Acid Fermentation Process for Sewage Sludge
as Sludge Recycling Technology
FUJIWARA Shigeki TSUBONE Toshiaki KIHARA Yasuhiko
Abstract
JFE Engineering developed “acid fermentation process
for sewage sludge” on commission from Japan Science
and Technology Agency. This technology aims to
decompose sewage sludge and recorver high levels of
organic acid from sewage sludge, using anaerobic bacteria,
alkalis, and ultrasonic treatment. The authors
report here the scheme of this process and the results
showing an average solid decomposition rate of 50.8%
secured by using a pilot scale plant of 2.5 m ³/d, under
the condition of fermentation tank at 30–35°C and retention
time in the fermentation tank of 2 days.
