Enhancement of volatile fatty acid production by co-fermentation of food waste and excess sludge without pH control: The mechanism and microbial community analyses

Wu, Qinglian; Guo, Wei; Hong, Zheng; Luo, Haichao; Feng, Xiaochi; Yin, Renli; Ren, Nanqi

doi:10.1016/j.biortech.2016.06.006

Cited by 175 publications

(50 citation statements)

References 34 publications

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“…For example, propionic acid is used as a food preservative and plasticizer; butyric acid an important chemical raw material and its derivatives are widely used in the chemical industry, food, medicine, and feed industry . In addition, food waste, cattle slaughterhouse waste and various kinds of corps, e.g, corn straw have been used for co‐fermentation with sludge for high yield of VFAs . The high yield and efficiency of VFAs production helps realize sludge valorization.…”

Section: Strategies Of Sludge Valorizationmentioning

confidence: 99%

“…38 In addition, food waste, cattle slaughterhouse waste and various kinds of corps, e.g, corn straw have been used for co-fermentation with sludge for high yield of VFAs. [39][40][41] The high yield and efficiency of VFAs production helps realize sludge valorization. CH 4 is another form of carbon resource which can be recovered from municipal sludge via the AD process.…”

Section: Introductionmentioning

confidence: 99%

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Strategies of valorization of sludge from wastewater treatment

Sheng

Zhang

2018

J of Chemical Tech & Biotech

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Sludge is regarded as a potential source to achieve valorization via strategies such as resource recovery, sludge based adsorbents preparation, bioflucculants production, sludge manufacturing construction materials preparation, sludge composting and thermal valorization, which are currently common and effective strategies. Appropriate treatment strategies of sludge are of great importance worldwide for the fast growing population and rapidly increasing waste. This mini review summarized some widely used and effective strategies to achieve sludge valorization based on whether the strategy would utilize or reuse the potential of sludge to obtain valuable product and eliminate secondary pollution. Anaerobic digestion of sludge is perceived as a potentially cost‐effective method to achieve sludge reduction and resource recovery including carbon, nitrogen, phosphorus resource recovery coupled with other technologies. Utilizing sludge as raw material for preparation of valuable products including sludge based adsorbents, bioflocculants and construction materials is another aspect to achieve sludge valorization. Sludge composting and thermal valorization are also introduced in the mini review since the two strategies could also achieve sludge valorization. In addition, the strategies mentioned were discussed and analyzed in the mini review from environmental and economic aspects. © 2017 Society of Chemical Industry

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Section: Strategies Of Sludge Valorizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strategies of valorization of sludge from wastewater treatment

Sheng

Zhang

2018

J of Chemical Tech & Biotech

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“…Unlike when only the V4‐V5 of 16S rDNA was amplified in the previous study (Jiang et al, ; Madigou, Poirier, Bureau, & Chapleur, ), the full length of 16S rDNA (1,600 bp) in bacteria and 18S rDNA‐ITS (2,200 bp) in fungi were amplified; thus, the microbiota can be analyzed at the species level. PCR amplification and product purification were carried out according to previous reports (Liu, Liu, El‐Rotail, et al, ; Liu, Liu, Xiao, et al, ; Wu et al, ). The library construction and sequencing process were carried out according to the protocol of PacBio RS II (Pacific Biosciences, CA) (Eid et al, ; McCarthy, ).…”

Section: Methodsmentioning

confidence: 99%

Effect of Chinese rice wine sludge on the production of Chinese steamed buns

Ai‐lati

Liu

et al. 2018

J Food Process Preserv

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Chinese rice wine sludge (CRWS), analogous to beer yeast sludge, is the filter cake remaining after squeezing the fermentation mash of Chinese rice wine. CRWS contains high levels of protein (44.74%), nonstructural carbohydrates (37.33%), crude fiber (13.5%), and essential amino acids, which could enhance the trophic value of Chinese steamed buns. In our research, the microbiota of CRWS (mainly Saccharomyces cerevisiae and Lactobacillus sp.) was analyzed at the species level by single‐molecule real‐time DNA sequencing technology. Interestingly, the microbiota of CRWS was similar to that of the starter dough typically used to prepare Chinese steamed buns. Incorporation of CRWS significantly influenced the pasting properties and farinograph characteristics of the dough, which control the texture of the Chinese steamed buns, and supplementation with 5∼30% CRWS caused the properties of the resulting buns to be more similar to those of northern‐style steamed buns. CRWS addition also significantly enhanced the content of aroma compounds in the Chinese steamed buns. Practical applications In China, approximately three million tons of CRWS is produced per year, and the reutilization of CRWS is a challenge faced by the Chinese rice wine industry. Meanwhile, Chinese steamed buns prepared with CRWS are becoming increasingly popular, and CRWS has been used in the preparation of homemade Chinese steamed buns. However, the use of CRWS in the industrial production of Chinese steamed buns has not yet been developed. The productive use of CRWS could have substantial economic benefits. In this study, the effect of CRWS incorporation on Chinese steamed buns is reported for the first time. The results showed that CRWS improved the quality of Chinese steamed buns. The results of this study suggest a simple and convenient method for incorporating CRWS into the industrial production of northern‐style Chinese steamed buns.

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“…So, the content of microbial cells is released into the sludge liquid, and thus it is more readily available for microbial degradation 14 . It was observed that thermal hydrolysis replaced the stage of hydrolysis in the process of mesophilic anaerobic digestion 3 , caused increase in methane production and cut down time of AD 15- 18 . Effectiveness of the individual methods of pretreatment is different and depends on many factors.…”

Section: 11mentioning

confidence: 99%

Effect of the two-stage thermal disintegration and anaerobic digestion of sewage sludge on the COD fractions

Ciaciuch

Gaca

Lelewer

2017

Polish Journal of Chemical Technology

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The research presents the changes in chemical oxygen demand (COD) fractions during the two-stage thermal disintegration and anaerobic digestion (AD) of sewage sludge in municipal wastewater treatment plant (WWTP). Four COD fractions have been separated taking into account the solubility of substrates and their susceptibility to biodegradation: inert soluble organic matter SI, readily biodegradable substrate SS, slowly biodegradable substrates XS and inert particulate organic material XI. The results showed that readily biodegradable substrates SS (46.8% of total COD) and slowly biodegradable substrates XS (36.1% of total COD) were dominant in the raw sludge effl uents. In sewage effl uents after two-stage thermal disintegration, the percentage of SS fraction increased to 90% of total COD and percentage of XS fraction decreased to 8% of total COD. After AD, percentage of SS fraction in total COD decreased to 64%, whereas the percentage of other fractions in effl uents increased.

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Enhancement of volatile fatty acid production by co-fermentation of food waste and excess sludge without pH control: The mechanism and microbial community analyses

Cited by 175 publications

References 34 publications

Strategies of valorization of sludge from wastewater treatment

Strategies of valorization of sludge from wastewater treatment

Effect of Chinese rice wine sludge on the production of Chinese steamed buns

Effect of the two-stage thermal disintegration and anaerobic digestion of sewage sludge on the COD fractions

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