The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR

O. Pakarinen; P. Kaparaju; J. Rintala

doi:10.1016/j.biortech.2011.07.020

The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR

O. Pakarinen, P. Kaparaju, J. Rintala

Research output: Contribution to journal › Article › Scientific › peer-review

46 Citations (Scopus)

Abstract

The possibility of shifting a methanogenic process for hydrogen production by changing the process parameters viz., organic loading rate (OLR) and hydraulic retention time (HRT) was evaluated. At first, two parallel semi-continuously fed continuously stirred tank reactors (CSTR) were operated as methanogenic reactors (M1 and M2) for 78days. Results showed that a methane yield of 198-218L/kg volatile solids fed (VS _fed) was obtained when fed with grass silage at an OLR of 2kgVS/m ³/d and HRT of 30days. After 78days of operation, hydrogen production was induced in M2 by increasing the OLR from 2 to 10kgVS/m ³/d and shortening the HRT from 30 to 6days. The highest H ₂ yield of 42L/kgVS _fed was obtained with a maximum H ₂ content of 24%. The present results thus demonstrate that methanogenic process can be shifted towards hydrogen production by increasing the OLR and decreasing HRT.

Original language	English
Pages (from-to)	8952-8957
Number of pages	6
Journal	Bioresource Technology
Volume	102
Issue number	19
DOIs	https://doi.org/10.1016/j.biortech.2011.07.020
Publication status	Published - Oct 2011
Publication type	A1 Journal article-refereed

Keywords

Grass silage
Hydrogen
Methane
Shifting
VFA

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2011.07.020

Cite this

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title = "The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR",

abstract = "The possibility of shifting a methanogenic process for hydrogen production by changing the process parameters viz., organic loading rate (OLR) and hydraulic retention time (HRT) was evaluated. At first, two parallel semi-continuously fed continuously stirred tank reactors (CSTR) were operated as methanogenic reactors (M1 and M2) for 78days. Results showed that a methane yield of 198-218L/kg volatile solids fed (VS fed) was obtained when fed with grass silage at an OLR of 2kgVS/m 3/d and HRT of 30days. After 78days of operation, hydrogen production was induced in M2 by increasing the OLR from 2 to 10kgVS/m 3/d and shortening the HRT from 30 to 6days. The highest H 2 yield of 42L/kgVS fed was obtained with a maximum H 2 content of 24%. The present results thus demonstrate that methanogenic process can be shifted towards hydrogen production by increasing the OLR and decreasing HRT.",

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author = "O. Pakarinen and P. Kaparaju and J. Rintala",

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T1 - The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR

AU - Pakarinen, O.

AU - Kaparaju, P.

AU - Rintala, J.

PY - 2011/10

Y1 - 2011/10

N2 - The possibility of shifting a methanogenic process for hydrogen production by changing the process parameters viz., organic loading rate (OLR) and hydraulic retention time (HRT) was evaluated. At first, two parallel semi-continuously fed continuously stirred tank reactors (CSTR) were operated as methanogenic reactors (M1 and M2) for 78days. Results showed that a methane yield of 198-218L/kg volatile solids fed (VS fed) was obtained when fed with grass silage at an OLR of 2kgVS/m 3/d and HRT of 30days. After 78days of operation, hydrogen production was induced in M2 by increasing the OLR from 2 to 10kgVS/m 3/d and shortening the HRT from 30 to 6days. The highest H 2 yield of 42L/kgVS fed was obtained with a maximum H 2 content of 24%. The present results thus demonstrate that methanogenic process can be shifted towards hydrogen production by increasing the OLR and decreasing HRT.

AB - The possibility of shifting a methanogenic process for hydrogen production by changing the process parameters viz., organic loading rate (OLR) and hydraulic retention time (HRT) was evaluated. At first, two parallel semi-continuously fed continuously stirred tank reactors (CSTR) were operated as methanogenic reactors (M1 and M2) for 78days. Results showed that a methane yield of 198-218L/kg volatile solids fed (VS fed) was obtained when fed with grass silage at an OLR of 2kgVS/m 3/d and HRT of 30days. After 78days of operation, hydrogen production was induced in M2 by increasing the OLR from 2 to 10kgVS/m 3/d and shortening the HRT from 30 to 6days. The highest H 2 yield of 42L/kgVS fed was obtained with a maximum H 2 content of 24%. The present results thus demonstrate that methanogenic process can be shifted towards hydrogen production by increasing the OLR and decreasing HRT.

KW - Grass silage

KW - Hydrogen

KW - Methane

KW - Shifting

KW - VFA

U2 - 10.1016/j.biortech.2011.07.020

DO - 10.1016/j.biortech.2011.07.020

M3 - Article

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AN - SCOPUS:80052377734

SN - 0960-8524

VL - 102

SP - 8952

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JO - Bioresource Technology

JF - Bioresource Technology

IS - 19

ER -

The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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