Sludge composition and characteristics shaped microbial community and further determined process performance: A study on full-scale thermal hydrolysis-anaerobic digestion processes

Liu, Wei; Sun, Chenxiang; Li, Wei; Li, Tianle; Chen, Zhan; Wang, Jiawei; Ren, Zhengran; Wen, Xianghua

doi:10.1016/j.jes.2022.12.032

Cited by 10 publications

(2 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, sludge pretreatment technology is primarily classified into physical, chemical, and biological method based on their respective mechanisms. Physical methods involve mechanical pretreatment, 10 thermal hydrolysis, 11 ultrasonic pretreatment, 12 and so forth. Chemical methods include acidolysis, oxidation treatment, 13 and alkaline treatment 14 .…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Chuanchuan,

Yuling,

Shuaishuai

et al. 2024

Env Prog and Sustain Energy

View full text Add to dashboard Cite

This article systematically explores the strengthening effect of NaOH dosage on the fermentation acid production of Waste Activated Sludge (WAS) by the rhamnolipids‐alkali‐thermal combined pretreatment. Analyzed the dissolution characteristics of organic matter in sludge, changes in total volatile fatty acids (VFAs) content and components, and microbial community structure. Research has shown that increasing the amount of NaOH can promote the dissolution of sludge extracellular polymeric substances (EPS) and cell lysis. When NaOH dose was 60 mg/g VS, the dissolution of SCOD was the largest, reaching 5427.78 mg/L. It provides high‐quality substrate for anaerobic flora through the decomposition of refractory humus‐like substances and macromolecular substances, thus improving the production of VFAs. When NaOH dose was 80 mg/g VS, the maximum VFAs yield was 1663.76 mg C/L, and the fermentation type was butyric acid. The increase of NaOH dose promotes the effective enrichment of bacteria, and the dominant bacteria are Proteobacteria, Firmicutes, and Bacteroides at the gate level, with different abundance. The fermentation time plays a decisive role in the evolution of microbial population, and the increase of NaOH dose promotes the enrichment of acid‐producing bacteria, thus improving the production of VFAs.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Chuanchuan,

Yuling,

Shuaishuai

et al. 2024

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Temperature influences numerous parameters of chemical, physical and biochemical reactions (in particular gas solubility, dissociation, equilibrium constants, partial pressure of water vapor at saturation, density of wet gas, viscosity and diffusion) [11]. Additionally, a stable AD process requires an active microbial community, whereby the milieu conditions such as temperature, pH, substrate concentration and composition, as well as toxic and inhibitory components, influence the structure of the community and the entire degradation process [12][13][14]. Temperature's influence on the biological processes is shaped by both the activity and growth of different groups of microorganisms and the enzyme activities, enzyme reactions and substrate diffusion rates which might differently respond to chosen temperature levels [15].…”

Section: Introductionmentioning

confidence: 99%

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Steiniger,

Hupfauf,

Insam

et al. 2023

Fermentation

View full text Add to dashboard Cite

Digesters at water resource recovery facilities (WRRFs) operating at different temperatures within the mesophilic and thermophilic temperature range is a flexibilization concept to contribute to heat management. Four 25 L digesters were fed with sewage sludge from a municipal WRRF and were operated at 37, 43, 47 and 53 °C, respectively, to describe changes in the overall process performance and the microbiota. Specific methane yield and COD degradation rates were the highest at 47 °C, only being up to 7% higher compared with at 37 °C. The increase in pH and concentrations of NH4-N and PO4-P above 43 °C were statistically significant. The effect on the microbial community was strong, indicating both a constant specialization towards thermophilic organisms as well as a change from acetoclastic to hydrogenotrophic/methylotrophic methanogenesis. The influence of temperature on process-engineering and physicochemical aspects was rather small compared with the changes in the microbiota.

show abstract

Food waste impact on dry anaerobic digestion of straw in a novel reactor: Biogas yield, stability, and hydrolysis-methanogenesis processes

Chen,

He,

Zhu

et al. 2024

Bioresource Technology

View full text Add to dashboard Cite

Sludge composition and characteristics shaped microbial community and further determined process performance: A study on full-scale thermal hydrolysis-anaerobic digestion processes

Cited by 10 publications

References 37 publications

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Study on the effect of alkali on the production of volatile fatty acids from rhamnolipid‐alkali‐thermal pretreated waste activated sludge

Exploring Anaerobic Digestion from Mesophilic to Thermophilic Temperatures—Operational and Microbial Aspects

Food waste impact on dry anaerobic digestion of straw in a novel reactor: Biogas yield, stability, and hydrolysis-methanogenesis processes

Contact Info

Product

Resources

About