Treatment of refinery wastewaters using various modified activated sludge processes

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6711151

Al-Muzaini, S M

Biological processes for treating refinery industry wastewater for reuse were studied. A pilot-scale biological reactor was constructed to simulate the activated sludge treatment process. Actual refinery industry wastewater collected from a regional refinery and spiked with additions of selected priority organics was fed at a rate of 1.3 liters/hour into a 6-liter pilot plant having a hydraulic retention time of 4 hours. Activated sludge (AS) which was augmented by additions of powdered activated carbon (PAC) at dosages of 10, 50 and 120 mg/l was evaluated. The AS process removed 70-80% of the BOD, COD and TOC. With the addition of PAC, removal efficiencies of the indicator compounds rose to 80-95%. The sludge physical parameters and kinetic constants were determined with and without the addition of PAC to the AS. PAC additions to the AS increased the amount of biomass in the reactor. Volatile compounds (benzene, chloroform, ethylbenzene, toluene, m-xylene and o-xylene) were removed from the reactor by volatilization which occurred from air stripping. PAC alone (without AS) was primarily responsible for removing base and acid/neutral-extractable compounds (2,4-dimethylphenol, fluorene, naphthalene and pyrene).

• Research Organization: Rhode Island Univ., Kingston (USA)
• OSTI ID: 6711151
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
ACTIVATED CARBON
ACTIVATED SLUDGE PROCESS
ADSORBENTS
AIR
ALKYLATED AROMATICS
AROMATICS
BENZENE
CARBON
CHEMICAL OXYGEN DEMAND
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
CONDENSED AROMATICS
EFFICIENCY
ELEMENTS
FLUIDS
FLUORENE
FUNCTIONAL MODELS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MANAGEMENT
MODIFICATIONS
NAPHTHALENE
NONMETALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC MATTER
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PETROLEUM REFINERIES
PHENOLS
PILOT PLANTS
PROCESSING
PYRENE
REMOVAL
TESTING
TOLUENE
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT
WATER TREATMENT PLANTS
XYLENES