A water processing system provides prevention of scale formation in both interrupted and recirculating flow operations. The system includes an inlet for receiving an inlet water flow, a magnetizing chamber, and an outlet for providing an outlet water flow. The magnetizing chamber is included in a device that has at least one permanent rod/bar magnet at least partially disposed within the water flow. The magnet has an axis extending between the poles thereof in a direction perpendicular to the flow, so that the magnetizing chamber exerts a magnetic force on scale suspended within the inlet water flow, and so that the suspended scale remains in suspension in the outlet water flow.

Various embodiments relate to methods and systems for removing phosphorus and/or nitrogen from water. A method of removing phosphorus and nitrogen from water includes passing starting material water including nitrogen and phosphorus through an elevated pH phosphorus removal stage. The method includes passing the water through an electrolytic nitrogen removal stage. The method includes passing the water through a galvanic phosphorus removal stage. The water produced by the method has a lower phosphorus concentration and a lower nitrogen concentration than the starting material water.

A filter for a water-purification device includes a filter housing having a water inlet and a water outlet defined therein, and a filter member disposed in the filter housing to purify water introduced through the inlet and supply the purified water to the outlet. The filter member includes a carbon block produced by mixing 40 to 50% by weight of titanium oxide, 30 to 40% by weight of activated carbon, and 18 to 23% by weight of binder with each other.

The present disclosure relates to methods and systems for treating a fluid produced from a biorefinery to remove contaminants, such as metals and sulfur therefrom. Biomass is pyrolysed and activated to form activated carbon used to remove such contaminants. The fluid produced from the biorefinery may be one or more of a biofuel, a biogas, and wastewater.

The disclosure relates to devices and systems for configurable, contaminant-specific water filtration and treatment under pressure. In particular, the disclosure relates to a contaminant-specific configurable and modular water filter and a water filtration system maintained under positive or negative pressure, comprising modular housings, each housing defining a plurality of reconfigurable compartments operable to accommodate contaminant-specific filtering units in an order configured to minimize pressure drop along the flow direction of the water.

A dendrimeric carbon dot-polyamide membrane, a method for making the dendrimeric carbon dot-polyamide membrane, and a method for producing purified water are provided. An exemplary carbon dot-polyamide membrane includes polyamidoamine dendrimeric carbon dots and a polyamide membrane. The polyamidoamine dendrimeric dots are dispersed throughout the polyamide membrane.

A multi-functional lead anti-dissolution composition based on 100 parts by weight consisting of: a succinic acid in an amount of from 30 to 70 percent by weight; and a tartaric acid in an amount of from 70 to 30 percent by weight. The composition does not include any phosphates, thereby not contributing to the phosphate footprint in the water supply. The composition includes organic acids that have anti-inflammatory properties in addition to reducing lead dissolution in drinking water.

Fresh water contamination by heavy metals results from a variety of sources and can be damaging to wildlife, alter landscapes, and impact human health. metals removal form water sources is desirable for improving water quality and preventing adverse effects, but also for metals collection and recycling. Adsorption is a desirable metals extraction technique due to economic feasibility. Nanoscale materials exhibit high surface-area-to-volume ratio that lends to high adsorption and reactivity, making them ideal candidates for adsorptive metals extraction processes. Despite these properties, nanomaterials have elicited safety concerns. The extraordinarily small dimensions of these materials allow them to maneuver biological systems, tissues, and even cells, and combined with high reactivity, this translocation can result in toxic effects. It is therefore imperative that safety of nanomaterials for metals extraction be evaluated in addition to adsorptive properties. The current invention describes nanoparticles composed of magnetite, coated in hydroxyapatite, and functionalized for adsorption with titanium dioxide (TiHAMNPs). This material is safe, provides significant adsorption of metals, and allows efficient collection in magnetic systems.

A chelator having formula I or a salt thereof removing metal ions from a solution is provided:

##STR00001## wherein X.sub.1 is N or P; and n is 1 or 2. Protein-chelator systems for removing metal ions from a solution are also provided.

An improved method for removing contaminants, such as 1,4 dioxane, from ground water using an advance oxidation process. The improved method uses a controlled injection of monochloramine into the effluent in an amount that suppresses formation of bromates but does not interfere with the oxidative destruction of 1,4 Dioxane destruction. Removing iron from the effluent with a sand filter further improves the removal of bromates from the treated water.