Water treatment

species of a fast-growing, drought-resistant tree and listed as an invasive species in several countries

thumb|312x312px|Reverse osmosis desalination plant in Barcelona, Spain

chemical reaction

chemical compound

chemical compound

when water demand exceeds available resources

upright|thumb|150px|Schematic of size-based membrane exclusion

thumb|4x speed video of floc settling after adding flocculant polymers during a jar test.

method for the separation of mixtures in process engineering

process that makes water more acceptable for a specific end-use

addition of fluoride to a water supply to reduce tooth decay

soft diatomite variety

Monochloramine, often called chloramine, is the chemical compound with the formula NH2Cl. Together with dichloramine (NHCl2) and nitrogen trichloride (NCl3), it is one of the three chloramines of ammonia. It is a colorless liquid at its melting point of , but it is usually handled as a dilute aqueous solution, in which form it is sometimes used as a disinfectant. Chloramine is too unstable to have its boiling point measured.

Ultrafiltration (UF) is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the membrane in the permeate (filtrate). This separation process is used in industry and research for purifying and concentrating macromolecular (103–106 Da) solutions, especially protein solutions.

chorination of water

process of converting wastewater into water that can be reused for other purposes

portable water purification powered by sunlight

chemical compound

thumb|Process diagram nanofiltration Nanofiltration is a membrane filtration process that uses nanometer sized pores through which particles smaller than about 1–10 nanometers pass through the membrane. Nanofiltration membranes have pore sizes of about 1–10 nanometers, smaller than those used in microfiltration and ultrafiltration, but a slightly bigger than those in reverse osmosis. Membranes used are predominantly polymer thin films. It is used to soften, disinfect, and remove impurities from water, and to purify or separate chemicals such as pharmaceuticals.

combination of a membrane process with a biological wastewater treatment process

unproven method of supposedly reducing the effects of hard water

physical water treatment process using gravity to remove suspended solids from water

flood control measure

EDTMP or ethylenediamine tetra(methylene phosphonic acid) is a phosphonic acid. It has chelating and anti corrosion properties. EDTMP is the phosphonate analog of EDTA. It is classified as a nitrogenous organic polyphosphonic acid. __TOC__

thumb|Fouling on a heat exchanger in a steam [[power plant]] thumb|Condenser (steam turbine)|Condenser tube with residues of [[biofouling (cut open)]]

structure using sedimentation to remove matter from wastewater

gluey polymers secreted by microorganisms to form biofilms

water purified to uncommonly stringent specifications

ponds designed and built for wastewater treatment

chemical treatment procedures

distils water with substances dissolved in it by using the heat of the Sun to evaporate water so that it may be cooled and collected, thereby purifying it

agent used to remove suspended solids from liquids

process of maintaining a clean swimming pool

chemical compound

firefighting term

in aquariums or fish farms

flotation

Electrodeionization (EDI) is a water treatment technology that utilizes DC power, ion exchange membranes, and ion exchange resin to deionize water, thereby removing trace minerals that function as anions and cations. By itself, it does not remove other contaminants, including pathogens, organic compounds, or dissolved gases. EDI is typically employed as a polishing treatment following reverse osmosis (RO), and is used in the production of ultrapure water. It differs from other RO polishing methods, like chemically regenerated mixed beds, by operating continuously without chemical regeneration.

self-contained, easily transported units used to purify water from untreated sources

desalination technique powered by solar energy

water safety directive

Hungarian drinking water standards

water filtration device

informal term for the white solid that results from the addition of soap to hard water

largest polyacrylamide manufacturer in the world

biological process for wastewater treatment

in water treatment, addition of compounds that promote the clumping of fine floc into larger floc so that they can be more easily separated from the water

Rhizofiltration is a form of phytoremediation that involves filtering contaminated groundwater, surface water and wastewater through a mass of roots to remove toxic substances or excess nutrients. thumb|right|Studying plant roots

Polydiallyldimethylammonium chloride (shortened polyDADMAC or polyDDA), also commonly polyquaternium-6, is a homopolymer of diallyldimethylammonium chloride (DADMAC). The molecular weight of polyDADMAC is typically in the range of hundreds of thousands of grams per mole, and even up to a million for some products. PolyDADMAC is usually delivered as a liquid concentrate having a solids level in the range of 10 to 50%. It is a high charge density cationic polymer. The charge density makes it well suited for flocculation. Actually, pDADMAC or DMDAAC, is used as a coagulant - a charge neutralizati

technology to deionize water

policy-making processes and legislation that affect water resources

Procedures used to analyze water quality

filtration systems that use a moving belt to separate solids from liquids