| 摘要 |
A sewage process is provided, which comprises the following steps: a) water inlet process comprising introducing raw water into a biological reaction tank (1) according to a target time or liquid level; b) reaction process comprising aerating and stirring intermittently in the biological reaction tank (1); c) treated water discharging process comprising subjecting the mixed solution of the biological reaction tank (1) to solid-liquid separation by membrane separation device (2) to obtain first penetration liquid, which is taken as the final treatment water; d) standby process comprising stopping aerating in the biological reaction tank (1); and e) phosphorus-enriched water discharging process comprising keeping anaerobic condition in the biological reaction tank (1) and subjecting the mixed solution of the biological reaction tank (1) to solid-liquid separation by membrane separation device (2) to obtain second penetration liquid, which enters the interior of a phosphorus recycling unit (5), which is set independent of the biological reaction tank (1), where the phosphorus recycling unit (5) removes phosphorus from water and the second penetration liquid becomes water with low phosphorus, which is refluxed to the biological reaction tank (1); and repeating above steps in cycle. A treatment system thereof is provided. |
