Advantages and disadvantages of sludge dewatering. There are many types of Sludge Dewatering Machineand the most popular is Belt Press and Filter press. Here's the Screw Press , Decanter Centrifugal Dehydrator which are more modern models. Each type of machine has its own advantages and disadvantages. ARKto provide some information to help you choose the right product.

Principles of centrifugation - Wikipedia

The quality and price of a product is a decisive factor for investors, and quality and price vary from manufacturer to manufacturer.

Today's market includes decanters Decanter centrifuge, There are four popular types of sludge dewatering machines, including screw press, belt press and filter press. Criteria for choosing the right sludge dewatering machine, such as sludge type, sludge characteristics, sludge dewatering machine quality, suppliers, machine price ... ( More Criteria for Effective Sludge Dewatering Selection )

I. Decanter Centrifugal Dehydrator

Decanter (Decanter Centrifuge Dewatering Machine) are the most advanced sludge treatment equipment available today. It is manufactured by many brands including ARK. ARK is proud to be the only company in Vietnam with its own factory to directly manufacture decanter centrifugal dehydrators.

A decanter centrifugal dehydrator consists of a rotating platen, a rotating screw (with the same axis but different speeds), and a transmission box, The machine body is compact, but the centrifugal shaft has a very high rotational speed (3500 rpm). The device has a closed construction, which makes it easy to clean after use.

1.1. Instruments

The flocculated sludge is fed into the main body, and the solid and liquid phases are separated by centrifugal force. The whole solid is extracted by the difference in shaft rotation speed. Water and sludge are discharged as two different outputs.

Decanter Centrifugal Dehydrator Structural Diagram

1.2. Pros - Cons

Pros

• The machine has a compact structure. Saves installation space
• Large capacity
• Cleaning water

Cons:

• Installation and operating costs are quite high. Equipment consumes a lot of electricity and chemicals.
• Your device may make loud noises. Maintenance is very complex and requires a skilled team to handle the issue.

1.3. Application of Decanter Centrifuge

Decanter centrifuges are commonly used in domestic/industrial wastewater treatment systems. In particular, this device can treat livestock farm waste.

The cost depends on the volume of sludge to be treated for which you will have the appropriate capacity. The price difference between the models ranges from $10,000 to $40,000.

Ⅱ. Screw Press

Screw press (multi-disc screw press dehydrator) It is a new generation sludge dewatering machine with many outstanding features. It is suitable for different kinds of sludge and widely used in sludge treatment.

2.1. Structure of the Screw Press

Structural drawing of a screw press, type SV-RT

The main parts of a screw press consist of a screw, filter, sludge-polymer reaction tank, and body. It combines a sludge-polymer reactor with a dewatering unit and has a compact structure. The closed construction also makes the equipment durable and easy to maintain.

2.2. Instruments

The inlet sludge is concentrated and at the same time compressed for dewatering. The filter section consists of movable and fixed rings that perform the function of turning over the sludge and separating the sludge from the water. The filtered sludge is then moved and pressurized by a rotating screw where it is dried at the outlet. The liquid phase is separated by gravity between two adjacent disk gaps.

2.3. Pros and Cons

Pros

• Flocculation units (sludge-polymer reactors) are better for low consistency sludge (including viscous sludge) and can reduce sludge moisture better than other sludge dehydrators of the same capacity.
• Consume less electricity, chemicals, and cleaning water.
• It has a low noise level (less than 60 bB) and less vibration than decanter centrifugal dehydrators.

Cons:

• Suitable for small to medium-sized systems only.

2.4. Application of the Screw Press

Screw presses are used for many different types of sludge. Even for high viscosity sludges such as food processing, dairy processing, etc.

There are 3 types of screw presses: S-ST, S-RT, and SV-RT. The price of SV-RT is considered the cheapest and widely used in Vietnam. With the same capacity, the difference between the three types is from $3,500 to $10,000.

III. Belt Press

Belt Press Dewatering Machine (Belt Press) is a sludge treatment equipment that has appeared for a long time and has been trusted by many investors. The machine has a simple structure, which is easy to use and maintain. The device can change the water content of the sludge when adjusting the conveyor.

3.1. Structure of the Belt Press

Schematic of a belt press

The belt press consists of the following main parts: rotating belt, sludge squeezing roller between upper and lower belt, and machine body. The belt press is designed separately from the sludge polymer reaction tank; it has an open structure. The machine has many auxiliary devices, such as gears, high-pressure cleaning system; it also has a large size and weight.

3.2. Instruments

The flocculated sludge is fed into the space between two different belts. The belt presses the sludge with high pressure generated by multiple rollers.

3.3. Pros and Cons

Pros

• The price of the belt press is lower than other dehydrators.
• Save energy and chemicals

Cons:

• Use large amounts of water to clean
• Make a loud noise
• The filter cloth must be replaced periodically. Adjust the conveyor belt tension to ensure squeezing efficiency.

3.4. Application of Belt Press

Belt presses have been widely used for a long time. They are particularly suitable for sludge that is low in cost and not too dry. Some industries often use belt presses, such as the pulp and paper industry, household wastewater treatment systems, etc.

Belt presses are cheaper than other sludge dewatering machines. The difference between models with different capacities is about $ 7,000 - $ 10,000.

IV. Filter Press

Filter-presss (Filter Press Dewatering Machine) is a sludge treatment machine that produces high-drying sludge cake. This device saves a lot of collection and transportation costs. It has been chosen by many investors for small and medium-sized processing systems.

4.1. Structure of the filter press

The filter press consists of the following main parts: hydraulic cylinder, drip tray, plate, and frame. The Filter-press is designed separately from the Sludge-Polymer Reaction Tank and has an open structure. The machine is designed with many auxiliary devices.

4.2. Instruments

The coagulated sludge (depending on the type of sludge, which may or may not require the use of polymer) is fed into the frames and pressurized. The sludge is pumped continuously until all the frames are full. The machine stops at that time.

The sludge is dewatered with pressure from a hydraulic cylinder. The fenders move in opposite directions on a steel frame that holds the sludge. The filter press runs in batches for about 4-5 hours per batch.

4.3. Pros and Cons

Pros

• The sludge cake after pressing has a high degree of dryness, which helps reduce collection costs.
• Consume fewer coagulant chemicals.
• Quieter. Save cleaning water.

Cons:

• Not suitable for large plants with lots of sludge.
• Need workers to supervise

4.4. Application of the filter press

The filter press is a simple mechanism and is very effective for many types of sludge, including sewage sludge from textile and dyeing production, steel production, etc. However, it is not suitable for large volumes of sludge due to limited batch operations. mud.

The average price of a filter press is between $5,000 and $10,000. .

For advice, selection, and quotation of a suitable sludge dewatering machine, investors should pay attention to the following points.

• Sludge type (e.g. septic tank, industrial/domestic sewage sludge, water treatment system, paper production...)
• Sludge characteristics (flow rate, sludge concentration)
• Processing time per day (e.g., 8 hours for administrative units, 24/24 hours for industrial private units...)
• Price matches quality
• Luxury Sludge Dewatering Machine Supplier
• After-sales service. Guaranteed promises
• When an incident occurs, you need your vendor to arrive on time. Make repairs and fixes quickly.

Today, many brands offer the above types of sludge dewatering machines. However, ARK is the only factory that can produce all kinds of sludge dewatering machines at favorable prices.

ARK Co., Ltd - Β Reputable sludge dehydrator suppliers

30 years of experience

With 30 years of experience in Korea and 10 years in Vietnam, ARK is always aiming for sustainable value with our customers.

Modern production lines

Our production lines follow the most modern technology in Korea, imported directly from the USA, UK and South Korea. Confirms ISO 9001:2015 standard.

Experienced staff

ARK has a team of highly qualified engineers with many years of experience. The skilled workers always try their best to provide the best products.

International and domestic distribution

ARK's sludge dewatering machines are recognized not only in Korea and Vietnam, but also abroad. ARK's reliability is proven by positive customer reviews.

Our commitment

ARK is committed to providing you with 100% new products, which are produced directly in Vietnam according to Korean technology. We are always ready to provide machines and support on time. In addition, every customer wants to use ARK's sludge dewatering machine honestly and see the economic benefits. We offer test run service for all types of sludge.

Contact us today for an enthusiastic and responsive consultant.

[block id=”footer-post”]