Economic Issues in the Composting of Sewage Sludges
نویسندگان
چکیده
منابع مشابه
Composting of Municipal Wastewater Sludges
Ohio) provided substantive guidance and review. Agency and approved for publication. The process alternatives, trade names, or commercial products are only examples and are not endorsed or recommended by the U.S. Environmental Protection Agency. Other alternatives may exist or may be developed. In addition , the information in this document does not necessarily reflect the policy of the Agency,...
متن کاملOrganic chemicals in sewage sludges.
Sewage sludges are residues resulting from the treatment of wastewater released from various sources including homes, industries, medical facilities, street runoff and businesses. Sewage sludges contain nutrients and organic matter that can provide soil benefits and are widely used as soil amendments. They also, however, contain contaminants including metals, pathogens, and organic pollutants. ...
متن کاملBiodegradation of Lignocelluloses in Sewage Sludge Composting and Vermicomposting
Aims of the Study: The aim of this study was to determine the amount of lignin degradation and biodegradation of organic matter and change of biomass under compost and vermicomposting of sewage sludge. Materials & Methods: Sawdust was added to sewage sludge at 1:3 weight bases to Carbon to Nitrogen ratio of 25:1 for composting or vermicomposting. Lignin and volatile solids were deter...
متن کاملChanges in chemical and biological parameters during co-composting of anaerobically digested sewage sludges with lignocellulosic material.
This study reports a pilot experiment of composting of anaerobically digested sewage sludges deriving from the production of biogas in a wastewater treatment plant. Two composting piles (about 15 m(3) each) were prepared by mixing 50% and 30% (v/v) sludges with lignocellulosic material. The composting process was monitored through determination of the main physicochemical properties. The stabil...
متن کاملA steady state model for anaerobic digestion of sewage sludges
A steady state model for anaerobic digestion of sewage sludge is developed that comprises three sequential parts – a kinetic part from which the % COD removal and methane production are determined for a given retention time; a stoichiometry part from which the gas composition (or partial pressure of CO2), ammonia released and alkalinity generated are calculated from the %COD removal; and a carb...
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ژورنال
عنوان ژورنال: Journal of the Northeastern Agricultural Economics Council
سال: 1979
ISSN: 0163-5484
DOI: 10.1017/s0163548400004908