High-rate nitrogen and phosphorus removal in a sulfur and pyrrhotite modified foam concrete constructed wetland

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2024-12-20 DOI:10.1016/j.biortech.2024.132008

Yiming Bu, Ming Song, Gaopan Huang, Changxin Chen, Ruihua Li

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引用次数: 0

Abstract

In order to develop constructed wetland (CW) with high-rate N and P removal, sulfur and pyrrhotite modified foam concrete (SPFC) was prepared and used as a substrate to construct CW (SPFC-CW). At hydraulic retention time 6 h, SPFC-CW achieved effluent total nitrogen (TN) 9.96 mg/L and PO43--P 0.11 mg/L as influent TN and PO43--P were 24.52 and 1.04 mg/L, respectively. TN and PO43--P removal rates of SPFC-CW were 21.8 and 1.4 g/m2d, respectively. Many precipitates with high content of Ca and P attached on SPFC. Sulfurimonas was the most dominant bacterium, and its relative abundances at upper, middle and bottom of SPFC-CW were 53.8 %, 68.4 % and 87.3 %, respectively. SPFC could slowly release Sn2- and S2O32-, which had higher autotrophic denitrification rate than pyrrhotite and sulfur, and more Ca2+ than foam concrete. In SPFC-CW sulfur autotrophic denitrification and Ca-P precipitation were the major N and P removal processes, respectively.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.