Back to results
US 5,490,933 AGranted
Self-regulated biological scrubber and/or gas stripper for the treatment of fluid streams
AssigneeThe Dow Chemical Company
InventorsMark A. LaPack, Terry J. Nestrick, William F. Martin, Gary M. Klecka
Life of this patent
Estimating the term…
Abstract
This invention relates to a self-regulated apparatus and method for extracting biodegradable and/or strippable constituents from a fluid stream by the action of biomass which consumes or degrades such substances or by gas stripping. Such self-regulation permits the monitoring and optimization of the bioactivity of the system and the overall degree of treatment of the fluid stream.
Claims12
A process for treating a liquid stream comprising:
- (a) introducing into a treatment zone at a first volumetric flow rate a liquid influent stream containing at least one constituent which may be reduced in concentration by a biodegradation treatment, the influent stream being characterized by a first mass flow rate of each of the constituents introduced;
- (b) treating the influent stream in the treatment zone to reduce the concentration of the at least one constituent by biodegrading with an effective biomass;
- (c) discharging from the treatment zone a liquid effluent stream at a second volumetric flow rate, the effluent stream being characterized by a second mass flow rate of each of the constituents or by-products thereof;
- (d) making an on-line determination of the first mass flow rate of at least one constituent and the second mass flow rate of the constituent or a by-product thereof;
- and
- (e) adjusting at least one of either the first mass flow rate or the second mass flow rate in response to the determination of step (d).
3 more elements
A process for treating a liquid stream in conjunction with a biodegradation treatment, the process comprising the steps of:
- (a) introducing into a treatment zone at a first volumetric flow rate a liquid influent stream containing at least one constituent which may be reduced in concentration by a gas stripping treatment, the influent stream being characterized by a first mass flow rate of each of the constituents introduced;
- (b) treating the influent stream in the treatment zone to reduce the concentration of the at least one constituent by gas stripping,
- (c) discharging from the treatment zone a liquid effluent stream at a second volumetric flow rate, the effluent stream being characterized by a second mass flow rate of each of the constituents or by-products thereof;
- (d) making an on-line determination of the first mass flow rate of at least one constituent and the second mass flow rate of the constituent or a by-product thereof;
- and
- (e) adjusting at least one of either the first mass flow rate or the second mass flow rate in response to the determination of step (d).
3 more elements
Dependencies are inferred from the claim text.