@article {12072, title = {Improved alkaline stabilization of municipal wastewater sludge}, journal = {Water Science and Technology}, volume = {46}, number = {10}, year = {2002}, note = {Mendez, J M
Jimenez, B E
Barrios, J A
eng
England
2002/12/14 04:00
Water Sci Technol. 2002;46(10):139-46.}, pages = {139-46}, abstract = {

In Mexico, physicochemical sludge contains high levels of pathogens; and alkaline stabilization is an alternative for their control. However, the odours caused mainly by ammonia generation represent a disadvantage. On the other hand, the ammonia is known as an effective disinfectant. The aim of this study was to evaluate the disinfectant properties of ammonia in sludge, and use it in a closed alkaline stabilization system, which, not only copes with odours but also increases the efficiency of the process. Raw sludge from a municipal wastewater treatment plant using a physicochemical process was used. Ammonia was applied in doses from 10 to 50\% w/w; also, doses from 5 to 40\% of CaO were applied in open and closed systems and raw and treated sludge quality was evaluated. Results showed that ammonia removed 6 and 5 logs of faecal coliforms and Salmonella spp., respectively and up to 94\% of viable helminth ova. The closed system was more efficient than the open system when applying doses from 5 to 20\% of CaO. Finally, the results indicate that the ammonia represents an alternative to disinfecting wastewater sludge and it can be used to enhance alkaline stabilization processes.

}, keywords = {Ammonia/*analysis, Disinfectants, Enterobacteriaceae/isolation \& purification, Hydrogen-Ion Concentration, Mexico, Salmonella/isolation \& purification, Sewage/*chemistry/microbiology, Waste Disposal, Fluid/*methods}, isbn = {0273-1223 (Print)
0273-1223 (Linking)}, author = {Mendez, J. M. and B E Jimenez and J A Barrios} }