Two-stage psychrophilic anaerobic digestion of food waste: Comparison to conventional single-stage mesophilic process

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F20%3A10245505" target="_blank" >RIV/61989100:27710/20:10245505 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0956053X2030550X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0956053X2030550X?via%3Dihub</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Two-stage psychrophilic anaerobic digestion of food waste: Comparison to conventional single-stage mesophilic process

Original language description

Food waste collected exclusively from University restaurant was tested under anaerobic digestion (AD) conditions to determine its biomethane generation potential. The digestion characteristics of food waste were evaluated in BMP tests and in a conventional single-stage mesophilic CST Reactor. The suitability of psychrophilic two-stage AD to convert food waste was investigated by using a novel two-stage psychrophilic semi-continuous reactor, consisted of a vertically-oriented cylindrical reactor and a coaxially incorporated vertical tube able to spatially separate acidification from methanogenesis. Food waste presented significant methane generation performance under mesophilic conditions. Relatively high amounts of H2S released during process evolution did not have a significant effect on biogas production. For psychrophilic two-stage AD, H2S generated during start-up provoked reactor&apos;s instability only for a few days. The system was stable and operated at steady-state conditions over the course of the main AD. Higher amount of biogas was produced by the two-stage psychrophilic reactor (0.800 m3 kgVSMINUS SIGN 1) than the mesophilic single-stage system (0.751 m3 kgVSMINUS SIGN 1). However, the average methane quantities generated by the two systems were remarkably similar (0.444 and 0.440 m3 kgVSMINUS SIGN 1). Psychrophilic process was more efficient in utilizing higher proportions of volatile organics contained in substrate for methane generation than mesophilic operation. The low-temperature two-stage reactor was more energy-efficient than the mesophilic CSTR for digestion of food waste. Two-stage anaerobic digestion system operating under psychrophilic conditions might be an economically feasible option for efficiently digesting food waste.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20700 - Environmental engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Waste Management

ISSN

0956-053X

e-ISSN

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Volume of the periodical

119

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

172-182

UT code for WoS article

000599766200017

EID of the result in the Scopus database

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