| 摘要 |
<p>A simple and improved septic tank wastewater treatment system is needed to improve effluent quality and reduce conventional onsite system failures such as hydraulic overloading and formation of a clogging biomat in the soil treatment area. One illustrative embodiment of the septic tank system (10, 100, 122) disclosed includes a septic tank system having a primary treatment compartment (28, 116) for settling solids and floating fats, oils and grease, and a second treatment compartment (34, 141) adapted to provide an upflow anaerobic sludge blanket (UASB) process for providing additional treatment of the wastewater prior to discharge to soil treatment areas. Another illustrative embodiment of the septic tank system includes separate primary (100) and UASB tanks (122) coupled in series.</p> |
