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

^*Corresponding author for this work

Not published at VTT

University of Jyväskylä

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

47 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
MoE publication type	A1 Journal article-refereed

Funding

This research was financially supported by Finnish Graduate School for Energy Science and Technology (EST) and Nordic Energy Research (BioHydrogen). Farmer Erkki Kalmari is acknowledged for providing the substrate and inoculum. Special thanks to Mrs. Mervi Koistinen, Mrs. Suvi Bayr and Ms. Hanna Koponen for their help with laboratory work.

Keywords

Grass silage
Hydrogen
Methane
Shifting
VFA

Access to Document

10.1016/j.biortech.2011.07.020

Cite this

@article{fb5fe5ee5af945298f6fd811494582b3,

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.",

keywords = "Grass silage, Hydrogen, Methane, Shifting, VFA",

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

year = "2011",

month = oct,

doi = "10.1016/j.biortech.2011.07.020",

language = "English",

volume = "102",

pages = "8952--8957",

journal = "Bioresource Technology",

issn = "0960-8524",

publisher = "Elsevier",

number = "19",

}

TY - JOUR

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

UR - https://www.scopus.com/pages/publications/80052377734

U2 - 10.1016/j.biortech.2011.07.020

DO - 10.1016/j.biortech.2011.07.020

M3 - Article

C2 - 21803578

AN - SCOPUS:80052377734

SN - 0960-8524

VL - 102

SP - 8952

EP - 8957

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

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this