An anionic flocculant including: galactomannan; and a polysaccharide other than the galactomannan, wherein the anionic flocculant has a bulk density of 0.50 g/cm.sup.3 or more but 1.00 g/cm.sup.3 or less, the anionic flocculant has a particle diameter D.sub.50 of 250 μm or more but 850 μm or less, and the anionic flocculant has a particle diameter D.sub.10 of 150 μm or more.

The present disclosure provides compositions and methods of use for effectively treating aquarium water in long term. The compositions include various components functioning to improve water quality, reduce or remove inorganic nitrogen and phosphorus, stabilize buffer capacity, and provide other advantages to aquarium water. Methods of using the compositions to improve the efficiency of treating aquarium water are also provided. The compositions and methods of the present disclosure can improve prophylaxis against unfavorable aquatic plant such as algae and extend life of animals in aquarium water.

A water treatment agent containing (a) an inorganic flocculating agent, (b) a polymeric flocculating agent, and (c) a non-swellable aluminosilicate compound with a volume swelling ratio of 120% or less is described. The volume swelling ratio of the component (c) is determined by the following formula: volume swelling ratio (%)=(L1/L2)×100, where L1 represents a volume of the component (c) 24 hours after adding 0.5 g of the component (c) to 50 ml of ion exchange water at 25° C., and L2 represents an apparent volume of 0.5 g of the component (c) in the air.

A method for remediating wastewater formed by water and per- and poly-fluoroalkyl substances (PFAS) using a wastewater treatment system that includes a collecting unit, a dewatering unit, a drying unit, and a baking unit. Wastewater provided to the collecting unit is dosed by adding a compound to the wastewater in an amount that is sufficient to cause the PFAS to separate from the water and to form a sludge. The sludge is dewatered with the dewatering from a first dryness level a second dryness level. The dewatered sludge is then dried in the drying unit from the first dryness level to a third dryness level. The dried sludge is then baked at a sufficiently high enough temperature that chemical bonds of at least a portion of the PFAS is destroyed.

Provided is a water-purifying agent formed of a granulated product including a mixture of a plant powder and a polymeric flocculant, wherein a surface of the granulated product includes a coated portion in which the plant powder is coated with the polymeric flocculant and a non-coated portion in which the plant powder is not coated with the polymeric flocculant.

A treatment system for removing dissolved organic compounds from wastewater, which comprises a water-soluble cationic polymer, and wood-based organic material having an average particle size <10 mm. The invention relates also use of said treatment system for COD removal in the treatment of wastewaters, and a method for removing dissolved organic compounds from wastewater.

A method and apparatus are provided for removing EPA regulated chemical species from industrial wastewater using green rust. The apparatus includes a green rust generator having an iron anode and a carbon cathode.

The disclosure relates to a microbial cellular biomass having flocculant properties, to its obtaining process and to its use in the treatment by flocculation.

The invention discloses and claims various methods for the treatment of various wastewater streams of varying chemical composition using sonication in combination with a variety of other methods, including nucleation, ozonation, flocculation, clarification, adsorption, polishing, and filtration. The methods disclosed and claimed are useful in the treatment of industrial wastewater, brackish water, seawater, and for the treatment of oil and gas-well water as well as wastewater from hydraulic gas-fracturing processes for the production of oil and natural gas.

The present invention relates to a solid precipitation apparatus and a solid precipitation process, wherein said apparatus and said process, particularly when used for the desalination of a high-salinity wastewater, can meet the requirement of stable operation for a long period, can realize efficient removal of salts from the wastewater, and solve the problems of difficult desalination of high-salinity wastewater, easy blockage, and the like. The solid precipitation apparatus comprises a housing, an inlet for a stream, a discharging outlet, and a support disposed in an inner chamber of said housing, wherein the configuration of said support is suitable for a solid substance to be deposited and loaded thereon.