Additives as a Support Structure for Specific Biochemical Activity Boosts in Anaerobic Digestion: A Review

Frontiers in Energy Research

Monika Yadav¹  Kunwar Paritosh¹  Vivekanand Vivekanand¹  Dinabandhu Sahoo²  Nupur Kesharwani³  Nidhi Pareek⁴  Aakash Chawade⁵ 

[1] Centre for Energy and Environment, Malaviya National Institute of Technology, Jaipur, India;Department of Botany, University of Delhi, New Delhi, India;Department of Civil Engineering, National Institute of Technology, Raipur, India;Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer, India;Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden;

关键词: additives;    syntrophy;    methane;    biochemical activity;    anaerobic digestion;    inhibition;   

DOI  :  10.3389/fenrg.2020.00088

来源: DOAJ

【 摘 要 】

Anaerobic digestion is an attractive technology for resource management of organic waste and stubble. The state of biochemical reactions and activities in anaerobic digestion determines the process stability. Biochemical activities, such as syntrophic, metabolic, catalytic, and enzymatic activities, regulate the anaerobic efficiency for improved methane yield. Inhibitors, such as access to volatile fatty acids, ammonia, sulfur, and heavy metals, may slow down the anaerobic digestion and may cause reactor failure. However, additives for various biochemical activities may help to diminish the effect of inhibitors as well as improve process stability for enhanced methane yield. This manuscript presents an overview of various additives for enhancing the biochemical activities. The overview consists of the application of (a) conductive material for improving syntrophic activity, (b) trace metals for metabolic activities, (c) nanoparticles for improving catalytic activity, metabolism, and symbiosis during AD, (d) biological additives for enzymatic action, and (e) application of zeolite for introducing cation exchange properties in anaerobic digestion. Also, a comparison of various additives as per biochemical activity has also been performed for a deeper insight into the application of additives in anaerobic digestion.

【 授权许可】

Unknown