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Enhancement of performance and stability of anaerobic co-digestion of waste activated sludge and kitchen waste by using bentonite
- Source :
- PLoS ONE, Vol 14, Iss 7, p e0218856 (2019), PLoS ONE
- Publication Year :
- 2019
- Publisher :
- Public Library of Science (PLoS), 2019.
-
Abstract
- 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.
- Subjects :
- Atmospheric Science
Methanogens
Biogas
02 engineering and technology
010501 environmental sciences
01 natural sciences
Physical Chemistry
Sludge
Waste Disposal, Fluid
Methane
chemistry.chemical_compound
Bioreactors
0202 electrical engineering, electronic engineering, information engineering
Bioenergy
Anaerobiosis
Materials
Multidisciplinary
Sewage
Chemistry
Organic Compounds
Hydrolysis
Microbiota
Chemical Reactions
Hydrogen-Ion Concentration
Pulp and paper industry
Biodegradation, Environmental
Bentonite
Physical Sciences
Engineering and Technology
Sorption
Medicine
Anaerobic bacteria
Research Article
020209 energy
Science
Materials Science
Carbohydrates
Fuels
Anaerobic Bacteria
Greenhouse Gases
Bioreactor
Environmental Chemistry
Humans
0105 earth and related environmental sciences
Bacteria
Ecology and Environmental Sciences
Organic Chemistry
Chemical Compounds
Organisms
Biology and Life Sciences
Biodegradation
Archaea
Energy and Power
Activated sludge
Atmospheric Chemistry
Biofuels
Earth Sciences
Adsorption
Waste disposal
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 14
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....14287b1d89f601c0cf16587a3246cec8