The deodorization covering membrane structure of sewage tank and biogas tank - steel supported reverse suspension fluorocarbon fiber membrane structure, including steel members and covering film, is characterized in that the steel members are erected on the sewage tank, and the covering film is suspended below the steel members and covered at the mouth of the sewage tank. The covering film adopts a special fluorocarbon fiber film for chemical corrosion resistance. The utility model adopts a fluorocarbon fiber film with strong corrosion resistance to cover the waste odor and suspend the fluorocarbon fiber film on the outside of the steel component, which not only gives full play to the corrosion resistance of the fluorocarbon fiber film, but also fundamentally solves the corrosion problem caused by the contact between the steel component and the corrosive gas. Therefore, the steel component can be considered according to the grade of the ordinary building structure and has a service life of 50 years, fluorocarbon fiber membranes also have 15 years of quality assurance, giving full play to the structural properties of steel components, achieving the perfect combination of structural skeleton and covering materials, is a major breakthrough in sewage secondary pollution waste odor collection.
Membrane structure, also known as fabric structure, is made of soft fabrics with excellent performance. Membrane surface is supported by internal air pressure, or by flexible cables and rigid support structure, which produces a certain pre-force on the membrane surface, thus forming a new space structure system with a certain stiffness and can cover a large space. Membrane structure can be generally divided into three types: air-supported membrane structure (i.e. inflatable membrane structure), tensioned membrane structure and skeleton-supported membrane structure. They have different structural characteristics, architectural manifestations and are suitable for different applications. The steel-supported reverse suspension fluorocarbon fiber membrane structure is a new type of structure specially designed for the cover of sewage pool. Corrosion-resistant fluorocarbon fiber membrane is selected as the covering material, and the corrosive environment of sewage pool is adapted by reverse suspension. In China, Xinhua Pharmaceutical Factory, Xincheng Co., Ltd., Lianhua Science and Technology Pharmaceutical Factory and other sewage stations have taken the lead in using steel-supported anti-suspension fluorocarbon fiber membrane to cover sewage pools, and achieved good results. 
The steel-supported reverse-suspension fluorocarbon fiber membrane structure has the characteristics of durability, safety, quick installation, convenient maintenance, beautiful appearance and economy, which is more prominent than the traditional ordinary carbon steel skeleton + sunshine plate and stainless steel skeleton + glass plate. It is worth popularizing in the coverage of sewage treatment tank and biogas digester.