Textile & Dyeing: Wastewater Solutions
Handle Fibers. Reduce Sludge. Reuse Water.
Complete separation systems engineered for Printing, Dyeing, and Finishing mills.
At Loway Equipment, we understand that textile wastewater is complex. It contains not just chemical dyes, but also difficult physical contaminants like cotton lint, wool fibers, and grease.
We don’t just sell you a press; we solve the whole flow. From Screening Fibers at the inlet to Dewatering Hazardous Sludge at the outlet, we help you achieve compliance and lower disposal costs.
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The Core Challenge: More Than Just Color
- Fiber Clogging: Long fibers wrap around shafts and clog pumps. They must be removed first.
- Hazardous Sludge: Dye sludge is often classified as hazardous waste. High moisture = High disposal bills.
- Complex Sludge Mix: Mills produce both Chemical Sludge (from color removal) and Biological Sludge (from aeration). One machine may not fit both.
The Loway Solution: Step-by-Step
We deploy the right technology for each stage of your treatment plant (WWTP).
- Step 1: Fiber Removal (Headworks)
- The Problem: Fiers clogging downstream pumps.
- Our Solution: Rotary Drum Screen / Fine Bar Screen.
- Outcome: Intercepts lint and threads >1mm, protecting your presses and pumps.
- Step 2: Chemical Sludge (Color Removal)
- The Problem: Large volumes of watery sludge from coagulation (Alum/Iron).
- Our Solution: High-Pressure Filter Press.
- Outcome: Squeezes sludge to 40-50% Dry Solids. This extreme dryness (compared to 20% from a belt press) cuts your hazardous waste hauling bill in half.
- Step 3: Biological Sludge (Secondary Treatment)
- The Problem: Sticky bacterial sludge that needs 24/7 dewatering.
- Our Solution: Multi-Disc Screw Press.
- Outcome: Runs continuously with low energy and no odor. Note: Requires effective fiber screening upstream.
Membrane Filter Press
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Best For: Chemical Sludge (Color Removal)
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Cake Dryness: Highest (45% DS). Key for cost reduction.
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Fiber Tolerance: Good. Fibers help form cake.
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Water Usage: Very Low.
Screw Press
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Best For: Biological Sludge (Activated Sludge)
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Cake Dryness: Moderate (20% DS). Continuous operation.
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Fiber Tolerance: Low. Requires pre-screening.
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Water Usage: Low.
Membrane Filter Press
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Best For: Mixed Sludge (Large Volume)
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Cake Dryness: Low (18% DS). Often too wet for landfill.
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Fiber Tolerance: Poor. Fibers blind the belt mesh.
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Water Usage: High
Key Applications
Application | The Challenge | The Loway Solution |
Dyeing & Printing | High-volume chemical sludge from coagulation/flocculation. | Chamber Filter Press. Produces a rock-hard cake for easy disposal. |
Wool Scouring | High grease (Lanolin) and dirt content. | Heated Filter Press. Hot plates help separate grease and solids efficiently. |
Denim / Indigo | Heavy sludge load with high settling speed. | Membrane Press. Squeezes indigo sludge to maximum dryness for recovery. |
ZLD Pre-treatment | Protecting RO membranes from suspended solids. | Precision Filtration. Ensures filtrate SDI < 3 for safe Water Reuse. |
At Loway Equipment, we’re committed to helping you optimize your processes with reliable and efficient filter press solutions.
Contact us today to learn more about how our filter presses can help improve your operations’ efficiency, productivity, and sustainability.
The Manufacturer Advantage: Built for Corrosion
Dye houses are corrosive. We build to last.
- Epoxy Protection: 3-layer anti-corrosion paint for acid/alkali vapors.
- Polypropylene Plates: Chemically inert to pH 2-13.
- Turnkey Skids: We supply the full skid: Press + Feed Pump + Polymer Dosing.
FAQ: Textile Dewatering
Have More Questions? Our technical team is ready to provide detailed, personalized guidance.
Q1: Fibers clog our belt press. What should we do?
Switch to a Filter Press (where fibers actually assist filtration) or install a Rotary Drum Screen before the sludge tank to remove fibers early.
Q2: Can you handle high pH (Mercerizing) wastewater?
Yes. Our Polypropylene (PP) plates and specialized EPDM gaskets are designed to withstand high alkalinity (pH 12+) without degrading.
Q3: What is the ROI for switching to a Filter Press?
If you are paying high fees for hazardous waste disposal, switching from a Belt Press (20% dryness) to a Filter Press (45% dryness) reduces waste weight by >50%. The ROI is typically less than 18 months.
Q4: Does the Filter Press require more polymer (flocculant) than a Belt Press?
No, typically less. Because the Filter Press relies on high pressure (static) rather than gravity drainage (dynamic), it can often form a cake with lower polymer dosage. In some chemical sludge applications (like Lime/Iron sludge), it can even operate without polymer, purely relying on the chemical precipitate itself.
Q5: Our plant space is limited. Which machine has the smallest footprint?
The Multi-Disc Screw Press has the smallest footprint and can be easily stacked or skid-mounted. However, if your priority is cake dryness, a Filter Press can be installed on an elevated platform (mezzanine), allowing the space underneath to be used for cake bins or other equipment.
Q6: How long do the filter cloths last with dye sludge?
Dye sludge can be sticky. With proper washing, cloths typically last 6-10 months. We recommend Satin-Weave or Monofilament cloths for textile applications because they release the sticky cake much easier than standard felt cloths, reducing manual cleaning time.
Loway Equipment Applications Across Industries
We are proud to have worked with clients from diverse industries, providing tailored filtration solutions that improve efficiency, reduce costs, and enhance operational performance.
