Effects of green waste participation on the co-digestion of residual sludge and kitchen waste: A preliminary study

Chen, Yongdong; Zhu, Ruilin; Jiang, Qin; Sun, Tong; Li, Mingxing; Shi, Jingxin; Chai, Hongxiang; Gu, Li; Ai, Hainan; He, Qiang

doi:10.1016/j.scitotenv.2019.03.339

Cited by 72 publications

(16 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where C represents degradation ratio of different kind of lignocellulosic component (%) among all digesters due to WS's organic composition and specific lignocellulosic texture, which has been discussed adequately in previous study [22]. In this study, hydrolysis of substrates was much more focused than biogas yield, thus Fitzhugh model and modified Gompertz model were applied, and the obtained kinetic fitting results were shown in Table 3.…”

Section: Kinetic Studymentioning

confidence: 93%

Hydrolytic performances of different organic compounds in different lignocellulosic biomass during anaerobic digestion

Yang¹,

Deng

Jin³

et al. 2021

Environmental Engineering Research

View full text Add to dashboard Cite

Hydrolytic performances of different organic compounds in lignocellulosic biomass (LB) during anaerobic digestion (AD) are worth investigating due to the complex and refractory structure of lignocellulose. This study aimed to clarify the hydrolytic performances of different lignocellulosic components (hemicellulose, cellulose and lignin) and other typical organics (saccharides, protein and lipid) in AD process. Furthermore, an in-depth study of different lignocellulosic components mono-/co-digestive performances, as well as their effects on digestive systems were also designed to explain the mechanism. Kinetic models were specially applied to evaluate the hydrolytic process and make comparison among different lignocellulosic components. Results showed that hemicellulose obtained high degradation ratio (77.2-85.0%) during anaerobic digestion, while cellulose was difficult to hydrolyze without sufficient acidity. And organics (saccharides, protein and lipid) were much easier to be hydrolyzed than lignocellulose. Results also depicted that lignocellulose addition could efficiently enhance the volatile solid (VS) removals of digestive systems, while lignin existing in systems reduced the VS removal. The limited hydrolysis of lignocellulose hindered the degradation of total VS in digester. It is quite important to obtain high bioenergy conversion, pretreatments, which can destroy the lignin wrapping in LBs digestion. This study could provide a reference for the AD of LBs.

show abstract

Section: Kinetic Studymentioning

confidence: 93%

Hydrolytic performances of different organic compounds in different lignocellulosic biomass during anaerobic digestion

Yang¹,

Deng

Jin³

et al. 2021

Environmental Engineering Research

View full text Add to dashboard Cite

show abstract

“…Microbial testing services (DNA extraction and PCR amplification, Illumina MiSeq sequencing and processing of sequencing data) were supported by Majorbio Bio-PharmTechnology (Shanghai) Co. Ltd., and specific methods have been shown in our previous study [1].…”

Section: Methodsmentioning

confidence: 99%

“…With the rapid development of urbanization, more and more excessive waste activated sludge (WAS) are produced in wastewater treatment process, and it was reported that 55 million tons of sewage sludge (80% moisture) were generated from urban wastewater treatment plants (WWTPs) in China in 2018 [1]. How to sustainably handle these sludge is now becoming a public concern and global environmental challenge [2, 3].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of performance and stability of anaerobic co-digestion of waste activated sludge and kitchen waste by using bentonite

et al. 2019

Self Cite

View full text Add to dashboard Cite

There are large amounts of waste activated sludge (WAS) and kitchen waste (KW) produced every year in China. It has been confirmed that anaerobic co-digestion is an effective method to solve this problem. The targets of the present study were optimizing the digestive performances and clearing of the mechanism of bentonite addition by adding bentonite into digestive system. Group M (WAS: KW = 1:2, based on VS) presented higher cumulative methane yield (CMY), where the CMY increased from 19.8 to 36.3 mL/g VS with the bentonite dosage from 0 to 2 g/g VS. After bentonite addition, the lag phase of every digester presented an obvious decrease from 15.1 to 1.4 d. Furthermore, and the moderating effects on microbial community by bentonite. The addition of bentonite improved methane production, and it can also reduce the lag phase of methane production in co-digestion. What's more, bentonite addition increased the speed of pH recovery from 4.2–4.8 to normal level (7.0–8.0) and thus enhanced the system stability. The conclusion of this study can be used to guide practical engineering.

show abstract

“…The disposal of WAS has become a global problem. The yield of WAS had reached or even exceeded the environmental load, which increased environmental risks and disposal costs ( Sun et al, 2015 ; Chen et al, 2019 ; He et al, 2019 ; Zhang et al, 2019 ). In recent years, carbon recovery in anaerobic fermentation has attracted wide attention ( Cheng et al, 2020 ; Pang et al, 2020d ).…”

Section: Introductionmentioning

confidence: 99%

Effect of NaCl Concentration on Microbiological Properties in NaCl Assistant Anaerobic Fermentation: Hydrolase Activity and Microbial Community Distribution

Pang

Xin

et al. 2020

Front. Microbiol.

View full text Add to dashboard Cite

Previous studies have demonstrated that sludge hydrolysis and short-chain fatty acids (SCFAs) production were improved through NaCl assistant anaerobic fermentation. However, the effect of NaCl concentrations on hydrolase activity and microbial community structure was rarely reported. In this study, it was found that α-glucosidase activity and some carbohydrate-degrading bacteria were inhibited in NaCl tests, owing to their vulnerability to high NaCl concentration. Correspondingly, the microbial community richness and diversity were reduced compared with the control test, while the evenness was not affected by NaCl concentration. By contrast, the protease activity was increased in the presence of NaCl and reached the highest activity at the NaCl concentration of 20 g/L. The protein-degrading and SCFAs-producing bacteria (e.g., Clostridium algidicarnis and Proteiniclasticum ) were enriched in the presence of NaCl, which were salt-tolerant.

show abstract

Effects of green waste participation on the co-digestion of residual sludge and kitchen waste: A preliminary study

Cited by 72 publications

References 40 publications

Hydrolytic performances of different organic compounds in different lignocellulosic biomass during anaerobic digestion

Hydrolytic performances of different organic compounds in different lignocellulosic biomass during anaerobic digestion

Enhancement of performance and stability of anaerobic co-digestion of waste activated sludge and kitchen waste by using bentonite

Effect of NaCl Concentration on Microbiological Properties in NaCl Assistant Anaerobic Fermentation: Hydrolase Activity and Microbial Community Distribution

Contact Info

Product

Resources

About