In a purification method for purifying contaminated water, the contaminated water contained in a purification tank is filtered by a membrane module disposed in the purification tank. An adsorption agent with powdered activated carbon is added to the purification tank at a raw side of the membrane module. The membrane module is aerated by inflow of air from below. The steps of filtering, adding, and aerating are carried out in parallel and/or sequentially. The purification method is used as a stage of a purification process of a wastewater treatment plant prior to introducing the water purified by the purification method into a river, lake or the ocean.

The present disclosure relates to recycling automotive phosphate rinse water. An apparatus and method is disclosed for treating process water containing phosphate. The apparatus may include a process water line. The process water line may be in fluid communication with a sample process water line. The sample process water line may be in fluid communication with a dilution line. The sample process water line, the dilution line, and a phosphate analyzer may be in fluid communication with a diluted process water line. The apparatus may also include a chemical additive feed line in fluid communication with the process water line downstream from the sample process water line.

The present disclosure relates to a bacterium-alga coupled sewage treatment device based on energy recycling and a use method thereof. The device comprises a pretreatment device, a photobioreactor, an alga separation apparatus, a continuous flow bioreactor and a secondary sedimentation tank which are sequentially connected in order, the pretreatment device being connected to a municipal sewage inlet pipe, the photobioreactor being connected to a carbon dioxide gas charging device through a gas filling pipeline, one part of a sludge thickening tank being connected to the secondary sedimentation tank, the other part thereof being connected to remaining sludge of the pretreatment device, carbon dioxide generated from the sludge which flows through the thickening tank and is thermally-hydrolyzed and anaerobically-acidified being connected to the photobioreactor through a gas inlet pipeline, and the alga separation apparatus being further connected to a filter press. The present disclosure has the advantages of a rational structural design, reliable and stable operation, a low operation and maintenance cost and high automaticity and intelligence, and being suitable for the use and transformation requirements of a wide range of sewage treatment plants, etc.

A system for electrohydromodulation of wastewater. In an embodiment, the system comprises an anode in contact with at least one anodic chamber and a cathode in contact with a cathodic chamber. Each anodic chamber and the cathodic chamber are configured to receive a flow of wastewater. A first multivalent cation exchange membrane, between each anodic chamber and the cathodic chamber, allows multivalent cations to pass therethrough while preventing monovalent ions to pass therethrough. A power source is electrically coupled to each anode and the cathode, and is configured to apply a voltage across wastewater in the anodic chamber and the cathodic chamber, to thereby cause multivalent cations in the wastewater to pass through the multivalent cation exchange membrane.

Separation methods and systems for converting high concentrations of animal wastes and other nutrient-rich organic materials into nutrients and other useful products such as struvite and potassium struvite. Advantageously, the system and methods do not require the addition of external chemicals other than an acid and a base.

This invention relates to a treatment method and apparatus directed to improving water quality, increasing net energy production, and reducing greenhouse gas emissions without employing bioreactor processing for waters containing suspended organic solids, PPCPs, PFAS, negative colloids, heavy metals, phosphates, nitrates, carbonates, silicates, chlorides and sodium ions. It employs SO.sub.2, sulfites and bisulfites to self-agglomerate suspended organic solids with sorbed PFAS and PPCPs, and acid leach heavy metals into solution. Subsequent liming filtration separates of metal hydroxides and insoluble calcium salts while chemically conditioning the separated organic solids for gasification or burning. The second filtrate is then exposed to ultra violet light for pathogen disinfection, and exciting sulfites to remove nitrates, and degrade PFAS and PPCPs to form a disinfected metal free salt balanced reclaimed wastewater with reduced PFAS, PPCPs, pathogens and negligible nitrogen and phosphorous.

A wastewater treatment method applicable to new or existing enhanced biological phosphorus removal (EBPR) treatment process designs which utilize the sequencing batch reactor (SBR) process activated sludge process treatment tanks. The method improves the performance and efficiency in the treatment of municipal and industrial wastewater to remove phosphorus (P) and nitrogen (N). The method includes ceasing reaction cycles when a derivative of rate of change of the input flow volume of the air stream into the tank needed to maintain a low-range of dissolved oxygen (DO), in which an oxidation reduction potential (ORP) setpoint reaches a derivative value indicating that conversion of the ammonia nitrogen in the influent wastewater content to a nitrite or to a nitrate is complete.

Various examples related to electrokinetic dewatering (EKD) of suspensions such as, e.g., phosphatic clay suspensions are provided. In one example, a system for continuous EKD includes cake dewatering unit having a lower conveying belt extending across a dewatering chamber; an upper conveying belt extending across at least a portion of the dewatering chamber; and a sludge inlet configured to supply a sludge suspension on the first end of the lower conveying belt. The conveying belts can extend across the dewatering chamber at an angle. Rotation of the conveying belts draws the sludge suspension through an electric field where the sludge suspension is dewatered. The electric field can be established between an upper anode and a lower cathode. The upper and lower conveying belts can include the anode and cathode. A suspension thickening unit can provide a thickened sludge suspension the cake dewatering unit for enhanced dewatering.

A system and method for water purification by capture of contaminants in an aqueous mixture is described herein. A system and method for regenerating the capture system is also described. An integrated capture and regeneration system and method is also described including a separation vessel that houses a capture bed and an electrode in electrical contact with the bed and a power source for applying a voltage to the electrode. The applied voltage enhances capture of the contaminant from aqueous liquid on the capture bed and modulation of the applied voltage enhances release of contaminant on the capture bed into aqueous wash liquid to regenerate the bed. The aqueous wash liquid may contain a counter ion that binds to the contaminant forming an aggregate contaminant phase that separates from the aqueous wash liquid.

A method of removing from water at least one of algae, bacteria, toxins produced by algae, toxins produced by bacteria, and algae nutrients by placing an open-cell foam material into the water, leaving the material in the water for sufficient time to adsorb/absorb at least one of algae, their toxins, and their nutrients, and then removing the open-cell foam material from the water.