Recent Trends in Anaerobic Codigestion: A Review

Recent Trends in Anaerobic Codigestion: A Review


Subject and more

  • LCC Subject Category: Environmental Sciences
  • Publisher's keywords: Anaerobic digestion; Co-digestion; Biodegradable; Synergisms; Co-substrate
  • Language of fulltext: english
  • Full-text formats available: PDF


    K. M. Kangle., Kore S. V., Kore V. S., Kulkarni G. S.



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Anaerobic digestion is the most promising alternative to disposal this kind of waste, due to high energy recovery. The main objective of anaerobic digestion is the degradation and destruction of organic substances, with consequent reduction of the odorous emissions and pathogens. This conversion is catalyzed by a large of bacteria that operate in synergy, catalyzing different chemical reactions, hence the metabolic pathways involved in the anaerobic degradation are quite complex. Anaerobic digestion process follows four major steps: hydrolysis, acidogenesis, acetogenesis and methanogenesis. Hydrolysis is the rate-limiting step of the overall process degradation. In anaerobic digestion, co-digestion is the term used to describe the combined treatment of several wastes with complementary characteristics, being one of the main advantages of the anaerobic technology. Anaerobic digestion (AD) is a process by which microorganisms break down biodegradable material in the absence of oxygen. A great option for improving yields of anaerobic digestion of solid wastes is the codigestion of multiple substrates. If co-substrates are used in anaerobic digestion system it improves the biogas yields due to positives synergisms established in the digestion medium and the supply of missing nutrients. Recent research on this topic is reviewed in the current paper. Special attention is paid to anaerobic co-digestion of animal waste, crop and crop residues, industrial sludge, municipal solid waste (MSW), as well as municipal sewage sludge.

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