Biodesulfurization of sulfide wastewater for elemental sulfur recovery by isolated Halothiobacillus neapolitanus in an internal airlift loop reactor. (September 2018)

• Record Type: Journal Article
• Authors: Feng, Shoushuai; Lin, Xu; Tong, Yanjun; Huang, Xing; Yang, Hailin
• Is Part Of: Bioresource technology. Volume 264(2018)
• Page Start: 244
• Page End: 252
• Publication Date: 2018-09
• Subjects: Biodesulfurization -- Sulfide wastewater -- Sulfur recovery -- Gene transcription -- Community structure -- IALR; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.05.079
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A novel technology was proposed for biodesulfurization of sulfide wastewater. The flocculant producer Pseudomonas sp. was used to precipitate the elemental sulfur. The expression of sqr, sat and cytochrome C increased under higher sulfide stress. The community structure was optimized by microbial intervention in biodesulfurization. S 2− removal efficiency and S 0 recovery was improved by 32.5% and 28.2%, respectively. Abstract: The biodesulfurization of sulfide wastewater for elemental sulfur recovery by isolated Halothiobacillus neapolitanus in an internal airlift loop reactor (IALR) was investigated. The flocculant producer Pseudomonas sp. strain N1-2 was used to deposit the produced elemental sulfur during biodesulfurization. The functional group analysis indicated that biofloculation was closely associated with NH and CO. The biodesulfurization system performed well under moderate water quality fluctuations (1.29–3.88 kg·m −3 ·d −1 COD; 1.54–3.08 kg·m −3 ·d −1 ·S 2− ) as it maintained stable S 2− removal and sulfur flocculation rates. Meanwhile, the qRT-PCR analysis indicated that the transcriptional level of cbbL decreased in the presence of organic carbon, while the expressions of sqr, sat, and cytochrome C3 increased under higher sulfide stress. Moreover, the relative proportions of Halothiobacillus was strengthened via microbial intervention of the LJN1-3 strain. The S 2− removal efficiency and elemental sulfur production was further improved by 32.5% and 28.2%, respectively, in an IALR.