Patent ID: 7294260

Claim:
An aerobic wastewater treatment plant comprising: a tank having a peripheral wall and a generally planar bottom wall, said peripheral wall comprising first and second spaced side walls and first and second spaced end walls, each of said first and second end walls being radiused and having at least portions thereof which have the same radius, said first and second side walls having a shape and being adjoined to said first and second end walls such as to form a smooth contour on the outer surface of said peripheral wall; a first interior wall connected to said peripheral wall and said bottom wall, said first interior wall being spaced from said first end wall, a first compartment being formed by said first end wall and said first interior wall, said first compartment forming a pretreatment chamber and having an inlet and an outlet; a second interior wall connected to said peripheral wall and said bottom wall, said second interior wall being spaced from said first interior wall and said second end wall, said second interior wall and said second end wall cooperating to form a generally cylindrical second compartment forming an aerobic treatment chamber, said second compartment having an inlet and an outlet; a third compartment forming a holding chamber formed between said first compartment and said second compartment, said third compartment having an inlet and an outlet; said outlet from said first compartment being in open communication with said inlet to said second compartment; said outlet from said second compartment being in open communication with said inlet to said third compartment.