Sewage & Wastewater Treatment Solutions | Custom DAF, MBR, Filter Press

Sewage and wastewater treatment refers to the process of removing pollutants from domestic sewage, commercial wastewater, municipal wastewater and industrial effluent so that the treated water can meet discharge or reuse requirements. For B2B buyers, the main challenge is choosing a system that matches the real influent quality, site conditions and required effluent standard.
A common treatment process may include:

Screening is the first step. It removes large solids such as plastic, fibers, food residues and floating debris. Equalization tanks then balance flow and pollutant concentration, which is important for hotels, residential communities, factories, schools, industrial parks and service areas where wastewater discharge may change throughout the day.
Pretreatment depends on wastewater characteristics. For oily or grease-containing wastewater, oil-water separators, grease traps or DAF dissolved air flotation may be required. DAF can remove fine suspended solids, emulsified oil and floating sludge, especially when combined with coagulation and flocculation. For industrial wastewater, pH adjustment, chemical dosing or separate pretreatment may be needed before biological treatment.
Biological treatment is widely used for biodegradable wastewater. MBR systems combine activated sludge and membrane separation, offering clearer effluent and compact footprint. MBBR systems use suspended biofilm carriers to improve biomass concentration and handle load fluctuation. SBR systems operate through timed cycles of filling, aeration, settling and decanting, making them suitable for variable-flow projects.
After biological treatment, further polishing may be required. Lamella clarifiers improve solid-liquid separation. Sand filters, activated carbon filters, membrane filtration or disinfection units can help meet stricter discharge or reuse standards. Treated effluent may be discharged or reused for non-potable applications such as irrigation, flushing or landscaping, depending on local regulations and final water quality.
Sludge management should not be ignored. DAF sludge, chemical sludge and biological sludge must be collected and removed regularly. Sludge dewatering equipment can reduce water content, transportation volume and disposal cost.
Correct system selection requires project data, including daily flow, peak flow, wastewater source, COD, BOD, TSS, ammonia nitrogen, phosphorus, oil content, pH, temperature, salinity, discharge or reuse standard, available space, power supply, installation type and automation requirements.
A common mistake is using a standard sewage system for all wastewater. Industrial effluent, oily wastewater and mixed wastewater may need additional pretreatment or process testing. Qingdao Jinwantong provides customized sewage and wastewater treatment equipment and technical selection support. Send your water quality data, flow rate and outlet requirement to receive a suitable configuration and quotation.