A sand filter is a common filtration system used in water treatment to effectively remove suspended solids, sediment, and impurities from water. It is essential for both municipal and industrial water purification, ensuring a reliable supply of clean and safe water for a wide range of uses.

Hoe een zandfilter werkt

Sand filtration works by passing water through several layers of specifically graded sand and gravel, which trap impurities as the water flows through. The core filtration mechanisms are as follows:

1. Mekanisk filtrering– Large particles are physically obstructed by the sand bed.

2. Adsorptie– Mindre urenheder hæfter sig til sandkornene.

3. Biologisk aktivitet– Beneficial bacteria can flourish within slow sand filters, helping to decompose organic matter.

Sand filters are frequently used alongside other treatment processes, such as coagulation, sedimentation, and disinfection, to improve water quality.

Types of sand filters used in water treatment

1. Langzame zandfilters– De werken met een lagere doorstroomsnelheid en maken gebruik van biologische processen voor zuivering, wat ze uitermate geschikt maakt voor de behandeling van drinkwater.

2. Hurtig sandfiltrering– Uses higher flow rates and requires backwashing to maintain efficiency, which is a common practice in large-scale water treatment plants.

3. Sandfiltre–封闭式单元，适用于需要高压过滤的工业及商业应用场景。

Fordele ved sandfiltre

• Cost-effective and easy to maintain

• Effektiv fjerning af suspenderet stof og turbiditet

• Geschikt voor drinkwater, afvalwater en industriële processen

• Miljøvenlig med minimal brug af kemikalier