Use of coagulants to treat coking plant waste water

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Coke Chem. USSR (Engl. Transl.); (United States)

OSTI ID:7128063

Vinarskii, N S; Biliznyukova, M I; Grinberg, A M; Miryorodskaya, A V; Vychegzhanina, G V

The biochemical treatment facilities of waste water at many coke plants provide high level of treatment, but in the water after the secondary sedimenters there is an increase in the concentration of suspended matter from 25-40 to 200-300 mg/l due to activated sludge particles. This high concentration of suspended matter in the water after the sedimenters is due not only to the quality and properties of the activated sludge, but also to the presence of substances with flotation properties in the waste water. The stringent specifications for quality of the waste water, related to the necessity of using it in recycled water cooling systems, pose the problem of removing suspended solids to a residual concentration of 20-30 mg/l. (3). At the present time about 90% of the suspended solids is precipitated in secondary sedimenters of biochemical treatment plants by 1.5 hr of sedimentation. Their initial concentration in the water entering the sedimenters is 3-5 g/l when using activated sludge treatment and about 0.5 g/l when using the microbial treatment method. An attempt to improve the degree of removal of organic contaminants from the waste water by increasing the concentration of biomass in the air tanks naturally leads to an increase in the quantity of suspended matter discharged from the secondary sedimenters. In order to intensify the precipitation of suspended solids, the authors used various coagulants: aluminum 2,5-hydroxychloride, aluminum sulfate, iron chloride and iron (II) sulfate.

• Research Organization: UKhIN Research Institute of Coal Chemistry, KhIIKS
• OSTI ID: 7128063
• Journal Information: Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 3; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401 -- Coal & Coal Products-- Carbonization-- (-1987)
010800* -- Coal
Lignite
& Peat-- Waste Management
ACTIVATED SLUDGE PROCESS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM SULFATES
ANTITHYROID DRUGS
AROMATICS
CARBONIC ACID DERIVATIVES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COKING PLANTS
CONTROL
COOLING SYSTEMS
DEPHENOLIZATION
DISPERSIONS
DRUGS
ELEMENTS
ENERGY SYSTEMS
FLOCCULATION
FLOTATION
HALIDES
HALOGEN COMPOUNDS
HORMONE ANTAGONISTS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
IRON CHLORIDES
IRON COMPOUNDS
IRON SULFATES
LIQUID WASTES
MANAGEMENT
METALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PHENOLS
PRECIPITATION
PROCESSING
QUALITY CONTROL
QUANTITY RATIO
RECYCLING
SEDIMENTATION
SEPARATION PROCESSES
SLUDGES
SOLIDS
SPECIFICATIONS
SULFATES
SULFUR COMPOUNDS
SUSPENSIONS
THIOCYANATES
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT