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Enhancing anaerobic digestion of sulphate wastewater by adding nano-zero valent iron.
- Source :
- Environmental Technology; Nov2023, Vol. 44 Issue 26, p3988-3996, 9p
- Publication Year :
- 2023
-
Abstract
- In this paper, the effects of nano-zero valent iron (nZVI) on anaerobic digestion of sulphate wastewater with different SO 4 2 − /COD ratios, including the COD removal rate, methane yield, intermediate products and the change of microbial community structure, were investigated. The results showed that nZVI could effectively enhance the treatment efficiency and methane yield. Compared with the control group without nZVI, the methane yield increased from 348.6833 to 1007.05 mL CH<subscript>4</subscript>/gCOD<subscript>removal</subscript> with 4 g nZVI loading at SO 4 2 − /COD = 0.1. nZVI could make electron flow from sulphate reduction to methane production, which increased methane yield even at high sulphate concentration. The microbial community analysis showed that adding nZVI could increase the abundance of acetoclastic methanogens, which accelerated hydrolysis acidification. [ABSTRACT FROM AUTHOR]
- Subjects :
- IRON
SULFATES
SEWAGE
MICROBIAL products
ANAEROBIC digestion
MICROBIAL communities
Subjects
Details
- Language :
- English
- ISSN :
- 09593330
- Volume :
- 44
- Issue :
- 26
- Database :
- Complementary Index
- Journal :
- Environmental Technology
- Publication Type :
- Academic Journal
- Accession number :
- 172441046
- Full Text :
- https://doi.org/10.1080/09593330.2022.2077137