Biohydrogen production from chemical wastewater treatment in biofilm configured reactor operated in periodic discontinuous batch mode by selectively enriched anaerobic mixed consortia

Integration of acidogenic and methanogenic processes for simultaneous production of biohydrogen and methane from wastewater treatment

“…In recent times a great deal of attention is focused on hydrogen (H 2 ) production by biological route as an alternative and viable method by research fraternity [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. H 2 has been recognized as a promising, green and ideal energy carrier of the future due to its high energy yield (122 kJ/g) and clean, efficient, renewable, sustainable and recyclable nature [16].…”

“…This process occurs at ambient temperatures and pressures, which is less energy intensive and more environmental friendly [23,24]. Exploitation of wastewater as substrate for H 2 production with simultaneous wastewater treatment is gaining importance and further leads to open a new avenue for the utilization of renewable and inexhaustible energy sources [1][2][3][4][6][7][8][9][10]13,[25][26][27][28][29][30][31][32][33][34][35][36]. Combined with the wastewater treatment, this process is capable of solving two problems: the reduction of pollution of waste and the generation of a clean alternative fuel [18,37].…”

“…Typical H 2 yield range from 1 to 2 mol of H 2 /mol of glucose, and results in 80-90% of the initial chemical oxygen demand (COD) remaining in the wastewater in the form of various volatile organic acids (VFAs) and solvents, such as acetic, propionic, butyric acids and ethanol [1]. Even under optimal conditions about 60-70% of the original organic matter remains in solution [12][13][14][15]. In spite of theoretical conversion efficiency of 33%, only 15% of the energy from the organic source is typically obtained in the form of H 2 [1,11,38,39].…”

An overview of renewable hydrogen production from thermochemical process of oil palm solid waste in Malaysia

“…Around 50% of all the produced H 2 is achieved from thermocatalytic of NG as a raw material followed by heavy oils, naphtha as well as coal, and only 4% is produced from electrolysis of water [15]. Biomass is an appropriate option to produce H 2 through thermochemical technologies.…”

Fermentative effluents from hydrogen producing bioreactor as substrate for poly(β-OH) butyrate production with simultaneous treatment: An integrated approach

“…Volatile fatty acids (VFA) are soluble acid metabolic intermediates formed along with H 2 production during acidogenic fermentation (Venkata Mohan et al, 2007, 2008a. VFA present in these effluents can be further transformed to polyhydroxyalkanoates (PHA) or can be used for biohydrogenation of fatty acids into alcohols.…”