Aerobic wastewater treatment systems and methods of fabrication

An aerobic wastewater treatment system, comprising:

• a treatment tank having a tank interior;
• an aeration chamber in the tank interior;
• an air inlet conduit disposed in fluid communication with the aeration chamber;
• a diffuser in the aeration chamber, the diffuser including:
• a vertical diffuser conduit disposed in fluid communication with the air inlet conduit;
• an elongated horizontal diffuser conduit disposed in fluid communication with the vertical diffuser conduit, the horizontal diffuser conduit disposed longitudinally off-center with respect to the vertical diffuser conduit and having a pair of opposite diffuser conduit outlet ends, the vertical diffuser conduit being closer to one than the other of the diffuser conduit outlet ends;
• a pair of spaced-apart diffuser discharge conduits disposed in fluid communication with the horizontal diffuser conduit at the diffuser conduit outlet ends, respectively;
• at least one discharge opening in each of the diffuser discharge conduits;
• and
• the wastewater inlet conduit discharges directly above the horizontal diffuser discharge conduit and in-plane with and between the diffuser discharge conduits of the diffuser in the tank interior of the treatment tank;
• a wastewater inlet conduit disposed in fluid communication with the aeration chamber, the wastewater inlet conduit disposed above and substantially equidistant between the diffuser discharge conduits of the diffuser and extending to one side of the vertical diffuser conduit;
• a clarifier in the tank interior, the clarifier including:
• a clarifier interior, and
• a clarifier inlet establishing fluid communication between the aeration chamber and the clarifier interior, and
• an effluent outlet conduit disposed in fluid communication with the clarifier interior of the clarifier.

An aerobic wastewater treatment system, comprising:

• a treatment tank including:
• a tank bottom;
• a tank sidewall extending from the tank bottom;
• an effluent outlet conduit opening in the tank sidewall;
• a tank interior formed by the tank bottom and the tank sidewall;
• and
• a vented tank cover on the tank sidewall;
• an aeration chamber in the tank interior an air inlet conduit disposed in fluid communication with the aeration chamber;
• a diffuser in the aeration chamber, the diffuser including:
• a vertical diffuser conduit disposed in fluid communication with the air inlet conduit;
• an elongated horizontal diffuser conduit disposed in fluid communication with the vertical diffuser conduit, the horizontal diffuser conduit disposed longitudinally off-center with respect to the vertical diffuser discharge conduit and having a pair of opposite diffuser conduit discharge ends, the vertical diffuser conduit being closer to one than the other of the diffuser conduit outlet ends;
• a pair of spaced-apart diffuser discharge conduits disposed in fluid communication with the horizontal diffuser conduit, the diffuser discharge conduits offset with respect to the vertical diffuser discharge conduit;
• at least one discharge opening in each of the diffuser discharge conduits;
• and
• the wastewater inlet conduit discharges directly above the horizontal diffuser conduit and in-plane with and between the diffuser discharge conduits of the diffuser in the tank interior of the treatment tank;
• a wastewater inlet conduit disposed in fluid communication with the aeration chamber, the wastewater inlet conduit disposed above and substantially equidistant between the diffuser discharge conduits of the diffuser and extending to one side of the vertical diffuser conduit;
• a clarifier in the tank interior, the clarifier including:
• a vertical outside clarifier wall portion extending adjacent and parallel to and engaging the tank sidewall of the treatment tank;
• an effluent conduit opening in the outside clarifier wall portion and registering with the effluent outlet conduit opening in the tank sidewall of the treatment tank;
• an inside clarifier wall portion disposed at an acute angle to the outside clarifier wall portion;
• a clarifier interior formed by and between the outside clarifier wall portion and the inside clarifier wall portion, the inside clarifier wall portion separating the aeration chamber from the clarifier interior;
• and
• a clarifier inlet establishing fluid communication between the aeration chamber and the clarifier interior, and
• an effluent outlet conduit disposed in fluid communication with the clarifier interior of the clarifier and extending through the effluent conduit opening and the effluent outlet conduit opening.