M. Juanico, THE PERFORMANCE OF BATCH STABILIZATION RESERVOIRS FOR WASTE-WATER TREATMENT, STORAGE AND REUSE IN ISRAEL, Water science and technology, 33(10-11), 1996, pp. 149-159
Citations number
37
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Stabilization reservoirs receive partially treated wastewater effluent
s for storage and controlled release. They are used in Israel for two
purposes: a) to upgrade the quality of the effluents during the long r
esidence time within the reservoirs and, b) to store the effluents dur
ing the rainy winter in order to perform agricultural irrigation durin
g the dry summer. The improvement obtained in the quality of the efflu
ents (i.e., the treatment capacity of the reservoirs) depends on the o
perational regime of the reservoirs as reactors: continuous flow, in s
eries, batch, etc. The performance of the reservoirs as batch reactors
for wastewater treatment is herein analyzed based on outdoor experime
nts carried out in real scale reservoirs with different hydraulic and
organic loadings. The results of the experiments are compared with for
ecasts obtained through statistical and kinetic models. Stabilization
reservoirs working in batch mode, when properly designed and operated,
are able to remove GOD, BOD, TSS and detergents by up to one order of
magnitude, and Faecal coliforms by up to five orders of magnitude (be
fore chlorination). A significant removal of heavy metals, bacteriopha
ges and other pollutants is also obtained. The quality of the effluent
s released from the reservoirs, added to the capabiblity for controlle
d release, permits both wide crop rotation and easy management of irri
gation. Copyright (C) 1996 IAWQ.