Anaerobic digestion is a process which breaks down organic matter in simpler chemicals components without oxygen. This process can be very useful to treat arising organic waste such as:-sewage sludge-organic farm wastes-municipal solid wastes-green/botanical wastes-organic industrial and commercial wastes Before being digested, the feedstock has to und ergo pre-treatment. There are various type...

Hydrolysis is the most critical stage in high solids Temperature Phased Anaerobic Digestion (TPAD). In this paper two different Organic Fraction of Municipal Solid Waste (OFMSW) types were tested co-digestion with Digested Sludge (DS) at temperatures: 37, 55 and 65 °C. Volatile fatty acids (VFAs), soluble chemical oxygen demand (CODs) Biochemical Methane Production (BMP) measured calculated aft...

This paper examines the influence of biomass directed to anaerobic digestion on quality digestate, specifically focusing presence undesirable substances, such as plastics, including biodegradable ones. It analyses susceptibility selected bioplastics degradation and addresses problem reliable identification microplastics in both feedstock—directed digestion—and produced digestate. The review ind...

Anaerobic Digestion has become a promising technology for biological transformation of organic fraction of the municipal solid wastes (MSW). In order to represent the kinetic behavior of such biological process and thereby to design a reactor system, development of a mathematical model is essential. Addressing this issue, a simplistic mathematical model has been developed for anaerobic digestio...

High solid anaerobic digestion (HSAD) is a rapidly developed anaerobic digestion technique for treating municipal sludge, and has been widely used in Europe and Asia. Recently, the enhanced HSAD process with thermal treatment showed its advantages in both methane production and VS reduction. However, the understanding of the microbial community is still poor. This study investigated microbial c...

Using a previously developed filter adsorption technique, the inactivation of a human rotavirus, a coxsackievirus B5, and a bovine parvovirus was monitored during sludge treatment processes. During conventional anaerobic mesophilic digestion at 35 to 36 degrees C, only minor inactivation of all three viruses occurred. The k' values measured were 0.314 log10 unit/day for rotavirus, 0.475 log10 u...

Anaerobic digestion has been widely applied for waste activated sludge (WAS) treatment. However, methane production from anaerobic digestion of WAS is usually limited by the slow hydrolysis rate and/or poor biochemical methane potential of WAS. This work systematically studied the effects of three different types of zero valent iron (i.e., iron powder, clean scrap and rusty scrap) on methane pr...

A pig slurry treatment strategy must include processes with the aim of reducing volatile organic compound emissions, controlling odours, mineralising nutrients, improving its fertilising proprieties, and recovering energy, when it is possible. In this sense, anaerobic digestion fulfils all this requirements. However, in areas with high animal farming density and a structural nutrient surplus, i...

. Abstract: The practice of using cow dung for soil conditioning and fertilization dates back to the early history of man, even though, it has received greater attention in recent times due to high cost of chemical fertilizer as well as the environmental impacts on sustainable agriculture. This study explores the three methods of cow dung stabilization namely: composting in 3m depth compost pit...