Sewage primary sedimentation treatment method and system for removing intensified suspended solid inorganic component

• Main Authors: SUN YONGLI, ZHENG XINGCAN, ZHANG XIUHUA
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2010
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a sewage primary sedimentation treatment method and a sewage primary sedimentation treatment system for removing an intensified suspended solid inorganic component. In a high-load primary sedimentation tank, water flow in the tank body flows upwards slowly and rotationally flows in a horizontal direction, a suspended solid component with higher content of inorganic components and relatively higher weight deposits at the bottom of the high-load primary sediment tank to be discharged as settled sludge, and a suspended solid component with lower content of inorganic components and relatively less weight is used as outflow water of the primary sedimentation system along with outflow water flow which flows upwards, so that the ratio of VSS to SS is increased and the ratio of SS to BOD5 is decreased, thereby improving integral efficiency of a subsequent biological treatment system, treatment efficiency and operation stability, and particularly reducing residual sludge yield and improving slu