Enhancement of methane production and phosphorus recovery with a novel pre-treatment of excess sludge using waste plaster board

Kanazawa, Sui; Matsuura, Norihisa; Honda, Ryo; Yamamoto-Ikemoto, Ryoko

doi:10.1016/j.jenvman.2019.109844

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…Regarding the microbial community analysis, a host of potential hydrolytic/acidogenic functional bacteria affiliated with Proteobacteria and Firmicutes were detected in the hydrolytic/acidogenic tank, in line with the findings of previous research [27,28]. These functional bacteria mainly included Desulfobulbus [37], Comamonas [38], and Advenella [39] affiliated with the Proteobacteria phylum and Fastidiosipila [40], Eubacterium [41], Sedimentibacter [42], Syntrophomonas [4], norank_f_Syntrophomonadaceae [4], Caldicoprobacter [43], and Proteiniclasticum [44] affiliated with the Firmicutes phylum. These genera could improve the biodegradability of the co-digestion wastewater with the potential for the conversion of large-molecular and complex organics (e.g., proteins, polysaccharides, aromatic components, heterocyclic organics, and long-chain fatty acids) into small-molecular organic acids (e.g., acetic acid, lactic acid, propionic acid, and butyric acid).…”

Section: Transformation Mechanism Of Domssupporting

confidence: 88%

“…The genera affiliated with Proteobacteria mainly included Desulfobulbus (10.58%), Comamonas (8.88%), and Advenella (1.1%). Among these genera, Desulfobulbus was the most dominant genus in the hydrolytic/acidogenic process and was widely reported to play a vital role in the mesophilic anaerobic digestion of sewage sludge [37]. Comamonas was proven to be able to degrade many kinds of aromatic compounds [38], and Advenella was also widespread in mesophilic fermentation and related to organic removal [39].…”

Section: Microbial Community In the Hydrolytic/acidogenic Processmentioning

confidence: 99%

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Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

et al. 2022

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The membrane bioreactor (MBR) serves as the most widely used technology in anaerobic digestion wastewater treatment, but the composition and transformation of the dissolved organic matters (DOMs) are vague. This study focused on the composition characterization and transformation mechanism of DOMs in real co-digestion wastewater of food waste and sewage sludge from a full-scale MBR via molecular weight cut-off, 3D-EEM, FT-IR, and SPME-GC/MS. The results indicated that the co-digestion wastewater mainly comprised organics with molecular weight (MW) lower than 1 kDa and dominated by tryptophane-protein-like substances. The hydrolytic/acidogenic process improved the biodegradability with the conversion of high-MW organics into low-MW organics, while the two-stage A/O process possessed the highest contribution to the organic removal with the consumption of most DOMs. However, the deficient removal of refractory organics (MW < 5 kDa) in the ultrafiltration unit led to the residual DOMs in the effluent. The potential functional bacteria in the biological processes have also been identified and were principally affiliated with Proteobacteria and Firmicutes. These findings could help to advance the understanding of the co-digestion wastewater and provide fundamental information for the optimization and development of MBR in anaerobic digestion wastewater treatment.

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Section: Transformation Mechanism Of Domssupporting

confidence: 88%

Section: Microbial Community In the Hydrolytic/acidogenic Processmentioning

confidence: 99%

Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

et al. 2022

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“…Parabacteroides can use polysaccharides to produce VFA, with the main fermentation products being acetate and succinate [30]. Desulfobulbus is able to adopt use propionate, lactate, pyruvate, and ethanol as electron donors and carbon sources and partially oxidize organic matter to acetate [31]. Thauera can achieve hydrogen oxidation autotrophic denitrification [32].…”

Section: Effects Of Ph Adjustment On the Archaeal Community Structurementioning

confidence: 99%

Effects of pH Adjustment on the Release of Carbon Source of Particulate Organic Matter (POM) in Domestic Sewage

et al. 2022

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The use of anaerobic hydrolytic fermentation to develop more available carbon sources from domestic sewage influent particulate organic matter (POM) has received increasing attention. However, the slow hydrolysis rate of POM limits the application of this technology. This study aimed to improve the carbon source release efficiency of POM by pH adjustment and to reveal the hydrolysis mechanism. Results showed that adjusting the initial pH of POM to 3, 9, and 11 enhanced carbon source release in the anaerobic hydrolysis fermentation process of POM. The pretreatment under pH value of 11 contributed to the highest yield and productivity of carbon source, reaching the soluble chemical oxygen demand (SCOD) of 2782 mg/L at the 4th day. The pH 3 pretreatment was more beneficial for phosphorus resource recovery, which contributed to the highest release concentration of PO43−-P, reaching 48.2 mg/L at the 3rd day, accounting for 90% of TP. Microbial community structure analysis indicated that pH 11 preconditioning promoted the enrichment of proteolytic bacteria (Proteocatella and Proteiniclasticum) and polysaccharide hydrolytic bacteria (Trichococcus and Acinetobacter) and inhibited the growth of acetate-consuming methanogenic archaea, which contributed to the highest carbon release of POM in domestic sewage.

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“…Gallicola is a non-saccharolytic anaerobic bacterium appearing on VFAs, H 2 , and CO 2 formation [23]. Desulfobulbus can utilise pyruvates, propionates, and ethanol as a carbon source and oxidise organic matter to acetate incompletely [24].…”

Section: Bacterial Community Structurementioning

confidence: 99%

Intermittent Microaeration Technology to Enhance the Carbon Source Release of Particulate Organic Matter in Domestic Sewage

Zhu

Liu

et al. 2022

Water

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Domestic sewage treatment plants often have insufficient carbon sources in the influent water. To solve this problem, the commonly used technical means include an additional carbon source, primary sludge fermentation, and excess sludge fermentation, but these methods are uneconomical, unsustainable, and not applicable to small-scale wastewater treatment plants. Intermittent microaeration technology has the advantages of low energy-consumption, ease of application, and low cost, and can effectively promote anaerobic digestion of municipal sludge; however little research has been reported on its use to enhance the carbon sources release of particulate organic matter (POM) from domestic wastewater. Therefore, the effect of intermittent microaeration on the carbon source release of POM was evaluated in this study, with POM as the control test. The results showed that the release concentration of soluble chemical oxygen demand (SCOD) was the highest on day 4 under microaerobic conditions, and the concentrations of SCOD, NH4+-N, and PO43−-P in the liquid phase were 1153, 137.1, and 13 mg/L, respectively. Compared with the control group, the SCOD concentration increased by 34.2%, and the NH4+-N and PO43−-P concentrations decreased by 18.65% and 17.09%, respectively. Intermittent microaeration can effectively promote the growth of Paludibacter, Actinomyces, and Trichococcus hydrolytic fermentation functional bacteria. Their relative abundances increased by 282.83%, 21.77%, and 23.47%, respectively, compared with the control group. It can simultaneously inhibit the growth of acetate-type methanogenic archaea, Methanosaeta and Methanosarcina, with a decrease in relative abundances of 16.81% and 6.63%, respectively. The aforementioned data show that intermittent microaeration can not only promote the hydrolysis of POM, but can also reduce the loss of acetic acid carbon source, which is a cost-effective technical way to enhance the release of a carbon source of particulate organic matter in domestic sewage.

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Enhancement of methane production and phosphorus recovery with a novel pre-treatment of excess sludge using waste plaster board

Cited by 6 publications

References 21 publications

Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

Composition Characterization and Transformation Mechanism of Dissolved Organic Matters in a Full-Scale Membrane Bioreactor Treating Co-Digestion Wastewater of Food Waste and Sewage Sludge

Effects of pH Adjustment on the Release of Carbon Source of Particulate Organic Matter (POM) in Domestic Sewage

Intermittent Microaeration Technology to Enhance the Carbon Source Release of Particulate Organic Matter in Domestic Sewage

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