Mainstream short-cut N removal modelling: current status and
Deammonification short-cuts the conventional N removal pathway by directly converting ammonium (NH 4 +-N) to nitrogen gas (N 2) via nitrite (NO 2 −-N).The …Web
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Deammonification short-cuts the conventional N removal pathway by directly converting ammonium (NH 4 +-N) to nitrogen gas (N 2) via nitrite (NO 2 −-N).The …Web
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Most previous studies have primarily been single-factor experiments, but simultaneous changes in multiple environmental factors may impact nitrogen removal efficiency (Su et al., 2015). The conventional approach of assessing one factor at a time is not appropriate for this particular bioprocess due to potential interactions between …Web
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Request PDF | On May 31, 2015, Qian Chen and others published Bioaugmentation treatment of municipal wastewater with heterotrophic-aerobic nitrogen removal bacteria in a pilot-scale SBR | Find ...Web
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Carbon sources can provide electron donors for the growth of microorganisms and are an important factor affecting bacterial growth and nitrogen removal (Chen et al., 2015). In the shake flask culture, the growth and ammonia nitrogen removal characteristics of strain K17 with different carbon sources were studied.Web
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An orthogonal test was conducted to explore the significance of these four factors and their impacts on nitrogen removal as well as the nitrogen transport characteristics along the ditch. ... Wang, Y., Li, X., Zhang, S. N., Li, Y., & Wu, J. S. (2015). Nitrogen removal in an ecological ditch receiving agricultural drainage in subtropical …Web
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Innovation in decarbonizing wastewater treatment is urgent in response to global climate change. The practical implementation of anaerobic ammonium oxidation (anammox) treating domestic wastewater is the key to reconciling carbon-neutral management of wastewater treatment with sustainable development. Nitrite availability is the prerequisite of the …Web
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The maximum nitrate removal rate in acetate system was the lowest (80.79 mg N/ (L·h)) and nitrite accumulation occurred when nitrate VLR is lifted to 2400 mg N/ …Web
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The biological nitrogen removal via nitrification–denitrification is the most commonly used technique for the removal of nitrogen from wastewater during the secondary treatment. More recently anaerobic ammonia oxidation (Anammox) was developed, in which ammonia is oxidized under anoxic conditions using nitrate as …Web
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Biological Nitrogen Removal Treatment Systems Considered. Mass-balance results were examined for the four nitrogen-removal treatment systems illustrated in …Web
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Nitrogen can be removed through physical transport, burial or denitrification – the microbial-mediated conversion of bioavailable nitrogen to N 2 gas (Vitousek et al. 1997). Bacteria capable of denitrification are ubiquitous, and denitrification can occur when there is low oxygen concentration, sufficient nitrate levels and a high quantity of ...Web
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Partial nitrification (PN)-Anammox is considered to be the optimal nitrogen-removal process for municipal sewage following organic carbon and phosphorus recovery. However, under the mainstream sewage conditions of low temperature and low-ammonium concentration, the growth of nitrite-oxidizing bacteria (NOB) in the PN process cannot be …Web
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Introduction. Increasing the nitrification capacity of activated sludge processes to meet lower effluent ammonia-nitrogen (NH 3-N) concentrations, handle higher loadings, and or increase nitrogen removal can require major changes to existing water resource recovery facilities (WRRFs).Limited space and economic considerations may favor …Web
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Machat studied the effect of C/N on the biological nitrogen removal of an integrated fixed membrane-activated sludge reactor for nearly half a year. The results showed that when the C/N was ten, the …Web
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Nitrogen Removal. The usefulness of CANON as an industrial process will be determined by the ability of the system to recover from major disturbances in feed composition. ... AOA, and NOB microorganisms in nitrifying communities was observed (Daims et al., 2015; Arp and Bottomley, 2006). There was no known microorganism capable of performing ...Web
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Nitrogen removal in wastewater is an important process that remediates against eutrophication and toxicity to aquatic life in the receiving water bodies [1]. ... G., H.D. Stensel, and R. Tsuchihashi, Technologies for Sidestream nitrogen removal. 2015: Water Environment... View more references. Cited by (3) Sustainable nitrogen removal in ...Web
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keywords "wastewater" and "remove nitrogen" found that more than 70,000 articles on wastewater denitrification have been published in the last decade (2012–2021), with the number of ...Web
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The PN/A process has generated a lot of interest from water practitioners leading to the development of over 100 full-scale systems ( Lackner et al., 2014a; …Web
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The nitrogenous compounds present in wastewaters create severe biotic stress and alter the biodiversity when discharged into aquatic ecosystems.Biological nitrogen removal (BNR) encompassing well-established and emerging technologies offer an effective process for removal of nitrogen from wastewater and side-streams. The …Web
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In 2015, benthic ammonium fluxes at the monitoring station varied between 75 μmol m⁻² h⁻¹ in spring and were less than 10 μmol m⁻² h⁻¹ in summer. ... Autotrophic nitrogen removal is ...Web
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1. Introduction. It is a tendency that discharge quality standards of wastewater treatment plants (WWTPs) are becoming increasingly more stringent to reduce the nitrogen emissions (Zhu et al., 2007; Winkler et al., 2011).Existing nitrogen removal processes are difficult to meet the strict standards in an energy-saving and cost-efficient way.Web
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Stable nitrogen removal rates (NRR) of around 1.4 kg N m(-3) d(-1) were obtained at ambient temperature. Morphological characteristics and analysis of bacterial community …Web
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Results and discussion. Strain H7 presented efficient capacities for simultaneous NH 4 +-N, NO 3 −-N, or NO 2 −-N removal with As(III) oxidation during aerobic cultivation.Strikingly, the bacterial ability to remove nitrogen and oxidize As(III) has remained high across a wide range of pH values, and shaking speeds, exceeding that of …Web
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J. B. Neethling and H. De Clippeleir, Shortcut Nitrogen Removal—Nitrite Shunt and Deammonification, Water Environment Federation, Alexandria, Va, 2015 Search PubMed. M. Ali and S. Okabe, Anammox-based …Web
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However, nitrogen removal performance of strain Y-9 was contrary to P. versutus LYM, which could synchronize ammonium removal with nitrite removal and could not reduce nitrite when nitrite was used as the sole nitrogen source even in presence of enough carbon source . ... 2015; 179:421–428. doi: 10.1016/j.biortech.2014.12.057. ...Web
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However, the efficiency of nitrogen removal in the bioretention system is unstable, owing to the different chemical properties of various forms of nitrogen and the limitations of current bioretention system for nitrogen transformation. ... Sahinkaya E, Dursun N (2015) Use of elemental sulfur and thiosulfate as electron sources for water ...Web
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Many factors influence nitrogen removal in agricultural drainage ditches. However, existing research has not fully considered parameter sensitivity analysis of nitro- ... Liu et al. 2015). Many factors affect the nitrogen removal of ditch systems. However, water level, water flow, nitrogen concentration, and SS in ditch are greatly influencedWeb
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et al., 2020). ese nitrogen removal processes con vert nitrogen pollutants to several di erent o xidation states, and each pr ocess needs special running parameters ( Rahimi et al., 2020 ).Web
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The two-stage SBCWs showed high-efficient nitrogen removal capacity, with effluent total nitrogen (TN) concentration of 3.89 ± 0.62 mg/L and TN removal rate of 81.11 ± 2.92 %. Moreover, high-throughput sequencing revealed that Nitrosomonas (37.5 %) was dominant under optimal condition in W PN and responsible for partial nitrification process.Web
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By the 4th day, nitrogen and organic matter removal in PH-MBBR began to improve indicating bacterial adaption to the water quality (L I) and began to play a role in pollutant removal. As the system gradually stabilized in its efficient removal of nitrogen and organic pollutants, the effluent TN concentration was 12.30 mg/L on day 17, with a COD ...Web
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An average ammonium nitrogen removal efficiency (ARE) and total nitrogen removal efficiency (TNR) of 87.01 and 72.41%, respectively, were obtained. This represents a reliable alternative method of achieving rapid PN/A start-up. ... Huang YT, Lin JG (2015) Start-up of simultaneous partial nitrification, anammox and denitrification (SNAD) process ...Web
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nitrogen removal using MBR are evolving and are better able to represent key process differences in MBRs compared to conventional activated sludge. Although several challenges remain (e.g., membrane fouling, cost, and energy consumption), a number of opportunities ... (Camacho et al. 2015). As a result of the health effects of nitrogen, the ...Web
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Abstract. The increased nitrogen (N) input with low utilization rate in artificial N management has led to massive reactive N (Nr) flows, putting the Earth in a high-risk state. It is essential to recover and recycle Nr during or after Nr removal from wastewater to reduce N input while simultaneously mitigate Nr pollution in addressing the N ...Web
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Compared with the nitrogen removal process by anaerobic denitrification, aerobic denitrification has been proven by practice to have the advantages of simple operation, energy-saving, high efficiency, and low running cost …Web
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