JPH03242294A - Biological treating device for sewage using floating filter medium - Google Patents

Abstract

PURPOSE:To reduce a running cost by mechanically loosening the filter media solidified with microorganisms or suspended solids by segmented filter chambers and the stirring vanes provided in the respective filter chambers, peeling deposits. CONSTITUTION:The filter chambers 2 are segmented and formed in a main body 1 and the stirring vanes 7 are respectively provided in the respective filter chambers 2; therefore, the solidified floating filter media 6 can mechanically exactly and uniformly by loosened. The suspended solids clogged in the filter medium layers and the old living membranes sticking to the surfaces of the filter media are thereby peeled. These solids and membranes are separated by washing with the raw liquid and aerating air injected into the chambers and the surfaces of the filter media are activated and the filter medium layers are regenerated. Since devices for intermitting driving power are provided respectively in the transmission systems of the stirring vanes 7, the successive washing and regeneration of the filter media in the respective filter chambers 2 by using timers, etc., and the washing and regenerating based on the pressure fluctuation in the respective filter chambers 2 are possible. The filter media are light and the driving power is not required for the regeneration of the filter media according to this method.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an apparatus for filtering sewage, industrial wastewater, etc. containing organic matter using a flotation filter and at the same time biologically treating the same.

[Conventional technology]

Conventionally, it has been known to attach aerobic bacteria to a flotation filter medium, perform biological treatment while supplying air, and simultaneously separate suspended matter in a stock solution.

A known technique of this type is Japanese Patent Publication No. 56-6324.

[Problem that the invention seeks to solve]

In the above-mentioned Japanese Patent Publication No. 56-6324, the stock solution to be treated is supplied from above the processing tank and passed through a flotation filter medium, and at the same time, it is treated by microorganisms attached to the flotation filter material, and at the same time, floating matter in the stock solution is removed. Although it is stated that aeration is performed to activate microorganisms, the stock solution is supplied as a downward flow into the floating filter medium, and the suspended matter is captured by the filter medium and coarsely granulated, and only the suspended matter is separated and taken out. It is difficult 0
In particular, when the treatment tank is large, microorganisms and suspended matter adhering to the flotation filter medium cannot be removed by stirring because the filter medium is lightweight and cannot be removed by conventional agitation by flowing down the stock solution. Further, even if a stirring blade is provided, the entire filter medium cannot be uniformly stirred, and neither peeling nor aeration can be uniform.

[Means for solving problems]

This invention solves the above-mentioned problems, and the gist of the invention is to partition a horizontally suspended main body formed into a cylindrical or prismatic shape, and to provide a supply port for the stock solution at the top. , several filtration chambers each having an outlet for treated water at the bottom are formed, these filtration chambers are filled with flotation furnace material, and stirring blades are respectively provided facing the lower surface of these flotation furnace material layers. The drive shafts of the stirring blades are interlocked and connected to the prime mover, and furthermore, a power intermittent device for the power to the stirring blades is provided in the transmission path from the prime mover to each stirring blade.

[Effect]

In this invention, the filtration chambers are divided and each filtration chamber is provided with a stirring blade, so that furnace material solidified by microbial membranes and suspended matter can be mechanically loosened.
These adhered materials can be peeled off. Therefore, by subsequently feeding raw water and aeration air, these can be separated and at the same time the surface of the granular furnace material can be activated.

Hereinafter, the present invention will be specifically explained based on the drawings.

〔Example〕

In Fig. 1, the symbol l is the main body of the filter formed in a cylindrical shape, 2 is the filtration chamber formed inside it, 3 is the supply port for the raw solution, 4 is the screen, 5 is the outlet for the treated water, and 6 is the filtration chamber. room 2
7 is a stirring blade; 8 is a pressure detector provided in each filtration chamber; 9 is a hydraulic motor for rotationally driving the stirring blade; 10 is for driving the hydraulic motor 9; Hydraulic pump, 1 is a prime mover for driving the hydraulic pump, 12 is an electromagnetic opening/closing valve provided in the hydraulic motor circuit, and although not shown, it is linked to a pressure sensor, timer, etc.

FIG. 2 shows an example in which a mechanical mechanism is used to drive the stirring blades 7. Reference numeral 13 is a bevel gear provided on the driving shaft 14, 15 is a bevel binion, and 16 is an electromagnetic clutch. Like the on-off valve, it is controlled by a timer or the like.

The device according to the present invention is configured as described above,
Since the filtration chambers 2 are formed separately in the main body 1, and each of the filtration chambers 2 is provided with a stirring blade 7, the solidified flotation furnace material 6 can be mechanically loosened appropriately and uniformly.

Therefore, it is possible to remove floating matter stuck in the reactor material layer and old biofilm adhering to the reactor material surface, and then wash and separate them with the injected stock solution and aeration air, as well as activating the reactor material surface. , the furnace material layer can be regenerated.

In order to regenerate this furnace material, in the present invention, filtration chambers 2 are provided independently, stirring blades 7 are provided in each of them, and power intermittent devices (electromagnetic Since the opening/closing valve ) is provided, it is possible to sequentially wash and regenerate the furnace material in each filtration chamber 2 using a timer or the like, or to wash and regenerate it based on pressure fluctuations in each filtration chamber 2. Although high-capacity water treatment is possible by operating several filtration chambers 2 at the same time, the motor 11 for cleaning and regeneration only needs to be of low horsepower. [Effects of the Invention] As described above, The device according to the present invention enlarges the biological treatment device using flotation reactor material, which has conventionally been difficult to increase in size, and reduces the running cost by downsizing the required drive machine for regenerating the reactor material. In particular, compared to conventional treatment equipment that uses sand as a furnace material, F# is lightweight and requires no power to regenerate the furnace material, so the benefits obtained in terms of wastewater treatment are significant. It is something.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an apparatus according to the invention, and FIG. 2 is a side view of another embodiment. 1 Main body 2 Filtration chamber 3 Supply port 6 Floating filter medium 7 Stirring blade 11 Prime mover 12 Electromagnetic opening/closing valve 16 Electromagnetic clutch

Claims (1)

[Claims] (1) A main body 1 formed into a cylindrical or prismatic shape and suspended horizontally is divided into several filtration chambers 2 having a supply port 3 for the stock solution at the top and an outlet 5 for the treated water at the bottom. , these filtration chambers 2 are filled with floating filter media 6, stirring blades 7 are respectively provided facing the lower surface of these floating filter media layers, the drive shafts of these stirring blades 7 are interlocked and connected to a prime mover 11, and further, the prime mover This is a biological treatment device for sewage using a floating filter medium, which is provided with intermittent devices 12 and 16 for power to the stirring blades 7 in the transmission line from the stirring blades 11 to each stirring blade 7, respectively.