ARAÚJO, L. S.; http://lattes.cnpq.br/0504749880267981; ARAÚJO, Luiz de Souza.
Resumo:
In this thesis, an experimental investigation is
described which objective was to evaluate the influence of
the composition of activated sludge an stabilization by
anaerobic digestion. For this five sludge were generated
from domestic sewage, with active ( life bacterial mass)
fraction ranging from 15 to 72 per cent of the volatile
solids concentration. These sludges were digested in
conventional anaerobic digestors at room temperatures of
(25±3)°C and a retention time of 20 days.
During the which investigation the digestors
functioned efficiently without any need of addition of
corrective Chemicals. It was noted thet the composition of
the sludge to be digested influenced markedly upom the
quantity of methan generated per unit mass of organic
sludge and increased as the active fraction increased.
Similarly the solids decay i s influenced: the larger the
active fraction the larger the solds decay. It was also
observed that the alkalinity general in the digestor
corresponded to the mineralization of amônia.
