Hydrogen and methane production by co-digestion of waste activated sludge and food waste in the two-stage fermentation process: substrate conversion and energy yield.

Batch experiments were conducted to produce hydrogen and methane from waste activated sludge and food waste by two-stage mesophilic fermentation. Hydrogen and methane production, energy yield, soluble organic matters, volatile solid removal efficiency and carbon footprint were investigated during two-stage digestion at various food waste proportions. The highest energy yield reached 14.0 kJ/g-VS at the food waste proportion of 85%, with hydrogen and methane yields of 106.4 ml-H2/g-VS and 353.5 ml-CH4/g-VS respectively. The dominant VFA composition was butyrate for co-digestion and sole food waste fermentation, whereas acetate was dominate in VFA for sole waste activated sludge fermentation. The VS removal efficiencies of co-digestion were 10-77% higher than that of waste activated sludge fermentation. Only 0.1-3.2% of the COD in feedstock was converted into hydrogen, and 14.1-40.9% to methane, with the highest value of 40.9% in methane achieved at food waste proportion of 85%.

[1]  Alissara Reungsang,et al.  Co-digestion of food waste and sludge for hydrogen production by anaerobic mixed cultures: Statistic , 2011 .

[2]  Hang-Sik Shin,et al.  FEASIBILITY OF BIOHYDROGEN PRODUCTION BY ANAEROBIC CO-DIGESTION OF FOOD WASTE AND SEWAGE SLUDGE , 2004 .

[3]  Glen T. Daigger,et al.  Biological wastewater treatment. , 2011 .

[4]  Qi Yang,et al.  Impacts of sterilization, microwave and ultrasonication pretreatment on hydrogen producing using waste sludge. , 2008, Bioresource technology.

[5]  Qi Zhou,et al.  Biohydrogen and methane production by co-digestion of cassava stillage and excess sludge under thermophilic condition. , 2011, Bioresource technology.

[6]  Sami Luste,et al.  Anaerobic co-digestion of meat-processing by-products and sewage sludge - effect of hygienization and organic loading rate. , 2010, Bioresource technology.

[7]  K. Kida,et al.  Microbial community analysis of mesophilic anaerobic protein degradation process using bovine serum albumin (BSA)-fed continuous cultivation. , 2005, Journal of bioscience and bioengineering.

[8]  Yuansong Wei,et al.  Enhanced biohydrogen production from sewage sludge with alkaline pretreatment. , 2004, Environmental science & technology.

[9]  Hang-Sik Shin,et al.  Experience of a pilot-scale hydrogen-producing anaerobic sequencing batch reactor (ASBR) treating food waste , 2010 .

[10]  Kefa Cen,et al.  Cogeneration of hydrogen and methane from protein-mixed food waste by two-phase anaerobic process , 2010 .

[11]  Bruce E Logan,et al.  Inhibition of biohydrogen production by ammonia. , 2006, Water research.

[12]  Qi Zhou,et al.  Enhancement of bioenergy production from organic wastes by two-stage anaerobic hydrogen and methane production process. , 2011, Bioresource technology.

[13]  Hang-Sik Shin,et al.  Sewage sludge addition to food waste synergistically enhances hydrogen fermentation performance. , 2011, Bioresource technology.

[14]  Thomas D DiStefano,et al.  Effect of anaerobic reactor process configuration on useful energy production. , 2010, Water research.

[15]  J. Chung,et al.  Bioproduction of hydrogen from food waste by pilot-scale combined hydrogen/methane fermentation , 2010 .

[16]  J. Máca,et al.  Stability and inhibition of anaerobic processes caused by insufficiency or excess of ammonia nitrogen , 2011, Applied Microbiology and Biotechnology.

[17]  Kefa Cen,et al.  Cogeneration of hydrogen and methane from glucose to improve energy conversion efficiency , 2008 .

[18]  Peter Seto,et al.  Eliminating methanogenic activity in hydrogen reactor to improve biogas production in a two-stage anaerobic digestion process co-digesting municipal food waste and sewage sludge. , 2011, Bioresource technology.

[19]  J. Lay,et al.  Mathematical Model for Methane Production from Landfill Bioreactor , 1998 .

[20]  A. Montusiewicz,et al.  Co-digestion of intermediate landfill leachate and sewage sludge as a method of leachate utilization. , 2011, Bioresource technology.

[21]  Peter Seto,et al.  Biohydrogen production by anaerobic co-digestion of municipal food waste and sewage sludges , 2008 .

[22]  J. Tay,et al.  Production of hydrogen and methane from wastewater sludge using anaerobic fermentation. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[23]  Lahdheb Habiba,et al.  Improvement of activated sludge stabilisation and filterability during anaerobic digestion by fruit and vegetable waste addition. , 2009, Bioresource technology.

[24]  O. H. Lowry,et al.  Protein measurement with the Folin phenol reagent. , 1951, The Journal of biological chemistry.

[25]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[26]  Liang Meng,et al.  Effects of volatile fatty acid concentrations on methane yield and methanogenic bacteria , 2009 .

[27]  N. J. Horan,et al.  Energy optimisation from co-digested waste using a two-phase process to generate hydrogen and methane , 2011 .