ZSQ series dissolved air flotation (DAF) system for high-efficiency removal of suspended solids, FOG, oil & grease, and colloidal matter from industrial wastewater. Micro-bubble technology with automatic skimming handles 4–300 m³/h across 13 standard models. Proven in food processing, pulp & paper, textile, metalworking, petrochemical, and municipal pre-treatment applications.
The Zhongsheng ZSQ series dissolved air flotation (DAF) system is a proven, high-efficiency clarification technology for removing suspended solids, fats/oils/grease (FOG), colloidal particles, and emulsified contaminants from industrial and municipal wastewater. By generating millions of microscopic air bubbles (20–60 μm) that attach to suspended particles and float them to the surface for mechanical removal, DAF achieves separation rates far superior to conventional gravity sedimentation — particularly for light, buoyant, or slowly-settling contaminants.
Available in 13 standard models from 4 to 300 m³/h, the ZSQ series serves a wide range of industries including food & beverage processing, pulp & paper, textile dyeing, metalworking, petrochemical, and municipal pre-treatment. The system meets US EPA effluent guidelines and EU Industrial Emissions Directive (IED) requirements for industrial discharge.
The DAF process operates in four stages:
| Model | Capacity (m³/h) | Recycle Flow (m³/h) | Main Motor (kW) | Scraper Motor (kW) | Compressor (kW) |
|---|---|---|---|---|---|
| ZSQ-5 | 4 – 5 | 1 – 2 | 3 | 0.37 | 1.5 |
| ZSQ-10 | 8 – 10 | 2 – 3 | 3 | 0.37 | 1.5 |
| ZSQ-20 | 15 – 20 | 5 – 7 | 5.5 | 0.37 | 1.5 |
| ZSQ-30 | 20 – 30 | 6 – 10 | 5.5 | 0.37 | 1.5 |
| ZSQ-40 | 30 – 60 | 8 – 13 | 5.5 | 0.37 | 1.5 |
| ZSQ-50 | 40 – 50 | 15 – 20 | 7.5 | 0.55 | 2.2 |
| ZSQ-60 | 50 – 60 | 18 – 27 | 7.5 | 0.55 | 2.2 |
| ZSQ-80 | 70 – 80 | 24 – 32 | 11 | 0.55 | 3 |
| ZSQ-100 | 90 – 100 | 30 – 35 | 15 | 0.75 | 3 |
| ZSQ-150 | 125 – 150 | 60 – 80 | 18.5 | 0.75 | 4 |
| ZSQ-200 | 175 – 200 | 80 – 100 | 18.5 | 0.75 | 4 |
| ZSQ-250 | 225 – 250 | 110 – 130 | 22 | 1.1 | 5.5 |
| ZSQ-300 | 280 – 300 | 120 – 180 | 37 | 1.1 | 5.5 |
| Wastewater Type | Color Removal | COD Removal | BOD₅ Removal | TSS Removal |
|---|---|---|---|---|
| Distillery / Alcohol | 30% | 30% | 30% | 77% |
| Textile Dyeing | 40% | 30% | 30% | 70% |
| Chemical Processing | 40% | 30% | — | — |
| Oily Wastewater | — | 30% | — | 85% |
| Pulp & Paper | — | 30% | — | 85% |
| Tannery / Leather | — | 30% | — | 85% |
Note: Removal rates shown are typical values for DAF as a primary treatment stage. Higher removal rates are achieved when DAF is combined with chemical dosing optimization and downstream biological treatment.
Zhongsheng ZSQ series DAF systems combine proven micro-bubble flotation technology with robust, simple construction for reliable industrial performance. With 13 standard models covering capacities from 4 to 300 m³/h, there is a ZSQ unit sized for every application — from a small food processing plant to a large industrial wastewater treatment facility. The automatic skimming system, low maintenance requirements, and simultaneous dissolved oxygen addition make the ZSQ an ideal primary clarification stage that prepares wastewater for downstream biological treatment while reducing TSS loads by up to 85%. Backed by comprehensive engineering support and competitive pricing, Zhongsheng DAF systems deliver the separation performance your process demands.
13 models from ZSQ-5 (4–5 m³/h) to ZSQ-300 (280–300 m³/h); custom designs are available up to 500 m³/h.
TSS up to 85%, COD 30%, and color up to 40% as primary treatment; higher removal rates are achievable with optimized chemical dosing.
Food & beverage, pulp & paper, textile dyeing, petrochemical, electroplating, tannery, and municipal pre-treatment facilities.
Yes, the aeration process simultaneously increases dissolved oxygen levels, benefiting downstream biological treatment stages.
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