The present invention relates to a process for the separation of biomass in the anaerobic purification of wastewater and to a system for the separation of biomass in the anaerobic purification of wastewater.

The invention relates to a method for treating an aqueous fluid comprising a biodegradable organic substance in an installation comprising an upflow bioreactor containing a sludge bed, said sludge bed comprising biomass, an external separator, and a conditioning tank, comprising treating the fluid in the conditioning tank; feeding the treated fluid into a lower part of the bioreactor and forming biogas; withdrawing the fluid from an upper part of the bioreactor, which withdrawn fluid comprises biomass; feeding the aqueous fluid withdrawn from the upper part of the bioreactor into the external separator wherein the aqueous fluid comprising the biomass is separated into a liquid phase, and a fluid phase enriched in biomass; returning said fluid phase enriched in biomass from the external separator to the bioreactor; and returning a part of said liquid phase to the conditioning tank.

An induced sludge bed anaerobic reactor system that includes at least two stages of bioreactor processing, a first-stage feeding system, a second-stage feeding system, a pH balancing system, an effluent recirculation system, a gas management system, and a controller. In addition, any given stage of reactor processing may be comprised of a plurality of reactors that are configured to operate in parallel with each other.

There is disclosed a system and process for the anaerobic and aerobic treatment of landfill wastewater, including landfill condensate, landfill leachate and mixtures thereof.

A combination biological contactor and self-backwashing filter system for water treatment is disclosed. The system may include a treatment vessel defining an upper chamber and a lower chamber. A biological contactor may be disposed within the upper chamber, and a filter may be disposed in the lower chamber. A contactor outlet conduit and inlet manifold may be used to transfer water from the biological contactor to filter cells within the filter.

An induced sludge bed anaerobic reactor system that includes at least two stages of bioreactor processing, a first-stage feeding system, a second-stage feeding system, a pH balancing system, an effluent recirculation system, a gas management system, at least one nitrogen reduction system, and a controller. In addition, the nitrogen reduction system(s) if configured for reducing an amount of one or more nitrogen compounds in a substrate mixture sufficient to procedure a non-toxic substrate mixture with respect to anaerobic digestion of the non-toxic substrate by the induced sludge bed anaerobic reactor system.

A method for treating acrolein reactor wastewater, comprising the steps of: S1. mixing acrolein reactor wastewater and a carbonate aqueous solution to obtain a mixed solution, wherein the acrolein reactor wastewater has a pH value of less than 2 and contains 500 ppm to 3,000 ppm of acrolein, 50 ppm to 800 ppm of allyl alcohol, 40,000 ppm to 100,000 ppm of acrylic acid, 10,000 ppm to 30,000 ppm of formaldehyde, 3,000 ppm to 10,000 ppm of acetic acid and 3,000 ppm to 8,000 ppm of maleic acid; and the mixed solution has a pH value of 4 to 6, a COD concentration ranging from 7,500 ppm to 30,000 ppm, and a formaldehyde concentration ranging from 800 ppm to 4,000 ppm; S2. conveying the mixed solution obtained in step S1 to an anaerobic reactor (4) for biochemical treatment; and S3. conveying the solution treated in step S2 to an aerobic biochemical tank (5) for treatment; and reflowing at least one part of the solution treated in step S2 and/or S3 to step S2. Also provided is a device for treating acrolein reactor wastewater.

The present invention belongs to the technical field of wastewater treatment, and particularly relates to a method for pre-conditioning high-calcium wastewater by calcification blocking, and a device for implementing the method. The method for treating high-calcium wastewater by calcification blocking includes mixing high-calcium wastewater, an alkalizing agent and a chelating agent, and carrying out alkalizing conditioning pretreatment under a condition of stirring by bubbling of a biogas, so as to obtain pre-conditioned wastewater. The pre-conditioned wastewater is mixed with anaerobic granular sludge, and an anaerobic reaction is performed in a high hydraulic shear flow field formed by the biogas, so as to generate the biogas and calcium scale. A part of the biogas for the stirring is refluxed by bubbling of the biogas and the rest of the biogas is refluxed for forming the high hydraulic shear flow field.

A sewage/wastewater biological treatment systemsewage (wastewater) synergistic treatment acceleration device, which includes four components of a reaction assembly, a signal transmission assembly, a control assembly, and a housing carrying assembly. The reaction assembly can realize the colonization/proliferation of functional microorganisms, participate in the interface electron transfer between the electrode-microbe-sewage as an electron donor/receptor and electrode interface of the (bio)electrochemical reaction, and optimize the flow characteristics in the sewage/wastewater treatment system. The signal transmission assembly enables the conduction of applied voltage and real-time signal acquisition and transmission of key parameters. The monitoring assembly implements intelligent controllability of the present invention. The housing carrying assembly enables integrated assembly of single device and multi-device serial/parallel operation assembly.

The present invention discloses a high-concentration organic wastewater treatment reactor. A lower water distribution system, an upper water distribution system, a lower three-phase separator and an upper inclined plate separator are provided from bottom to top in a reactor body of the high-concentration organic wastewater treatment reactor. A gas-liquid separator is disposed on the top of the reactor body. The lower water distribution system and the upper water distribution system are connected to an influent pipe. A lower biogas ascending pipe connected to the gas-liquid separator is disposed on the top of the lower three-phase separator. An upper biogas ascending pipe and an effluent pipe are disposed above the upper inclined plate separator. An outlet end of the upper biogas ascending pipe is connected to the gas-liquid separator. A downcomer is disposed on the bottom of the gas-liquid separator. An air pipe is disposed on the top of the gas-liquid separator. The reactor of the present invention has the characteristics of low energy consumption, good effluent water quality, large biogas production, and no odor, is capable of enhancing the even water distribution and fully mixing sludge and water, have a high removal efficiency of pollutants. Moreover, an internal circulating water dilutes influent water. A system having a strong impact resistance ability and a reactor being operated stably for a long term are achieved.