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The rectangular secondary sedimentation tank with peripheral inlet and outlet is developed based on the circular peripheral inlet and outlet radial flow secondary sedimentation tank, integrating efficient hydraulic design with hydraulic sludge discharge.
It features higher surface load and solid load, smaller footprint, and shorter sludge discharge time.
The rectangular secondary sedimentation tank with peripheral inlet and outlet is developed based on the circular peripheral inlet and outlet radial flow secondary sedimentation tank, integrating efficient hydraulic design with hydraulic sludge discharge.
It features higher surface load and solid load, smaller footprint, and shorter sludge discharge time.
Description
Compared with traditional rectangular sedimentation tanks , the Trans-flo sedimentation tank’s advantages in higher surface load and solid load are primarily determined by its structural
Characteristics
• More Rational Flow Pattern: After the mixed liquid is evenly distributed through the water distribution pipe, it descends to the tank bottom and flows along the sludge surface to the opposite side of the tank. Here, the mixed liquid fully mixes with the sludge layer. Through flocculation and sedimentation, most suspended solids are intercepted. The liquid then rises slowly along the tank wall, separating clarified water during the ascent and flowing back to the outlet trough to form a large circular density current. Sludge settles to the bottom, creating a density flow pattern that enhances solid-liquid separation. In contrast, horizontal flow sedimentation tanks operate based on laminar flow theory, where suspended solids in the mixed liquid settle by gravity. With water inlet at one end and outlet at the other, dead zones easily form at both ends, and turbulence occurs in some areas, limiting the treatment load.
• High Volume Utilization Rate: The peripheral inlet and outlet sedimentation tank distributes water evenly along the tank length, and the formation of a large circular density current achieves a volume utilization rate of over 85%. Horizontal flow sedimentation tanks, with only one inlet and one outlet, are prone to "dead zones" and "turbulent zones," resulting in much lower volume utilization.
Advantage
• Circulation Design: Reduces flow velocity to 0.3–0.5 m/s, prolonging the settlement time of suspended solids and ensuring water quality.
• Annular Water Distribution: Minimizes dead zones, increasing the treatment capacity per unit area by 20%–30%, making it suitable for projects with tight land constraints.
• Strong Impact Load Resistance: Provides significant protection for subsequent biological treatment units.
• Low Operation and Maintenance Costs: Reduces energy consumption by 15%–20%, improves sludge thickening efficiency, and cuts energy and maintenance expenses.
• Versatile Application: Enhances treatment capacity by 30%–50% without additional land occupation. The scalable modular design of the rectangular secondary sedimentation tank allows shared walls with rectangular bioreactor tanks.
Description
Compared with traditional rectangular sedimentation tanks , the Trans-flo sedimentation tank’s advantages in higher surface load and solid load are primarily determined by its structural
Characteristics
• More Rational Flow Pattern: After the mixed liquid is evenly distributed through the water distribution pipe, it descends to the tank bottom and flows along the sludge surface to the opposite side of the tank. Here, the mixed liquid fully mixes with the sludge layer. Through flocculation and sedimentation, most suspended solids are intercepted. The liquid then rises slowly along the tank wall, separating clarified water during the ascent and flowing back to the outlet trough to form a large circular density current. Sludge settles to the bottom, creating a density flow pattern that enhances solid-liquid separation. In contrast, horizontal flow sedimentation tanks operate based on laminar flow theory, where suspended solids in the mixed liquid settle by gravity. With water inlet at one end and outlet at the other, dead zones easily form at both ends, and turbulence occurs in some areas, limiting the treatment load.
• High Volume Utilization Rate: The peripheral inlet and outlet sedimentation tank distributes water evenly along the tank length, and the formation of a large circular density current achieves a volume utilization rate of over 85%. Horizontal flow sedimentation tanks, with only one inlet and one outlet, are prone to "dead zones" and "turbulent zones," resulting in much lower volume utilization.
Advantage
• Circulation Design: Reduces flow velocity to 0.3–0.5 m/s, prolonging the settlement time of suspended solids and ensuring water quality.
• Annular Water Distribution: Minimizes dead zones, increasing the treatment capacity per unit area by 20%–30%, making it suitable for projects with tight land constraints.
• Strong Impact Load Resistance: Provides significant protection for subsequent biological treatment units.
• Low Operation and Maintenance Costs: Reduces energy consumption by 15%–20%, improves sludge thickening efficiency, and cuts energy and maintenance expenses.
• Versatile Application: Enhances treatment capacity by 30%–50% without additional land occupation. The scalable modular design of the rectangular secondary sedimentation tank allows shared walls with rectangular bioreactor tanks.