Industrial decanter centrifuge for sewage treatment

Industrial Treatment Plant Sludges: Municipal and industrial wastewater treatment plants are designed to produce a clean, safe water discharge within the required limits. The complexity of the plant will depend on the immediate environmental considerations and the consent limits negotiated with the authorities. New plants built today are becoming more and more sophisticated and decanter centrifuge is extensively used for liquid-solid separation, sludge dewatering, and sludge thickening applications.

Decanter centrifuge

For the purposes of this overview on typical Decanter Centrifuge applications, we will consider only the basics. There are basically (2) two decanter centrifuge applications in the municipal and industrial wastewater treatment facilities and wastewater treatment industry:

The first is to feed to the decanter centrifuge liquid slurry (around 1 – 3 % dws.) and thicken it to approximately 8% dws, often prior to feeding the thickened material to a biological digester.
The second is to feed the decanter with similar slurry and dewater the solids to a relatively dry stackable cake of leach free solids prior to transportation or disposal. In the second case the solids can come from the primary clarifier or the secondary clarifier after biological treatment.

A simplified and typical flow-chart for wastewater applications is shown below although not all process steps are present, particularly for industrial wastewater.
The range of decanter centrifuges is ideally designed for these applications. Controlling the decanter centrifuge operating parameters optimizes the consistency of the discharged sludge.

Sludge discharge consistency can be regulated to suit the disposal requirements. Slurry for land application should be thickened to reduce the volume of water but still needs to be fluid enough to be easily spread or evenly pumped for land application. Digester feed slurry can often be thicker but typically requires a pump-able sludge. When the discharged sludge will be disposed of via landfill, dewatering the feed slurry to a stackable consistency reduces weight, volume and disposal costs.、

Besides, in whole drilling mud solids control system, decanter centrifuge also plays an important role. Decanter Centrifuge is used to separate suspended solids ≥2μm in diameter and treat the drilling mud and fluids. It is especially effective when used in oilfield service industry, industrial service industry and especially in environmentally sensitive areas. This type of centrifuge is high in recovery rate, effective in solids control and remarkable in the reduction of cost spent on drilling mud resupplying and management. It is a very sophiscated dynamic balancing machine, able to operate stably with the whirling speed ranging from 0 to 3900 and generate centrifugal force of 3000G.

As the China solids control leader and drilling waste management expert, KOSUN provides all the drilling solids control equipment for the drilling fluid circulation system, all the products can be manufactured on the requirements of the customers. KOSUN Drilling Shale Shaker and Decanter Centrifuge are the hot products, they are applied to the oilfield in many countries and also win much praise from the customers all over the world.