Municipal Drainage
The National Implementation Opinions on Further Strengthening the Allocation and Utilization of Reclaimed Water clearly require that reclaimed water be included in the unified allocation of water resources, and mandate the priority use of reclaimed water within the coverage area of the reclaimed water pipeline network, covering areas such as industrial cooling, municipal greening, and ecological water replenishment. Microfiltration membranes (MF), with pore sizes of 0.1-10 micrometers, can efficiently remove suspended solids, colloids, and bacteria from municipal sewage, producing effluent turbidity below 1 NTU, meeting the Class A standard of the “Discharge Standard of Pollutants for Urban Wastewater Treatment Plants.” Their strong anti-fouling properties and stable operation make them particularly suitable as pretreatment units for reclaimed water treatment, ensuring the quality of influent for subsequent processes such as reverse osmosis. Fumo Company possesses a complete series of microfiltration membrane products, including curtain and tubular membranes, providing strong technical support for reclaimed water treatment in municipal wastewater plants.
Typical Water Quality
The volume of municipal sewage is directly related to the urban population and economic development level. With the acceleration of urbanization, both the volume and concentration of pollutants in municipal sewage discharge are on the rise. In cities, sewage mainly originates from household, industrial, and commercial activities, with household sewage being the primary source, accounting for over 70% of total discharge. The main components of municipal wastewater include organic matter and inorganic salts, with organic matter being the core component, including proteins, fats, and carbohydrates. Common pollutant indicators include: COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), ammonia nitrogen, total nitrogen, and total phosphorus.
Typical Process Flow
This typical process effectively removes pollutants such as carbon, nitrogen, and phosphorus from water. Municipal wastewater first undergoes pretreatment to remove large particulate matter and suspended solids. It then enters an anoxic tank, where denitrifying bacteria convert nitrate nitrogen into nitrogen gas to remove ammonia. Next, the wastewater flows into an aerobic tank, where aerobic microorganisms degrade organic matter (such as COD and BOD) and nitrify, converting ammonia nitrogen into nitrate. Afterward, it enters a microfiltration membrane tank, where membrane separation technology efficiently retains activated sludge and large molecules, enhancing sludge-water separation. The effluent then enters a denitrification filter to further enhance nitrogen removal. Subsequently, coagulants are added to a coagulation sedimentation tank to form flocs, further removing total phosphorus and remaining suspended solids. The finally treated wastewater is either reused or discharged.
Typical Membrane Elements
Curtain-type MBR Membrane Module
Tube-type Microfiltration Membrane Module
See product center for membrane element models
See case studies for application examples
