| 摘要 |
The Three Stage Sewage Treatment Plant is an uniquely designed three stage sewage waste water cleaning device for use in homes and other buildings which are not attached to municipal sewer systems. It employs both aerobic and anaerobic microorganisms to break down sewage, in addition to gravity separation of solids from the effluent. The cleaning process is centered around a cylindrical aerobic tank which is divided into an inner and an outer chamber by a funnel shaped clarifier. In the outer chamber of the aerobic tank, air droplines aerate the sewage, promoting the aerobic microorganisms that break down the sewage, and create turbulence. In the inner chamber, the sewage is gravity separated, such that solid particles are extracted from a cleaned effluent. The device is comprised of a pre-treatment tank, which screens out solid particles and allows for the preliminary anaerobic cleaning process, and a post-treatment tank, where the effluent is chlorinated and stored, in addition to the aerobic tank. This device makes use of an unique design that enables the use of a cylindrical aerobic tank, important for diffusion of air in the aerobic tank, in conjunction with the use of concrete as an effective building material. The design utilizes arch-shaped side tanks which strengthen the joint between the side tanks and the aerobic tank in order to allow for lesser accumulation of concrete at the joints while maintaining a strong, durable joint, thereby providing for a relatively light-weight device which is durable, non-degradable, and easily installed.
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