B. Dalmacija et al., TERTIARY-TREATMENT OF OIL-FIELD BRINE IN A BIOSORPTION SYSTEM WITH GRANULATED ACTIVATED CARBON, Water research, 30(5), 1996, pp. 1065-1068
This work describes the possibility of application of a biosorption sy
stem with granulated activated carbon (GAG) for the tertiary treatment
of oil-field brine. In addition to the dissolved and dispersed oil, t
he oil-field brine contained about 29 g/l of mineral matter, mainly Na
Cl. The investigation was carried out on two columns, each containing
300 g of GAG. To form the biofilm on GAC use was made of the microorga
nisms from the setup for the purification of refinery wastewaters by a
ctivated sludge procedure. The wastewater flow-rate through the column
s was 40, 70, 95 and 130 l/d. It was found that the activated carbon i
n the columns was capable of removing 2.6 times more organic matter th
an was its adsorption capacity, and its adsorption power was not thus
exhausted. The results indicate that the microorganisms present in the
biofilm on activated carbon oxidize the adsorbed pollutants and thus
regenerate the carbon surface. The procedure employed was very efficie
nt-the organic matter content in the effluent did not exceed 2.5 mg/l
(BOD5). Copyright (C) 1996 Elsevier Science Ltd.