A complete chain from screening to dewatering #
Sewage and wastewater treatment equipment is Yuan Chang’s core product line. It covers front-end screening, grit removal, oil-water separation, sedimentation, and dissolved air flotation; mid-stage sludge thickening and chemical conditioning; and back-end sludge dewatering. Equipment can be supplied as individual machines or integrated into a complete treatment plant.
Official category page: Sewage / Wastewater Treatment Equipment
Belt Filter Presses #
Belt filter presses are used for dewatering, volume reduction, and recovery of industrial process sludge. Yuan Chang states that its belt presses are used in electronics, semiconductor, electroplating, chemical, printing and dyeing, food processing, steel, and pharmaceutical industries, and can handle organic, inorganic, and mixed sludge.
- TDI Series — Conditioning + single filter belt.
- TD2 Series — Conditioning + double filter belt.
- TDR Series — Conditioning + drum thickening + double filter belt.
- TA / TB / TE Series — Conditioning + drum thickening + double filter belt.
- TA3 / TB3 / TE3 Series — Conditioning + gravity belt thickening + double filter belt, triple-belt design.
The official page lists corrosion-resistant and high-strength materials, a compact structure, low energy consumption, and easy maintenance, with optional automatic control. It also describes three patented designs:
- High-pressure reciprocating washing system (optional) — High-pressure water jets travel back and forth to clean the filter belt, maintaining permeability and belt life. Yuan Chang states water savings of 55%–72%. Patent numbers: Taiwan M276045, China ZL95215797.7, Germany 202005006697.4.
- Rotary drum screen thickening system — A screen separates free surface water first, raising sludge solids content and reducing the load on the filter belt. Patent numbers: Taiwan 119141 and M348113; China ZL96249032.6.
- Sludge discharge direction adjustment plate — Adjusts the discharge direction to improve cake release and belt operation. Patent number: Taiwan 126352.
Sludge Dewatering Filter Press for Wastewater Treatment #
Filter presses use filter plates and filter cloths for solid-liquid separation. They suit applications requiring higher cake dry solids or fine-particle sludge. The official page lists a broad range of applications:
- Food: Vegetable oil, edible oil, sugar syrup, starch, fruit juice, beverages, yeast, alcoholic drinks, flavorings, MSG, and concentrated soup bases.
- Wastewater and environmental treatment: Municipal wastewater, industrial park wastewater, semiconductor, LED panel, solar panel, printing and dyeing, leather, mining, smelting, brewing, pharmaceutical, electroplating, electrolysis, steel, metal processing, chemical, paper, stone, water treatment plants, construction slurry, and river, port, and lake sediment.
- Pharmaceutical: Antibiotics, pharmaceutical intermediates, traditional Chinese medicine, APIs, pesticides, amino acids, and blood products.
- Metallurgy, mining, and petroleum: Coal, gold, silver, copper, iron, zinc, and rare-earth mineral processing, plus petroleum dewaxing.
- Clay, stone, and chemical: Bentonite, ceramic clay, kaolin, gypsum, coatings, pigments, dyes, soda ash, chlor-alkali, water-treatment chemicals, and graphite.
Model families include TC0, TC1, TC2-N, TC2N, TC2A, TC2B, TC3, TL/TLM, TM2, TM2 Automatic, TM2A, TM2B, TM3, and TRM. The page also provides reference diagrams for sludge treatment flow, cake discharge arrangements, membrane filter plate pressing, and treatment-time comparisons.
Sludge Dewatering Filter Press category
Screw Press Sludge Dewatering Machine #
Screw presses provide continuous dewatering by mechanical extrusion. They suit fibrous and organic sludge and applications requiring low maintenance. Yuan Chang offers:
- SK Series — Heavy-duty single screw.
- SY2 Series — Heavy-duty twin screw.
- SY-S Series — Heavy-duty single screw.
- SE Series — Medium-duty single screw.
Screw Press Sludge Dewatering Machine category
Volute Press for Sludge Dewatering #
The volute press is a continuous sludge dewatering design for space-limited or continuously operating applications. The official category describes it as a “volute type – continuous process.”
Powder Dissolution Automatic Processing Machine #
These machines dissolve and dose powder chemicals for sludge conditioning and wastewater treatment. Yuan Chang offers several tank configurations and automation levels:
- PL Series — Semi-automatic single-tank batch type.
- PL1 Series — Automatic double-tank continuous type.
- PL2 Series — Fully automatic triple-tank continuous type.
- PL3 Series — Three-tank high-concentration series.
- PL3-M Series — Automatic powder dissolving system.
Powder Dissolution Automatic Processing Machine category
Continuous Sludge Thickener #
Thickening reduces sludge volume before dewatering and lowers the load on downstream equipment. Yuan Chang offers:
- RDT Series — Drum-type continuous sludge thickener.
- SBT Series — Gravity filter belt type.
Continuous Sludge Thickener category
Inclined Plate Type Rapid Sedimentation Tank #
The DAT Series uses inclined plates to increase settling area for rapid solid-liquid separation. The official specification table lists DAT-5 through DAT-200, with capacity around 3–200 m³/hr, inclined plate area of 8–280 m², and scraper power of 1/4–1 HP. Dimensions and capacity vary by model; customization is available.
Inclined Plate Type Rapid Sedimentation Tank category
Oil and Water Separation Equipment #
These units remove floating oil from wastewater and reduce the load on downstream treatment. Yuan Chang offers:
- GL Series — Belt series.
- GV Series — Tube series.
Oil and Water Separation Equipment category
Desander / Sand Water Separator #
These units remove grit and higher-density particles to protect downstream equipment. Yuan Chang offers:
- AA Series — Closed swirling type desander.
- AB Series — Screw sand water separator.
Desander / Sand Water Separator category
Air Flotation Equipment #
Dissolved air flotation lifts suspended solids for removal, making it suitable for wastewater with oil, colloids, and light suspended solids. Yuan Chang offers:
- DAC Series — Circular barrel.
- DAR Series — Rectangular tank.
- DAL Series — Shallow air flotation.
Air Flotation Equipment category
Automatic Bar Screen and Solid-Liquid Separators #
These units remove large debris, plastic fragments, fibers, and suspended solids at the front end, protecting pumps and downstream treatment. Yuan Chang offers:
- YC1 Series — Automatic bar screen for small/medium slag amounts.
- YC3 Series — Cable-operated type for heavy/extra-heavy duty.
- YCW Series — Paddle wheel type.
- YCT Series — Stepped type.
- YCR Series — Rotary type.
- DR Series — Outer wheel screen solid-liquid separator.
- DG Series — Internal drum screen solid-liquid separator.
- YU Series — Inclined screen solid-liquid separator.
Sewage / Waste Water Filtration Equipment #
Used for water reuse, pure-water pretreatment, or final polishing:
- Micro screen filter — Internal drum type.
- Super intelligent precision differential pressure filter — Intelligent differential-pressure filtration.
- Automatic pressurized sand filter — Fully automatic pressure type.
- Wastewater continuous sand filter — Fully automatic continuous-flow operation.
Sewage / Waste Water Filtration Equipment category
Selection note #
Dewatering equipment selection depends on sludge type, moisture content, treatment capacity, chemical conditions, site space, and disposal method. Yuan Chang’s official product pages provide series specifications and application notes; final selection, capacity, and configuration should be confirmed directly with the company.