Anammox process dosed with biochars for enhanced nitrogen ...

Excellent nitrogen removal performance was observed during phase I, as reflected in the low concentration of NH 4 + and NO 2 − in the effluent . All reactors achieved 95.1% for NRE. Following an increase in the nitrogen loading on day 31, the effluent quality deteriorated for a short period of time but the reactor performance was recovered soon.

Nitrogen removal enhanced by benthic bioturbation …

Nitrogen removal was enhanced by benthic bioturbation coupled with biofilm formation. • TN removal by chironomids and biofilm was 3.19 times that of the control system. • Chironomid bioturbation promoted nitrogen release from sediments to the overlying water. • Biofilm enhanced the conversion and removal of nitrogen stirred up by ...

Enhanced nitrogen removal by a combination of anammox and ...

Enhanced nitrogen removal by a combination of anammox and heterotrophic denitrification. Haruka Shibata, Kajima Technical Research Institute, Tokyo, Japan. Search for more papers by this author. Masahiro Tatara, Kajima Technical …

Enhanced organics and nitrogen removal in batch-operated ...

Nitrogen removal in CWs is extremely complex including various physical, chemical, and biological interactions, occurring sequentially or simultaneously (Vymazal 2007). Nevertheless, biological nitrification–denitrification is widely acknowledged to be the major nitrogen removal mechanism.

Enhanced Nitrogen Removal Facilities | DCWater.com

The Enhanced Nitrogen Removal Facilities (ENRF) project reduces the level of nitrogen from the cleansed wastewater that DC Water discharges to the Potomac River. Nitrogen can act as a fertilizer in the river and Chesapeake Bay, creating unruly grasses that deplete oxygen needed by marine life to live and thrive. With this project completed, Blue Plains produces effluent with

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 ...

Enhancement of chromium removal and energy production ...

Co-occurrence of Feammox and iron sulphide-based denitrification were found in bottom CW-MFC, leading to the enhanced nitrogen removal in the system. The genera of SRB (Desulfosporosinus ...

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

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.

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

A removal efficiency of 96% was achieved for nitrate nitrogen at 30 °C and pH of 7.5 for synthetic wastewaters solutions at different C/N ratios. Much higher average removal rates of COD (79%), ammonia nitrogen (85%), and total nitrogen (78%) were …

Enhanced nitrogen removal and quantitative molecular ...

Enhanced nitrogen removal and quantitative analysis of removal mechanism in multistage surface flow constructed wetlands for the large-scale treatment of swine wastewater J. Environ. Manag., …

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

Enhanced nitrogen and phosphorus removal by natural pyrite ...

Four subsurface flow constructed wetlands (SFCWs) filled with different substrates including ceramsite, ceramsite+pyrite, ceramsite+ferrous sulfide, and ceramsite+pyrite+ferrous sulfide (labeled as SFCW-S1, SFCW-S2, SFCW-S3, and SFCW-S4) were constructed, and the removal of nitrogen and phosphorus by these SFCWs coupled with intermittent aeration in the front section was …

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

Effect of humic acid on the single-stage nitrogen removal ...

SNAP process was efficient for humic acid containing ammonium wastewater treatment. • 576 mg·L-1 humic acid enhanced nitrogen removal efficiency maximally to 96% and nitrogen removal rate to 1.61 kgN·m-3 ·d-1.. Humic acid simulated the growth of anammox bacteria (Candidatus_Brocadia and Candidatus Kuenenia).Nitrate reductase and nitrite reductase in KEGG and COG database were …

Enhanced nitrogen removal by membrane-aerated …

Enhanced nitrogen removal by membrane-aerated nitritation-anammox in a bioelectrochemical system Bioresour Technol. 2017 Aug;238:22-29. doi: 10.1016/j.biortech.2017.04.022. Epub 2017 Apr 9. Authors Yuli Yang 1, Xiaojin Li 2, Xiaoli Yang 3, Zhen He 4 Affiliations 1 School of Civil Engineering ...

CiteSeerX — Enhanced Nitrogen Removal in Trickling Filter ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The Beaudesert Sewage Treatment Plant (STP), originally built in 1966 and augmented in 1977, is a typical biological trickling filter sewage treatment plant comprising primary sedimentation tanks, trickling filters and humus tanks. The plant, despite not originally being designed for nitrogen removal, has been ...

Proposed General Permit for Nitrogen Discharges

nitrogen removal so as to reduce nitrogen discharges to the maximum extent practicable. This includes but is not limited to all recycle pumping systems, aeration equipment, aeration tank cycling, mixing equipment, anoxic basins, chemical feed systems or any other process equipment necessary for the optimal removal of nitrogen.

Enhanced Nutrient Management of Stormwater through a …

This is likely due to the enhanced denitrifying conditions and increased hydraulic detention time associated with the IWSZ. Furthermore, nitrogen removal in the modified system was observed to be greater during the initial period of a storm event compared to the final period.

Enhanced Nitrogen Removal by Rice Husk Amended Dynamic ...

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 ...

Complete nitrogen removal from over-aeration treated black ...

2 The abundance of nitrogen metabolism in R4 was 1.13 times greater than that in R0 (p < 0.05), again confirming that the coupled treatment significantly enhanced nitrogen removal. Noteworthy, the coupled treatment also significantly stimulated the oxidative phosphorylation (1.06-fold change, p < 0.05).

Can Nitrogen Removal And Enhanced Biological Phosphorus ...

By Dr. Juan A. Baeza, Dr. Albert Guia, and Dr. Javier Guerrero. 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 …

Bioelectrochemical sulfate reduction enhanced nitrogen ...

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

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. ...

Enhanced biological nitrogen removal in MLE combined with ...

Enhanced biological nitrogen removal in MLE combined with post-denitrification process and EF clarifier Bioprocess Biosyst Eng. 2012 May;35(4):503-11. doi: 10.1007/s00449-011-0623-y. Epub 2011 Sep 21. Authors C M Chung 1, K W Cho, Y J Kim, K Yamamoto, T H Chung. Affiliation 1 …

Nitrogen removal by the enhanced floating treatment ...

The nitrogen removal performance in HEFTW and AEFTW were vastly superior to a hybrid floating treatment bed using plant and periphyton (30% in 3 days) (Liu et al., 2016) and an enhanced ecological floating bed of only 15.3% (Wu et al., 2016).

Encapsulating microorganisms to enhance biological ...

The average nitrogen loading, nitrogen conversion rate, and total nitrogen removal on the anammox reactor were 3.6 kg-N/m³/d, 3.0 kg-N/m³/d and 330 kg-N/d, respectively.

Can Nitrogen Removal And Enhanced Biological Phosphorus ...

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

Enhanced nitrogen removal reliability and efficiency in ...

The results showed that VF2-HSF2 compared to VF1-HSF1 was not only a more reliable nitrogen removal method, but also enhanced the nitrogen removal efficiency by 50%. The average apparent rate of nitrogen removal in VF2-HSF2 reached …

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

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, 030024 Shanxi, China.

Publication year rev: 7979-2021 / Subject term: nitrates ...

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Figure 1 from Tertiary nitrogen removal for municipal ...

DOI: 10.1016/j.watres.2016.02.009 Corpus ID: 5229894. Tertiary nitrogen removal for municipal wastewater using a solid-phase denitrifying biofilter with polycaprolactone as …

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

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 …

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 ...