Effect of pH in fermentation of vegetable kitchen wastes on hydrogen production under a thermophilic condition

Evaluation of hydrogen and methane production from municipal solid wastes with different compositions of fat, protein, cellulosic materials and the other carbohydrates

“…Although VKW certainly is affiliated with the carbohydrate rich group, the hydrogen yield from VKW is not very high compared to other carbohydrates rich feedstocks. Some researchers have dealt with biohydrogen production from vegetable kitchen waste [23,24], and the hydrogen yield ranging from 19 ml to 86 ml, which was comparable to our results, was reported. The vegetable kitchen wastes used in this study and in the previous studies similarly contain a negligible amount of cellulose and hemicellulose.…”

Dark fermentation of complex waste biomass for biohydrogen production by pretreated thermophilic anaerobic digestate

“…Guo et al (2013) have demonstrated that the carbohydrate content of substrates influences directly the biohydrogen yields. Wastes like food waste, vegetables or kitchen wastes have a higher fraction of carbohydrates (13,000 ± 1500 mg hexose/L) (Lee et al, 2008), and thus give a higher H 2 yield. Slaughterhouse wastes, like dried blood, have more protein and hence a higher nitrogen content (48% of TS) (Salminen and Rintala, 2002).…”

State of the art and future concept of food waste fermentation to bioenergy

“…Single-phase hydrogen/methane fermentation Food waste, fruit-vegetable waste, dewatered sewage sludge n.a n.a n.a 2.33 m 3 m À 3 d À 1 0.39 m 3 kg À 1 VS CSTR [30] Food waste n.a n.a n.a 72 mL g À 1 VSS inoculum d 940 mL g À 1 VSS sub Batch reactor [88] Vegetable waste n.a n.a n.a Canteen based composite food waste 69.95 mmol Anaerobic SBR n.a n.a n.a [31] Vegetable waste 2.56 mL-H 2 h À 1 85.65 mL-H 2 g À 1 VS Batch reactor n.a n.a n.a [59] Municipal food waste, kitchen wastewater 6.0 7 0.5 L-H 2 d À 1 245 mL g-COD À 1 Anaerobic baffled reactor n.a n.a n.a [34] Municipal food waste n.a 370 mL-H 2 g À 1 VS Anaerobic baffled reactor n.a n.a n.a [33] Vegetable kitchen waste 1.0 L-H 2 L À 1 d À 1 1.7 mmol g-COD À 1 I-CSTR n.a n.a n.a [25] Kitchen wasteþ white rice 1.6 L-H 2 L À 1 d À 1 1.27 7 0.51 mmol g-COD À 1 I-CSTR n.a n.a n.a [26] Kitchen waste 60 l-H 2 L À 1 d À 1 1.2 mmol g-COD À 1 I-CSTR n.a n.a n.a [28] Kitchen waste -72 mL g À 1 VS Inclined plug flow reactor n.a n.a n.a [19] Starch-rich kitchen waste 2.2 L-H 2 L À 1 d À 1 2.1 mmol g-COD À 1 I-CSTR n.a n.a n.a [27] Vegetable kitchen waste 0.48 mmol-H 2 g À 1 VSS h À 1 0.57 mmol g-COD À 1 Batch reactor n.a n.a n.a [38] Two-phase hydrogen and methane fermentation Food waste 10.4 L-biogas L À 1 d À 1 (52-56% H 2 ) 205 mL g À 1 VS added CSTR 4.7 L-biogas L À 1 d À 1 (70-80% CH 4 ) 464 mL g À 1 VS Fluidized reactor [23] Food waste 11.1 L L À 1 -fed d À 1 2.5 mol mol À 1 hexose CSTR 47.4 L L À 1 -fed d À 1 287 mL g-COD À 1 Biogas sparging reactor [21] Potato waste 2.1 L L À 1 d À 1 85 mL g tank reactor (I-CSTR), operated in fill-and-draw mode has been widely documented. A hydrogen production rate of 1.0 L-H 2 L À 1 d À 1 and a yield of 1.7 mmol-H 2 g-COD À 1 was achieved upon digesting vegetable kitchen waste in I-CSTR [25].…”

“…More importantly, thermophilic and hyperthermophilic anaerobic digestion processes to produce bioenergy from FW are able to treat food industry organic waste and wastewater with high temperature more than 65°C without cooling them prior to fermentation. Several studies have been carried out on thermophilic and hyperthermophilic systems fed with FW as the source for hydrogen and methane production [21,[25][26][27][35][36][37][38][39][40]. A two reactor system comprising of one hyperthermophilic reactor for hydrogen generation and another mesophilic, thermophilic or hyperthermophilic reactor for methane generation, operated in series is often helpful.…”