{"title":"Phosphorus recovery from domestic wastewater via Candida tropicalis: Performance and mechanism","authors":"Xiao Yan , Xiaoying Zhang , Ruixi Wang, Jishi Zhang, Zhengyi Zhang","doi":"10.1016/j.jwpe.2024.106404","DOIUrl":null,"url":null,"abstract":"<div><div>There is a widespread concern regarding the contradiction between the increasing scarcity of phosphate ore resources and the urgency of removing phosphorus from wastewater. In this study, a maximum of 168.33 mg of phosphorus was removed per gram of <em>Candida tropicalis</em> (<em>C. tropicalis</em>). The optimal fermentation conditions for phosphorus removal by <em>C. tropicalis</em> were determined through single-factor and orthogonal experiments. Phosphorus removal was up to >80 % under the conditions of glucose as sole carbon source, 60 rpm, dissolved oxygen of 7.0 mg/L, C/P of 100, N/P of 3.5, pH of 6.0, and temperature of 30 °C. 50 %–62 % and 38 %–50 % of phosphorus were transferred to yeast cells and extracellular polymers, respectively. Transcriptome analysis revealed unregulated genes of <em>sat</em>, <em>cysH</em> and <em>cysJ</em> in the sulfur metabolism under anaerobic conditions, with glutathione serving as a sulfur reservoir. A rational pathway for phosphorus metabolism was proposed, revealing phosphorus could be stored in its cells as polyphosphate under aerobic and anaerobic conditions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"68 ","pages":"Article 106404"},"PeriodicalIF":6.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714424016362","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
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Abstract
There is a widespread concern regarding the contradiction between the increasing scarcity of phosphate ore resources and the urgency of removing phosphorus from wastewater. In this study, a maximum of 168.33 mg of phosphorus was removed per gram of Candida tropicalis (C. tropicalis). The optimal fermentation conditions for phosphorus removal by C. tropicalis were determined through single-factor and orthogonal experiments. Phosphorus removal was up to >80 % under the conditions of glucose as sole carbon source, 60 rpm, dissolved oxygen of 7.0 mg/L, C/P of 100, N/P of 3.5, pH of 6.0, and temperature of 30 °C. 50 %–62 % and 38 %–50 % of phosphorus were transferred to yeast cells and extracellular polymers, respectively. Transcriptome analysis revealed unregulated genes of sat, cysH and cysJ in the sulfur metabolism under anaerobic conditions, with glutathione serving as a sulfur reservoir. A rational pathway for phosphorus metabolism was proposed, revealing phosphorus could be stored in its cells as polyphosphate under aerobic and anaerobic conditions.
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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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