{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,29]],"date-time":"2025-12-29T11:39:42Z","timestamp":1767008382239,"version":"build-2065373602"},"reference-count":39,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,13]],"date-time":"2023-01-13T00:00:00Z","timestamp":1673568000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"JSPS KAKENHI","award":["20K04749","4"],"award-info":[{"award-number":["20K04749","4"]}]},{"name":"Ministry of Land, Infrastructure, Transport and Tourism","award":["20K04749","4"],"award-info":[{"award-number":["20K04749","4"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Hydrogen sulfide (H2S) generated in sewer systems is problematic to public health and the environment, owing to its corrosive consequences, odor concerns, and poison control issues. In a previous work, conductive concrete, based on amorphous carbon with a mechanism that operates as a microbial fuel cell was investigated. The objective of the present study is to develop additional materials for highly conductive concrete, to mitigate the concentration of H2S in sewer pipes. Adsorption experiments were conducted to elucidate the role of the H2S reduction. Additionally, electricity-producing bacteria (EPB), isolated from a municipal wastewater treatment plant, were inoculated to improve the H2S reduction. The experimental results showed that inoculation with EPB could decrease the concentration of H2S, indicating that H2S was biologically oxidized by EPB. Several types of new materials containing acetylene black, or magnetite were discovered for use as conductive concrete, and their abilities to enhance the biological oxidation of H2S were evaluated. These conductive concretes were more effective than the commercial conductive concrete, based on amorphous carbon, in decreasing the H2S concentration in sewer pipes.<\/jats:p>","DOI":"10.3390\/ijerph20021459","type":"journal-article","created":{"date-parts":[[2023,1,13]],"date-time":"2023-01-13T02:29:57Z","timestamp":1673576997000},"page":"1459","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Enhancing the Biological Oxidation of H2S in a Sewer Pipe with Highly Conductive Concrete and Electricity-Producing Bacteria"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0868-2064","authenticated-orcid":false,"given":"Huy Thanh","family":"Vo","sequence":"first","affiliation":[{"name":"Faculty of Urban Engineering, Mientrung University of Civil Engineering, Tuy Hoa 620000, Vietnam"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8891-0564","authenticated-orcid":false,"given":"Tsuyoshi","family":"Imai","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi 7558611, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masato","family":"Fukushima","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi 7558611, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kanathip","family":"Promnuan","sequence":"additional","affiliation":[{"name":"Department of Biotechnology, Faculty of Technology, Khon Kaen University, Khon Kaen 40002, Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tasuma","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi 7558611, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiraku","family":"Sakuma","sequence":"additional","affiliation":[{"name":"Nagasaki Humepipe Industry Co., Ltd., Ibaraki 3000051, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takashi","family":"Hitomi","sequence":"additional","affiliation":[{"name":"Nagasaki Humepipe Industry Co., Ltd., Ibaraki 3000051, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2472-7357","authenticated-orcid":false,"given":"Yung-Tse","family":"Hung","sequence":"additional","affiliation":[{"name":"Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH 44115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,13]]},"reference":[{"key":"ref_1","unstructured":"US EPA (2023, January 08). 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