Microbial community structures were assessed in a two-stage anaerobic digestion system treating food waste-recycling wastewater. The reactors were operated for 390 d at 10 different hydraulic retention times (HRTs) ranging from 25 to 4 d. Stable operation was achieved with the overall chemical oxygen demand (COD) removal efficiency of 73.0-85.9% at organic loading rate of up to 35.6 g COD/L·d. Performance of the acidogenic reactors, however, changed significantly during operation. This change coincided with transition of the bacterial community from one dominated by Aeriscardovia- and Lactobacillus amylovorus-related species to one dominated by Lactobacillus acetotolerans- and Lactobacillus kefiri-like organisms. In methanogenic reactors, the microbial community structures also changed at this stage along with the shift from Methanoculleus- to Methanosarcina-like organisms. This trend was confirmed by the non-metric multidimensional scaling joint plot of microbial shifts along with performance parameters. These results indicated that the overall process performance was relatively stable compared to the dynamic changes in the microbial structures and the acidogenic performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2010.07.019 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Antibiotic resistome during two-stage partial nitritation/anammox process for sludge anaerobic digestion reject water treatment.
J Hazard Mater
December 2024
College of Environmental Science and Engineering, Institute of Carbon Neutrality, State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
Anaerobic digestion (AD) reject water serves as a significant reservoir for antibiotic resistance genes (ARGs), underscoring the importance of understanding ARGs dynamics during treatment processes. Partial nitritation /anammox (PN/A) has become an increasingly adopted process, while comprehensive investigation on ARG behavior within this system, especially in full-scale, remains limited. This study explores the distribution of ARGs in a full-scale two-stage PN/A system, with an anaerobic/anoxic/oxic (AAO) system for comparison.
View Article and Find Full Text PDFAchieving mainstream nitrogen removal by partial nitrification and anammox in the carriers-coupled membrane aerated biofilm reactor.
Water Res
December 2024
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China; Research and Application Centre for Membrane Technology, School of Environment, Tsinghua University, Beijing, 100084, China. Electronic address:
The integration of partial nitrification-anammox (PN/A) into membrane-aerated biofilm reactor (MABR) is a promisingly energy-efficient and high-efficiency technology for nitrogen removal. The inhibition of nitrite oxidizing bacteria (NOB) remains as the most significant challenge for its development. In our investigation, we proposed a novel process to integrate carriers to MABR (CMABR), which combined the carriers enriched with anaerobic ammonium-oxidizing bacteria (AnAOB) and partial nitrifying MABR system.
View Article and Find Full Text PDFCarbon-negative bio-production of short-chain carboxylic acids (SCCAs) from syngas via the sequential two-stage bioprocess by Moorella thermoacetica and metabolically engineered Escherichia coli.
Bioresour Technol
January 2025
State Key Laboratory of Bioreactor Engineering, Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; MOE Key Laboratory of Bio-Intelligent Manufacturing, School of Bioengineering, Dalian University of Technology, Dalian, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, China. Electronic address:
Syngas can be efficiently converted to acetate by Moorella thermoacetica under anaerobic conditions, which is environmentally friendly. Coupled with acetate production from syngas, using acetate to synthesize value-added compounds such as short-chain carboxylic acids (SCCAs) becomes a negative-carbon process. Escherichia coli is engineered to utilize acetate as the sole carbon source to produce SCCAs.
View Article and Find Full Text PDFDual optimization in anaerobic digestion of rice straw: Effects HRT and OLR coupling on methane production in one-stage and two-stage systems.
J Environ Manage
November 2024
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China. Electronic address:
This experiment reports an energy-saving, cost-effective and environmental-friendly method to recover energy from high-cellulose waste: anaerobic digestion (AD) by extending hydraulic residence time (HRT) from 50d to 70d with ultra-high organic loading rate (OLR) of 2.28-2.80 g TS·L d.
View Article and Find Full Text PDFInsights of energy potential in thermophilic sugarcane vinasse and molasses treatment: does two-stage codigestion enhance operational performance?
Biodegradation
October 2024
Department of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luis, Km 235, São Carlos, SP, 13565-905, Brazil.
The study evaluated the performance of thermophilic co-digestion in both single-stage methanogenic reactors (TMR) and two-stage systems, consisting of a thermophilic acidogenic reactor and a thermophilic sequential methanogenic reactor (TSMR). A 1:1 mixture of sugarcane vinasse and molasses was codigested in anaerobic fluidized bed reactors, with varying organic matter concentrations based on chemical oxygen demand (COD) ranging from 5 to 22.5 g COD L.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!