The present application relates to the field of sewage treatment, and specifically relates to a shortcut nitrification method for sewage treatment. The shortcut nitrification method for sewage treatment provided in the present application comprises the following steps: adding a shortcut nitrification accelerator to sewage. The shortcut nitrification accelerator comprises 2-30 parts by weight of an inorganic hydroxylamine and 0.1-20 parts by weight of an inorganic ammonium salt. The pH of sewage is 6.5-6.95. The shortcut nitrification method for sewage treatment provided in the present application can significantly increase nitrite accumulation rate, and control a biological nitrification reaction at a stage of nitrite accumulation, thereby facilitating a wastewater denitrification process, improving the wastewater treatment effect, and having good engineering application value.

A method of optimizing a wastewater treatment plant includes: providing an oxidation ditch having a dissolved oxygen set-point and including: an aeration system having an aerobic zone; and an anoxic zone; measuring the oxidation-reduction potential of the anoxic zone; and based on the measured oxidation-reduction potential: increasing or decreasing the dissolved oxygen set-point; increasing or decreasing a dose of supplemental nutrients; and/or increasing a dose of supplemental carbon or metal salts.

A combined waste water and gas treatment system for efficiently decarbonizing and removing nitrogen, including a water feeding pump, a carbon capture device, an intermediate water tank, and an anaerobic ammonium oxidation reactor connected in sequence through pipelines, where the carbon capture device includes an anode chamber and a cathode chamber; an anode plate is arranged in the anode chamber; a cathode plate is arranged in the cathode chamber; a gas inlet pipe is further arranged at the cathode chamber; an air compressor is connected with the gas inlet pipe; a gas outlet pipe is arranged at a top of the carbon capture device; a water outlet in the intermediate water tank is fluidly communicated with a bottom end of the anaerobic ammonium oxidation reactor through a second water inlet pipe; the gas outlet pipe is fluidly communicated with the second water inlet pipe.

A system and method of treating wastewater. In one embodiment, the system comprises a biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet, and a ballasted system fluidly connected to the fixed film effluent outlet. The ballasted system may comprise a ballast reactor tank configured to provide a ballasted effluent, and a source of ballast material fluidly connected to an inlet of the ballast reactor tank. The system may further comprise a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

Methods of treating animal organic material are disclosed herein. The methods include diluting the animal organic material to produce an organic material slurry, anaerobically digesting the organic material slurry to produce a biogas and a digestate, separating the digestate to produce a digestate solids and a filtrate, removing ammonia from the filtrate, removing organic contaminants and divalent anions from the filtrate, concentrating the filtrate to produce a retentate and a permeate, combining the digestate solids and the retentate to produce a solids product, and returning the permeate to dilute the animal organic material. Systems for treatment of animal organic material are also disclosed herein. The systems include a dilution tank, an anaerobic digester, a first solids-liquid separation subsystem, an ammonia-reducing column, a second solids-liquid separation subsystem, a production water storage tank, and a solids product 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, 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.

Water treatment method for simultaneous abatement of carbon, nitrogen and phosphorus, implemented in a sequencing batch moving bed biofilm reactor (SBMBBR) comprising carriers suitable for the development of a biofilm. The method comprises sequences of successive treatments, each treatment sequence comprising: an initial phase of anaerobic treatment, said initial phase of anaerobic treatment being followed by at least one aerobic/anoxic cycle consisting of: —an aerobic treatment phase so as to obtain an ammonium ion concentration that does not pass below a threshold concentration of ammonium ions; and a phase in which the biofilm is placed, at least locally, under anoxic conditions, this phase being concomitant with or posterior to said aerobic treatment phase; the threshold concentration of ammonium ions being calculated to allow the development of Anammox microorganisms during the phase in which the biofilm is placed, at least locally, under anoxic conditions.

A method of determining a disinfectant composition of a municipal water supply from a water sample that includes: (a) obtaining a water sample from a water source at a sampling location; (b) adding a chlorine-containing material to the water sample in the presence of an oxidation reduction potential (ORP) measurement device; (c) generating a plurality of ORP measurements during addition of the chlorine-containing material to the water sample; (d) estimating a concentration of one or more of free ammonia, fully combined ammonia, monochloramine, or a mixture of dichloroamine and trichloroamine in the water sample in which the estimation is derived from the relationship between the added chlorine material and the plurality of ORP measurements; and (e) determining a disinfectant composition of the water source at the water sampling location from the concentration calculation. A method of determining free ammonia composition is also included.

The present disclosure relates to an integrated wastewater treatment apparatus and method, the apparatus comprises a first reactor module, a second reactor module, a sedimentation module and a gas-liquid separation module, the first reactor module comprises a first reactor and an anoxic reaction zone, an aerobic reaction zone, a first gas-gathering pressurized layer, a first water inlet pipe and an aeration device; the second reactor module comprises a second reactor, a second water inlet pipe, an anaerobic reaction zone and a second gas-gathering pressurized layer; the sedimentation module comprises a third reactor and a water outlet pipe; the gas-liquid separation module comprises a gas-liquid separator, an exhaust pipe, a first riser pipe, a second riser pipe and a return pipe. The apparatus can give full play to the advantages of the autotrophic biological denitrification process, meet the biochemical treatment requirements of wastewater with low C/N ratio.

A wastewater treatment system and a wastewater treatment process, fluidly combining a one or more SBR (sequencing batch reactor) module/s, in which nitrification and denitrification of the wastewater are performed in sequences and one or more MBR (membrane bioreactor) module/s.