Solutions
LEWA supplies sturdy metering pumps that can easily be implemented in metering systems, either in new ones in the planning phase or as replacement for older pumps in existing systems. LEWA pumps are provided in a modular design that grants a high flexibility.
A wide range of material choices assures highest chemical resistance and a long lifetime of the wetted parts in every situation. The pumps are designed for long-term use and high availability, amongst others due to sandwich diaphragms which provide emergency running properties in case one of the diaphragm layers is worn. Additionally, the most important spare parts are always in stock.
Rake and grit trap
Mechanical pre-cleaning
LEWA offers solutions for:
- Suction of the settled sand(sand-water mixture) with specially coated centrifugal pumps and air-operated diaphragm pumps
Primary clarifier diaphragm pumps
Further reduction of the flow velocity,
approx. 1.5 h retention time
LEWA offers solutions for:
- Targeted addition of C-sources (e.g. isopropanol, glycerol) for phosphorus degradation with diaphragm metering pumps
LEWA ecosmart or LEWA ecodos - Tank truck unloading of C- sources with lined centrifugal pumps
Aeration tank
Nitrogen degradation
LEWA offers solutions for:
- Chemical precipitation with iron(III) chloride, metering of flocculation aids with diaphragm metering pumps LEWA ecosmart or LEWA ecodos
Fourth clarifier
For trace substances (e.g. drug residues) sand filter systems with activated carbon filter
LEWA offers solutions for:
- Backwashing of the filters with water, reuse of the filter sand with centrifugal pumps and compressed air diaphragm pumps
LEWA metering pumps convey additives in sewage plants:
Background
Sewage treatment plants are necessary to turn wastewater from households or municipalities into clean water that can be returned to the water cycle.
In such plants, there are several process steps for removing unwanted contaminants – physically, microbiologically and chemically. Depending on the composition of the various wastewater types that enter the plant, auxiliary fluids like isopropanol have to be added to keep the conditions for microbiological stability within certain limits. E.g., when the level of C-sources is too low.
Flocculants help to coagulate ingredients that microbes cannot neutralize. Those molecules may then be removed mechanically.
Industries
Pompes et systèmes de dosage pour les autres secteurs
Pour pratiquement tous les secteurs dont les processus requièrent des opérations de dosage précis ou de pompage de fluides dans des conditions d’absolue fiabilité, LEWA propose des solutions sur mesure et des références. En tant que spécialiste de la manipulation de fluides, nous avons bien entendu également de l’expérience dans des domaines qui se situent à l’écart de nos principaux marchés visés.
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Pompe doseuse à membrane LEWA ecosmart®
LEWA ecosmart est une pompe doseuse à membrane innovante, compacte et multiplex à prix avantageux. Avec cette pompe, nous garantissons la qualité renommée des pompes LEWA et vous proposons notre expertise forte de 60 années de présence sur le marché.
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Pompe doseuse à membrane mécanique LEWA ecodos®
LEWA ecodos est une pompe doseuse extrêmement fiable, économique et hautement adaptable, spécialement pour les applications ne nécessitant pas un actionnement de la membrane. Dans ce cas également, nous nous fions à notre système modulaire éprouvé pour fabriquer la pompe la mieux adaptée à vos besoins.
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