globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2019.01.016
Scopus ID: 2-s2.0-85060858562
Effect of poly aluminum chloride on dark fermentative hydrogen accumulation from waste activated sludge
Author: Wu Y.; Wang D.; Liu X.; Xu Q.; Chen Y.; Yang Q.; Li H.; Ni B.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2019
pages begin: 217
pages end: 228
Language: 英语
Keyword: Dark fermentation ; Hydrogen production ; PAC ; Sludge treatment
Scopus Keyword: Alkalinity ; Aluminum chloride ; Chlorine compounds ; Fatty acids ; Fermentation ; Picture archiving and communication systems ; Propionic acid ; Sols ; Anaerobic fermentation ; Dark fermentation ; Hydrogen production rate ; Propionic acid fermentation ; Short-chain fatty acids ; Sludge treatment ; Volatile suspended solids ; Waste activated sludges ; Hydrogen production ; aluminum chloride ; butyric acid ; coagulating agent ; dextran ; glucose ; hydrogen ; nitrogen ; poly aluminum chloride ; polymer ; propionic acid ; short chain fatty acid ; sulfate ; unclassified drug ; activated sludge ; anoxic conditions ; bacterium ; chemical compound ; coagulation ; experimental study ; fatty acid ; fermentation ; hydrogen ; inhibition ; microbial activity ; polymer ; reduction ; sludge ; waste treatment ; activated sludge ; anaerobic fermentation ; Article ; chemical oxygen demand ; Clostridium ; Desulfobulbus ; fermentation ; hydrolysis ; microbial community ; priority journal ; Proteiniclasticum ; Rhodobacter ; solubilization ; suspended particulate matter ; Desulfobulbus
English Abstract: Poly aluminum chloride (PAC), an inorganic coagulant being accumulated in waste activated sludge (WAS) at substantial levels, are generally thought to inhibit WAS anaerobic fermentation. However, its effect on dark fermentative hydrogen accumulation has not been documented. This work therefore aimed to explore its effect on hydrogen accumulation and to elucidate the mechanism of how PAC affects hydrogen accumulation. Experimental results showed that with an increase of PAC addition from 0 to 20 mg Al per gram of total suspended solids (TSS), the maximal hydrogen yield from alkaline fermentation (pH 9.5) increased from 20.9 mL to 27.4 mL per gram volatile suspended solids (VSS) under the standard condition. Further increase of PAC to 30 mg Al/g TSS didn't cause a significant increase of hydrogen yield (p > 0.05). The mechanism explorations revealed that although PAC reduced the total short-chain fatty acid (SCFA) production, this reduction was mainly enforced to propionic acid fermentation type, which did not contribute hydrogen production. PAC suppressed all the microbial processes relevant to anaerobic fermentation to some extents, but its inhibition to hydrogen consumption was much severer than that to hydrogen production. Illumina Miseq sequencing analysis revealed that PAC did not affect the populations of SCFA and hydrogen producers, but the two hydrogen consumers, Acetoanaerobium and Desulfobulbus, were almost washed out by PAC. Among the three types of Al species present in the anaerobic fermentation systems, Ala (monomeric species) significantly affected the maximal hydrogen production potential while Alb (medium polymer species) and Alc (species of sol or gel) posed impacts on hydrogen production rate and the lag time. © 2019 Elsevier Ltd
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被引频次[WOS]:14   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China; School of Energy Science and Engineering, Central South University, Changsha, 410083, China; School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China

Recommended Citation:
Wu Y.,Wang D.,Liu X.,et al. Effect of poly aluminum chloride on dark fermentative hydrogen accumulation from waste activated sludge[J]. Water Research,2019-01-01
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