Problems Encountered during the Start-up of UASB Reactors.

Some problems encountered in administering Head Start.

The local, federally-funded Project Head Start is designed primarily t o prepare the pre-school children of Washtenaw County’s low-income families t o enter kindergarten. In addition t o instruction in the verbal, cognitive, and social skills that the children need t o become successful in school, the program provides a nourishing hot lunch, complete dental and medical examinations, and the nec...

Enhancing Biogas Production and UASB Start-Up by Chitosan Addition

Quality Assessment of Full-Scale Municipal Wastewater Treatment Plant consisting UASB Reactors and Polishing Ponds during its Start-up Phase in India

Amongst the technologies available, the upflow anaerobic sludge blanket (UASB) process has been one of the most widely applied methods for municipal wastewater treatment especially in countries of warm climatic conditions like India. However, past about one decade has witnessed rapid decline in the UASB popularity and its implementation. There has been criticism from various sections on the per...

Community analysis of ammonia and nitrite oxidizers during start-up of nitritation reactors.

Partial nitrification of ammonium to nitrite under oxic conditions (nitritation) is a critical process for the effective use of alternative nitrogen removal technologies from wastewater. Here we investigated the conditions which promote establishment of a suitable microbial community for performing nitritation when starting from regular sewage sludge. Reactors were operated in duplicate under d...

Dynamic Modeling of Granular Sludge in UASB Reactors

n this paper, a mathematical model has been derived to predict the granulation time of anaerobic sludge in UASB reactors. In the proposed model, some physical, chemical and biological parameters affecting the granulation phenomena have been considered. To validate the model, 12 pilot-scale experiments in 4 UASB reactors are carried out and the results are discussed here. The reactors are starte...