JP2019058845A5

JP2019058845A5 -

Info

Publication number: JP2019058845A5
Application number: JP2017183625A
Authority: JP
Filing date: 2017-09-25
Publication date: 2020-01-09
Anticipated expiration: 2037-09-25

Claims

A wastewater treatment device,
Anaerobic treatment tank, and a plurality of treatment tanks including an aerobic treatment tank provided downstream of the anaerobic treatment tank,
A partition wall separating the anaerobic treatment tank and the aerobic treatment tank,
A diffuser provided in the aerobic treatment tank,
A transfer pump that transfers the water in the anaerobic treatment tank to another treatment tank different from the anaerobic treatment tank and the aerobic treatment tank among the plurality of treatment tanks,
An advection opening forming unit provided downstream of the aerobic treatment tank and forming an advection opening for advancing water downstream.
With
The partition wall is a plurality of openings that communicate the anaerobic treatment tank and the aerobic treatment tank, and has a plurality of openings including one or more first openings and one or more second openings,
Each of the one or more first openings has a lower end disposed at a position lower than a predetermined reference water level, and an upper end disposed at a position higher than the reference water level,
The one or more second openings are:
A low opening which is an opening having an upper end located at a position lower than the reference water level and lower than any of the upper ends of each of the one or more first openings,
Each of the one or more first openings extends from a position lower than any of the lower ends to a position higher than the reference water level, and the width of the opening at the height of the reference water level is the height of the reference water level. A narrow opening that is an opening smaller than any of the widths of each of the one or more first openings,
Including at least one of
The anaerobic treatment tank,
In the anaerobic treatment tank, the lower end of the one or more first openings and the lower end of the one or more second openings, which is located at a position lower than the lowest end which is the lowest end, A baffle that forms a third opening including the third opening, and communicates with the first opening and the second opening;
An introduction unit that guides water flowing into the anaerobic treatment tank to the anaerobic treatment tank, wherein a lower end of the introduction unit is disposed at a position higher than an upper end of the third opening;
With
The transfer pump has a suction port including a portion disposed at a position lower than the lowermost end,
The size of the advection opening is such that when the amount of inflow water per unit time into the wastewater treatment device is temporarily increased by a peak inflow previously associated with the wastewater treatment device, the advection By limiting the amount of water per unit time to be smaller than the amount of the peak inflow per unit time, the water level of the anaerobic treatment tank and the aerobic treatment tank is temporarily increased. Have been
Wastewater treatment equipment.

The wastewater treatment device according to claim 1,
The transfer pump is an air lift pump,
Wastewater treatment equipment.

  The wastewater treatment device according to claim 1 or 2,
  The another processing tank different from the anaerobic processing tank and the aerobic processing tank is a processing tank provided on the upstream side of the anaerobic processing tank,
  The plurality of processing tanks include a downstream processing tank that is a processing tank on the downstream side of the aerobic processing tank,
  When the transfer pump is referred to as a first transfer pump, the wastewater treatment device includes a second transfer pump that transfers water in the downstream processing tank to the another processing tank.
  Wastewater treatment equipment.