摘要:
The invention relates to a bioreactor for biologically treating water fluid(s), and/or for producing a desired end product by biomass and/or for producing biomass. The invention relates also to method for manufacturing and using such a bioreactor. Said bioreactor (BR) comprises at least first processing unit (ZF), second processing unit (Z2), last processing unit (ZL), and optionally additional processing unit(s) (Z3,Z4) between second processing unit (Z2) and last processing unit (ZL) in a plug flow configuration; at least one forward circulation system (FCS, FCS1, FCS2) for circulating biomass (BM) from first processing unit (ZF), to last processing unit (ZL) and/or to additional processing unit(s) (Z3, Z4), and at least one reverse circulation system (RCS, RCS1, RCS2) for circulating biomass (BM) from last processing unit (ZL) and/or from additional processing unit(s) (Z3, Z4) to first processing unit (ZF).
摘要:
An effective amount of at least one nitrogen-containing compound may be added to a wastewater stream within a water treatment system. The wastewater stream may have or include an aqueous-based fluid, a first bacteria, a second bacteria, organic acids, and combinations thereof. The first bacteria may be or include, but is not limited to, filamentous bacteria, Zoogloea bacteria, and combinations thereof. The second bacteria may be or include, but is not limited to facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof. The addition of the nitrates to an anoxic zone within the wastewater treatment system may at least partially reduce the amount of the first bacteria within the wastewater stream as compared to an otherwise identical wastewater stream in the absence of the nitrogen-containing compound(s).
摘要:
There are provided processes for treating wastewater. The processes can comprise treating a mixture comprising the wastewater and an activated sludge, in a single reactor, with an electric current having a density of less than about 55 A/m2, by means of at least one anode and at least one cathode that define therebetween an electrical zone for treating the mixture; exposing the mixture to an intermittent ON/OFF electrical exposure mode to the electric current in which an OFF period of time is about 1 to about 10 times longer than an ON period of time; and maintaining an adequate oxidation-reduction potential in the single reactor. Such processes allow for substantial removal of carbon, nitrogen and phosphorus from the wastewater in the single reactor of various forms and for obtaining another mixture comprising a treated wastewater and solids.
摘要:
The method of producing aerobic biogranules for the treatment of waste water comprising the steps of: a) introducing waste water into a reactor; b) seeding the reactor with a active biomass material; c) supplying the oxygen-containing gas to the reactor to provide a mixing action to the suspension of biomass material in said waste water, the supply of oxygen-containing gas providing a superficial upflow gas velocity greater than 0.25 cm/s; d) initiating a period of nutrient starvation of the biomass material while continuing to supply oxygen-containing gas; e) allowing formed aerobic granules to settle in a settling zone in said reactor; f) discharging at least a portion of the waste water; g) repeating steps (a) to (f) until at least a portion of the biogranules in said settling zone are within a predetermined properties; and h) recovering said biomass granules within those predetermined properties.
摘要:
A method of treating sewage sludge comprises incubating raw sludge at a temperature in the mesophilic range to reduce the pathogen content of the sludge.
摘要:
The present invention refers to the fields of Environmental Engineering and Microbiology, being related to Energy Conservation and Waste Management. More specifically, the present invention provides an equipment and a method for on-site and ex-situ modulation of microbial consortia useful in liquid and semi-solid effluents or solid waste treatment systems, for removing and/or reusing undesirable organic or inorganic loads. The equipment of the invention consists of a main cultivation tank or a liquid body provided with an ex-situ subsystem for modulating microbial consortia for subsequent or concomitant introduction into the main cultivation tank or reactor or into the liquid body. In one embodiment, the on-site and ex-situ process of the invention is implemented in a culture equipment with controlled conditions for introducing the microorganism-enriched material into the effluent or solid waste to be treated, in the form of pre-cultivation and/or co-cultivation. In another embodiment, the ex-situ subsystem of the invention comprises a device for forming gas/air bubbles in a liquid suitable for applying a shearing force to the microorganisms present in the subsystem, and also useful for modulating the microbial consortia in a main cultivation tank or a liquid body. The invention substantially enhances the performance of effluent treatment systems, increasing the capacity of already installed units and/or reducing the cost of installation of new units; it allows the use of effluents as biomass for the biotransformation and generation of products of economic interest.
摘要:
A method and an apparatus for biological wastewater treatment that includes a biological selector and a physical selector. The apparatus comprises an internal biological reactor where wastewater and recycled biomass are combined to provide a high substrate and high electron acceptor gradient for generating morphological biomass features that favor granule formation over floc and filament formation, and an external gravimetric or external screen selector operating on the biomass waste stream for collecting and retaining densified biomass aggregates including dense granule selection and for wasting lighter filaments and flocs. In the method and apparatus, particles may be added to provide cores to promote the formation of aggregates encapsulating the seeded particles. The particles may be added as various materials, for example, in the bioreactor, to initiate or seed the formation of a granule, that could then be separated by or integrated with either the external gravimetric or external screen selector. Further, organisms may be selected for biological phosphorus removal, denitrifying methane oxidizers, biological sulfur or sulfide oxidation, methanogenesis.