DTWA series of sewage treatment module is a new kind of sewage treatment equipment which is independently researched and developed by our company based on the traditional sewage treatment technology. The characteristics include: It can be used for surface or below the surface (the surface above the equipment can be used as green or other sites), without the need of housing, heating and insulation; The contact oxidation process employs plug-flow biological contact oxidation tank, whose treatment effect is better than that of completely mixed-type or two-serial type of completely mixed biological contact oxidation tank. Smaller than conventional activated sludge tank, it is more flexible to various water qualities; resistant to shock and loading; stable in water quality and does not produce sludge bulking. The tank employs a new kind of flexible three-dimensional filler. The conventional filler has large surface area, and the micro-organisms are easy to film forming and stripping, while this new filler, on the same organic loading conditions, ensures high removal rate of organic matter increasing the solubility of oxygen in water; The filler’s volume load is relatively low, in addition to the micro-organisms are in autoxidation stage, thus it produces less sludge. The sludge can be removed over three months (90 days) once. (The sludge can be aspirated by night-soil cart or dehydrated into sludge cake and then be carted away.); The whole equipment is equipped with automatic electrical control system and failure alarm system. Safe and reliable, it does not require expert management generally. Timely maintenance and repair is required only; Frp, stainless steel and carbon steel structures are employed. Corrosion-resistant and anti-aging, it can service over 50 years; The whole equipment can be installed and handled easily. All the machinery and device are controlled automatically; The whole equipment occupies small area and can be set up easily. Arbitrary compatibilizer can be realized based on customer needs.
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