JPH0724821B2 - Purification device for household wastewater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention can be applied to a relatively small unit of an individual house or an apartment house, and can be used for diluting from a water tank in a kitchen, a bathtub in a bathroom, a washing machine, or the like. In treating all of the domestic wastewater that combines a large amount of wastewater and rich organic matter such as human waste and garbage, the rich organic matter is separated from the wastewater into compost, and the remaining thin wastewater is easily purified, In addition, the present invention relates to a device that performs stable treatment without being affected by fluctuations in drainage from a bathtub, a washing machine, etc. to further purify drainage.

(Prior Art) There is an existing system that collects wastewater from sewerage from a wide area and purifies it at an end-of-life treatment plant, or a combined septic tank installed individually or in a narrow area. In both cases, because concentrated substances such as human waste are mixed and suspended in the wastewater, the purification burden increases, and after purification, the total amount of nutrient salts that dissolves in a large amount of discharged water is large, and the combined septic tank does not have a function to collect excess sludge. The washout is particularly high,
Even a small-scale sewer system has a large amount of runoff due to a simple end-of-life treatment plant. In addition, individual treatment plants cannot handle concentrated drainage from the bathtub, washing machine, etc. due to time zones, resulting in purification failure, and in general, due to the limitation of purification capacity, garbage such as garbage is separately carried out as garbage, which is complicated. Was in a state. In addition, the composting device for organic solids including human waste is particularly fair.
Although it reached the practical range like 3-73281 and Japanese Examined Patent Publication No. 4-51239, it could not be combined with the purification treatment of a large amount of dilute wastewater from bathtubs and washing machines.

(Means for Solving the Problem) In the present invention, organic solids such as human waste and garbage are separated from other wastewater by a net provided at the source, and the separated concentrated organic matter is reduced in quantity by a well-functioning composting tank. Then, it can be easily transported to the outside of the area for purification of wastewater with a reduced purification burden, but since it contains a large amount of dilute wastewater from bathtubs, washing machines, etc., the concentration of dissolved organic matter will be further diluted. The required decomposition amount is small and the temperature rise in the septic tank is very small.Therefore, it is installed separately from the composting tank on the premise of the microbial digestive catalytic oxidation method.
On the other hand, since it is generally accompanied by concentrated drainage depending on the time of day, the septic tank volume should be set to a size that is sufficiently larger than the daily drainage volume, and a fixed amount is pumped out into the septic tank at the bottom with a suction port. Create a storage capacity and take measures to deal with the next concentrated drainage. At that time, it is more preferable to provide an ejector in the process of circulating the purifying tank with a pump to increase the amount of dissolved oxygen for purifying treatment, and to branch a part of it to finish purifying in another purifying tank for discharge. Furthermore, by automatically collecting excess water treatment sludge in the above circulation process, the discharged water is further cleaned, and even when using a flush toilet, the solid content and the liquid content are automatically separated by a net. To do.

(Structure) An embodiment of the present invention will be described with reference to FIG. (1) is a kitchen equipped with a water tank, (2) is a bathroom equipped with a bathtub and a washing machine, (3) is a toilet bowl, and the waste water source is indicated by the three parties.
(4) is a septic tank, (5) is a large surface area membrane plate, (6) is a pump, (7) is a weir, and (5), (6) and (7) are installed in (4), 8) is a pumping pipe, (9) is an ejector,
(10) is an intake pipe, (11) is a conical net, (12) is a conduit, (1
3) is another conduit, (14) (14 ') is a narrow path such as an orifice, (15) (15') is an end opening, (16) is a separation network,
(17) (17 ') is a drain pipe, (18) (18') is a coarse separation network, (19) (19 ') is a water gauge, (20) is a solenoid valve, (21)
Is an alarm device, (22) is another septic tank, (23) is a packed bed in (22), (24) is a sterilizer, (25) is a drain, (1)
After opening from (2) to (15) through (18), (18 ') and (17) (17'), connect them into (4) through (16),
(4) The suction port of (6) is opened in the inner bottom part (8) (9)
It connects to (11) so that it can send water, and then connects to the inside of (4) through (12), (14), (15) and (16) from the cutting surface opening of (11), while the mesh (11) From the outer peripheral surface (14 ') (13) (20)
It connects with (15 '), (23) and (24) and opens to (25).
(26) is a composting tank, (27) is an agitating shaft so that it can work in the whole of (26), (28) is a weir, (29) is an overflow opening,
(30) is a charging chamber, (31) is a fermentation chamber, (32) is a storage chamber, and (26) is divided into two chambers (30) and (31) in (28),
At (29), the two chambers (26) and (32) are connected at the top. (33) is an input pipe, (34) is a push rod, and (33) and the end of the toilet (3) are open-connected to (30).

Next, another embodiment shown in FIG. 2 will be described.
(1) to (33) are the same as those described in the previous embodiment, but the arrangement is slightly different. (35) is an air diffuser, (36) is an air pump, (37) is a water tank, and (38) is Rinse tank, (39) drain pipe, (40) mesh plate, (41) sewer, (42) three-way cock, (43) outlet, (44) auxiliary material tank, (45) It is a rotary valve, and (16) and (18) are absent and (40) is installed instead. In the case of this embodiment, (2) to (18 ') (15)
Via (4) to connect into (4) from the bottom (6) (8)
Connect to (11) via (9), and open from (14), (20) (13) (15 ') (23) (37) (24) through (25) from the outer surface of (11). From the cutting surface of (11), (14) (42)
Via (12), it is connected to the upper side of the starting end (40), from the lower end of the (40) lower side is connected again to (4) via (41) (15), while
The conduits from (37) to (38) (3) (39) and the conduits from (1) to (17) also open to the upper side of the (40) start end and are connected to the (40) upper end and (44). The other end of (45) is opened to the upper part of (30).

Further, a third embodiment shown in FIG. 3 will be described.
(1) to (10), (12) to (15), (17) to (20),
(22), (24) to (34) are the same as those described in FIG. (46) is a partition plate in the septic tank (22), (47) is a large-area membrane plate, (48) and (48 ') are settling tanks provided at the bottoms of the septic tanks (4) and (22), (49) Is a weir separate from (28) provided in the composting tank (26), (50) is a drain of the weir (49), and (5
1) is a check valve, and from (1) and (2) is (18) (1
After going through 7), (18 ') and (17'), open into (4) at (15), and after going through (6), (8) and (9) from the bottom of (4),
Circulation pathway connecting to (4) via (14) (12) (15) and release connecting to (25) via (14 ') (13) (20) (15') (22) (24) The connecting route from (3) and (33) is similar to that of the embodiment shown in FIG. 1, but a pipe connecting from (50) to (51) to (4) is added.

(Operation) The operation of the first embodiment shown in FIG. 1 will be described. A large amount of wastewater, including kitchen waste, flows from the kitchen (1) and bathroom (2), and since the nets (18) (18 ') are coarse, small solids are captured by the net (16) and then the drainage (4) ) Inside, and purify by contact oxidation with the reproductive microorganisms on the surface of the membrane plate (5). A large amount of water is drained from the bathtub or washing machine of the bathroom (2) at a time and the flow rate fluctuates significantly, but a certain small amount is pumped by the pump (6), disinfected at (24) and then discharged from (25), and the tank (4 ) Can be accommodated the next day by forming a storage space inside. When the water level drops to (19), the discharge is shut off at (20), and if the water level reaches (19 ') due to sudden excess inflow into the tank (4), it is excessive due to the alarm at (21). To prevent. On the other hand, large trash collected by the nets (18) (18 ') is sometimes thrown into (33), and the rod (3) is put through the mouth (33).
It is pushed by 4) and put into the chamber (30) of the tank (26), and the excrement of sewage is put into the chamber (30) from the toilet bowl (3).
1) It is fermented and dried in the chamber (30) by intermittent driving to minimize the amount, and successively overflows from the mouth (29) to the chamber (32) and is stored. The catalytic oxidation type septic tank (4) may be any existing type, for example, the membrane plate (5) may be a rotating disk type, but the pump (6)
When the ejector (9) is installed in the pumping process of the above, air is mixed into the mouth (10) in the form of small bubbles to increase dissolved oxygen, and the small particles form a mesh due to the flow velocity along the conical net (11) with a small angle. Part of the wastewater containing solids that flowed to the cutting surface without clogging captures the solids in the net (16) through (12), (14) and (15), and the nets (16) filter the cake. At the same time, it captures even minute solid particles and even the microbial colonization peeling film in the purification process, and when it is full, it takes it out with the net (16) and puts it into the above (33).
Wastewater that has passed through 6) circulates into the tank (4) and wets the membrane plate (5) to continue purification, while wastewater that does not contain solids that has passed through the net (11) has a narrow flow ratio. Road (14) (1
It is regulated by 4 ') and flows in a small amount from (15') to (22). After finishing purification, it is discharged from (25). Next, the second embodiment shown in FIG. 2 will be described. This case is different from the previous embodiment in that the toilet bowl (3) is a flush type, and that the manual type net (16) is replaced with an automatic treatment type net (40). Sewage drops from (1) and (3) as shown by the arrow, and garbage, solid stool, paper, etc. ride on the net (40),
It is pushed out as indicated by the double-lined arrow and automatically charged into the chamber (30), and the auxiliary materials are driven and fed by the (45) from the (44) in a proper amount to mix and ferment it well, dry it to a small amount and store it in the chamber (32). To do. Waste water containing urine and loose stools that have passed through the net (40) is sent from the mouth (41), flows into the tank (4) from the mouth (15) together with the drainage from the bathroom (2), and is pumped by the pump (6). The portion from the ejector (9) that passes through the cutting surface of the conical net (11) is treated as described above by placing the solid content on the net (40) through the (42) and (12), and the water is removed from the mouth (41). The effect of circulating the gas from the tank to the tank (4) to deepen the purification is the same as in the previous embodiment, and sometimes (42) is switched (43).
Sprinkle water from (40) and wash the bottom. Meanwhile, conical net (11)
After passing through the outside surface of (14) and (14 '), the appropriate small amount is used for washing the toilet bowl (3) after finishing purification in the tank (22) and then through (37) and (38). Release from (37) through (24) at (25).

Further, the operation of the third embodiment shown in FIG. 3 will be described. It is almost the same as the first embodiment, but it is shown that the gist of the invention can be achieved without the separating net (16), the conical net (11) and the net plate (40). The septic tanks (4) and (22) settle sludge in the pits (48) (48 ') like ordinary simple septic tanks, so sometimes it is pumped up and put into the pipe (33) and treated in the composting tank (26). To do. There is no alarm (21), but tanks (4) (2
There is a connecting pipe between 2), and in an emergency when the wastewater is temporarily over-supplied by the pump (6) from the tank (4) through the tank (22) to the mouth (25). Evade.

(Effects) The effects of the present invention are summarized as follows.

(1) Rich organic solids such as human waste and food waste are separated by source before mixing with other dilute domestic wastewater, and the solids are composted and used as fertilizers, etc. The dilute and large amount of wastewater after classification greatly reduces the burden of purification treatment.

(2) For the treatment of dilute wastewater that contains a large amount of wastewater from bathtubs, washing machines, etc., and after removing the rich organic solids, a microbial digestive catalytic oxidation method with high purification accuracy and simple equipment is used. Since it can be adopted, the discharged water can be further easily cleaned.

(3) In many cases, intensive drainage from a bathtub or washing machine occurs in a short time, and in the conventional combined treatment tank, there was a defect that sewage was discharged into a short circuit. Purify and discharge one by one, so stable purification without short-circuit flow.

(4) Whereas the conventional combined treatment tank does not have a function of collecting water treatment surplus sludge, in the present invention, since it is possible to automatically collect and compost in the process of pump circulation, the purification accuracy of wastewater is always maintained, Prevent the loss of nutrient salts into the wastewater.

(5) Although flush toilets by laying sewers are aimed at, it is difficult to install them in mountainous areas and scattered rural areas because the laying costs are high, but the present invention can be easily realized at low cost,
Moreover, on the contrary, the purification accuracy is high, and the organic substances can be returned to the soil to contribute to the preservation of the global environment.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a part of an apparatus according to an embodiment of the present invention in a piping diagram, and FIG. 2 is a side sectional view showing a part of a second embodiment in a piping diagram. FIG. 3 is a side sectional view showing a part of the third embodiment in a piping diagram. (Description of symbols) (1) Kitchen, (2) Bathroom, (3) Toilet bowl, (4) Septic tank, (5) Membrane plate, (6) Pump, (9) Ejector, (11) Cone mesh (12) Pipe line, ( 13) Pipe line (16) Separation net, (17) (17 ') Drain pipe (18) (18') Separation net (22) Septic tank, (26) Composting tank (27) Agitation shaft, (29) Overflow Opening (30) Input chamber, (32) Storage chamber (33) Input pipe, (39) Drain pipe (40) Net plate, (41) Sewer

Claims (4)

[Claims] A drainage pipe (17) (17 ') connected to a kitchen (1) a bathroom (2) is connected to a separation network (16) and (18).
It is connected to the septic tank (4) via (18 '), and the septic tank (4) is installed in a volume that is sufficiently larger than the daily drainage volume, and is composed of a microbial contact oxidation system with a large area membrane plate (5). Then, the discharge side partial pipe (13) of the pump (6) having a suction port at the bottom of the septic tank (4) is connected to the drain port (25) and pumped out of the septic tank (4) little by little at a time. , A composting tank (26) with a stirring shaft (27) inside is installed adjacent to the septic tank (4), and an input pipe (33) and a toilet bowl (3) are connected to one end of the composting tank (26). , The above separation network (16) (18) (18 ')
A combined treatment device for household wastewater that allows the above solids to be carried into the input pipe (33). 2. The two pipe lines (12) (13) according to claim (1), wherein the flow ratio is regulated after the ejector (9) is connected to the discharge side of the pump (6). The pipe (12) is connected to the septic tank (4) for circulation, and the pipe (1)
3) is a combined treatment device for household wastewater, which is connected to the drainage port (25) after being discharged through another septic tank (22) and discharged little by little. 3. The device according to claim (2), wherein the ejector (9) and the bottom surface of the conical net (11) are connected in series, and the cutting surface of the conical net (11) is connected to the conduit (12). ) And the conical net (1
Combined treatment equipment for domestic wastewater by connecting the outer surface of 1) to the pipeline (13). 4. The device according to claim 1, wherein the separating nets (16) and (18) are integrated to form a net plate (40), and the net plate (40) is used as a charging pipe (33). ) Installed in the kitchen (1)
The drainage pipes (17) (39) leading to the toilet bowl (3) and the mesh plate (4
The upper end of the mesh plate (40) is connected to the upper end of the mesh plate (40), and the upper end of the mesh plate (40) is opened to the charging chamber (30) of the composting tank (26). ) From the septic tank to the septic tank (4), a combined treatment device for household wastewater.