Why is a multi-disc screw press better than a belt filter press?

A multi-disc screw press offers a 90% reduction in wash water, fully automated 24/7 operation, and a non-clogging design.

Can a screw press handle oily sludge from food processing?

Yes. The multi-disc screw press is specifically designed for oily sludge. Its unique structure of fixed and moving rings creates a self-cleaning mechanism that prevents clogging.

How much can a low-temperature sludge dryer reduce sludge volume?

A low-temperature heat pump sludge dryer can reduce sludge volume by up to 80%, shrinking 4 tons of wet sludge into 1 ton of dry granules.

How does Kopay International ensure quality control?

We perform raw material verification, motor performance checks, and a 24-hour factory fatigue test before packing every order.

What is the typical power consumption of a sludge dewatering screw press?

Kopay’s multi-disc screw presses are highly energy-efficient. A model with 300kg-DS/h capacity typically consumes only 1.5kW to 2.2kW.

Why does polymer need a 3-chamber maturation system?

PAM requires 60 minutes of aging to uncoil molecular chains. A 3-chamber system ensures perfect maturation, preventing fish-eyes and saving 20% in chemical costs.

How do micro-bubbles improve Dissolved Air Flotation (DAF) performance?

DAF systems use 20-40 micron micro-bubbles to attach to suspended solids and oils, resulting in a 95%+ removal rate of Fats, Oils, and Grease (FOG).

Are Kopay wastewater systems CE and ISO certified?

Yes. Our production partners maintain ISO9001:2015 and CE certification, ensuring all equipment meets international export safety standards.

screw press dewatering polymer dosing system

Auto Polymer Preparation Unit for Accurate Dosing

Name: Automatic Polymer Preparation Unit | 3-Chamber PAM Dosing System
Brand: KOPAY ENVIRO
SKU: APDU
Price: 2000 USD
Availability: InStock

Preparing dry polymer (PAM) is a delicate process. If not mixed correctly, “fish-eyes” (undissolved clumps) form, wasting expensive chemicals and clogging downstream equipment. The Kopay Automatic Polymer Preparation Unit is a fully automated, continuous 3-tank system designed to ensure 100% maturation of flocculants, delivering a perfectly consistent solution every time.

Solving Critical Challenges in Key Applications

Inconsistent polymer preparation leads to poor sludge dewatering, high chemical bills, and operational headaches. Our unit solves this for:

Municipal Wastewater Plants: Handles variable sludge loads and polymer types with automatic adjustment. Eliminates operator dependency for 24/7 consistent cake dryness, reducing disposal costs.
Industrial Facilities (Food, Chemical, Textile): Withstands challenging polymers and high-demand cycles. Prevents costly clogging of dosing lines from poor mixing, ensuring continuous process uptime.
Sludge Dewatering Contractors & Mobile Units: Offers rapid, fool-proof setup and robust performance in varying conditions. Maximizes dewaterer throughput and cake quality at every site, protecting your profit margins.

Description | Introduction: Automatic Polymer Preparation Unit,

also know for Polymer Dosing Unit (PDU), someone like to call it: Powder Dispensing Dissolver get below

Fully automatic operation including automatic dosing, dissolving and feeding.
The highly precise dry polymer dosing device and the well-designed heater device can prevent the polymer from caking.
The dosage of dry powder and water can be adjustable, so the solution with any concentration can be prepared.
Optional: Vacuum feeding machine.
5- Optional: on-line dilution system.
Tank material: SS304 or SS316l, Polypropylene PP, FRP etc
Accept DIY customization, no MOQ limit

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Description
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Auto Polymer Preparation Unit for Accurate Dosing

Advanced 3-Chamber Polymer Dosing Technology (2026 Edition)
Stop wasting expensive chemicals due to “fish-eyes” (undissolved polymer). Our automated preparation unit ensures 100% maturation, saving you up to 20% on annual polymer costs.

[ Get a Technical Proposal via WhatsApp]

The Science of the 3-Chamber Design

Unlike simple mixing tanks, our unit utilizes three distinct chambers to respect the “aging time” required by high-molecular polymers:

Mixing Chamber: Dry powder is wetted by a high-shear vortex mixer. This prevents clumping at the very first contact with water.
Maturing (Aging) Chamber: The solution is gently stirred by a low-speed agitator. This allows the polymer chains to fully uncoil (mature) without being sheared or damaged.
Storage Chamber: The fully matured solution is held here, ready for the dosing pump to deliver it to your Multi-disc Screw Press or DAF system.

Key Technical Advantages

Significant Chemical Savings: By eliminating undissolved polymer, our units can reduce your annual chemical consumption by 20% to 30%.
Precision Dry Feeding: Features a variable-speed screw feeder with an anti-condensation heating device to ensure powder flows smoothly even in humid environments.
Full Automation (Siemens PLC): The system automatically manages water intake, powder feeding, and solution discharge. It includes low-level and no-water protection for safe, 24/7 operation.
Material Excellence: Available in high-strength Polypropylene (PP) for cost-effectiveness or Stainless Steel 304/316 for maximum industrial durability.

Model Tank Volume (L) Powder Dosing ( kg/h ) Dissolving Capacity (L/h) Control Type
KP-PDU-500 500L 0.5 - 2.5 kg/h 500 L/h Automatic PLC
KP-PDU-1000 1000L 1.0 - 5.0 kg/h 1000 L/h Automatic PLC
KP-PDU-2000 2000L 2.0 - 10.0 kg/h 2000 L/h Automatic PLC

Model	Tank Volume (L)	Powder Dosing ( kg/h )	Dissolving Capacity (L/h)	Control Type
KP-PDU-500	500L	0.5 - 2.5 kg/h	500 L/h	Automatic PLC
KP-PDU-1000	1000L	1.0 - 5.0 kg/h	1000 L/h	Automatic PLC
KP-PDU-2000	2000L	2.0 - 10.0 kg/h	2000 L/h	Automatic PLC

1.Features of our Automatic Polymer Preparation Unit | Polymer Dosing Unit:

Continuously working with 3-tank integration design (mixing tank, aging tank, storage tank), easy to operate and maintain, low total cost
Can be extended as a more automatic 2 storage tank type in accordance with the actual needs
With powdered or liquid state (optional) dual feed design to meet different needs. Proportional allocation function makes it possible to prepare liquid concentration by requirements
With uniform and moderate concentration to reduce the agglomeration causing by the improper manual allocation. Blocking of pipe or pump, unnecessary maintenance costs and powder expenses could be well avoided
Powder feeding hopper with anti-condensation, heating and insulation function can avoid the agglomeration or deterioration
When powder feeding hopper reaches the minimum stock, led light warning and automatic stop function makes overall maneuverability more perfect

2. Polymer Dosing Unit Design Sketch: | Polymer Dosing System:

3. Design Details of this automatic polymer preparation unit:

Chamber 1 (Mixing): High-shear vortex wetting for dry powder.
Chamber 2 (Maturing): Low-speed agitation for perfect molecular chain extension.
Chamber 3 (Storage): Stabilized solution ready for the [Multi-disc Screw Press].

4. Specifications of our polymer dosing system:

Model Parameter		KOPAY-500	KOPAY-1000	KOPAY-1500	KOPAY-2000	KOPAY-3000	KOPAY-4000
Solution Preparation Amount Q(L/h)		500	1000	1500	2000	3000	4000
Dimension(BLH) mm		90015001650	100016251750	100024401800	122024401800	122032002000	145032002000
Powder Conveyor Power N(KW)		0.37	0.37	0.37	0.37	0.37	0.37
Agitator	Paddle Dia φ (mm)	200	200	300	300	400	400
	Spindle Speed n (r/min)	120	120	120	120	120	120
	Power N （KW）	0.2*2	0.2*2	0.37*2	0.37*2	0.37*2	0.37*2
Dosing Screw Pump	Flow (m3/h)	0.5	1.0	1.5	2.0	3.0	4.0
	Lift(m)	10	10	10	15	15	15
	Power N(KW)	0.75	0.75	1.1	1.1	2.2	2.2
Inlet Pipe Dia DN1 (mm)		25	25	32	32	50	50
Outlet Pipe Dia DN2 (mm)		25	25	25	25	40	40

Frequently Asked Questions (FAQs)

Q: How does your system prevent polymer from caking and clogging?
A: Our patented vortex induction wetting system ensures instant, complete powder dispersion upon contact with water, while the programmed maturation agitation keeps the solution homogeneous. This dual action virtually eliminates caking, a common flaw in simple mixer tanks.
Q: Can it handle different types of polymers (cationic, anionic)?
A: Yes. The system is constructed from corrosion-resistant materials (SS316, CPVC) and features programmable recipes. You can save settings for different polymers and switch between them with one-touch, ensuring optimal preparation for each.
Q: What is the advantage over a simple “make-down” tank with a mixer?
A: The key advantage is guaranteed solution quality and consistency. Manual or basic mixer methods often create weak “fish-eyes” or over-shear the polymer, degrading its effectiveness by 30-50%. Our controlled process preserves the full molecular weight and activity of the polymer, meaning you use less chemical to achieve better dewatering results.

Integrated 3-Chamber Design for Optimal Polymer Maturation

Polymer (PAM) requires a specific aging time to reach its full flocculation potential. Our unit respects this process through a continuous three-tank flow logic:

Chamber 1: Mixing & Wetting – Dry powder is precisely fed into a high-shear vortex mixer. This ensures every granule is wetted instantly, preventing “fish-eyes” and clumping.
Chamber 2: Aging & Maturation – The solution is gently stirred by a low-speed stainless steel agitator. This allows the polymer chains to fully uncoil without being broken by high speeds.
Chamber 3: Storage & Discharge – The fully matured solution is transferred here. It provides a stable supply to your [Multi-Disc Screw Press] or [DAF System] without interrupting the preparation cycle.

KPL Series Technical Specifications

Our KPL series offers reliable, automatic flocculant preparation for various flow rates. Built with chemical-resistant materials and smart automation.

Model Number	Prep. Capacity	Tank Volume	Agitator Power	Main Material
KPL-500	500 L/h	0.5 m³	0.37 kW * 2	PP / SUS304 / 316
KPL-1000	1,000 L/h	1.0 m³	0.55 kW * 2	PP / SUS304 / 316
KPL-2000	2,000 L/h	2.0 m³	0.75 kW * 3	PP / SUS304 / 316
KPL-3000	3,000 L/h	3.0 m³	1.10 kW * 3	PP / SUS304 / 316

High-End Components for 24/7 Automation

To ensure a service life of 15+ years and minimal maintenance, we only use world-class components:

Control System: Siemens PLC with Touch Screen Interface (HMI).
Dosing Accuracy: Variable-speed screw feeder with ±1% precision.
Safety Features: Automatic low-water level protection and dry-powder blockage heating device.
Electric Parts: Schneider Electric or ABB components.

Success Case: 22% Chemical Saving for a Paper Mill

The Challenge: A paper mill in Southeast Asia was manually mixing PAM powder, leading to inconsistent sludge dewatering and high chemical waste due to “fish-eyes” in the solution.
Our Solution: Kopay International installed a KPL-2000 Automatic 3-Chamber Unit.
The Results:

ROI Achieved: The mill saved 22% on annual polymer costs, allowing the equipment to pay for itself in just 9 months.
Improved Dewatering: The consistent solution concentration resulted in a 5% drier sludge cake from their screw press.
Labor Reduction: The plant shifted from manual mixing to a fully automated process, freeing up 1 operator per shift.

“Not sure about the dosage?”
Selecting the right polymer concentration is key to ROI. Send us your wastewater flow rate, and Kopay’s engineers will provide a customized Polymer Dosing Scheme & Tank Sizing Report for free.