A total biological count associated with treated water produced by a wastewater treatment system may be monitored online in a decentralized non-potable water system. Preventative and/or corrective action can be taken in response to a deviation from a predetermined threshold level.

A method and rainwater processing system are disclosed. According to one aspect, a method includes collecting rainwater, filtering the collected rainwater, and ozonating the filtered collected rainwater to produce potable water. The method includes preparing a functional water, the preparing including adding a salt concentrate to at least a portion of the potable water within a processing tank to create a mixture.

A method of producing treated ion exchange resin material includes exposing an enclosed vessel containing ion exchange resin and a pre-treatment solution to high energy radiation. The treated ion exchange resin material has reduced organic impurities or total organic carbon (TOC).

A system and method are disclosed which significantly improves the control of conductivity, concentration of free residual chlorine, basin level, and pH in forced-draft open recirculating cooling towers, with a basin capacity of 750,000 gallons of water or more. Conductivity, free residual chlorine, basin level, and pH are each controlled by a programmable PID controller operating in a sampled-data environment where the set point is a continuously updated rate-of-change set value for conductivity, free residual chlorine, basin level, and pH based on a near-time prior manipulated value. Programmable PID controller outputs to each control element a manipulated value to bring the rate-of-change of the process value equal to the rate-of-change of the set value.

A preparation method and use of a modified hydroxyethyl cellulose scale inhibitor for inhibiting silica scale are provided. The scale inhibitor is prepared by grafting reaction with hydroxyethyl cellulose as a raw material, ammonium persulfate as an initiator and N-(3-dimethylaminopropyl) methyl acrylamide as a graft monomer. The grafting reaction can introduce grafting chains containing amide group and tertiary amine group into a cellulose molecular chain, so that it can effectively disperse scale forming substances and obtain the efficient environment-friendly scale inhibitor. The scale inhibitor can effectively inhibit the generation of silica scale and prevent the increase of scale particle size, the scale inhibitor is used in a reverse osmosis system, which can effectively alleviate the decline of the membrane flux. The scale inhibitor has a good application prospect in controlling the silica scale on the surface of the reverse osmosis membrane.

An electrochlorination system includes an electrolyzer fluidically connectable between a source of feed fluid and a product fluid outlet, and a sub-system configured to one of increase a pH of the feed fluid, or increase a ratio of monovalent to divalent ions in the feed fluid, upstream of the electrolyzer.

The present invention relates to a process for forming or obtaining vivianite in or from a phosphorus-containing waterbody, sediment and/or sludge, to an apparatus for obtaining vivianite from a phosphorus-containing waterbody, sediment and/or sludge, and to the use of a composition comprising at least one alkaline earth metal peroxide and a magnetic separating apparatus for obtaining vivianite from a phosphorus-containing waterbody, sediment and/or sludge.

A biocide-generating device including a housing having an inlet and an outlet. The biocide-generating device additionally including a strainer basket that mounts within an interior of the housing including parallel electrode plates positioned within an interior of the strainer basket. The biocide generating device additionally including a protective dielectric sleeve in which the electrode plates are received. The protective dielectric sleeve is positioned between the electrode plates and the strainer basket.

An ion-exchange apparatus has a raw-water tank 1, a treatment tank 2, an ion exchanger 3 and a voltage applying device E. The raw-water tank 1 contains a to be treated liquid that has impurity ions. The treatment tank 2 contains a treatment material with exchange ions exchangeable with the impurity ions. The ion exchanger 3 enables the passage of the impurity ions from the raw-water tank 1 to the treatment tank 2 and the passage of the exchange ions from the treatment tank 2 to the raw-water tank 1. The voltage-applying device E applies a voltage to the ion exchanger 3.

A solid, non-phosphorus water treatment composition can be used for cooling water treatment applications. The composition can include a polycarboxylic acid, a polymeric dispersant, a soluble corrosion inhibitor, and a fluorescent tracer. The composition can define a solid that is devoid of phosphorus and has a pH effective such that, when the composition is dissolved in water at a concentration of 2 weight percent to form a solution, the solution has a pH within a range from 1 to 5.