Reduce oil and grease content in wastewater

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Hydrocarbon Processing; (United States)

OSTI ID:6426612

Capps, R W ^[1]; Matelli, G N; Bradford, M L ^[2]

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1. Pace Consultants, Inc., Houston, TX (United States)
2. Jacobs Engineering Group, Inc., Houston, TX (United States)

Poor water quality is often blamed on biological oxidation unit malfunction. However, poorly treated water entering the bio-unit is more often the problem. At the microscopic level, oil/water-separation dynamics are influenced by pH, fluid velocity, temperature, and unit volumes. Oily water's physical and chemical properties affect pretreatment systems such as API separators, corrugated plate interception (CPI) separators, air flotation and equalization systems. A better understanding of pretreatment systems' limits and efficiencies can improve wastewater quality before it upsets the biological oxidation (BIOX). Oil contamination in refinery wastewater originates from desalting, steam stripping, product treating, tank drains, sample drains and equipment washdown. The largest volumetric contributors are cooling tower blowdowns and contaminated stormwater. The paper describes the BIOX process; oil/water separation; oil/water emulsions and colloidal solutions; air flotation; surfactants; DAF (dissolved air flotation) process; IAF (induced air flotation) process; equalization; load factors; salts; and system design.

• OSTI ID: 6426612
• Journal Information: Hydrocarbon Processing; (United States), Vol. 72:6; ISSN 0018-8190
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
GREASES
SEPARATION PROCESSES
OILS
WASTE WATER
WATER TREATMENT
BIODEGRADATION
CONSTRAINTS
DESIGN
FLOTATION
FLOWSHEETS
INHIBITION
LOADING RATE
PETROLEUM REFINERIES
SALTS
SEPARATION EQUIPMENT
SURFACTANTS
CHEMICAL REACTIONS
DECOMPOSITION
DIAGRAMS
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
LUBRICANTS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
WASTES
WATER
020800* - Petroleum- Waste Management