JPS6119835Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that purifies organic sewage through aeration treatment, and that self-extinguishes the sludge generated during the treatment in a closed-circuit manner without discharging it to the outside. This will be specifically explained below based on the attached drawings.

Reference numeral 1 denotes a pollutant decomposition tank, inside which a large number of mesh plate-like aerobic bacteria growth plates 2 are installed obliquely at predetermined intervals and in a certain direction; A horizontal sprinkler pipe 4 in which an upward water fountain hole 3 is bored is fixedly installed.

The upper part of the decomposition tank 1 is connected to the next stage aeration tank 7 through a communication pipe 6 having a valve 5 in the middle.

The decomposition tank 1 and the aeration tank 7 each have a top plate 1a,
7a, and is substantially sealed.

In the aeration tank 7, from the front wall 7a to which the communication pipe 6 is connected to the rear wall 7b,
A large number of vertical sludge adhesion plates 8 made of mesh plates or flat plates are fixedly installed at predetermined intervals so that the upper ends are slightly lower than the water surface and the lower ends are located slightly above the bottom of the adhesion aeration tank 7. A rising path 9 is formed between the second attachment plate 8' and the rear wall 7b.

A vertical fumarole pipe 11 with a large number of fumarole holes 10 is disposed at the bottom of the ascending passage 9.
The upper end of the aeration tank 7 is connected to a blower 13 installed outside the aeration tank 7 through an air supply pipe 12 .

The upper part of the ascending path 9 is connected to the next stage disinfection tank 16 with a water purification pipe 15 having a valve 14 in the middle.
A drain pipe 17 is connected to the disinfection tank 16.

The lower end of the ascending path 9 is connected to the water intake port of a return pump 19 through a return pipe 18, and the discharge port of the return pump 19 is connected to an oxygen dissolution tank 22 through a discharge pipe 21 having a valve 20 in the middle. has been done.

A reverse feed pipe 23 branching from the discharge pipe 21 has a valve 24.
It is connected to the return pipe 18 via an injector type aeration device 25.

The oxygen dissolving tank 22 is for dissolving the air taken in by the aeration device 25 into return water, and the water pipe 27 led out from the bottom of the tank 22 is connected to the valve 2.
6 and a mixer 28, it is connected to the center of the water sprinkler pipe 4.

Further, a waste water pipe 30 having a valve 29 in the middle is connected to the mixer 28 .

In addition, 31 and 32 are exhaust pipes installed through the top plates 1a and 7a of the decomposition tank 1 and the aeration tank 7, respectively.

Next, the operation of the present device having the above configuration will be explained.

The sewage sent from the sewage pipe 30 is mixed in the mixer 28 with return water returned from the water pipe 27 containing a large amount of dissolved oxygen and fine bubbles as described later, and is decomposed via the water sprinkler pipe 4. To the bottom of tank 1,
It is fed almost uniformly.

Then, the organic pollutants in the sewage and returned water, together with air bubbles, sequentially pass through each of the many reticular growth plates 2 that are inclined in a certain direction.
The aerobic bacteria effectively adhere to the substrate and propagate, and a population of aerobic bacteria is formed on the two surfaces of the growth plate.

With the help of a large amount of dissolved oxygen supplied from the water pipe 27, this group rapidly oxidizes and decomposes organic pollutants in the wastewater to purify it, and the surplus sludge is self-digested by the cannibalism phenomenon of aerobic bacteria. be done.

The wastewater that has undergone the primary treatment in this manner flows into the aeration tank 7 via the communication pipe 6.

In the ascending path 9 of the aeration tank 7, oxygen is further supplied to the wastewater by the air ejected from the fumarole pipe 11, and an ascending water flow is generated.

The sewage that has risen after being supplemented with oxygen descends between a large number of attachment plates 8 together with the sewage that flows in from the communication pipe 6.

During this time, the pollutants in the wastewater adhere to the adhesion plate 8, and on the other hand, aerobic bacteria breed on the adhesion plate 8 due to the air blown from the fumarole pipe 11.
Secondary purification of sewage is performed, and excess sludge is self-extinguished.

The treated wastewater passes through a water purification pipe 15 to a disinfection tank 1.
6, sterilized, and discharged from a drain pipe 17.

A part of the wastewater treated in the aeration tank 7 is sent to the oxygen dissolution tank 22 by a return pump 19 via a return pipe 18 .

The discharge port of the return pump 19 is also connected to the water inlet via the aeration device 25, so that the oxygen dissolution tank 22 receives the returned wastewater as well as the aeration device 2.
The air sucked from 5 is also sent together.

In the oxygen dissolution tank 22, the returned sewage sufficiently dissolves oxygen in the air, and the air becomes fine bubbles, which are mixed with the sewage in the mixer 28 and sent to the decomposition tank 1, as described above.

As described above, the sewage flowing in from the sewage pipe 30 is rapidly purified, and the generated surplus sludge is self-extinguished within the device, and either accumulates within the device or is discharged outside the device. That's not a problem, it's convenient.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram schematically illustrating an example of the proposed device;
FIG. 2 is a longitudinal sectional view taken along line A-A in FIG. 1. 1... Pollutant decomposition tank, 2... Growth plate, 3...
Fountain hole, 4...Water pipe, 5...Valve, 6...Communication pipe, 7...Aeration tank, 7a...Front side wall, 7b...Rear side wall, 8...Sludge adhesion plate, 9...Rising path , 10...
... Fumarole, 11... Fumarole pipe, 12... Air pipe, 1
3...Blower, 14...Valve, 15...Water purification pipe,
16...Disinfection tank, 17...Drain pipe, 18...Return pipe, 19...Return pump, 20...Valve, 21...
Discharge pipe, 22...oxygen dissolution tank, 23...reverse feed pipe,
24... Valve, 25... Air mixing device, 26...
Valve, 27... Water pipe, 28... Mixer, 29...
Valve, 30...Sewage pipe, 31, 32...Exhaust pipe.

Claims (1)

[Claims for Utility Model Registration] (a) A large number of net plate-like growth plates 2 are arranged diagonally in a certain direction, spaced apart from each other, and a water sprinkler pipe 4 is provided at the bottom. (b) The front part of the pollutant decomposition tank 1 is connected to the upper part of the pollutant decomposition tank 1, and inside thereof, there are a number of sludge adhesion plates 8 arranged in the vertical direction, spaced apart from each other, and whose upper ends are It is located slightly below the water surface, and the lower end is also located slightly above the bottom surface, and between the rear wall 7b and the rearmost sludge adhesion plate 8', the sewage rises vertically. (c) an aeration tank 7 which is provided with a fumarole pipe 11 connected to a blower 13 in the lower part of the ascending channel; (d) a return pipe 18 that guides a portion of the treated water in the aeration tank 7 to the inlet side of the return pump 19; and (e) an oxygen dissolution tank 22 connected to the outlet side of the return pump 19. (f) A return pipe 23 that branches from the outlet side of the return pump 19, is connected to the middle of the return pipe 18, and is provided with an injector type air mixing device 25 in the middle.
(g) In the oxygen dissolving tank 22, the air taken in by the aeration device 25 is dissolved to produce return water containing fine air bubbles and the waste water pipe 30.
A self-extinguishing type sewage purification device characterized by comprising a mixer 28 for mixing the untreated sewage introduced by the decomposition tank 1 and guiding it to the sprinkler pipe 4 in the decomposition tank 1.