Intensification of the biological treatment of coking plant waste water by ozone
At the present time the removal of phenols from waste water still presents significant difficulties. Thus, the development of more efficient and less expensive methods is a very important task. In recent years reports have been published on a combination of biological treatment with ozonation (1,2,5). The investigators believe that ozone releases oxidative phosphorylation in the bacteria, causing the oxidation of fatty acids by peroxides (3). According to other data, ozone may activate phenol molecules or catalyze oxidative processes (4). The work was conducted on water from the Moscow Coke Gas Plant and the Novolipetsk I and SW (Iron and Steel Works) using a culture of the yeast Candida tropicalis SD 5, capable of growing actively at high phenol concentration (to 0.2%). The process was investigated in a fermenter of the INMI-1 type at a temperature of 301 K, pH 6.8, and an air supply rate of 8 ml/sec. The culture was added in the quantity of 0.1 to 0.3 g/liter. The phenol concentration was measured with SF-4 and Specord spectrophotometers, and the growth of the culture was determined by a nephelometer on a type FEK-56 photocolorimeter with a green light filter. The optical density was measured using a 1 mm tube. The waste water purification was conducted both with pretreatment of the water with an ozone-air mixture containing 7-10.10/sup -3/ vol.% ozone for 300, 600, and 900 sec, and without pretreatment.
- Research Organization:
- MISiS
- OSTI ID:
- 6844044
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Vol. 4; Other Information: Translated from Koks i Khimiya, No. 4, 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COKING PLANTS
WATER TREATMENT
PHENOLS
BIODEGRADATION
OXIDATION
WASTE WATER
DEPHENOLIZATION
OZONIZATION
AIR FLOW
BACTERIA
CANDIDA
CARBOXYLIC ACIDS
CATALYSIS
MEDIUM TEMPERATURE
OPACITY
OPTICAL FILTERS
OZONE
PEROXIDES
PH VALUE
PHOSPHORYLATION
PURIFICATION
SPECTROPHOTOMETERS
AROMATICS
CHEMICAL REACTIONS
DECOMPOSITION
FILTERS
FLUID FLOW
FUNGI
GAS FLOW
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MEASURING INSTRUMENTS
MICROORGANISMS
OPTICAL PROPERTIES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLANTS
WASTES
WATER
YEASTS
010401* - Coal & Coal Products- Carbonization- (-1987)
400200 - Inorganic
Organic
& Physical Chemistry