Deodorization of Offensive Odor from Swine Feces Composting by Activated Sludge Aeration Method

Characterization of sludge from the extended aeration system to the activated-sludge system.

Odor composition analysis and odor indicator selection during sewage sludge composting

UNLABELLED On the basis of total temperature increase, normal dehydration, and maturity, the odor compositions of surface and internal piles in a well-run sewage sludge compost plant were analyzed using gas chromatography-mass spectrometry with a liquid nitrogen cooling system and a portable odor detector. Approximately 80 types of substances were detected, including 2 volatile inorganic compou...

Bio-Oxidation of Air-Borne Hydrophobic VOCs in Activated Sludge Aeration Tanks-Effects of Activated Sludge Concentration and Gas Diffuser

An activated sludge aeration basin (20 cm i.d., 140 cm height) equipped with either a coarse air diffuser (a plastic pipe perforated with 56 orifices of 2 mm in diameter) or a fine diffuser (porous plastic type with 100-micrometer pores) was utilized to treat an air-borne hydrophobic VOC (toluene, 700-800 mg/m). The purposes of this study were to test the influences of both MLSS and diffuser ty...

Heavy Metals Removal from Sewage Sludge and Municipal Solid Waste (MSW) by Co-Composting Process

Background & Aims of the Study: One of the most important pollutants in drinking water, air and soils is heavy metals. It is very harmful for humans and other live organisms. The purpose of this study was the usage of a co-composting process for removal of heavy metals from municipal solid waste and sewage sludge. Materials and Methods: This experimental study was a condu...

Adsorption of Cd(II) by Dried Activated Sludge