At an influent NO 3--N concentration of 50 mg/L, NO 3--N removal efficiency of the sulfur/pyrite-based bioreactor was 99.2%, producing less NH 4 +-N and SO 4 2-than the sulfur-based bioreactor, even after long-term operation. Denitrification performance was significantly related to environmental variable, especially dissolved oxygen.

2011/6/1/ · N 2 O and NH 3 emissions from a bioreactor landfill operated under limited aerobic degradation conditions. Author links open overlay panel Pinjing He, Na Yang, Huili Gu, Hua Zhang, Liming Shao. While for column 5 loaded with partially stabilized refuse and leachate of low COD concentration, the cumulated productions of

2015/4/8/ · The primary purposes of this work are (1) to investigate the impact of influent C/N ratio on the direct emissions of N 2 O, CO 2, and CH 4 from an A/A/O process fed with actual sewage, and (2) to identify the optimal influent C/N ratio at which high pollutant removal efficiency and low GHG emission rate can be simultaneously achieved. In

2021/7/1/ · Carbon dioxide (CO 2) and methane (CH 4) produced by denitrification bioreactors in processing agricultural surface runoff have contributed to increasing proportion of greenhouse gases (GHG) emissions. It is the first time to monitor and quantify the emission flux of CO 2 and CH 4 produced by laboratory-scale denitrification

2016/6/1/ · Variations in the F max values (R.U) of C1, C2, and C3 in bound extracellular polymeric substances (bEPS) for the high aeration membrane bioreactor (HMBR) (a) and the low aeration membrane bioreactor (LMBR) (b), soluble microbial products (SMP) for the HMBR (c) and the LMBR (d), and permeate for the HMBR (e) and

2022/4/1/ · Membrane bioreactors (MBRs) have become one of the most promising technologies in wastewater treatment. This study aimed to investigate the emission characteristics, source analysis and health risk of bioaerosols generated from a wastewater treatment plant (WWTP) with an MBR throughout the entire process.

2023/1/11/ · 2. The Role of Algae in CO 2 Removal. As compared to indirect CO 2 sequestration, algae-based bioreactor systems require human-controlled intervention. Unlike forest-based sequestration that is often hindered by the availability of land, algae-based approach utilizes land more efficiently and has the potential to provide a superior

This manuscript demonstrated that comammox can adapt well to the weakly acidic and low-DO bioreactors, with a result of efficient nitrification and low N 2 O emission. These

2019/3/1/ · Temporal and spatial GHG emissions monitored in a plug-flow full-scale bioreactor. • N 2 O emissions present temporal and spatial variability with periods of no emission.. N 2 O emissions were linked to the arrival of ammonium in the monitored zone.. Constant temporal CH 4 emissions were detected, showing only spatial variability.. CH 4

Rising feedstock costs, low crude oil prices, and other macroeconomic factors have threatened biofuel fermentation industries. Energy-efficient reactors, which provide controllable and stable biological environment, are important for the large-scale production of renewable and sustainable biofuels, and their optimization focus on the reduction of

2023/5/1/ · Anaerobic membrane bioreactor (AnMBR), a promising technology for the treatment of municipal wastewater Most importantly, it is expected that the AnMBR will have lower GHG emissions than the CASP owing to its low energy demands for the mainstream line and low sludge production for the sidestream line. As an anaerobic

ABSTRACT. Methane (CH 4) and nitrous oxide (N 2 O) emissions from two-stage membrane bioreactor (MBR) bio-augmented by Alcaligenes faecalis no. 4 during municipal solid waste leachate treatment were investigated. The system was operated at hydraulic retention time (HRT) of 2.5 and 1 days in each reactor under the presence and absence …

N 2 O emissions were present at low levels in early stages for each bioreactor, and then, increased by 1-3 orders of magnitude in the later stages due to low influent carbon-nitrogen ratio. HIA resulted in maximum cumulative N 2 O emissions (2884.6 mg) and experienced a longer emission period (179 days) compared to CMA (2281.6 mg; 151 days).

2017/4/15/ · The effect of the carbon-to-nitrogen (C/N) ratio in the influent on the nitrous oxide (N 2 O) emission from a University of Cape Town Membrane BioReactor pilot plant was investigated. The membrane was located in a separate tank to single out the production of N 2 O due to the biological processes from N 2 O stripping as a result of the extra …