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Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation
Geng, Shixiong1,2; Song, Kang1; Li, Lu1; Xie, Fazhi2
2020-03-24
Source PublicationACS OMEGA
ISSN2470-1343
Volume5Issue:11Pages:6146-6152
Abstract

This study investigated the methane production improvement of algal sludge by zerovalent iron (ZVI)-assisted anaerobic digestion. The zerovalent iron added were 0.5, 2, 5, 10, and 20 g center dot ZVI/g center dot TS (total solid). The results indicated that the addition of ZVI at 2, 5, 10, and 20 g center dot ZVI/g center dot TS has improved the methane production 1.07, 1.24, 1.41, and 1.46 times as compared with no ZVI added. The dewaterability of treated algal sludge has improved 1.06, 1.08, 1.08, and 1.11 times as compared with no ZVI addition. The biochemical methane production test results fitted to both one-substrate and two-substrate models. The one-substrate model indicated that the hydrolysis rate k has increased 8.21, 7.07, 9.39, 3.50, and 5.07 times as compared with R1 where no ZVI was added. The two-substrate model implied that the rapid hydrolysis rate k(rapid) values were 5.23, 4.5, 5.98, 2.23, and 3.23 times as compared with RI. The one-substrate model predicted that the value of methane production was in high correlation with the actual value (R-2 > 0.98). The addition of ZVI in algal sludge for methane production without an extra pretreatment process has improved the hydrolysis rate and methane production. This has the potential to be developed as an effective and economic technology in resource recovery from algal sludge.

DOI10.1021/acsomega.0c00174
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000521782400064
WOS KeywordWASTE-ACTIVATED-SLUDGE ; ZERO-VALENT IRON ; FREE NITROUS-ACID ; ANAEROBIC-DIGESTION ; METHANOGENIC ACTIVITY ; PRETREATMENT ; HEAT ; MECHANISMS ; HYDROGEN ; IMPACT
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/35879
Collection水环境工程研究中心_期刊论文
Corresponding AuthorLi, Lu
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Anhui Jianzhu Univ, Sch Mat Sci & Chem Engn, Hefei 230022, Peoples R China
Recommended Citation
GB/T 7714
Geng, Shixiong,Song, Kang,Li, Lu,et al. Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation[J]. ACS OMEGA,2020,5(11):6146-6152.
APA Geng, Shixiong,Song, Kang,Li, Lu,&Xie, Fazhi.(2020).Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation.ACS OMEGA,5(11),6146-6152.
MLA Geng, Shixiong,et al."Improved Algal Sludge Methane Production and Dewaterability by Zerovalent Iron-Assisted Fermentation".ACS OMEGA 5.11(2020):6146-6152.
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