Speedy Separation Tube Settler Lamella

The physics of speedy separation

Conventional sedimentation basins rely on gravity across the full water depth - typically 2–4 metres. A particle must travel this entire vertical distance before it's captured. In a tube settler, the settling distance is reduced to the diameter of a single channel: just 25–80 mm. This alone accounts for a 50–160× reduction in settling path length.

But short distance alone isn't enough. The engineering breakthrough is maintaining stable laminar flow inside every channel - Reynolds number kept below 500. In the laminar regime, water moves in orderly parallel layers with zero turbulent mixing. Particles that settle onto a channel wall stay on that wall. They slide down the 60° incline under gravity and exit as concentrated sludge, while clarified water continues upward. No turbulence means no re-entrainment - the single biggest efficiency leak in open basins.

The 60° angle is not arbitrary. It is the balance point between two competing forces: steep enough for gravity-driven sludge self-cleaning (no mechanical scrapers needed), shallow enough to maximise the projected settling area per vertical metre of tank depth. At 60°, each metre of module height projects approximately 0.87 m² of effective settling area - and with hundreds of channels packed into that metre, the total effective area multiplies 6–10× the tank footprint.

Key advantages

Technical specifications

Material options PP (food-grade, NSF-compatible) / PVC (industrial-grade, chemical-resistant) Channel inclination 60° - optimised for self-cleaning sludge discharge Available diameters φ25 mm / φ35 mm / φ50 mm / φ80 mm Module dimensions 1,000 × 1,000 × 866 mm (L×W×H) Flow regime Laminar (Re < 500) - zero turbulent re-entrainment Surface loading rate (municipal) 0.8–2.5 m³/h·m² Surface loading rate (industrial) 1.5–6.0 m³/h·m² TSS removal efficiency ≥ 92% (influent ≤ 1,500 mg/L) Effluent turbidity (with coagulation) < 2 NTU Hydraulic retention time 15–30 min Module connection Tongue-and-groove interlocking, silicone gasket sealed UV protection Available for both PP and PVC Operating temperature 5°C – 50°C Service life 10–15 years MOQ No minimum order quantity Shipping terms FOB Ningbo / Shanghai

Tube settler vs conventional clarifier - quantitative comparison

Choose your tube settler diameter - selection guide

Four channel diameters engineered for specific influent characteristics. The decision rule: higher TSS or fouling risk → larger diameter to prevent clogging; lower TSS → smaller diameter to maximise surface area.

φ25 mm - High Clarity SSA: ~139 m²/m³ (highest in range) Best for: Drinking water, beverage processing, low-turbidity raw water Influent TSS: ≤ 300 mg/L Surface loading: 1.5–2.5 m/h Material: PP (food-grade) Typical effluent: < 2 NTU → Potable water plants, pre-filtration for RO

φ35 mm - General Purpose SSA: ~109 m²/m³ Best for: Municipal STP, general industrial wastewater Influent TSS: ≤ 800 mg/L Surface loading: 2.0–3.0 m/h Material: PP or PVC (UV-stabilised) Typical effluent: < 5 NTU → Secondary clarifiers, stormwater pre-treatment

φ50 mm - Heavy Duty SSA: ~87 m²/m³ Best for: Sewage, mining, chemical plant effluent Influent TSS: ≤ 1,500 mg/L Surface loading: 2.5–4.0 m/h Material: PVC (industrial-grade) Typical effluent: < 10 NTU → Mining tailings, food processing, textile dye

φ80 mm - Extreme Load SSA: ~50 m²/m³ (lowest SSA, highest flow) Best for: Extreme TSS, coarse solids, high hydraulic load Influent TSS: ≤ 2,000 mg/L Surface loading: 3.0–6.0 m/h Material: PVC (heavy-duty) Typical effluent: < 20 NTU → Dredging runoff, quarry wash water, primary treatment

Applications

Potable Water Drinking water treatment plants φ25 mm PP food-grade modules. Reduces turbidity to <2 NTU ahead of filtration - maintains performance during seasonal high-turbidity events. Compatible with NSF/ANSI 61 requirements. Municipal STP Primary & secondary clarifiers φ35–50 mm PVC for STPs handling 500–50,000 m³/d. Reduces downstream BOD load on biological stages. Retrofit into existing basins for 2–3× capacity gain. Industrial Mining, chemical, food & beverage φ50–80 mm heavy-duty PVC. Handles acidic/alkaline effluent, variable TSS loads, and shock hydraulic events. Chemical-resistant formulation for aggressive process water. Retrofit Upgrade Existing clarifier capacity expansion Install tube settler modules into current basins - double throughput without a single new concrete pour. 2–5 day installation, zero downtime for adjacent treatment units.

Installation - delivery to operation in 72 hours

1 Basin survey - Confirm tank dimensions and structural load capacity (≥ 150 kg/m²). Juntai engineers calculate module quantity, layout, and support frame design. 24-hour turnaround on layout drawings. 2 Support frame installation - Stainless steel 304/316 support grid. Laser-level alignment ensures consistent 60° module inclination across the entire basin area. Tolerances held within ±2 mm. 3 Module assembly - Interlock PP/PVC panels via tongue-and-groove joints. Seal with supplied silicone gaskets. Full basin coverage in hours - no special tools required. 4 Hydraulic balancing - Set inlet weirs for uniform flow distribution across all modules. Target surface loading per diameter: 0.8–2.5 m³/h·m². Verify with tracer dye test. 5 Commissioning - 48-hour monitored startup. Adjust coagulant dose based on real-time effluent turbidity and sludge blanket depth readings. Final performance verification report provided to client.