Sulfate affects the anaerobic digestion process treating nitrogenous fertilizer wastewater

Zhang, Han; Zhang, Xiaojing; Chen, Zhao; Liu, Shuoshuo; Nai, Can; Zhang, Hongzhong

doi:10.1016/j.bej.2022.108550

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…The amount of passivator added in the optimal treatment group is 6, 2 and 6 g. By comparing the sum of index values of factor B (the amount of FeSO 4 added) at different levels (Ki, i = 1, 2, 3), high concentration of FeSO 4 would inhibit gas production. Sulfate-reducing bacteria have higher affinity for acetic acid and hydrogen than methanogens by the accumulation of SO 4 2− , and anaerobic digestion was inhibited [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Effects of Inorganic Passivators on Gas Production and Heavy Metal Passivation Performance during Anaerobic Digestion of Pig Manure and Corn Straw

Luo

Peng

et al. 2022

IJERPH

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The treatment of livestock manure caused by the expansion of the breeding industry in China has attracted wide attention. Heavy metals in pig manure can pollute soil and water and even transfer to crops, posing harm to humans through the food chain. In this study, corn straw was selected as the additive and introduced into the anaerobic digestion. Sepiolite (SE), ferric oxide (Fe2O3), attapulgite (AT) and ferric sulfate (FeSO4) were used as passivators to compare the effects of these inorganic passivators on gas production and passivation of heavy metals during the process of the anaerobic digestion. When the dry mass ratio of pig manure to straw is 8:2, the gas production efficiency is optimal. SE, AT and ferric sulfate have a much stronger ability to improve gas production performance than Fe2O3. The total gas production increased by 10.34%, 6.62% and 4.56%, and the average methane production concentration increased by 0.7%, 0.3% and 0.4%, respectively. The influence of SE, AT and ferric sulfate on the passivation of heavy metals is much better than Fe2O3, and the fractions in biological effective forms of Cu and Zn reduced by 41.87 and 19.32%, respectively. The anaerobic digestion of mixed materials is conducive to the gas production and the passivation of heavy metals. Therefore, SE, AT and ferric sulfate are selected as composite passivators, and the optimal ratio of inorganic composite passivators i: AT 7.5 g/L, ferric sulfate 5 g/L and SE 7.5 g/L, according to the results of orthogonal experiments. This study can provide a theoretical basis for the safe application of biogas fertilizers.

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Section: Resultsmentioning

confidence: 99%

Effects of Inorganic Passivators on Gas Production and Heavy Metal Passivation Performance during Anaerobic Digestion of Pig Manure and Corn Straw

Luo

Peng

et al. 2022

IJERPH

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“…The substrate was supplemented with nitrogen to maintain a low but adequate C/N ratio throughout the experimental period. Zhang et al, 2022 [51] reported that sulfate concentrations between 200 mg/L and 1200 mg/L can promote the organic removal and methane production during anaerobic digestion of nitrogenous wastewater. After the sulfate addition, nitrogen removal was increased due to the use of ammonium for microbial growth.…”

Section: Uasb Performance With and Without The Addition Of Sulfatementioning

confidence: 99%

Improving the Biogas Production and Methane Yield in a UASB Reactor with the Addition of Sulfate

Theodosi Palimeri,

Papadopoulou,

Vlyssides

et al. 2023

Sustainability

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Sulfate is of great importance in anaerobic digestion as its addition can help control the microbial community. In this study, the effect of sulfuric acid addition on the performance of a UASB reactor fed with hydrolyzed starch was investigated. The total organic carbon (TOC), Fe, SO42− removal and methane production were monitored under various chemical oxygen demand (COD) to SO42− ratios, hydraulic retention times (HRTs) and organic loading rates (OLRs). When the HRT was 16 h, and the OLR was equal to 2 g COD/LUASB-day, methane production was 0.24 L CH4/LUASB-day. After the addition of sulfuric acid, TOC removal reached 95%, and the population of Ruminococcus sp. that utilize soluble carbohydrates increased by 19.7%. Nitrogen removal was less than 25%, while the population of Ignavibacterium sp. accounted for 2.3%. When the HRT, OLR and COD/SO42− ratios were equal to 16 h, 2 g COD/LUASB-d and 3.72, respectively, methane production was 0.267 L CH4/LUASB-day. When the OLR increased to 5.94 g, the COD/LUASB-day and COD/SO42− ratios were equal to 12.5, and methane production was three times higher (0.84 L CH4/LUASB-day), with a methane content in the produced biogas greater than 70% due to the increased amount of Methanosaeta sp. and direct interspecies electron transfer. Sulfate addition increased the relative abundance of Desulfovibrio sp., accounting for 9.9% and an iron accumulation exceeding 98.0%. This study indicates that appropriate sulfate concentrations in the feed in combination with the presence of iron in the UASB lead to enhanced methane yields.

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“…The quality analysis of cultivated land in China [22] Scientia Agricultura Sinica 326 Review 2011 Yinjun Chen (Chinese Academy of Agricultural Sciences)…”

Section: Corresponding Author (Affiliation)mentioning

confidence: 99%

Analysis of the characteristics of innovation in highly cited papers: A case study of highly cited papers published in comprehensive agricultural science core journals in China

2023

Edit Pract

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Background: This paper aims to deepen the understanding of innovation in academic papers among scientific and technical (sci-tech) journal editors and authors and to promote the production of excellent papers and the improvement of academic quality of sci-tech journals. Methods: This research conducted a thorough analysis on the innovative features of 57 highly cited papers published on comprehensive agricultural science core Chinese journals from 2011 to 2020, as retrieved from the China National Knowledge Infrastructure (CNKI) database. The CNKI database was also used for auxiliary retrieval and verification of related information. Results: The innovative features of highly cited review papers include the application of new technologies, use of novel ideas to solve urgent major problems, and summarization for the latest international research progress. The innovative content of highly cited research papers includes achieving significant new results, opening up broad new fields, creating widely applicable new methods, and using new breakthrough methods. Conclusion: Innovation is the soul of scientific research and its resulting papers. When sci-tech journal editors select topics and review papers around these features of innovation, it can contribute to the production of high-quality, high-impact papers and enhance the academic quality of the journals.

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Sulfate affects the anaerobic digestion process treating nitrogenous fertilizer wastewater

Cited by 12 publications

References 26 publications

Effects of Inorganic Passivators on Gas Production and Heavy Metal Passivation Performance during Anaerobic Digestion of Pig Manure and Corn Straw

Effects of Inorganic Passivators on Gas Production and Heavy Metal Passivation Performance during Anaerobic Digestion of Pig Manure and Corn Straw

Improving the Biogas Production and Methane Yield in a UASB Reactor with the Addition of Sulfate

Analysis of the characteristics of innovation in highly cited papers: A case study of highly cited papers published in comprehensive agricultural science core journals in China

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