Abstract
Anaerobic digestion (AD) is an established method that has been extensively utilized for waste management, waste treatment, and biogas production. Anaerobic co-digestion (AcoD) is regarded as a practical approach to address substrate characteristics and system optimization issues. The distinction between AcoD and mono-digestion is that AcoD has a higher organic loading and significant substrate composition variation. There are many factors involved in AcoD which affect the biogas plant’s production ability and performance. Using response surface methodology (RSM) to forecast the optimal conditions for maximum biogas output, this article provides an overview of the different operational parameters in the AcoD process, modeling of the AcoD process, and overall process optimization. Standard software used for AcoD process simulation are Aspen Plus, SuperPro Designer, BioWin, CFD, and MATLAB. Review addresses design, development, and optimization frameworks for biogas production systems that take numerous aspects into account. The most significant AcoD optimization parameters include temperature, co-substrate concentration, inoculum ratio (percent), and C/N ratio.
Highlights
Sustainable and renewable energies are significantly connected, available in abundance and considered sustainable like solar, wind, biomass, and geothermal
The microorganisms might die because of a shortage of nutrients when the hydraulic retention time (HRT) is long short HRT is recommended for industrial application to decrease the digester volume, lower cost, and maximize the production of biogas and production of net electrical energy (Meegoda et al, 2018; Shaojie et al, 2020)
There are few simulations performed for the Anaerobic co-digestion (AcoD) process using municipal solid waste organic fractions and sewage sludge via the anaerobic digestion model no 1 (ADM1) modeling approach (Derbal et al, 2009; Esposito et al, 2011)
Summary
Sustainable and renewable energies are significantly connected, available in abundance and considered sustainable like solar, wind, biomass, and geothermal. Using animal manure and organic wastes as feedstocks for co-digestion to produce biogas is an attractive solution (Ahmed et al, 2021). It can be implemented by two methods of the agricultural biogas plants (Holm-Nielsen et al, 2009). The phenomena of joint biogas plants are pretty beneficial It is conducted by collecting animal manure from different farms and co-digesting it with organic residues from various places such as feed industries. Researchers showed that the AcoD of animal manure and food waste could produce a high amount of methane yield using batch and semi-continuous processes (Zhang et al, 2013). For scientists and engineers interested in the fundamental principles of AcoD, this article is a valuable resource
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