Biological filter and process
A biological filter apparatus, and process for using the same, wherein organic pollutants in a waste water stream may be biologically degraded by a biomass of suitable microorganisms located on the surface of a packing. The filter comprises a sealed vessel in which the packing having the biomass thereon is located, and the waste water, mixed with several volumes of liquid recycle, is allowed to trickle downwardly through the packing countercurrently to ascending gases, effluent liquid is removed from the bottom of the vessel at a rate sufficient to maintain the level of effluent liquid below the packing in order to prevent the packing from being submerged in liquid. The apparatus and process are applicable to the anaerobic methanogenic processes wherein methane is produced as a product; and are also applicable to non-methanogenic processes which are conducted in the absence of added molecular oxygen wherein combined nitrogen is converted to molecular nitrogen. Extrinsic gases may be added to the filter at a point below the packing to aid in the degradation.
- Assignee:
- Celanese Corp
- Patent Number(s):
- US 4351729
- OSTI ID:
- 6736093
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320603* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
AEROBIC CONDITIONS
ALKANES
ANAEROBIC CONDITIONS
BIODEGRADATION
BIOLOGICAL MATERIALS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COUNTERFLOW SYSTEMS
DECOMPOSITION
ELEMENTS
FILTERS
GASEOUS WASTES
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MATERIALS
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PACKINGS
PROCESSING
RECYCLING
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER