農業産業廃水の二段階嫌気性消化処理に関する文献レビュー
Anaerobic digestion (AD) is a well-established approach for stabilizing organic residues, yet substrates rich in soluble sugars or lipids pose operational difficulties. Multi-stage AD addresses these limitations by separately optimizing conditions for distinct microbial communities, thereby improving solid removal, methane yields, and energy recovery through co-production of molecular hydrogen. This review examines the applicability of two-stage AD to agroindustrial effluents—including manipueira, vinasse, and dairy wastewater—which exhibit favorable fermentation characteristics. In the acidogenic phase, readily fermentable sugars drive substantial hydrogen generation as a co-product of volatile acid formation, while the methanogenic phase captures methane. Key challenges identified include maintaining stable hydrogen composition and yield in the acid phase and managing complex residue streams. The authors recommend future research on novel microbial consortia and process parameter optimization to enable scale-up of two-stage AD systems.
In the acidogenic phase, readily fermentable sugars are converted to volatile acids with molecular hydrogen as a co-product; the subsequent methanogenic phase then captures methane, enabling dual energy recovery in a two-stage process.
The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/33360925