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Enhancing sewage nitrogen removal via anammox and ...

Efficient nitrogen removal from domestic sewage was obtained in a sequencing batch biofilm reactor (SBBR) operated in alternate anaerobic/oxic/anoxic (A/O/A) mode. For the influent total nitrogen (TN) ranging from 30.0 to 63.3 mg N·L−1, the average nitrogen removal efficiency was 90.3 ± 2.9% with removal rate of 42.3–76.2 mg N·L−1·d−1.

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Enhanced total nitrogen removal performance in a full ...

Enhanced total nitrogen removal performance in a full scale Orbal oxidation ditch by a novel step aeration mode. Wang X(1), Chen T(2), Jin P(3), Zhang A(2), Gao C(2), Qi X(2), Zhang Y(2). Author information: (1)School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province 710021, China.

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Evolution to Enhanced Nutrient Removal

Using the BNR process, more than 90% of pollutants are removed, while achieving nitrogen concentration below 8 mg/l total nitrogen. Enhanced Nutrient Removal Program Recognizing that more needs to be done, the Chesapeake Bay 2000 Agreement requires further reduction in nitrogen and phosphorus entering the Bay by about 20 million pounds and 1 ...

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quantify the contribution of anammox for enhanced nitrogen ...

Aug 27, 2019· Enhanced nitrogen removal obtainedduring almost two years significantnitrogen removal might situenrichment anammoxbacteria addingcarriers, comprehensiveresults molecularanalysis 15N-stable isotope tracing tests.

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This Fact Sheet was prepared to provide

Nitrogen Removal . Total effluent nitrogen comprises ammonia, nitrate, particulate organic nitrogen, and soluble organic nitrogen. The biological processes that primarily remove nitrogen are nitrification and denitrification (Jeyanayagam, 2005). During nitrification ammonia is oxidized to nitrite by one group of autotrophic bacteria, most commonly

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Study on performance and mechanism of enhanced low ...

The mechanism of enhanced ammonia nitrogen removal by Fe-BACF was the joint action of many factors, among which the main causal relationship was that modification of iron could optimize the number and category of microorganisms on Fe-BAC surface by improving the surface properties, thus improving the biological nitrogen removal ability.

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Optimization of SBR system for enhanced biological ...

Aims: The aim of this study was the optimization of the SBR system for enhanced biological phosphorus and nitrogen removal. Materials And Methods: A lab-scale SBR consisting filling, pre-anoxic, anerobic, anoxic, aerobic, settling, decanting, and idle phases was proposed for simultaneous enhanced biological phosphorus and nitrogen removal (SEBPNR) from …

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Nitrogen and Phosphorus Removal Enhanced by Side Stream ...

Aug 01, 2017· An anaerobic/anoxic/oxic (A 2 O) process with a side stream phosphorus removal system was assembled to treat high nitrogen but low carbon municipal wastewater. Results showed that a suitable volume of discharged side stream enhanced contaminants removal efficiency. Recirculation of phosphorus-free sludge in side stream to anoxic tank of A 2 O …

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Wastewater Treatment Fact Sheet: External Carbon Sources ...

NITROGEN REMOVAL. Nitrogen remova l involves the initial transformation of ammonia and organic nitrogen to nitrates via nitrification, and the subsequent elimination of nitrogen through denitrification. Because nitrification typically only occurs following carbonaceous biological oxygen demand (BOD) removal, the limiting

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Enhanced Nitrogen Removal of Low C/N Wastewater in ...

Enhanced Nitrogen Removal of Low C/N Wastewater in Constructed Wetlands With Co-Immobilizing Solid Carbon Source and Denitrifying Bacteria Bioresour Technol. 2019 May;280:337-344. doi: 10.1016/j.biortech.2019.02.043. Epub 2019 Feb 10. Authors Guanlong Yu 1 ...

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Nitrogen removal through "Candidatus Brocadia sinica ...

Nitrogen removal through "Candidatus Brocadia sinica" treating high-salinity and low-temperature wastewater with glycine addition: Enhanced performance and kinetics. Li J(1), Bai L(2), Qiang Z(3), Dong H(3), Wang D(4). Author information: (1)School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.

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Enhanced nitrogen removal of aerobic denitrifier using ...

DOI: 10.1007/s00449-020-02376-8 Corpus ID: 218772356. Enhanced nitrogen removal of aerobic denitrifier using extracellular algal organic matter as …

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NitROETM Tank Technology for Enhanced Nitrogen Removal ...

3 nitrogen removal. The NitROETM tank technology is based on applications of long-established wastewater treatment processes deployed for flowrates in the 100,000 to 1,000,000 gallons per day range. Clean Water has innovatively configured and scaled down these processes to fit within the NitROETM tank, resulting in a successful nitrogen removal process for Title 5 system …

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EVALUATION OF ENHANCED COAGULATION FOR THE …

RYAN B. GUSTAFSON: Evaluation of Enhanced Coagulation for the Removal of Dissolved Organic Nitrogen and the Control of Nitrogenous Disinfection Byproduct Formation (Under the direction of Dr. Philip C. Singer) Enhanced coagulation is widely acknowledged as the best available conventional

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Performance and optimization of biological nitrogen ...

In a conventional four-stage step-feed biological nitrogen removal process, when the influent C/N was at 3.59, 2.52, 2.14 and 1.92, the TN removal efficiency could …

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Enhanced nitrogen removal from high-strength ammonium ...

Enhanced nitrogen removal from high-strength ammonium wastewater by improving heterotrophic nitrification-aerobic denitrification process: Insight into the influence of dissolved oxygen in the outer layer of the biofilm Journal of Cleaner Production ( IF 9.297) Pub Date :, DOI: 10.1016/j.jclepro.2021.126658

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Bivalve-enhanced nitrogen removal from coastal estuaries

Bivalve-enhanced nitrogen removal from coastal estuaries Ruth H. Carmichael, William Walton, and Heidi Clark Abstract: Interest in use of bivalves to remediate estuarine eutrophication has increased in recent years. High variation among data sets, substantial focus on particle removal, and insufficient links to anthropogenic nitrogen (N ...

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Enhanced nitrogen removal in SBRs bypassing nitrate ...

A lab-scale SBR was used for the study of nitrogen removal from a synthetic wastewater with an ammonium-nitrogen concentration of 50 mg/L. The react phase of the reactor operation was divided into three sets of consecutive aerobic and anoxic periods with a duration ratio of 1:3 (20 min aerobic and 1 …

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Nitrogen removal performance and microbial community of …

Apr 07, 2018· In conclusion, the nitrogen removal performance and microbial community profile of an enhanced multistage A/O biofilm reactor in the treatment of LSDW was investigated. The optimum operational parameters for best nitrogen removal were HRT of 8 h, influent distribution ratio of 2:1 and internal recycle ratio of 200%.

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Enhanced Nitrogen Removal by Rice Husk Amended Dynamic ...

Nov 11, 2014· Enhanced Nitrogen Removal by Rice Husk Amended Dynamic Membrane Bioreactors ... The goal of this study was to investigate the effect of rice husk addition on the DMBR's nitrogen removal performance. Tests were performed at both lab-scale and pilot-scale facilities. Results showed that rice husk served as a suitable biofilm carrier as well as ...

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Biological Nutrient Removal manual

The removal of nitrogen and/or phosphorus by the use of proliferation and selection of certain microbiological populations . Also See Enhanced Biological Phosphorus Removal (EBPR) Biochemical oxygen demand (BOD) The measure of the quantity of oxygen used in the biochemical oxidation of

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Can Nitrogen Removal And Enhanced Biological Phosphorus ...

Sep 17, 2014· Enhanced biological phosphorus removal (EBPR) is considered the most economical and sustainable way to remove phosphorus from municipal wastewaters, but its integration with nitrogen removal puts EBPR at risk for failure. Recent research helps resolve the conflict. Background

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Bioelectrochemical sulfate reduction enhanced nitrogen ...

May 15, 2021· Bioelectrochemical sulfate reduction enhanced nitrogen removal from industrial wastewater containing ammonia and sulfate Jiaqi Ren, College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou, China

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Enhanced biological nitrogen removal and N2O emission ...

Sep 07, 2017· Enhanced biological nitrogen removal processes are necessarily required to cope with more stringent wastewater discharging regulations, especially for wastewater with low level of organic carbon to nitrogen ratios. The intermittent aeration activated sludge process has been received comprehensive attention over the past decades, due to its excellent …

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Enhanced nitrogen removal of low C/N wastewater using a ...

Dec 05, 2019· Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1) Wenying Li Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, China

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Enhanced Nitrogen Removal of Steel Rolling Wastewater by ...

Constructed wetlands have a good removal effect on turbidity, COD, TP, NH 4 +-N, and several other pollutants, but not a satisfying removal effect on NO 3 −-N, difficult to live up to nitrogen standard especially when treating wastewater devoid of organic carbon to offer electrons [11,12].

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US9528759B2 - Enhanced nitrogen removal in an LNG facility ...

An LNG facility employing an enhanced nitrogen removal system that concentrates the amount of nitrogen in the feed stream to a nitrogen removal unit (NRU) to thereby increase the separation efficiency of the NRU. In one embodiment, the nitrogen removal system comprises a multistage separation vessel operable to separate nitrogen from a cooled natural gas stream.

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Enhanced nitrogen removal assisted by mainstream partial ...

Nov 15, 2020· This significantly enhanced nitrogen removal through partial anammox process over stable operation of 300 days. Microbial community analysis showed that the anammox bacteria were enriched in anoxic-carrier biofilms (Ca. Brocadia, 0.69%), and their abundance was significantly higher than the flocculent sludge ...

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Nitrogen removal by the enhanced floating treatment ...

Nitrogen removal by the enhanced floating treatment wetlands from the secondary effluent. Bioresour Technol. 2017; 234:243-252 ... About 89.4% of the total nitrogen (TN) was removed from AEFTW at a low S/N of 0.9 and 88.5% from HEFTW at a low C/N of 3.5 when the hydraulic retention time (HRT) was 1d in summer. ...

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CEN Models - Residential | Fuji Clean USA

CEN 14. Designed to treat up to 1,350 gallons per day of domestic strength wastewater, the one-tank CEN14 model is the company's large residential / small commercial for enhanced nitrogen removal in nutrient sensitive areas. Certified to NSF/ANSI 40/245 standards, this exceptionally small footprint system has demonstrated best-in-class nitrogen ...

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Nitrogen removal characteristics of enhanced in situ ...

The total nitrogen (TN) removal rate of the enhanced system reached 38.33±1.50% and the TN removal rate of surface sediment in the enhanced system reached 23.85±2.52%. TN removal in the control system experienced an 85.48±2.37% increase. The densities of aerobic denitrifiers in the enhanced system ranged from 2.24×10(5) to 8.13×10(7)cfu/mL.

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Enhanced nitrogen removal and in situ microbial community ...

Dec 04, 2018· When the FDR was 1:1, the intermittent aeration mode was 4 min air‐on/6 min air‐off and the influent flow was 5 L h −1, the nitrate removal efficiency in the post‐denitrification tank rose to 87.0% and the effluent TN concentration decreased below 15.0 mg L −1. The intermittent aeration strategy in the post oxic‐membrane tank ...

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