| 摘要 |
A method for treating the liquid effluent from a septic tank is disclosed, as is apparatus in which the method can be practiced. The method involves pumping the effluent to the bottom of a treatment vessel packed with pebbles, glass beads or the like to fill the vessel to a predetermined level, and then pumping additional effluent to the bottom to cause a non-turbulent, upward movement of the effluent in the vessel. Treated effluent is withdrawn from the upper portion of the vessel at substantially the rate at which the effluent is pumped to the bottom of the vessel, which is sufficiently low that the treated effluent withdrawn from the upper portion of the vessel is substantially devoid of organic material. The withdrawn effluent is pasteurized. A structure in which a desired joint pattern is achieved by using each of two different blocks in two different relative rotational positions is also disclosed.
|
