Chapter 5 - Combined anaerobic fermentation biohydrogen and biomethane production for sewage sludge and food waste

Abstract

In this chapter the influencing factors such as pretreatment conditions, initial pH, and different additives for biohydrogen production from sewage sludge fermentation are given to explore the optimal biohydrogen production parameters and instruments, including experimental design pretreatment methods for sludge, biohydrogen production with different pretreatment methods, disintegration characteristics of sludge, biohydrogen-producing bacteria and hydrogen-consuming bacteria, effect of initial pH on hydrogen production, and effect of pretreatment and substrate addition on hydrogen production. The effect of inhibitors on the biohydrogen production process of sludge anaerobic fermentation is also introduced, including experimental design, variation of biohydrogen and biomethane, variation of substrate before and after fermentation, and mechanism of biohydrogen generation. Landfill leachate and fresh food waste are selected for enhancing biohydrogen production from sludge, and heat pretreatment of sludge, acid and alkali pretreatment of sludge, self-acidification of food waste on biohydrogen production, characteristics variation of food waste and sludge, combined anaerobic fermentation of hydrogen production from heat-treated sludge and fresh food waste, are discussed. The mechanism of combined anaerobic fermentation, including degradation of sugar and protein, variation of the main liquid-phase products during the fermentation process, impact test of a single factor, and research on response surface optimization are also elaborated on.