摘要:
The invention provides a method for wastewater treatment, in a flow-continuous system, and a plant for wastewater treatment, in particular for a requirement of high level reduction of biogenic nitrate compounds. The method for wastewater treatment, by means of subjecting wastewater to consecutive steps of removal of various forms of impurities included therein, as a result of which depletion of readily available and averagely available carbon occurs, and then subjecting a mixture of active sludge and wastewater to vacuum degassing in a tower (7) for vacuum degassing, consists on that the mixture of active sludge and wastewater subject to earlier nitrification, but not introduced in the recirculation-return connection (2), and constituting the outflow from a nitrification volume (3), before vacuum degassing thereof, is subject to additional denitrification within the volume (4). Preferably, to the mixture of active sludge and wastewater, free, due to the additional denitrification step, of substantially majority of any kind of hardly available carbon carried along with wastewater, any kind of external source of readily available carbon is introduced, and further deepened nitrates removal is performed within the volume (5), where thus initiated nitrates removal process, after wastewater is passed through the vacuum degassing step, continues within a gaseous nitrogen undersaturated aqueous zone of a secondary sedimentation tank (8).
摘要:
An apparatus comprises a concentrated mixed liquor driving device which uses a gas for driving the concentrated liquor to flow The gas can be an oxygen-containing gas, especially an oxygen-containing aeration gas after aeration treatment. Also provided is a method for biological sewage treatment, which comprises a step of using the gas for driving the concentrated mixed liquor to flow.
摘要:
A plant (1) is described for the abatement of the nitrogen load of organic waste (6) of zootechnical farming, along with its relative method. The plant comprises a combination of at least one extraction and mixing tank (2), at least one dilution tank (3) and at least one culture tank (4), connected in series and cascade. The tank (4) contains a suspension culture of one or more native strains of microalgae previously isolated from the organic waste (6) to be treated.
摘要:
Procedimiento de obtención de polihidroxialcanoatos a partir del agua residual de la industria cervecera. Procedimiento de obtención de polihidroxialcanoatos que consiste en tres etapas: una fermentación acidogénica del efluente residual de una industria cervecera en un reactor para la obtención de ácidos grasos volátiles, alimentación del efluente fermentado obtenido en la anterior a un reactor que contiene un cultivo mixto de microorganismos con objeto de seleccionar una biomasa con alta capacidad de acumulación de polihidroxialcanoatos, y alimentación de forma discontinua y mediante la adición de pulsos consecutivos del efluente fermentado obtenido en la primera etapa a un reactor que contiene la biomasa seleccionada en la segunda etapa.
摘要:
In a sewage treatment plant that includes anaerobic digestion, ammonia-laden filtrate from anaerobic digestion is treated for breakdown of ammonia and optionally for removal of nitrogen, while at the same time thickening the waste activated sludge, preferably with membrane thickeners. This is efficiently done in a two stage process. Liquid filtrate from this subsystem can then be sent back to the head of plant or it can be disinfected. Preferably the filtrate discharged from the subsystem is denitrified, although in some plants it may be desirable to retain some of the nitrates for odor reduction at the head of plant, providing oxygen to neutralize hydrogen sulphide.
摘要:
Systems and methods for performing anaerobic digestion of biomaterials using a clarifier, a batch reactor, and/or a digester are disclosed. The clarifier performs pretreatment processing of biomaterial to improve anaerobic digestion. The batch reactor and/or the digester are coupled to the clarifier and are configured to digest the processed biomaterial. A control system for an anaerobic digestion process includes a flow control system, a temperature control system, and a totalization system. The flow control system controls the flow of biomaterial and the delivery of chemical agents to the biomaterial based on conductivity, temperature, pressure, and/or composition of the biomaterial. The temperature control system includes a heat source and heat exchangers that control the temperature of the biomaterial. The totalization system senses the volume of biomaterial in at least one stage of an anaerobic digestion process and a controller controls the flow control system based upon the sensed volume of biomaterial.
摘要:
A liquid waste treatment system is described. The system may include a first treatment conduit, a second treatment conduit, and at least one junction pipe disposed there between. In some instances, the system may include an upper junction pipe and a lower junction pipe disposed between a first and a second treatment conduit. In one or more embodiments, the system may be arranged in a substantially linear arrangement, such as a straight trench arrangement or a serial distribution arrangement. The system may reduce the need for additional treatment conduits.
摘要:
In a sewage treatment plant that includes anaerobic digestion, ammonia-laden filtrate from anaerobic digestion is treated for breakdown of ammonia and optionally for removal of nitrogen, while at the same time thickening the waste activated sludge, preferably with membrane thickeners. This is efficiently done in a two stage process. Liquid filtrate from this subsystem can then be sent back to the head of plant or it can be disinfected. Preferably the filtrate discharged from the subsystem is denitrified, although in some plants it may be desirable to retain some of the nitrates for odor reduction at the head of plant, providing oxygen to neutralize hydrogen sulphide.
摘要:
The present invention is directed to equipment, systems and methods for the biological removal of nitrogen from wastewater. The ammonium removal processes disclosed herein can be used in both batch and continuous flow biological reactors with real time control of nitrogen loading to effectively cultivate ammonium oxidizing bacteria alone, as well as in a mixture of ammonium oxidizing bacteria with anaerobic ammonium oxidizing bacteria in a single bioreactor. Both batch and continuous flow biological reactors have a mean of separating solids retention time (SRT) of suspended nitrifying biomass from suspended anammox biomass.