Bio-hydrogen production by dark anaerobic fermentation of organic wastewater

Abstract

Using organic wastewater to produce hydrogen by fermentation can generate clean energy while treating wastewater. At present, there are many inhibitory factors in the hydrogen production process, resulting in unsatisfactory hydrogen yield and hydrogen concentration during the fermentation process, and there are still great obstacles to the industrial promotion and commercial application of organic wastewater fermentation hydrogen production. This paper summarizes the hydrogen production of organic wastewater dark anaerobic fermentation technology. The current anaerobic fermentation hydrogen production systems and technologies are summarized and compared, and the factors and potential conditions that affect the performance of hydrogen production are discussed. The further requirements and research priorities for the market application of fermentation biohydrogen production technology in wastewater utilization are prospected.

Impact of Waste Cooking Oils Addition on Thermophilic Dry Co-Digestion of Wheat Straw and Horse Manure for Renewable Energy Production in Two Stages

“…One of the advantages of the realization of anaerobic digestion at higher temperatures (suitable for thermophilic microorganisms) is the smaller influence of this factor on the system. Other methods of preventing the increase in the partial pressure of hydrogen are acceleration of stirring or the addition of an inert gas to the system [ 33 ].…”

An Updated Review of Recent Applications and Perspectives of Hydrogen Production from Biomass by Fermentation: A Comprehensive Analysis

“…In summary, we see that different substrates, such as lignocellulosic biomass, glycerol, sludge, and wastewater, can be used in the production of fermentative hydrogen, and this reflects efforts towards more sustainable and economically attractive raw materials, taking advantage of industrial waste and by-products [189,[225][226][227]. Lignocellulosic biomass is valued for its abundance and sustainability, transforming waste into energy and minimizing dependence on fossil fuels [66,102,212].…”

“…Furthermore, several microbial species transform organic substrates in fermentative processes to produce hydrogen [65,76,187,230]. Such processes can occur in the absence or presence of light and are known as dark fermentation and photofermentation, respectively [44,225,231]. In dark fermentation, anaerobic microorganisms, such as species of the genus Clostridium (e.g., Clostridium butyricum, Clostridium cellolosi, and Clostridium acetobutylicum), play a fundamental role in converting sugars and other organic compounds into hydrogen, in addition to generating organic acids (e.g., lactic acid, acetic acid, and butyric acid) and alcohols [185,232].…”

Effects of food wastes based on different components on digestibility and energy recovery in hydrogen and methane co-production

“…It relies on the first stage of dark fermentation, where hydrogen and volatile organic acids (VFAs) are produced from organic substances by acidogenesis and homoacetogenesis through hydrolysis. It not only avoids the limitations of light conditions [ 9 ] but also provides abundant digestive material for the second stage (methanogenic stage), which better solves the inhibition effect of the reaction system and facilitates the recycling of nutrients and energy [ 10 ].…”