Sinomeasure mitir socodka qulqulka kanaalka furan iyo mitirka heerka ultrasonic ayaa loo adeegsadaa warshadda lagu daweeyo bulaacada ee magaalada Leshan, ee Gobolka Sichuan, kuwaas oo dhammaantood adeegsada tignoolajiyada AAO (Anaerobic Anoxic Oxic).
Habka Anaerobic/Anoxic/Oxic (A/A/O) ayaa si weyn loogu dabaqaa dhirta lagu daweeyo biyaha wasakhda ah ee degmadu, taas oo loo aaneynayo waxtarka wanaagsan ee nafaqeynta.
