Single-stage biological treatment of coke-plant wastewaters with a hybrid suspended-growth-fixed-film reactor

Conference · Fri Jan 01 04:00:00 EST 1982 · Proc. Ind. Waste Conf.; (United States)

OSTI ID:5412417

Medwith, B W; Lefelhocz, J F

A single-stage, high-rate, hybrid suspended growth-fixed-film biological treatment process has been developed for simultaneous carbonaceous and ammonia-nitrogen oxidation of coke plant wastewaterrrs by combining the advantages of the rotating biological surface and the suspended growth activated sludge technologies. This process includes the physicochemical pretreatment steps of oil and grease removal, ammonia and acid gas stripping, and equalization which are required to make the wastewate amenable to biological oxidation. Phosphate nutrient (500 to 800 mg/gal wastewater feed) is added to the pretreated wastewater. The wastewater is then diluted in the range of 1 to 5 parts wastewater per one part river water and metered into a biological aeration basin which contains finely divided coke breeze or coal dust as an inert support. The finely ground (40% minus 325-mesh) substrate materials are added to yield a 0.3 to 0.7 to 1 biomass/inert support ratio at a total aeration basin mixed liquor suspended solids concentrations of 10 to 35 g/l. The inert substrate material acts as a site for biological growth and a weighting agent for increasing the size and density of the biomass. The biomass/inert support particles are easily separated from the effluent water in the clarifier and returned to the aeration basin.

• Research Organization: Republic Steel Corp., Independence, OH
• OSTI ID: 5412417
• Report Number(s): CONF-810577-
• Conference Information: Journal Name: Proc. Ind. Waste Conf.; (United States) Journal Volume: 36
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AMMONIA
BIOCONVERSION
CARBON
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COKE
COKE BREEZE
COKING PLANTS
DENITRIFICATION
DUSTS
ELEMENTS
ENERGY SOURCES
FILMS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
HYDRIDES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MANAGEMENT
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXIDATION
OXYGEN COMPOUNDS
POWER PLANTS
PROCESSING
REMOVAL
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMAL POWER PLANTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER