectively. A sedimentation reactor with a working volume of 20.0 L was set between the anaerobic reactor and the anoxic reactorNitrogen removal NH 4 + -N removal by the AAO-MBR system during the entire operation period is shown in Fig. 1(b). The NH 4 + -N concentration in

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“…For example, it has been observed that up to 22.3% of the NO 3 − concentration in a methanol fed bioreactor accumulated as NO 2 − while increasing the pH up to 9.2. In contrast, at pH 7.6 the accumulation of NO 2 − was negligible (Li et al 2016b). Biological nitrogen removal in wetlands or reactive barriers functions by promoting denitrification processes in sediments or buried organic matter, respectively (Batty and Younger 2004).…”

Section: Introductionmentioning

confidence: 99%

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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Effect of self-alkalization on nitrite accumulation in a high-rate denitrification system: Performance, microflora and enzymatic activities

Cited by 101 publications

References 57 publications

Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

Enhanced treatment of composite industrial wastewater using anaerobic‐anoxic‐oxic membrane bioreactor: performance, membrane fouling and microbial community

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

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