Effects of base-pretreatment on continuous enriched culture for hydrogen production from food waste

Sang Hyoun Kim; Hang Sik Shin

doi:10.1016/j.ijhydene.2008.05.010

Effects of base-pretreatment on continuous enriched culture for hydrogen production from food waste

Sang Hyoun Kim, Hang Sik Shin

Department of Civil and Environmental Engineering

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

119 Citations (Scopus)

Abstract

This study aimed to achieve a reliable start-up method for continuous enriched culture for hydrogen production from food waste. When ground and diluted food waste (volatile solids (VS) 4.4 ± 0.2% containing 27 g carbohydrate-chemical oxygen demand/L) was fed, H₂ production decreased below 7.1 mL H₂/g VS (0.10 mol H₂/mol hexose_added) within 20 days, because the substrate was consumed via non-H₂-producing acidogenesis. To suppress the unintended microbial reactions, three methods were examined: lowering H₂ content by continuous CO₂ sparging, acid-pretreatment of food waste at pH 2.0 for 1 day, and base-pretreatment of food waste at pH 12.5 for 1 day. The base-pretreatment reduced indigenous anaerobic bacteria in food waste by 4.9 log and enabled a stable long-term operation over 90 days with the H₂ yields of 62.6 mL H₂/g VS (0.87 mol H₂/mol hexose_added). All bacterial species were affiliated with H₂-producing Clostridium spp. at the cases. Base dosage was increased by 11% compared to the un-pretreated condition.

Original language	English
Pages (from-to)	5266-5274
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2008.05.010
Publication status	Published - 2008 Oct

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Government of the Republic of Korea (MOST) (No. M1-0203-00-0063).

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

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10.1016/j.ijhydene.2008.05.010

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title = "Effects of base-pretreatment on continuous enriched culture for hydrogen production from food waste",

abstract = "This study aimed to achieve a reliable start-up method for continuous enriched culture for hydrogen production from food waste. When ground and diluted food waste (volatile solids (VS) 4.4 ± 0.2% containing 27 g carbohydrate-chemical oxygen demand/L) was fed, H2 production decreased below 7.1 mL H2/g VS (0.10 mol H2/mol hexoseadded) within 20 days, because the substrate was consumed via non-H2-producing acidogenesis. To suppress the unintended microbial reactions, three methods were examined: lowering H2 content by continuous CO2 sparging, acid-pretreatment of food waste at pH 2.0 for 1 day, and base-pretreatment of food waste at pH 12.5 for 1 day. The base-pretreatment reduced indigenous anaerobic bacteria in food waste by 4.9 log and enabled a stable long-term operation over 90 days with the H2 yields of 62.6 mL H2/g VS (0.87 mol H2/mol hexoseadded). All bacterial species were affiliated with H2-producing Clostridium spp. at the cases. Base dosage was increased by 11% compared to the un-pretreated condition.",

author = "Kim, {Sang Hyoun} and Shin, {Hang Sik}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Government of the Republic of Korea (MOST) (No. M1-0203-00-0063).",

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AU - Shin, Hang Sik

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PY - 2008/10

Y1 - 2008/10

N2 - This study aimed to achieve a reliable start-up method for continuous enriched culture for hydrogen production from food waste. When ground and diluted food waste (volatile solids (VS) 4.4 ± 0.2% containing 27 g carbohydrate-chemical oxygen demand/L) was fed, H2 production decreased below 7.1 mL H2/g VS (0.10 mol H2/mol hexoseadded) within 20 days, because the substrate was consumed via non-H2-producing acidogenesis. To suppress the unintended microbial reactions, three methods were examined: lowering H2 content by continuous CO2 sparging, acid-pretreatment of food waste at pH 2.0 for 1 day, and base-pretreatment of food waste at pH 12.5 for 1 day. The base-pretreatment reduced indigenous anaerobic bacteria in food waste by 4.9 log and enabled a stable long-term operation over 90 days with the H2 yields of 62.6 mL H2/g VS (0.87 mol H2/mol hexoseadded). All bacterial species were affiliated with H2-producing Clostridium spp. at the cases. Base dosage was increased by 11% compared to the un-pretreated condition.

AB - This study aimed to achieve a reliable start-up method for continuous enriched culture for hydrogen production from food waste. When ground and diluted food waste (volatile solids (VS) 4.4 ± 0.2% containing 27 g carbohydrate-chemical oxygen demand/L) was fed, H2 production decreased below 7.1 mL H2/g VS (0.10 mol H2/mol hexoseadded) within 20 days, because the substrate was consumed via non-H2-producing acidogenesis. To suppress the unintended microbial reactions, three methods were examined: lowering H2 content by continuous CO2 sparging, acid-pretreatment of food waste at pH 2.0 for 1 day, and base-pretreatment of food waste at pH 12.5 for 1 day. The base-pretreatment reduced indigenous anaerobic bacteria in food waste by 4.9 log and enabled a stable long-term operation over 90 days with the H2 yields of 62.6 mL H2/g VS (0.87 mol H2/mol hexoseadded). All bacterial species were affiliated with H2-producing Clostridium spp. at the cases. Base dosage was increased by 11% compared to the un-pretreated condition.

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Effects of base-pretreatment on continuous enriched culture for hydrogen production from food waste

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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