Phosphates are important nutrients for micro-organisms and aquatic plants. However, excessively large amounts of phosphate in waters can have devastating effects on the environment.
Therefore, the limit values for permissible phosphate rates have been reduced continuously over the last couple of years. This poses a challenge to operators of sewage treatment plants because they depend more than ever before on precise, efficient and reliable metering pumps.
LEWA pumps offer the following advantages for metering of media for phosphate precipitation in water treatment:
What happens during a phosphate precipitation?
A phosphate precipitation is a physico-chemical reaction in which salts of trivalent metals are used to precipitate phosphates. Non-hazardous iron (III) and aluminium salts are applied for this purpose. Injecting metal salts creates positively charged metal ions which react with negatively charged phosphate ions. The resulting difficultly soluble metal phosphate is precipitated in form of fine floc.
The precipitant has to be injected at the right point in order for the ions to react sufficiently. Subsequently, a flocculation phase ensues during which the fine precipitation products aggregate to settleable floc.
(Source: conaqua.de)
LEWA offers customized solutions and references for almost all industries in which processes require exact metering or the reliable conveyance of fluids. As specialists in fluid handling, we of course also have experience in areas outside of our key markets.
More DetailsLEWA ecosmart is an innovative, compact and multiplexing diaphragm metering pump at a smart price. With it, we of course guarantee our renowned LEWA quality and offer you our expertise derived from 70 years in the market.
More DetailsTurnkey metering system in closed loop control with monitoring and plausibility testing equipment. Your individually configured metering system with an optimally designed pump for fluid metering in automated processes.
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