The influence of biomass agitation on biogas and methane production using the high-solids thermophilic anaerobic digestion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F17%3A10235896" target="_blank" >RIV/61989100:27710/17:10235896 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.degruyter.com/view/j/gps.2017.6.issue-3/gps-2016-0181/gps-2016-0181.xml" target="_blank" >https://www.degruyter.com/view/j/gps.2017.6.issue-3/gps-2016-0181/gps-2016-0181.xml</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/gps-2016-0181" target="_blank" >10.1515/gps-2016-0181</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of biomass agitation on biogas and methane production using the high-solids thermophilic anaerobic digestion

Popis výsledku v původním jazyce

In this study, we tested the high-solids thermophilic anaerobic digestion of separated cattle slurry solids inoculated by liquid digestate collected from the 1st stage of the wet process operated in an agricultural mesophilic biogas plant. The process without batch agitation (stirring) was carried out in a barrel bioreactor located in the incubator, whereas the process with batch agitation was carried out in a rotating drum bioreactor (rotation speed: 0.1 min−1). In both cases, the biomass batch was non-liquid and the content of total solids was 18.8 wt%. The processes were conducted discontinuously without any addition for 21 days. The total solids content of both batches decreased to about 15 wt%, with only slight liquefaction. The bulk density increased from 500 to 750 kg m−3. The highest biogas production was achieved consistently on the 7th day. During the 21-day period, the unagitated batch produced 0.120 mN3 of biogas, and the agitated batch produced 32.5% extra. The average CH4 content in biogas from the unstirred batch amounted to 47.7 vol.%, and biogas from the stirred batch reached 46.2 vol.%. The cumulative methane production rates from the unagitated and agitated batches were 0.095 and 0.121 mN3 kgVS−1, respectively. Thus, the agitation resulted in 28.5% higher methane yield.

Název v anglickém jazyce

The influence of biomass agitation on biogas and methane production using the high-solids thermophilic anaerobic digestion

Popis výsledku anglicky

In this study, we tested the high-solids thermophilic anaerobic digestion of separated cattle slurry solids inoculated by liquid digestate collected from the 1st stage of the wet process operated in an agricultural mesophilic biogas plant. The process without batch agitation (stirring) was carried out in a barrel bioreactor located in the incubator, whereas the process with batch agitation was carried out in a rotating drum bioreactor (rotation speed: 0.1 min−1). In both cases, the biomass batch was non-liquid and the content of total solids was 18.8 wt%. The processes were conducted discontinuously without any addition for 21 days. The total solids content of both batches decreased to about 15 wt%, with only slight liquefaction. The bulk density increased from 500 to 750 kg m−3. The highest biogas production was achieved consistently on the 7th day. During the 21-day period, the unagitated batch produced 0.120 mN3 of biogas, and the agitated batch produced 32.5% extra. The average CH4 content in biogas from the unstirred batch amounted to 47.7 vol.%, and biogas from the stirred batch reached 46.2 vol.%. The cumulative methane production rates from the unagitated and agitated batches were 0.095 and 0.121 mN3 kgVS−1, respectively. Thus, the agitation resulted in 28.5% higher methane yield.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Green processing and synthesis

ISSN

2191-9542

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

273-279

Kód UT WoS článku

000403509200004

EID výsledku v databázi Scopus

2-s2.0-85020391304