The performance of dry anaerobic digestion (AD) of food waste was investigated under mesophilic conditions and the methanogenic community was investigated using 454 pyrosequencing. Stable dry AD was achieved by hydraulic retention time (HRT) control without the addition of alkali agents. The average CH4 production rate, CH4 content, and volatile solid reduction rate were 2.51±0.17m(3)/m(3)/d, 66±2.1%, and 65.8±1.22%, respectively, at an HRT of 40d. The methanogenic community of the seed sludge experienced a significant reduction in genus diversity from 18 to 4 and a dominant methanogenic shift from hydrogenotrophic to acetoclastic groups after the acclimation under dry condition. Almost all sequences of the dry anaerobic digester were closely related with those of Methanosarcina thermophila with similarity of 96.4-99.1%. The experimental results would serve as useful information to understand the dry AD system.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2012.12.100 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Efficiency and process development for microbial biomass production using oxic bioelectrosynthesis.
Trends Biotechnol
December 2024
Institute of Technical Microbiology, Hamburg University of Technology (TUHH), Kasernenstraße 12 (F), 21073 Hamburg, Germany. Electronic address:
Autotrophic microbial electrosynthesis (MES) processes are mainly based on organisms that rely on carbon dioxide (CO) as an electron acceptor and typically have low biomass yields. However, there are few data on the process and efficiencies of oxic MES (OMES). In this study, we used the knallgas bacterium Kyrpidia spormannii to investigate biomass formation and energy efficiency of cathode-dependent growth.
View Article and Find Full Text PDFIsolation and characterization of novel bacterial strain from sewage sludge and exploring its potential for hydrogen production.
Arch Microbiol
December 2024
School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, 221005, India.
Hydrogen (H) energy has garnered significant attention due to its numerous advantages. Nonetheless, for future commercialization, it is imperative to screen and identify strains with enhanced H-producing capacities. In order to attain a high and consistent production performance, the conversion of biomass sources into H requires careful selection of the most appropriate H-producing bacteria.
View Article and Find Full Text PDFSimulation and prediction of sulfamethazine migration, transformation and risk diffusion during cross-media infiltration from surface water to groundwater driven by dynamic water level: Machine learning coupled HYDRUS-GMS model.
J Environ Manage
November 2024
College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China. Electronic address:
Seasonal water level fluctuations in rivers significantly influenced the cross-media migration, transformation, and risk diffusion of antibiotics from the vadose zone into groundwater. This study developed a coupled model integrating machine learning (ML) with HYDRUS-3D and GMS to accurately predict sulfamethazine migration under dynamic water levels. The predictive accuracy (E≥0.
View Article and Find Full Text PDFHigh cell density cultivation by anaerobic respiration.
Microb Cell Fact
November 2024
Faculty of Biotechnology, Chemistry and Food Science, Norwegian University for Life Sciences, Ås, Norway.
Article Synopsis
- Oxygen supply is a challenge in aerobic high cell density culturing of bacteria, but denitrification with nitrogen oxides offers a promising alternative due to higher solubility of NO in water and harmless end products.
- The novel pH-stat approach using HNO helps regulate pH and sustain NO concentration during the process, allowing for successful high-density growth of the model strain Paracoccus denitrificans using glucose and NO.
- Despite achieving a dry weight of 20 g/L, slower growth rates were observed, attributed to CO/HCO buildup that suppressed pH and affected NO feeding, while unbalanced electron flow could lead to toxic intermediate concentrations.
Background of persistent organic pollutants in estuarine sediments from the Marajó Island, an Amazonian environmental protection area for sustainable use.
Environ Sci Pollut Res Int
December 2024
Laboratório de Química Orgânica Marinha, Departamento de Oceanografia Química e Geológica, Instituto Oceanográfico, Universidade de São Paulo, Praça do Oceanográfico, 191, Cidade Universitária, São Paulo, SP, CEP, 05508-120, Brasil.
Marajó Island, an environmental protection area for sustainable use in the Brazilian Amazon, was the first region in Brazil to apply the pesticide DDT, a persistent organic pollutant (POP), to control malaria outbreaks. This study investigated background levels of various POPs, including o,p'- and p,p'-DDT and their primary metabolites (o,p'- and p,p'-DDE, o,p'- and p,p'-DDD), as well as hexachlorocyclohexane (α-, β-, γ-, δ-HCH), using estuarine surface sediments and sediment cores from areas influenced by urbanization and agriculture. All samples were collected during the dry season (September 2014).
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!