The biofilm method is a method of treating wastewater using a population of microorganisms immobilized on a carrier. These microorganisms form a biofilm that attaches to the surface of the carrier and achieves the purpose of wastewater purification by adsorption, degradation and transformation of organic matter in wastewater. Here are some of the key features and applications of biofilm processing:
Features:1*Biofilm structure**: The biofilm is composed of microorganisms, microbial secretions and suspended solids in wastewater, forming a porous structure, which increases the area of contact between microorganisms and wastewater and improves treatment efficiency.
2.High resistance to shock loads**: The carrier of the biofilm method provides a good growth environment, allowing microorganisms to resist the effects of changes in wastewater quality and quantity.
3.Low sludge yields: The biofilm process produces less residual sludge compared to the activated sludge process, reducing the burden of sludge treatment and disposal.
4.*No aeration required**: Some biofilm systems, such as biofilters, do not require additional aeration equipment because oxygen can naturally diffuse into the biofilm through air.
5.*Fast start-up and recovery**: Biofilm systems recover quickly after shock and have a relatively short start-up time.
6.Low Nutrient Requirements: Microorganisms in the biofilm have low nutrient requirements, simplifying nutrient dosing and management.
Applications:1Municipal Wastewater Treatment: The biofilm method is suitable for small and medium-sized municipal wastewater treatment plants, especially in areas where there is not enough land for the construction of large-scale activated sludge systems.
2.*Industrial Wastewater Treatment**: The biofilm method can effectively treat industrial wastewater containing refractory organic compounds, such as food processing wastewater, pharmaceutical wastewater and chemical wastewater.
3.Agricultural wastewater treatment: The biofilm method can be used to treat wastewater generated by agricultural activities, such as farm wastewater and crop processing wastewater.
4.Drinking water pretreatment: The biofilm method can be used as a drinking water pretreatment step to remove organic contaminants from water and improve water quality.
5.Rural and Small Community Wastewater Treatment: The biofilm method is suitable for wastewater treatment in rural and small communities due to its simple operation and maintenance.
Biofilm treatment technology is widely used, and its unique treatment mechanism gives it advantages over traditional activated sludge under specific conditions. With the biofilm method, efficient and cost-effective wastewater treatment can be achieved while reducing the environmental impact.