In some embodiments, the present disclosure relates to a system for treating an intake fluid comprising a contaminant, the system comprising a strainer configured to receive the intake fluid and separate the intake fluid into a first retentate and a strained filtrate; a filtration unit connected to the strainer through a strained fluid connector, the strained fluid connector configured to facilitate transfer of the strained filtrate from the strainer to the filtration unit, wherein the filtration unit is configured to separate the strained filtrate into a second retentate and a filtration unit filtrate; a fixed film biological filter connected to the filtration unit through a filtrate connector, the filtrate connector configured to facilitate transfer of the filtration unit filtrate from the filtration unit to the fixed film biological filter, wherein the fixed film biological filter is configured to reduce a biological oxygen demand of at least one of the filtration unit filtrate and a contaminant concentrating module permeate to form a permeate; and a CCM connected to a first retentate connector and a second retentate connector, the first retentate connector configured to facilitate transfer of the first retentate from the strainer to the CCM, the second retentate connector configured to facilitate transfer of the second retentate from the filtration unit to the CCM, wherein the CCM is configured to separate each of the first retentate and the second retentate into a third retentate and the contaminant concentrating module permeate.

In some embodiments, the present disclosure relates to a system for treating an intake fluid comprising a contaminant, the system comprising a strainer configured to receive the intake fluid and separate the intake fluid into a first retentate and a strained filtrate; a filtration unit connected to the strainer through a strained fluid connector, the strained fluid connector configured to facilitate transfer of the strained filtrate from the strainer to the filtration unit, wherein the filtration unit is configured to separate the strained filtrate into a second retentate and a filtration unit filtrate; a fixed film biological filter connected to the filtration unit through a filtrate connector, the filtrate connector configured to facilitate transfer of the filtration unit filtrate from the filtration unit to the fixed film biological filter, wherein the fixed film biological filter is configured to reduce a biological oxygen demand of at least one of the filtration unit filtrate and a contaminant concentrating module permeate to form a permeate; and a CCM connected to a first retentate connector and a second retentate connector, the first retentate connector configured to facilitate transfer of the first retentate from the strainer to the CCM, the second retentate connector configured to facilitate transfer of the second retentate from the filtration unit to the CCM, wherein the CCM is configured to separate each of the first retentate and the second retentate into a third retentate and the contaminant concentrating module permeate.

A device and method for treating urban domestic sewage based on a two-stage combined process of partial denitrification-anammox belong to the field of biological sewage treatment. The device includes a raw water tank, a sequencing batch biofilm reactor (SBBR), an intermediate water tank, an up-flow anaerobic sludge bed (UASB) and a water outlet tank. A part of urban domestic sewage enters the SBBR and is mixed with residual sewage in the last cycle, a partial denitrification-anammox reaction is carried out under a stirring condition to remove nitrate nitrogen and a part of ammonia nitrogen, followed by a nitrification under an aeration condition to completely convert ammonia nitrogen into nitrate nitrogen, and effluent enters the intermediate water tank; and the other part of the urban domestic sewage is mixed with the effluent of the SBBR and continuously enters the UASB, and nitrite nitrogen, which is generated by nitrate nitrogen reduction, and ammonia nitrogen, are removed by means of anammox. According to the present invention, with no need of adding an external carbon source, organic matters in sewage can be effectively removed, the nitrogen removal efficiency of urban domestic sewage is improved, and efficient and low-consumption nitrogen removal is realized.

Solid waste, for example source separated organics (SSO) or commercial and industrial (C&I) waste or both, are treated by first pressurizing the waste against a screen to produce a solids fraction and a liquid fraction. The liquid fraction can be treated in an anaerobic digester. The solids fraction is pulverized or milled, for example with a hammer mill, preferably after being diluted. The pulverized or milled waste is separated again to provide a second solids faction and a second liquid fraction. The liquid fraction can be treated in an anaerobic digester. The solids fraction is primarily inert and can be landfilled, preferably after being washed.

Solid waste, for example source separated organics (SSO) or commercial and industrial (C&I) waste or both, are treated by first pressurizing the waste against a screen to produce a solids fraction and a liquid fraction. The liquid fraction can be treated in an anaerobic digester. The solids fraction is pulverized or milled, for example with a hammer mill, preferably after being diluted. The pulverized or milled waste is separated again to provide a second solids faction and a second liquid fraction. The liquid fraction can be treated in an anaerobic digester. The solids fraction is primarily inert and can be landfilled, preferably after being washed.

A method for treating an aqueous fluid containing a biodegradable organic substance in an installation that includes an upflow bioreactor containing a sludge bed, wherein the sludge bed includes biomass, an external separator, and a conditioning tank. The method includes 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 includes biomass; feeding the aqueous fluid withdrawn from the upper part of the bioreactor into the external separator, wherein the aqueous fluid that includes the biomass is separated into a liquid phase and a fluid phase enriched in biomass; returning the fluid phase enriched in biomass from the external separator to the bioreactor; and returning a part of the liquid phase to the conditioning tank.

Disclosed herein are systems and processes for treating a Waste Stream comprising biosolids, the Waste Stream provided at varying flow rates and solids concentrations so as to achieve an SOUR of 1.5 mg O.sub.2/g/hr or less and an ORP of at least +300 mV. The system includes a biosolids manipulation device to adjust the volume of suspended solids as a percent of the total volume of the Waste Stream to five (5) percent or less; a chemical oxidant feed device to dose the Waste Stream with an oxidant such as chlorine dioxide, ozone, or similar oxidant, and a treatment vessel associated with said chemical oxidant feed device through which said Waste Stream flows, wherein said chemical oxidant feed device and said treatment device are configured so as to achieve a dose rate between 25 and 200 parts per million of the Waste Stream and substantially complete mixing of the oxidant within 30 seconds of dose delivery in the treatment vessel.

The Biopowerplant is a system that integrates the generation of carbon-neutral energy through the cultivation and conversion of microalgal biomass, with sewage sanitation and environmental carbon recovery, with the additional and secondary production of biofertilizer, biofuel, water for reuse. This system integrates a suboptimal anaerobic digestion subsystem focused on the generation of biogas, the processing of the resulting digestate through a microalgal consortium culture subsystem with biofilm induction and smooth decreasing gradient of light radiation, and the transformation of the generated microalgal biomass into syngas through a subsystem of evaporation, torrefaction, pyrolysis, gasification, and combustion in separate chambers. The syngas and methane from the biogas are subsequently used as fuel in an electric power generator capable of operating with mixed gases. The biogas generation process is enriched through the recirculation of the microalgal biomass supernatant, the residual heat from the syngas generation subsystem, and the heat transferred from the combustion gases of the electric generator. The residual sludge from the biogas generation subsystem is recirculated towards a longitudinal biopile subsystem, where it acts as an anaerobic medium compared to the aerobic medium that constitutes the concentrated microalgal biomass, and both streams are mixed to be transformed into the syngas generation subsystem. Input inflows for system operation are mainly sewage, and optionally seawater and/or leachate. The inflows must be bioaugmented with a microalgal consortium dosed automatically by a Compact in situ bioaugmentation system, preferably more than 3 kilometers before the inflow enters the system.

Disclosed is a method for treating wastewater containing heavy metal. First, the wastewater containing heavy metal is subjected to a homogenization treatment, such that the water quality of the wastewater containing heavy metal from different processes is homogenized. The homogenized wastewater containing heavy metal is subjected to an anaerobic-aerobic circulating treatment in a membrane bioreactor (2), in which heavy metal ions are reduced by the action of microorganisms in the anaerobic treatment process. The membrane bioreactor (2) is filled with a hollow fiber membrane (3) containing a quinone group, which serves as an electron mediator that can accelerate the enzymatic reduction of heavy metal ions during the anaerobic treatment. During the aerobic treatment, the COD and SS in the wastewater are further removed.

The present invention discloses a method for starting a single-stage system for nitrogen removal coupling partial denitrification and anammox. The two nitrogen removal processes are coupled by gradually enriching denitrifying bacteria in anammox granular sludge and then activating the partial denitrification process of the functional bacteria (denitrifying bacteria). Particularly, the method comprises: inoculating anammox granular sludge in a single-stage reactor, adding an organic carbon source in gradients to enrich denitrifying bacteria and to adapt anammox bacteria, and replacing nitrites in feed with nitrates gradually to activate the partial denitrification process.