JPS5931358Y2 - Sewage treatment equipment using rotating cylinder - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for biologically treating wastewater such as factory wastewater using a rotating cylinder, and in particular, it uses two different types of treatment for wastewater: aerobic treatment and anaerobic treatment. The present invention relates to a device capable of performing the following steps.

Conventional treatment methods for this type of treatment equipment using a rotating cylinder include an external immersion type in which the outer peripheral surface of the rotating cylinder is brought into contact with wastewater, an internal immersion type in which the inner peripheral surface is brought into contact with wastewater, and a rotary cylinder in which a porous material such as a wire mesh is used. There are three types: external immersion type and internal immersion type, in which the outer peripheral surface and inner peripheral surface are brought into contact with wastewater at the same time.

The former two types of treatment methods, external immersion type and internal immersion type, can only perform either aerobic treatment or anaerobic treatment; in order to perform both treatments, anaerobic treatment must be performed after the aerobic treatment equipment It is necessary to add an aerobic treatment device or an aerobic treatment device after an anaerobic treatment device, which is a big waste of space and often causes significant inconvenience in selecting the installation location. It is.

On the other hand, the situation is the same for external immersion and internal immersion coexistence type treatment methods as it is limited to either aerobic treatment or anaerobic treatment, but especially in this method, the meshes become clogged during use. In this case, the inside of the cylinder becomes relatively anaerobic, resulting in a situation where aerobic treatment and anaerobic treatment can be performed in one device.

However, in this method, since aerobic bacteria and anaerobic bacteria coexist, they interfere with each other, deteriorating the suitable survival conditions for both, and causing a significant drop in treatment efficiency.

Therefore, the present invention adopts a single-tank configuration with a single treatment device that occupies less space, while clearly separating the aerobic treatment zone and anaerobic treatment zone and maintaining high treatment efficiency in both. The purpose is to propose new and useful technologies.

Next, embodiments of the present invention will be described based on the drawings.

Figure 1 shows an example of this. 1 is a treatment tank placed in an aerobic atmosphere (in the atmosphere), and untreated sewage is supplied to the - side.
A supply pipe 2 serving as a supply port is provided, and a discharge pipe 3 serving as an outlet for discharging treated wastewater out of the tank is connected to the other side.

Further, a discharge pipe 5 with a discharge valve 4 is connected to the bottom of the treatment tank 1, so that the sludge accumulated at the bottom can be appropriately discharged.

6 is a hollow rotary cylinder whose outer peripheral surface 6a is semi-submerged in the wastewater A stored in the treatment tank 1, and has seals 9 slidably attached to hollow rotary shafts 7 and 8 fixed at both ends. , 10, the inside of the cylinder 6 is sealed and maintained in an anaerobic atmosphere.

In addition, a supply pipe 11 as a sewage supply port and a discharge pipe 12 as an outlet are inserted through the rotary cylinder 6 through the seals 9 and 10.

The supply pipe 11 of both is connected to the discharge pipe 3 of the treatment tank 1 via a pump 13.The rotating cylinder 6 is made of synthetic resin material such as vinyl chloride or rust-proof metal such as stainless steel. It is constructed so that it can be divided into two for convenient internal inspection and maintenance.

In the figure, 14 is a rotary drive shaft, and a gear 15 at the end thereof.
is meshed with a gear 16 attached to the rotating shaft 8 to transmit rotational power to the rotating cylinder 6.

Reference numeral 17 denotes an exhaust pump 18, which only discharges the decomposed nitrogen gas generated within the cylinder 6, and is connected to a check valve 19 to prevent air from flowing into the cylinder 6.

According to this configuration, the wastewater is supplied from the supply pipe 2 → the treatment tank 1 → the discharge pipe 3 → the pump 13 → the supply pipe 11 → the inside of the rotating cylinder 6 →
During this time, the treatment tank 1
and undergo different biological treatments within the rotating cylinder 6.

That is, in the treatment tank 1, the aerobic bacteria grown on the cylinder outer circumferential surface 6a in an aerobic atmosphere are brought into contact and subjected to aerobic biological treatment, and in the rotary cylinder 6, the cylinder inner circumferential surface 6b is in an anaerobic atmosphere.
undergoes anaerobic biological treatment by coming into contact with anaerobic bacteria grown on

In this case, since the inside of the treatment tank 1 and the cylinder 6 are completely insulated by the cylinder wall, aerobic bacteria and anaerobic bacteria are separated, and the wastewater is treated with a unique high treatment efficiency that does not interfere with either. be.

In this configuration, the processing tank 1 is placed in an aerobic atmosphere and the inside of the rotating cylinder 6 is kept in an anaerobic atmosphere. However, the present invention is not limited to this, and the processing tank 1 is placed in an anaerobic atmosphere. However, the inside of the rotating cylinder 6 may be kept in an aerobic atmosphere.

Furthermore, the direction in which the wastewater flows may be completely opposite to the above configuration, such as from the inside of the rotary tube 6 to the treatment tank 1.

In addition, for example, as shown in FIGS. 2 to 4, a disk 20 is fixed to the outer circumferential surface 6a of the rotating cylinder 6, or a donut-shaped partition plate 21 is attached to the inner circumferential surface 6b.・Fix the disk 20... to the outer circumferential surface and the partition plate 21... to the inner circumferential surface 6b, respectively, to increase the surface area of the outer circumferential surface 6a, the inner circumferential surface 6b, or both the inner and outer circumferential surfaces. The processing capacity may be increased by increasing the processing capacity.

In this case, if the diameter of the hole in the center of the partition plate 21 on the side near the rotating shaft 8 where the waste water supply port is made small as shown in the figure, the waste water will flow through the partition plate 21... This is even more convenient because it gradually moves to the left while overflowing.

Also, instead of the disk 20..., the partition plate 21...
As shown in FIGS. 5 and 6, recesses 22 and convex portions 23 may be alternately formed on the circumference of the rotary cylinder 6 to increase the surface area of the inner and outer peripheral surfaces of the cylinder. good.

In particular, as shown in FIG.
A ring 25... is rotatably provided in the ring 25...
If the chains 26 are allowed to hang down from the convex portions 23 toward the convex portions 23, it is possible to prevent the convex portions 22 from being clogged with excess biofilm that has grown, which is more convenient.

In summary, the sewage treatment device using a rotating cylinder according to the present invention includes a treatment tank placed in an aerobic or anaerobic atmosphere, an outer circumferential surface of which is immersed in the treatment tank in a semi-submerged state, and a hollow interior that is immersed in the treatment tank. A rotary cylinder maintained in an atmosphere different from that of the tank, and a sewage supply port of the treatment tank and a sewage outlet in the rotary cylinder, or a sewage outflow port of the treatment tank and a sewage supply port in the rotary cylinder. are connected in series, and by flowing wastewater through the pipes, aerobic and anaerobic biological treatments, which are contradictory to each other, can be performed in two clearly separated zones within the same device: the treatment tank and the rotary cylinder. be able to.

Therefore, the troublesome situation of coexistence of aerobic bacteria and anaerobic bacteria that was observed in conventional external immersion and internal immersion coexistence type equipment is prevented, and both aerobic treatment and anaerobic treatment can be performed with unique high processing efficiency. I can do it.

Furthermore, although these contradictory processes are carried out within the same device, it occupies the same amount of space as a simple external immersion type processing device, so it can be used in narrow spaces with limited space. It also has the advantage of being easy to install.

[Brief explanation of the drawings] The figure illustrates a sewage treatment device using a rotating cylinder according to the present invention.
FIG. 1 is an overall front sectional view showing one embodiment of the invention, and FIGS. 2 to 6 are front sectional views showing other embodiments of the present invention. 2...
... Supply port, 3 ... Outlet, 6 ... Rotating tube, 11 ... Supply port, 12 ... Outlet.

Claims (1)

[Scope of utility model registration request] comprising a processing tank placed in an aerobic or anaerobic atmosphere, and a rotating cylinder whose outer peripheral surface is immersed in the processing tank in a semi-submerged state and whose hollow interior is maintained in an atmosphere different from that of the processing tank,
A sewage treatment device using a rotary cylinder, in which the sewage supply port of the treatment tank and the sewage outlet in the rotary cylinder are connected in series, or the sewage outflow port of the treatment tank and the sewage supply port in the rotary cylinder are connected in series.