Enhanced nitrogen removal with spent mushroom compost in a sequencing batch reactor

Yang, Yang; Tao, Xin; Lin, E. C. C.; Hu, Kaihui

doi:10.1016/j.biortech.2017.08.050

Cited by 18 publications

(5 citation statements)

References 45 publications

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“…The same behavior for N2O/NO2accumulation in the liquid phase was observed for the maximum N2O flux throughout the study period, with an increase in emitted N2O in parallel with an increased N2O production rate retained from the previous phases (Figure 5). Other studies have reported the same liquid N2O accumulation problem during the anoxic phase and its implications for the next aerobic phase (Gustavsson and La Cour Jansen, 2011;Yang et al, 2017;Pijuan et al, 2014;Mampaey et al, 2016). Thus, alternation between the anoxic and aerobic phases can be a negative point for N2O emission mitigation in wastewater treatment processes applying N removal.…”

Section: Figure 3 (A) No2mentioning

confidence: 71%

“…Although non-toxic, geosmin and 2methylisoborneol (2-MIB), two products released by cyanobacteria, can influence drinking water organoleptic characteristics, representing an obstacle to water treatment (Freitas et al, 2008). In order to prevent eutrophication, wastewater treatment plants (WWTPs) must be improved to ensure that N loads to receiving water bodies are within the limits stipulated by local legislation (Yang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Nitrite build-up effect on nitrous oxide emissions in a laboratory-scale anaerobic/aerobic/anoxic/aerobic sequencing batch reactor

2021

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Biological wastewater treatment processes with biological nitrogen removal are potential sources of nitrous oxide (N2O) emissions. It is important to expand knowledge on the controlling factors associated with N2O production, in order to propose emission mitigation strategies. This study therefore sought to identify the parameters that favor nitrite (NO2-) accumulation and its influence on N2O production and emission in an anaerobic/aerobic/anoxic/aerobic sequencing batch reactor with biological nitrogen removal. Even with controlled dissolved oxygen concentrations and oxidation reduction potential, the first aerobic phase promoted only partial nitrification, resulting in NO2- build-up (ranging from 29 to 57%) and consequent N2O generation. The NO2- was not fully consumed in the subsequent anoxic phase, leading to even greater N2O production through partial denitrification. A direct relationship was observed between NO2- accumulation in these phases and N2O production. In the first aerobic phase, the N2O/NO2- ratio varied between 0.5 to 8.5%, while in the anoxic one values ranged between 8.3 and 22.7%. Higher N2O production was therefore noted during the anoxic phase compared to the first aerobic phase. As a result, the highest N2O fluxes occurred in the second aerobic phase, ranging from 706 to 2416 mg N m-2 h-1, as soon as aeration was triggered. Complete nitrification and denitrification promotion in this system was proven to be the key factor to avoid NO2- build-up and, consequently, N2O emissions.

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Section: Figure 3 (A) No2mentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Nitrite build-up effect on nitrous oxide emissions in a laboratory-scale anaerobic/aerobic/anoxic/aerobic sequencing batch reactor

2021

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“…The V3-V4 16s rRNA and ITS1-ITS2 ITS regions were amplified with general primers, as shown in Table 2, and the sequencing was carried out by the Biomarker Biotechnology Company (Beijing, China). The data was analyzed as in our previous report [20].…”

Section: High Through Sequencingmentioning

confidence: 99%

“…An absolute quantitative polymerase chain reaction (qPCR) was employed to quantify the typical nitrite reductase genes NirS and NirK in activated sludge samples. The qPCR system and standard curve were prepared as in our previous report [20].…”

Section: Functional Gene Quantificationmentioning

confidence: 99%

“…Edible mushrooms are an important food resource, and their cultivation process could generate large amounts of solid waste (spent mushroom substrates (SMS)), leading to a formidable challenge for disposal management [10][11][12]. Besides the various recycling methods for SMS [13][14][15][16][17][18][19], we have previously proven that the acid hydrolysates of SMS can act as an external carbon source for the treatment of low C/N ratio wastewater using a sequencing batch reactor (SBR) [20]. However, the acid pretreatment of SMS proceeds at a high temperature with additional sulfur acid, and a more economical and convenient method should be proposed.…”

Section: Introductionmentioning

confidence: 99%

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Microbiological Mechanisms for Nitrogen Removal Using Anaerobic Fermentation Liquid from Spent Mushroom Substrates as a Carbon Source

Chen,

Zhang,

et al. 2023

Water

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In wastewater treatment, a low C/N ratio highly inhibits the bioremoval of nitrogen, and commercial external carbon sources are widely used. In order to obtain an economical substitute, fermentation broth of spent mushroom substrates (SMS) was employed here as a carbon source for denitrification in a sequencing batch reactor (SBR). During the domestication process, the SMS fermentation broth-feeding treatment presented comparable nitrogen removal ability (74.44%) with a commercial carbon source group (77.99%). Rhodobacter, Lactobacillus and Pseudomonas were the dominant bacteria in the fermentation broth, and Saccharomycetales Gymnopilus dilepis was the dominant fungi. At the early domestication stage, the relatively high concentration of fermentation broth led to a much lower abundance of typical nitrate reductase genes than the control group. Furthermore, extracellular polymeric substance (EPS) formation was observed in the broth-feeding sample. The microbial structure dynamic was investigated, which showed a high influent effect when 20% fermentation broth was added. As domestication proceeded, similar dominant species in the control and broth-feeding treatments were observed. Overall, SMS fermentation broth can be used as a promising substitute to replace a costly commercial carbon source.

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Environmentally sustainable applications of agro-based spent mushroom substrate (SMS): an overview

Hanafi

Rezania

Taib

et al. 2018

J Mater Cycles Waste Manag

161

102

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Enhanced nitrogen removal with spent mushroom compost in a sequencing batch reactor

Cited by 18 publications

References 45 publications

Nitrite build-up effect on nitrous oxide emissions in a laboratory-scale anaerobic/aerobic/anoxic/aerobic sequencing batch reactor

Nitrite build-up effect on nitrous oxide emissions in a laboratory-scale anaerobic/aerobic/anoxic/aerobic sequencing batch reactor

Microbiological Mechanisms for Nitrogen Removal Using Anaerobic Fermentation Liquid from Spent Mushroom Substrates as a Carbon Source

Environmentally sustainable applications of agro-based spent mushroom substrate (SMS): an overview

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