March 20, 2011, We successfully developed the buried sewage treatment equipment and successfully applied for patent, the device's main properties: 1, PVDF membrane superior performance, with excellent oxidation resistance, high strength, external pressure structure design, high flux, high filtration precision 2, the automatic control system, superior performance, buried sewage treatment equipment automatic control system consists of PH control systems, level control system, temperature control systems, combustible gas monitoring system, dissolved oxygen monitoring system composition. Run automatically, unattended, full touch screen display for easy day to day management. 3, excellent safety performance, the use of glass, steel, service life of 30 years for cold, high altitude, combustible gas filtered through the air filter into the air, explosive energy and reduce harm to human body.