WASTE TREATMENT SYSTEM

摘要

The invention provides systems and apparatus for treating waste-containing water such as toilet waste. In one aspect, the invention provides apparatus for secondary treatment of effluent from a water treatment process, the apparatus comprising a medium-filled tank adapted for gravity flow of the effluent through a plurality of discrete zones formed in the medium, wherein effluent flow through zones is alternately upward or downward. The invention further provides a waste treatment system comprising a primary tank for receiving undiluted waste and a medium-filled secondary tank for receiving gravity feed of effluent from the primary tank, wherein the secondary tank is adapted for gravity flow of the effluent through a plurality of discrete zones formed in the medium, and wherein effluent flow through zones is alternately upward or downward. The invention also provides a waste treatment system comprising a tank having a first zone and a plurality of discrete medium-filled secondary zones, wherein undiluted waste is received in the first zone and effluent therefrom flows under gravity through the secondary zones to exit the system with effluent flow through the secondary zones being alternately upward or downward.