Correlating bacterial and archaeal community with efficiency of a coking wastewater treatment plant employing anaerobic-anoxic-oxic process in coal industry

Ban, Qiaoying; Zhang, Liguo; Li, Jianzheng

doi:10.1016/j.chemosphere.2021.131724

Cited by 16 publications

(2 citation statements)

References 80 publications

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“…It is worth mentioning that the archaeal Euryarchaeota were the most abundant. This phylum participates in carbon conversion during anaerobic digestion and gener-ates methane [61]. Microbial diversity at genus level indicates that most of the produced methane results from acetate reduction since the relative abundance of acetoclastic Methanosaeta sp.…”

Section: Microbial Community 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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Section: Microbial Community 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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“…Pollution problems associated with CCI need to be urgently addressed, as coal is used to produce energy in a variety of industrial processes [2]. Environmental problems related to CCI sites can be roughly divided into three categories: (1) gaseous waste production, including CO 2 , a greenhouse gas [3,4], methanol [5], and coke oven gas [6]; (2) wastewater production, including coking wastewater [7] and high-salt wastewater [7][8][9][10][11][12]; and (3) soil pollutants, including soil PAHs [13][14][15] and heavy metals [16,17]. Among the three types of CCI pollution, pollution of soil, which is the ultimate receptor of all types of pollutants, is characterized by long contamination times and complex environmental media, and the remediation technologies for soil pollution are underdeveloped.…”

Section: Introductionmentioning

confidence: 99%

An Assessment Framework for Human Health Risk from Heavy Metals in Coal Chemical Industry Soils in Northwest China

Wang,

Zhao,

et al. 2023

Sustainability

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Coal chemical industry (CCI) sites are characterized by complex environmental media, combined heavy metal pollution, and diverse exposure routes. However, existing human health risk assessment (HHRA) methods have multiple drawbacks, such as their small scope of application, limited assessment factors, and insufficient case applications. After 128 soil samples were collected, the contents of Be, V, Ni, Cu, Zn, As, Cd and Hg in the soils were analyzed based on general risk assessment guideline of China. Then, risk levels were calculated based on oral ingestion, skin contact and inhalation as the main exposure routes to compare and screen priority heavy metals. Furthermore, control values were identified through a contribution rate calculation model when CR > 10−6 or HQ > 1. As reference values, risk thresholds were proposed for heavy metals, and then a soil HHRA framework for the CCI site was constructed. Under the three exposure routes, the total CR was As > 10−6, and the total HQ was 1 > As > Cd; the HHRs related to As and V via the oral ingestion, dermal contact, and inhalation pathways were 76.67%, 13.13%, and 10.18% and 1.66%, 0, and 98.34%, respectively. The risk control value of As was 1.59 mg/kg and that of V was 25.1 mg/kg. Based on these results, the threshold values for priority heavy metals should be based on comprehensive considerations of the elemental background of a specific area, the contaminant criteria in different areas, the regional industrial development plan, and the most important control criterion, as well as the control value. Through the development of an HHRA framework and case verification, the authors of this article aim to guide CCI managers in screening priority heavy metals, formulating protection measures, developing improved operational procedures and improving the HHRA system for polluted CCI sites.

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Effects of ultraviolet radiation on microorganism and nitrogen metabolism in sewage under plateau background

Chen

Hao²,

Yongli³

et al. 2023

Environ Sci Pollut Res

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Correlating bacterial and archaeal community with efficiency of a coking wastewater treatment plant employing anaerobic-anoxic-oxic process in coal industry

Cited by 16 publications

References 80 publications

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

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

An Assessment Framework for Human Health Risk from Heavy Metals in Coal Chemical Industry Soils in Northwest China

Effects of ultraviolet radiation on microorganism and nitrogen metabolism in sewage under plateau background

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