Modeling composting processes is the prerequisite to realize the process control of composting. In this paper, a simulation model for domestic solid waste composting processes was developed based on microbial process kinetics, mass conservation equation, energy conservation equation and water balance. Differential equations describing microbial, substrate, oxygen concentrations, moisture conten...

Composting is the most viable treatment for biodegradable solid waste. Numerous techniques have been developed by different agencies to carry out composting. The common method aerobic bin carried on small scale. Compost piles and windrow methods needs larger land area are mainly industries. total time completion of composting depend upon type substrate employed. Moisture content, temperature, p...

One of the most versatile and remunerative techniques for handling biodegradable solid wastes is composting. Composting refers to aerobic degradation of organic material and is one of the main waste treatment methods used for treating separated organic waste. Microbes play a key role as degraders during the composting-process and microbiology of composting has been studied for decades. Microorg...

In order to increase the degradation rate of organic materials and reduce ammonia emissions simultaneously during the aerobic composting period, a commercial maturity-accelerating reagent (MAR) was employed. Comparative composting experiments were conducted: Run A with the addition of MAR in the composting mixture, and Run B without the addition of MAR, while some parameters such as organic car...

Four different tests to assess compost stability were compared during green waste composting in windrows at a largescale composting plant. The tests used were: germination index, (based on seed germination); SOUR (specific oxygen uptake rate, respirometric method based on O2 consumption by the microorganisms); self-heating test, (reflecting the energy output from the aerobic process); and Solvi...

This study demonstrates mathematical description of sewage sludge composting based on identification and separate characterisation of simple process parts. For a description of the microbial processes an aSM3-based mathematical model developed for autothermal thermophilic aerobic sludge digestion is used. The oxygen mass transfer was characterized in a separate way. The 2.964·10-3 m2·d-1 value ...

To ensure quick and uniform aerobic stabilization of biowaste through domestic composting and to prevent malodorous emissions, two modifications were made to a conventional steel barrel composter by: (1) providing 0.0125 m diameter openings throughout the sides and (2) placing a 0.0254 m diameter perforated polyvinyl chloride (PVC) pipe in the middle portion of the barrel. The volume of compost...

Corn waste, tithonia and cattle manure are three materials that have different characteristics. These charactersitics differences if used together in the composting process will complement each other potentially produce good compost. This research was conducted to find out how characteristics by utilizing raw with a process. The carried using berkeley method which stacked layered bioreactor. de...

The co-composting of olive oil mill wastes and household refuse was followed for 5 months. During the thermophilic phase of composting, the aerobic heterotrophic bacteria (AHB) count, showed a significant rise with a slight regression of fungal biomass. In the same way, phospholipid fatty acids PLFAs common in bacteria, showed a significant increase of hydroxyl and branched PLFAs. The evaluatio...