Wastewater Treatment & Sludge Dewatering: Top 20 Technical FAQs

1. 왜 a는 멀티 디스크 스크류 프레스 벨트 필터 프레스보다 나은가요?

A multi-disc screw press offers significant advantages over a belt filter press, including a 90% reduction in wash water consumption, fully automated 24/7 operation, and a non-clogging design. Unlike belt presses, screw presses handle oily sludge effectively and operate at low speeds (2-4 RPM), resulting in much lower noise and power consumption.

2. 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 the filter gaps from “blinding” or clogging, which is a common failure point for centrifuges and belt presses in the food and dairy industries.

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

Kopay’s multi-disc screw presses are highly energy-efficient. For example, a model with a 300kg-DS/h capacity typically consumes only 1.5kW to 2.2kW, which is significantly lower than the 15kW+ required by high-speed decanter centrifuges.

4. How much can a low-temperature 슬러지 건조기 슬러지 부피를 줄이는 방법은 무엇일까요?

A low-temperature heat pump sludge dryer can reduce sludge volume by up to 80%. It typically takes wet sludge with 80% moisture content and dries it down to 10%–30% moisture, drastically reducing transportation and landfill disposal costs.

5. Is low-temperature sludge drying safe for hazardous waste?

Yes. Kopay sludge dryers operate at temperatures below 75°C (167°F). This low-temperature range ensures there is no risk of dust explosion or the release of toxic gases, making it the safest method for drying chemical and pharmaceutical sludge.

6. 다음 두 가지의 차이점은 무엇입니까? polymer preparation unit and a dosing skid?

An Automatic Polymer Preparation Unit (3-chamber) is used to dissolve dry powder into a liquid solution through a timed maturation process. A PE Dosing Skid is a delivery system used to pump ready-made liquid chemicals (like acids or coagulants) directly into the wastewater stream.

7. Why does polymer need a 3-chamber maturation system?

High-molecular polymers (PAM) require approximately 60 minutes of aging time to fully uncoil their molecular chains. A 3-chamber system ensures that the polymer is correctly mixed, matured, and stored, preventing “fish-eyes” and reducing chemical waste by up to 20%.

8. 미세 기포는 어떻게 개선 효과를 가져오나요? Dissolved Air Flotation (DAF) 성능?

DAF systems rely on micro-bubbles (typically 20–40 microns) to attach to suspended solids and oils. Smaller, more stable bubbles provide a higher surface area for attachment, resulting in a 95%+ removal rate of Fats, Oils, and Grease (FOG) and Total Suspended Solids (TSS).

9. What material is best for wastewater equipment: SUS304 or SUS316?

While SUS304 stainless steel is the standard for most municipal wastewater applications, SUS316/316L is recommended for high-chloride environments, saline wastewater (like aquaculture), or highly acidic industrial effluents due to its superior corrosion resistance.

10. How often do the wear parts in a screw press need to be replaced?

The primary wear parts in a screw press are the screw shaft coating and the moving rings. Under standard operating conditions, Kopay’s high-strength components typically last 15,000 to 30,000 operating hours before requiring maintenance.

11. 철근 간격은 얼마여야 합니까? 기계식 미세 스크린?

For the protection of downstream MBR systems or high-speed pumps, a bar spacing of 1mm to 3mm is recommended. For general primary treatment, 5mm to 6mm is the industry standard.

12. 할 수 있나요? rotary drum filter replace a traditional bar screen?

Yes, in specific applications like paper mills or fish farming, a rotary drum filter is superior because it can capture much finer particles (down to 20 microns) compared to the 1mm–6mm limit of most mechanical bar screens.

13. How does a shaftless screw conveyor handle sticky sludge?

샤프트리스 스크류 컨베이어는 중앙 파이프가 없어 이물질이 끼거나 쌓이는 것을 방지합니다. 따라서 컨베이어는 수분 함량이 높은 점착성 슬러지 케이크를 막힘 없이 더 가파른 각도로 이송할 수 있습니다.

14. What is the benefit of a PLC-controlled dosing system?

A PLC-controlled system (like Siemens or Schneider) allows for flow-proportional dosing. It automatically adjusts the chemical feed based on the wastewater flow rate, preventing chemical overdosing and ensuring consistent effluent quality.

15. Does drying sludge help in achieving “Zero Liquid Discharge” (ZLD)?

Yes. By reducing sludge to a dry, stable cake, facilities can achieve significant weight reduction and potentially reuse the dried sludge as fuel or fertilizer, which is a key component of a ZLD and circular economy strategy.

16. 어떻게 하면 올바른 것을 선택할 수 있을까요? DAF 시스템 size for my factory?

The size of a DAF system is determined by the Hydraulic Loading Rate (m³/h) 및 Solids Loading Rate. For greasy wastewater (like slaughterhouses), a lower rise rate and a larger surface area are required compared to clear-water applications.

17. Are Kopay wastewater systems CE and ISO certified?

Yes. Our production partners maintain strict ISO9001:2015 quality management and CE certification, ensuring all equipment meets international safety and performance standards for global export.

18. How does Kopay International ensure quality control as a technical partner?

Kopay performs a multi-stage inspection process for every order, including raw material verification (SS304/316 testing), motor performance checks, and a 24-hour factory fatigue test before the equipment is packed in export-standard wooden crates.

19. What is the typical ROI for a sludge dewatering investment?

Most industrial plants see a Return on Investment (ROI) within 12 to 24 months. The savings come from a 70%–80% reduction in sludge weight (disposal fees), 20% lower chemical usage, and significantly reduced manual labor costs.

20. Can Kopay provide 2D/3D technical layouts for my plant?

Yes. We provide full CAD and 3D design support to ensure our equipment fits perfectly into your existing civil works or containerized treatment system.

Technical Consultation.