Start-up of a full-scale SNAD-MBBR process for treating sludge digester liquor

Xü, Xinsheng; Wang, Gang; Zhou, Liang; Yu, Hongmiao; Yang, Fenglin

doi:10.1016/j.cej.2018.03.032

Cited by 95 publications

(10 citation statements)

References 25 publications

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“…Thereafter, it declined to the minimum of 44.31% removal at Stage III. These results indicated that when the average influent

{NH}_{4}^{+} - N

concentration was more than 253.55 mg/L, a high amount of free ammonia (FA) would be generated (Xu et al , 2018), which probably could inhibit the growth of AOB and NOB. It has been previously reported that NOB is more sensitive to FA than AOB (Wang et al , 2017).…”

Section: Resultsmentioning

confidence: 99%

Start‐up strategy and bacterial community analysis of SNAD process for treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous‐flow biofilm reactor

Xin

Liu

Werner

et al. 2020

Water & Environment J

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Simultaneous partial nitrification, anammox and denitrification (SNAD) process for treating anaerobic digester liquor of swine wastewater (ADLSW) was achieved successfully in a continuous-flow biofilm reactor by gradually increasing the influent ammonium (NH + 4 − N) concentration whilst controlling the low dissolved oxygen (DO) concentration. After 180 days of operation, the average removal efficiencies of NH + 4 − N, total nitrogen (TN) and COD were 61.59, 55.76 and 75.21% respectively. Also, the average conversion efficiency Y (NO − 2 +NO − 3)∕NH + 4 of total effluent nitrite and nitrate production to ammonia consumption was kept at about 0.053 at the last stage (days 181-218). Anaerolineaceae (26.92%), Candidatus Brocadia (3.96%), Candidatus-Kuenenia (4.69%), Armatimonadetes-norank (4.25%), Limnobacter (4.15%), Xanthomonadaceae (3.07%) and Ignavibacterium (2.87%) were the dominant genera in the SNAD system for treating ADLSW. The quantitative polymerase chain reaction (qPCR) results further confirmed that the coexistence and enrichment of anammox bacteria, ammonium oxidising bacteria (AOB) and denitrifying bacteria (HB) in the bioreactor.

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“…Thereafter, it declined to the minimum of 44.31% removal at Stage III. These results indicated that when the average influent

{NH}_{4}^{+} - N

Section: Resultsmentioning

confidence: 99%

Start‐up strategy and bacterial community analysis of SNAD process for treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous‐flow biofilm reactor

Xin

Liu

Werner

et al. 2020

Water & Environment J

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“…Simultaneous partial nitrification, anammox, and denitrification (SNAD) were observed in them [23]. SNAD progresses at low DO levels; laboratory and full-scale SNAD studies have utilized swine waste, its anaerobic digestion liquor, and other wastewaters as landfill leachate and sludge digester liquor, with the DO concentration set at various levels, such as below 0.5 mg/L [24], 0.3 mg/L [25], 0.3-0.5 mg/L [26], <0.2 mg/L [12], and 0.19-0.54 mg/L [13]. A two-year study by Ishimoto et al [14] demonstrated the importance of limiting DO levels below 0.3 mg/L among the DO fluctuations to improve nitrogen removal in the Shizu-1 facility.…”

Section: Discussionmentioning

confidence: 99%

An Analysis of Operation Conditions and Microbial Characteristics in Swine Wastewater Treatment Plants with Spontaneously Enriched Anammox Bacteria

et al. 2021

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The spontaneous enrichment of anammox bacteria has been reported in swine wastewater treatment facilities. However, their causative conditions and microbial characteristics, which this study aims to explain, are poorly understood. We discovered eight treatment facilities where the collected red biofilms exhibited high anammox activity levels at 57–843 µmol-N2/g-ignition loss (IL)/h and anammox DNA concentrations of 4.3 × 108–1.6 × 1012 copies/g-IL. The facilities used various wastewater treatment methods—six of them employed a multi-stage continuous reactor, whereas aeration tanks were continuously aerated at another combination of six facilities. Levels of dissolved oxygen (DO) in these tanks were fairly low at ≤1 mg/L. Pyrosequencing of the biofilms indicated the presence of 3–62.5% Planctomycetes, and the dominant anammox in each biofilm comprised three operational taxonomic units (OTUs) similar to Candidatus Jettenia asiatica, Ca. Brocadia fulgida, and Ca. B. caroliniensis. This suggested that some particular species of anammox bacteria naturally thrive when operating a swine wastewater treatment facility at low DO levels. The frequent enrichment of anammox biofilms at the sampled sites indicated that these treatment facilities were good seed sources of anammox; therefore, anammox treatment would be a viable method for the removal of nitrogen from swine wastewater.

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“…After reviewing all the previous studies, especially those that carry patents, it is noticed that all of them have dealt with and focused on digested water (centrate), this indicates that SSs has not been permanently eliminated. In this study, all SSs lines were eliminated, this has achieved many advantages compared to other studies, as shown in Table 11 (Gonzalez-Martinez et al, 2016;Lackner et al, 2014;Sánchez et al, 2014;van Dongen et al, 2001;Xu et al, 2018).…”

Section: Comparison Of En-mbbr System With Other Reactorsmentioning

confidence: 99%

“…On the other hand, the operation of conventional activated sludge process is consisted of mainstream line that represent the wastewater ow throughout the treatment facilities, and sidestreams (SSs) lines that come from the sludge management units (Jia et al, 2020;Vineyard et al, 2021). SSs are the leachate produced from sludge treatment and this leachate is highly polluted compared to mainstream (Xu et al, 2018). They have a high concentration of organic pollutants and nutrients, hence, most of wastewater treatment plants operators consider the returning of SSs to plant wastewater head as one of the main reasons for the deterioration of the conventional activated sludge system.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Novel Processes for Eliminating Sidestreams Impacts on Full-Scale Sewage Treatment Plant Using GPS-X7

Faris

Zwain²,

Hosseinzadeh

et al. 2021

Preprint

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Worldwide, most of treatment system are retuning sidestreams (SSs) to the plant wastewater head without treatment, and some innovations are only treating centrate. In this study, an innovative process was established to separately treat all SSs away from plant mainstream and return treated sidestream effluents to plant wastewater outfall instead of wastewater head. This innovative process aims to eliminate SSs impacts on full scale A2/O sewage treatment plant. To do so, a novel pilot extended nutrient moving bed biofilm reactor (EN-MBBR) was developed to treat all SSs lines (supernatant gravity thickener, underflow mechanical thickener, and centrate), and SSs elimination on full scale A2/O system was simulated using GPS-X7. The results of two steps innovative treatment showed that 98, 98, 93, 100, 85, 100 and 98% of TSS, BOD, COD, NH4, NO3, H2S and PO4-P were removed from SSs, respectively. The two steps innovative treatment combined degradation, nitrification, and dilution processes. The simulation results proved that eliminating SSs has eliminated hydraulic and pollutants shocks, reduced the volumes of full scale A2/O facilities, and minimized cost and energy. Moreover, the calibrated model was validated with R values more than 0.8 and NMSE values close to zero. To conclude, the innovative process in this study successfully treated SSs separately and eliminated their impacts.

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Start-up of a full-scale SNAD-MBBR process for treating sludge digester liquor

Cited by 95 publications

References 25 publications

Start‐up strategy and bacterial community analysis of SNAD process for treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous‐flow biofilm reactor

Start‐up strategy and bacterial community analysis of SNAD process for treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous‐flow biofilm reactor

An Analysis of Operation Conditions and Microbial Characteristics in Swine Wastewater Treatment Plants with Spontaneously Enriched Anammox Bacteria

Modeling of Novel Processes for Eliminating Sidestreams Impacts on Full-Scale Sewage Treatment Plant Using GPS-X7

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