Static Screen | Gravity Solid‑Liquid Separation for Wastewater Treatment

Static Screen | Gravity Solid‑Liquid Separation for Wastewater Treatment

Brief Description

The static screen is a non‑power solid‑liquid separation device that relies on water flow gravity. It is widely applied in the pre‑treatment stage of industrial wastewater and municipal sewage to intercept and recover suspended solids, floating matters and settleable solids. Featuring no moving components, zero driving energy consumption, simple structure and low maintenance requirement, it is suitable for treatment scenarios with medium‑or‑below water volume and available gravity drop for incoming water.

Product Overview

Within the sewage treatment process chain, the static screen is generally installed after the coarse and intermediate bar screens and before the regulating tank or hydrolytic‑acidification tank. It performs interception functions equivalent to fine‑to‑ultra‑fine screens, effectively lowering the influent suspended solid concentration and mitigating clogging risks of subsequent structures and water distribution equipment.

Product Parameters

Working Principle

1.Water distribution: Wastewater to be treated flows through the inlet pipe into the top water‑distribution tank (overflow weir). It overflows through the weir opening and spreads evenly across the full width of the sieve surface in the form of a thin water film, ensuring the full effective sieve width participates in water passing.

2.Sieving: The sieve surface is precision‑welded with wedge‑shaped screen bars (V‑profile stainless steel wires). Wastewater flows tangentially in a thin layer adhering to the sieve surface. Under gravity and hydraulic shear force, water and particles smaller than the sieve slots pass through the gaps and get discharged, while solid particles larger than the slots are trapped on the sieve surface.

3.Slag discharge: Trapped solids slide down the inclined or curved sieve surface into the bottom slag‑discharge hopper under the continuous thrust of incoming flow and self‑weight, achieving continuous automatic slag removal.

Key Design & Performance Features

1.Low energy consumption: The main sieving body requires no driving power. Only auxiliary accessories such as flushing devices and screw slag dischargers consume a small amount of electricity.

2.Clogging resistance: Wedge‑shaped sieve slots combined with water‑film scouring enable self‑cleaning. Adhered contaminants can be removed by low‑pressure flushing.

3.Easy operation and maintenance: There are no rotating vulnerable parts. Only periodic flushing and inspection of screen bars are needed. Sieve surface modules can be replaced individually without disassembling the whole unit.

4.Operating Limitations: A gravity inflow head is required. It is suitable for wastewater containing coarse suspended particles, but not applicable for colloidal micro‑fine wastewater or direct sludge dewatering.

Applications

Pre‑treatment of wastewater from beer and malt production, Baijiu and alcohol fermentation, slaughtering and meat processing, food processing, sugar manufacturing, papermaking (white‑water fibre recovery), textile printing and dyeing, leather‑making, livestock and poultry farming, as well as municipal sewage pre‑treatment.

Company Profile

WESUS is a leading manufacturer and total solution provider for advanced sewage and sludge treatment systems. Founded in Yixing, China in 2013, we offer reliable, cost-effective equipment and engineering services to global clients. Certified with ISO 9001, ISO 14001 and ISO 45001, we boast strong in-house R&D and manufacturing capabilities supported by a large production base, a professional technical team, patents and university cooperation. Our comprehensive product range includes screening, filtration, sludge dewatering, mixing, aeration and customized solutions. With end-to-end services from design to after-sales support and proven global project experience, we have earned wide recognition including national high-tech enterprise and 5-star after-sales certifications. Adhering to the philosophy of real innovation, excellence and win-win cooperation, WESUS is committed to providing smart, sustainable water treatment solutions for municipal and industrial clients worldwide.

FAQ

Q1: Are you a direct manufacturer? What certifications do you hold?
A: We are a direct manufacturer with our own production facilities and R&D team. We maintain full control over quality, cost, and delivery, and hold certifications including ISO 9001/14001 for our core products.

Q2: What types of collaboration models do you offer?
A: We provide flexible solutions:
- Equipment Supply: Standalone or packaged systems.
- Turnkey Solutions (EPC): Design, procurement, construction, and commissioning.
- Technical Cooperation: Process upgrades, operational maintenance support, and technical consulting.

Q3: How is after-sales service and support ensured?
A: We provide full lifecycle support:
- Warranty: 12–24 months on core equipment.
- Response: 7x24 remote support with fast on-site assistance when needed.
- Spare Parts: Genuine parts are stocked for long-term supply security.
- Maintenance: Annual Maintenance Contracts (AMC) are available to ensure long-term system efficiency.

Q4: What is your typical project execution process?
A: Our standardized workflow ensures efficiency and transparency:
1. Requirement Analysis → 2. Proposal & Quotation → 3. Design Finalization → 4. Production & Factory Testing → 5. Shipping & Installation → 6. Commissioning & Training → 7. After-sales Service.
Customer involvement is encouraged at key milestones.

Q5: Can you provide references or case studies?
A: We have extensive global project experience across municipal and various industrial sectors. We can provide detailed, anonymized case studies and client references upon request.

Q6: What are your payment terms and delivery lead times?
A: - Payment: We accept T/T and L/C, with standard industry progress payment terms.
- Lead Time: Standard equipment: 4–8 weeks. Large custom projects: 12–20 weeks.
A clear production schedule is provided upon contract signing.

Q7: How do you serve international clients?
A: We are experienced in international projects, arranging complete logistics (FOB, CIF, DDP, etc.) and providing full customs documentation. Our designs pre-consider compliance requirements in target markets.

Q8: Can you upgrade or retrofit existing systems?
A: Yes. We specialize in evaluating existing facilities and providing customized retrofit and expansion solutions to enhance performance and capacity with minimal investment and downtime.

Q9: How can we start a consultation?
A: Please contact our Sales Engineering team. To facilitate an efficient discussion, please have your treatment requirements, water quality data, and site information ready. We will provide a preliminary proposal and professional advice.