Journal ArticleDOI
Improvement of anaerobic co-digestion of plant waste and excess sludge using calcium peroxide.
TLDR
In this paper, the mixed proportion of plant waste and excess sludge co-digestion was optimized at mesophilic temperature, and then the anaerobic co digestion of PW and ES was enhanced with strong oxidant calcium peroxide (CP).Abstract:
Plant waste (PW) and excess sludge (ES) are two main organic matters of municipal solid waste. However, there are few reports on their anaerobic co-digestion. In this work, the mixed proportion of PW and ES anaerobic co-digestion was first optimized at mesophilic temperature, and then the anaerobic co-digestion of PW and ES was enhanced with strong oxidant calcium peroxide (CP). The results showed that the optimal mixing ratio of PW and ES was 1/1 (in terms of volatile solids), the C/N of mixed digestion substrate was 23.5/1, and the maximum methane production was 172.6 mL/g (in terms of volatile solids). CP could enhance methane production from anaerobic co-digestion of PW and ES. When the content of CP was 0.2 g/g (in terms of total suspended solids), the maximum methane production was 234.8 mL/g, about 1.4 times of the blank. The mechanism investigation showed that CP promoted the release of organic matter during the co-digestion, and the higher the content of CP, the greater the release of soluble chemical oxygen demand. The presence of appropriate amount of CP promoted the activities of key enzymes in anaerobic fermentation process, and then increased the efficiency of methane production. The results of this work provide an alternative strategy for the resource utilization of PW and ES.read more
Citations
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Batch and semi–continuous experiments examining the sludge mesophilic anaerobic digestive performance with different varieties of rice straw
TL;DR: In this article , anaerobic co-digestion of excess sludge and different varieties of rice straw including indica rice straw (IRS), japonica rice straw and glutinous rice straw was investigated in batch and semi-continuous experiments.
Journal ArticleDOI
Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste.
TL;DR: The results showed that the optimal dosage of RL was 50 g/kg total suspended solids, and the maximum yield of methane was 198.5 mL/g volatile suspension solids (VSS), which was 2.3 times of that in the control.
Journal ArticleDOI
Alkyl polyglycosides enhanced the dark fermentation of excess sludge and plant waste to produce hydrogen: performance and mechanism
Rurong Jiang,Fang Ren,Jinhua Yao +2 more
Journal ArticleDOI
Integrated poultry waste management by co-digestion with perennial grass: Effects of mixing ratio, pretreatments, reaction temperature, and effluent recycle on biomethanation yield
Chettaphong Phuttaro,Santhana Krishnan,Kanyarat Saritpongteeraka,Boonya Charnnok,Ludo Diels,Sumate Chaiprapat +5 more
TL;DR: In this paper , a series of batch assays, Napier grass (NG) was mixed with chicken manure (CM) at various proportions (100:0, 80:20, 60:40, 50:50, 40:60, 20:80 and 0:100) to identify co-substrate synergism, followed by physiochemical conditioning (size reduction and ultrasonication) of NG before co-digestion.
Journal ArticleDOI
Eco-friendly Oxidation of a Reactive Textile Dye by CaO2: Effects of specific independent parameters.
TL;DR: In this paper , the use of CaO2 in the oxidation of Reactive Black 5 (RB5) was investigated without any activator, and the effects of various independent parameters on the oxidation process were investigated.
References
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Aged refuse enhances anaerobic fermentation of food waste to produce short-chain fatty acids.
TL;DR: In this work, a new technology of intensifying anaerobic fermentation of food waste to accumulate SCFA by using landfill degradation product aged refuse (AR) was reported, and the experimental results showed that AR enhanced the accumulation of SCFA.
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Enhancing the enzymatic digestibility of bamboo residues by biphasic phenoxyethanol-acid pretreatment.
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Thermal-alkaline pretreatment of polyacrylamide flocculated waste activated sludge: Process optimization and effects on anaerobic digestion and polyacrylamide degradation.
Xuran Liu,Qiuxiang Xu,Dongbo Wang,Qi Yang,Yanxin Wu,Yifu Li,Qizi Fu,Fan Yang,Yiwen Liu,Bing-Jie Ni,Qilin Wang,Xiaoming Li +11 more
TL;DR: Mechanism investigations revealed that the pretreatment not only broke the large firm floccules, improved the degradation of PAM, but also facilitated the release of biodegradable organics from sludge, which thereby provided better growth environment and enough nutrients to anaerobic microbes for methane production.
Journal ArticleDOI
Effect of CaO2 addition on anaerobic digestion of waste activated sludge at different temperatures and the promotion of valuable carbon source production under ambient condition.
TL;DR: Predictive functional profiling indicated that microbial hydrolysis, metabolism and acidification were promoted by CaO2 under ambient conditions, and temperature showed a stronger effect thanCaO2 on microbial community structure, but CaO1 addition was more effective than temperature in enhancing hydrolytic and acidifying microorganisms.