Process performance and microbial interaction in two-stage continuously stirred tank reactors for sludge anaerobic digestion operated at different temperatures
TL;DR: In this article, the authors investigated the effects of temperature on the process performance and microbial community structure of two two-stage CSTRs and found that temperature affects the process by changing the species and relative abundance of fermentation bacteria and methanogens.
About: This article is published in Biochemical Engineering Journal.The article was published on 2020-09-15. It has received 14 citations till now. The article focuses on the topics: Anaerobic digestion & Methanogenesis.
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TL;DR: In this paper, an overview of the microbial responses to the fermentation temperature gradient in each step (including hydrolysis, acidification, and methanogenesis) of the anaerobic digestion process and investigated the mechanism of adaption to extreme temperature regimes.
Abstract: Temperature plays a primary role in anaerobic digestion, since it shapes microbial ecosystems, and consequently regulates the stability performance of anaerobic digestion process. Although changes in microbial community and composition at different temperatures have also previously been discussed in some experimental studies. However, until now, this aspect of the regulation of the temperature gradient on microbial communities have not yet well been reviewed. Additionally, these previous studies did not observe the classical three-peak model regarding methane production rates owing to limitations to the temperature range and the broad gradient interval. Furthermore, some microorganisms that lived at “extreme” temperatures have been reported in some previous studies, it provides a possibility for industrial applications of anaerobic digestion in cold regions or for sanitation purposes on the basis of deciphering the mechanism of their adaption. This survey aims to shove the boundaries a little further summarizing an overview of the microbial responses to the fermentation temperature gradient in each step (including hydrolysis, acidification, and methanogenesis) of the anaerobic digestion process and investigated the mechanism of adaption to extreme temperature regimes. Overall, this review covers discussion on microorganisms’ responses to broad temperature gradient, together with mechanism to adapted extreme temperature by regulating the conformation transition of their DNA, protein, and specialized enzymes.
67 citations
TL;DR: In this paper , the effects of different antibiotics on anaerobic digestion of sewage sludge, including production of methane and volatile fatty acids (VFAs), and discusses the impact of antibiotics on biotransformation processes (solubilization, hydrolysis, acidification, acetogenesis) were determined.
25 citations
TL;DR: In this paper, performance and kinetic analysis of anaerobic moving bed bioreactor (AnMBBR) and up-flow hybrid reactor (UAHR) were investigated for the treatment of synthetic textile desizing wastewater (TDW) under organic loading rate (OLR) of 0.6-12 kgCOD/m3/day at thermophilic temperature (55°C).
14 citations
TL;DR: In this article, a typical microplastics (MP) was selected to study the effects of different concentrations of MP on anaerobic fermentation under the optimal volatile fatty acids (VFAs) production.
12 citations
TL;DR: In this paper , a new waste functionalization and utilization method, which use digestate to prepare hydrochar to improve methane production from food waste (FW) and sewage sludge (SS), was reported.
7 citations
References
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Book•
01 Jan 1992
TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Abstract: Set your standards with these standard methods. This is it: the most widely read publication in the water industry, your all-inclusive reference tool. This comprehensive reference covers all aspects of USEPA-approved water analysis methods. More than 400 methods - all detailed step-by-step; 8 vibrant, full-color pages of aquatic algae illustrations; Never-before-seen figures that will help users with toxicity testing and the identification of apparatus used in the methods; Over 300 superbly illustrated figures; A new analytical tool for a number of inorganic nonmetals; Improved coverage of data evaluation, sample preservation, and reagant water; And much more!
78,324 citations
TL;DR: Several sigmoidal functions (logistic, Gompertz, Richards, Schnute, and Stannard) were compared to describe a bacterial growth curve by using the model of Schnutes, which is a comprehensive model, encompassing all other models.
Abstract: Several sigmoidal functions (logistic, Gompertz, Richards, Schnute, and Stannard) were compared to describe a bacterial growth curve. They were compared statistically by using the model of Schnute, which is a comprehensive model, encompassing all other models. The t test and the F test were used. With the t test, confidence intervals for parameters can be calculated and can be used to distinguish between models. In the F test, the lack of fit of the models is compared with the measuring error. Moreover, the models were compared with respect to their ease of use. All sigmoidal functions were modified so that they contained biologically relevant parameters. The models of Richards, Schnute, and Stannard appeared to be basically the same equation. In the cases tested, the modified Gompertz equation was statistically sufficient to describe the growth data of Lactobacillus plantarum and was easy to use.
3,622 citations
TL;DR: In this article, the authors extensively review the principles of anaerobic digestion, the process parameters and their interaction, the design methods, the biogas utilisation, the possible problems and potential pro-active cures, and the recent developments to reduce the impact of the problems.
2,616 citations
Journal Article•
TL;DR: The importance of NITRIFICATION has been recognized for more than a hundred years and engineers and scientists continue to investigate the process to obtain a better understanding of the fundamentals and to use the process for the benefit of man.
Abstract: THE IMPORTANCE OF NITRIFICATION has been recognized for more than a cen tury. Engineers and scientists continue to investigate the process to obtain a better understanding of the fundamentals and to use the process for the benefit of man. Controlled nitrification may occur during waste treatment, and engineers have begun to incorporate the process as part of nitri fication-denitrification systems for nitrogen control preceding discharge of the treated wastes.
1,915 citations
Journal Article•
TL;DR: Control nitrification may occur during waste treatment, and engineers have begun to incorporate the process as part of nitri fication-denitrification systems for nitrogen control preceding discharge of the treated wastes.
Abstract: THE IMPORTANCE OF NITRIFICATION has been recognized for more than a cen tury. Engineers and scientists continue to investigate the process to obtain a better understanding of the fundamentals and to use the process for the benefit of man. Controlled nitrification may occur during waste treatment, and engineers have begun to incorporate the process as part of nitri fication-denitrification systems for nitrogen control preceding discharge of the treated wastes.
1,891 citations