Heat Pre-Treatment of Beverages Wastewater on Hydrogen Production

International Technical Postgraduate Conference

Uyub, S.Z.^1 ; Mohd, N.S.^1 ; Ibrahim, S.^1

Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia^1

关键词: Bio-hydrogen production;    Central composite designs;    COD removal efficiency;    Heat treatment conditions;    Hydrogen producing bacteria;    Pretreatment conditions;    Response surface methodology;    Wastewater treatment plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/210/1/012023/pdf
DOI  :  10.1088/1757-899X/210/1/012023

来源: IOP

【 摘 要 】

At present, a large variety of alternative fuels have been investigated and hydrogen gas is considered as the possible solution for the future due to its unique characteristics. Through dark fermentation process, several factors were found to have significant impact on the hydrogen production either through process enhancement or inhibition and degradation rates or influencing parameters. This work was initiated to investigate the optimum conditions for heat pre-treatment and initial pH for the dark fermentative process under mesophilic condition using a central composite design and response surface methodology (RSM). Different heat treatment conditions and pH were performed on the seed sludge collected from the anaerobic digester of beverage wastewater treatment plant. Heat treatment of inoculum was optimized at different exposure times (30, 90, 120 min), temperatures (80, 90 and 100°C) and pH (4.5, 5.5, 6.5) in order to maximize the biohydrogen production and methanogens activity inhibition. It was found that the optimum heat pre-treatment condition and pH occurred at 100°C for 50 min and the pH of 6.00. At this optimum condition the hydrogen yield was 63.0476 ml H2/mol glucose (H2Yield) and the COD removal efficiency was 90.87%. In conclusion, it can be hypothesized that different heat treatment conditions led to differences in the initial microbial communities (hydrogen producing bacteria) which resulted in the different hydrogen yields.