The present invention provides a method of treating wastewater in a wastewater system. The wastewater system comprises a treatment plant comprising a treatment space and a sewer system comprising a sewer space. The treatment plant further comprises a treatment inlet for supplying wastewater to the treatment system from the sewer system. The method comprises the step of: providing a treatment parameter being significant for purification of wastewater in the treatment plant, determining an actual spare plant capacity indicating an amount of wastewater which can be supplied to the treatment space, and determining an actual spare wastewater storage volume indicating an amount of wastewater which can be retained in the sewer space. The amount of wastewater supplied through the treatment inlet to the treatment plant is varied based on the treatment parameter, the actual spare plant capacity, and the actual spare wastewater storage volume.

A data-knowledge driven multi-objective optimal control method for municipal wastewater treatment process belongs to the field of wastewater treatment. To balance the energy consumption and effluent quality, a data driven multi-objective optimization model, including energy consumption model and effluent quality model are established to obtain the nonlinear relationship along energy consumption, effluent quality and manipulated variables. Meanwhile, a multi-objective particle swarm optimization algorithm, based on evolutionary knowledge, is proposed to optimize the set-points of nitrate nitrogen and dissolved oxygen. Moreover, the proportional integral differential (PID) controller is designed to track the set-points. Then the effluent quality can be improved and the energy consumption can be reduced.

An advanced nitrogen removal method using partial nitrification-denitrification coupled two-stage autotrophic denitrification. Sewage is introduced into a first pool for partial nitrification-denitrification treatment, and then introduced into a first regulating reservoir. Dissolved oxygen content in the first pool is kept at 0.4-0.6 mg/L. Water is discharged when a molar ratio of nitrite nitrogen to ammonia nitrogen in the first regulating reservoir is 1.0-1.3:1. Effluent in the regulating reservoir is introduced into a second pool for anaerobic ammonia oxidation treatment, and then introduced into a second regulating reservoir. In the second pool, pH is 7.0-7.4, a temperature is 22-28° C. Effluent in the second regulating reservoir and sulfides are introduced into a third pool for denitrification treatment. Water is discharged. In the third pool, pH is 7.5-8.0, a temperature is 28-32° C., a mass ratio of sulfur to nitrogen is 1.9-2.0:1.

A method for treating a sludge derived from sewage or wastewater, the method comprising subjecting the sludge to a treatment step at a pH of 8.9 or greater and a free ammonia (FA) content of 100 mg NH.sub.3—N/L or greater. The treated sludge may be fed to a bioreactor to produce methane.

This invention relates to apparatus, methods and applications for treating wastewater, and more particularly to a technique of biological processes that integrates lowering the levels of effluent pollutants and reducing accumulated sludge volume from wastewater. This invention further relates to apparatus and methods for using a blend of non-pathogenic microbes, spores, unicellular organisms, and enzymes on-site at a wastewater treatment facility to rapidly, ecologically, and cost-effectively solve numerous contaminant issues common in wastewater.

A method for predicting a discharge level of an effluent from decentralized sewage treatment facilities, the method including: measuring the conductivity of an influent, the conductivity and suspended solids concentration of an effluent of a plurality of decentralized sewage treatment facilities; repeatedly measuring a pH, a concentration of COD, a concentration of ammonia nitrogen, the concentration of total phosphorus of the effluent of each of the plurality of decentralized sewage treatment facilities; calculating average values of the pH, the concentration of COD, the concentration of ammonia nitrogen, the concentration of total phosphorus; comparing the average values with a local sewage discharge standard, and determining a discharge level of the effluent; constructing a predictive model; and sampling an influent and an effluent of a sewage treatment facility, measuring the conductivity of an influent, the conductivity and suspended solids concentration of the effluent, inputting the obtained data to the predictive model.

A method of treating a landfill leachate containing ammoniacal nitrogen and phosphate by mixing with seawater to precipitate magnesium ammonium phosphate (MAP) also known as struvite. Effects of pH, temperature, stirring speed, and magnesium to ammonia molar ratio on leachate properties such as COD, ammoniacal nitrogen, phosphate content, color, turbidity, amount of magnesium, iron and zinc are disclosed. The method provides high removal efficiency for removal of ammoniacal nitrogen, phosphate, COD, color and turbidity. The method provides a cost-effective system for treatment of landfill leachate and recovery of MAP.

In a cooperative optimal control system, firstly, two-level models are established to capture the dynamic features of different time-scale performance indices. Secondly, a data-driven assisted model based cooperative optimization algorithm is developed to optimize the two-level models, so that the optimal set-points of dissolved oxygen and nitrate nitrogen can be acquired. Thirdly, a predictive control strategy is designed to trace the obtained optimal set-points of dissolved oxygen and nitrate nitrogen. This proposed cooperative optimal control system can effectively deal with the difficulties of formulating the dynamic features and acquiring the optimal set-points.

The invention is in the field of organic sludge digestion from various sources, such as manure, sludge from a wastewater treatment plant, and an organic fraction of dredging sludge. The present method provides advanced control for serially treating aqueous organic sludge by anaerobic digestion. It further relates to dewatering of the obtained biomass.

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.