Le Chen , Muhammad Zubair , Guangming Zhang , Jinsong Liang , Panyue Zhang , Ying Li
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引用次数: 0
Abstract
Addressing the challenge of enhancing anaerobic wastewater treatment containing sulfate is a pressing concern. Adding quorum sensing signaling molecule N-acyl-homoserine lactones (AHLs) is beneficial for improving anaerobic treatment performances. Previous studies focused on the impact of AHL addition on microbial communities, the role of AHL addition in functional metabolism and interspecies electron transfer (IET) is poorly understood. This study delved into the roles of AHLs in anaerobic wastewater treatment containing sulfate. AHLs expedited COD degradation and improved methane production, with a 15.49 % increase in methane production with 20 μM AHL addition. AHL addition enhanced electron transport system activity by 28.02 % and specific methanogenic activity by 22.61 %, suggesting an enhancement in microbial activity and methanogenic capability. Taxonomic analysis revealed the facilitation of AHL addition on symbiotic relationships between acidifying bacteria and methanogens. KEGG annotations highlighted upregulation of genes associated with key enzymes in acidification, sulfate reduction, and methanogenesis with AHL addition. AHLs also bolstered syntrophic metabolism by upregulating genes involved in IET processes, including H2 production and utilization, riboflavin synthesis and secretion, and conductive pili assembly and synthesis. This study bridges gaps in understanding the influence of AHL addition on microbial metabolism and electron transfer.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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