Hasil untuk "Municipal refuse. Solid wastes"

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CrossRef 2017
The chemistry of solid wastes

Gary W. VanLoon, Stephen J. Duffy

This chapter discusses the chemistry of solid wastes. It looks at how best to make use of them in creative ways that cause little adverse impact on the natural environment. It looks at the various types of bulk solid wastes and their potential to be useful resources, as well as at the chemical issues related to managing wastes from mining and metal production. It outlines the uses of organic wastes, especially as compost and as an energy source, and the processes that can be used to manage mixed urban wastes and the related environmental considerations. The chapter mentions bulk solid wastes, which are produced as a by-product of the normal and fundamental activities of living. These include food scraps, ash from fires, and excreta from humans and animals. It refers to the circular economy, which turns goods at the end of their service life into resources for others.

CrossRef 1986
Anaerobic Digestion of Municipal Solid Wastes

W. Schmidell, A. M. Craveiro, C. S. Peres et al.

This paper discusses the present state of municipal solid waste (MSW) disposal in Brazil , focusing on the particular situation in the City of Sao Paulo, and indicates the future trend of the anaerobic digestion approach for this residue. Also, some results, representative of several studies developed at IPT on anaerobic digestion of MSW mixed with primary sewage sludge, are presented. These studies were conducted using agitated reactors of 2 or 8 liters capacity, continuously operated at 35°C and in the pH range 6.8 to 7.2. The studies were on: start-up of reactors, MSW to sewage sludge ratio, organic loading rate and hydraulic retention time. The results presented in this paper indicate the great interest in achieving anaerobic digestion of MSW in presence of sewage sludge, utilizing reactors with high solids content, which is the approach already observed, and certainly will be developed in the future.

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