1. Pretreatment stage: coarse screening and solids interception

Screen (coarse/medium/fine):

Application scenarios:

Water inlet of municipal sewage treatment plant and front end of industrial wastewater treatment.

effect:

Intercept large solids (branches, plastics, household garbage) to prevent clogging of pumps, valves and pipes;

Protect subsequent biological treatment units (such as aeration tanks and MBR membranes) from mechanical damage.

Screen Type:

Stepped grid screen: used for high-flow sewage, with a gap of 20-50mm;

Drum type fine screen: gap 1-6mm, removes hair, fiber and other small debris.

2. Fine filtration: suspended matter removal and pre-membrane protection

Microfiltration screen (vibrating/rotating drum type):

Application scenarios:

Pretreatment of membrane bioreactor (MBR) and reverse osmosis (RO) systems.

effect:

Removes 0.1-1mm suspended particles, reduces membrane fouling risk, and extends membrane life by 3-5 times;

Reduce the frequency of chemical cleaning (e.g., extend the RO membrane cleaning cycle from monthly to quarterly).

Screen Type:

Stainless steel wedge wire screen: pore size 0.2-0.5mm, strong corrosion resistance;

Polyurethane self-cleaning screen: with bouncing ball design to prevent clogging.

3. Industrial wastewater treatment: separation of special pollutants

High frequency vibrating screen:

Application scenarios:

Electroplating wastewater (metal particles), textile printing and dyeing wastewater (fiber debris), food processing wastewater (grease suspended matter).

effect:

Separate heavy metal particles (such as copper powder, nickel slag) and recycle resources;

Intercept fiber impurities to avoid entanglement of biological fillers or clogging of aeration heads.

Screen Type:

Acid and alkali resistant polyester screen: pH tolerance range 1-14;

Anti-stick coating screen: reduces grease adhesion (such as PTFE coating).

4. Seawater desalination and drinking water purification

Multi-layer composite screen:

Application scenarios:

Seawater pretreatment (removal of algae and shell fragments), raw water filtration in drinking water plants.

effect:

Protect high-pressure pumps and reverse osmosis membranes from wear caused by hard particles;

Improve effluent water quality (turbidity ≤ 1NTU).

Screen Type:

Titanium alloy screen: resistant to seawater corrosion, service life of more than 10 years;

Ultra-high molecular weight polyethylene (UHMWPE) screen: prevents biofilm growth.

5. Sludge treatment and dewatering

Centrifugal screen:

Application scenarios:

Feed end of belt filter press and centrifugal dehydrator.

effect:

Pre-screening of large particles of impurities (such as gravel and plastic pieces) in sludge to prevent damage to dewatering equipment;

Improve the solid content of sludge (from 0.5% to 5%) and reduce the energy consumption of subsequent treatment.