JPS6254072B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a septic tank for urine and sewage that is difficult to treat. Conventionally, as shown in Fig. 1, a septic tank for human waste sewage includes a separation chamber A for separating solid matter in the human waste water, a aeration system for the human waste water flowing out from the separation chamber A,
Aeration chamber B that performs treatment with aerobic bacteria;
It is generally known to have a sedimentation chamber C for precipitating suspended matter such as exfoliated sludge in the treated water flowing out from the sedimentation chamber C, and a disinfection chamber D for disinfecting the treated water flowing out from the sedimentation chamber C and discharging it to the outside. . This type of sewage septic tank normally treats the discharged sewage almost completely and purifies it to the extent that it can be discharged to the general sewer system, but human waste sewage is difficult to treat sewage. In some cases, especially in the case of diabetic human waste or human waste sewage containing pharmaceutical components such as vitamins and antihypertensive agents, the components contained in human waste may not be completely treated and may not meet the discharge standards. It was hot. In view of the above-mentioned problems, the present invention was made for the purpose of providing a septic tank that can sufficiently purify even human waste water, which is difficult to treat.
A septic tank with an inlet, where the inflowing human waste water is allowed to stand still and putrefied by anaerobic bacteria, and an alkaline content (or acid content) is added to the human waste waste water flowing out from the septic tank to adjust the pH. A filter device, a water injection device for diluting the human waste water flowing out through the filter device, a contact aeration chamber for aerating the diluted human waste water flowing out and treating it with aerobic bacteria, and a contact aeration chamber for dispersing the diluted human waste water flowing out and treating it with aerobic bacteria; It is characterized by consisting of a settling chamber for settling floating matter such as exfoliated sludge in the treated water, a disinfection chamber for disinfecting the treated water flowing out from the settling chamber, and an outlet provided in the disinfection chamber. . Next, the present invention will be explained using examples. FIG. 2 is a conceptual diagram showing a cross section of an embodiment of the present invention, and FIG. 3 is a cutaway perspective view of essential parts of one embodiment. A septic tank 1 for hard-to-treat night soil sewage according to the present invention has an inlet 2 through which the night soil sewage flows in, and a septic tank 3 in which the inflowed human waste sewage W is allowed to stand still and rotted by anaerobic bacteria, and this septic tank. A filter device 4 consisting of, for example, a mesh container containing limestone and oyster shells 4A is added to the human waste water flowing out from the filter device 4 to adjust the pH by adding alkalinity (or acid content) to the wastewater flowing out from the filter device 4. A water injection device 5 that dilutes human waste wastewater, a contact aeration chamber 6 that aerates the diluted wastewater and treats it with aerobic bacteria, and the contact aeration chamber 6
A sedimentation chamber 7 for precipitating suspended matter (not shown) such as exfoliated sludge in the treated water flowing out from the sedimentation chamber 7, a disinfection chamber 8 for disinfecting human waste water flowing out from this sedimentation chamber 7, and a drainage provided in this disinfection chamber 8. It consists of an exit 9. In the above embodiment, as for the inflow pipe 2A that flows the wastewater into the septic tank 3, in order to prevent air from being mixed into the wastewater in the septic tank 3 as much as possible, the lower end of the pipe 2A is inserted into the wastewater as shown in the figure. The opening is set at a deep position so that air bubbles generated when wastewater flows into tank 3
It is desirable to prevent it from spreading widely within the country. In addition, in order to ensure that the treatment inside the septic tank 3 is carried out,
As shown in the figure, it is desirable that the inside of the septic tank 3 be partitioned into several parts by partition walls 3A so that the sewage can be advected in stages as indicated by arrows P. Next, the operation of the embodiment of this invention will be explained. In the septic tank 3 into which difficult-to-treat human waste water (in the case of diabetic human waste) flows, it is difficult to supply oxygen to the waste water, and the human waste water is allowed to stand still, so the carbohydrates contained in the waste water are Anaerobic bacteria thrive on the ingredients, etc. as their favorite food, and the carbohydrate components, etc. are decomposed by the anaerobic bacteria. However, when decomposition by the above-mentioned anaerobic bacteria occurs, the PH degree of the wastewater is abnormally lowered due to sugars, organic acids, etc. in the wastewater, and the BOD value also becomes extremely high. Since this is inconvenient for the subsequent decomposition treatment by aerobic bacteria, the wastewater is advected to the next tank via the filter device 4 in order to increase the pH value. With this filter device 4, the pH level of the waste water is 4.
It can be raised to about 7. In particular, PH control is more effective when aeration is performed from the bottom of the filter device (not shown). Furthermore, this wastewater is diluted by the water injection device 5 and then transferred to the next aeration chamber 6.
is advected to. With this water injection, wastewater is reduced to BOD
The load is optimized and processing in the next tank is facilitated. In the contact aeration chamber 6, air is sufficiently supplied to the wastewater by bubbles ejected from the aeration chamber 6A, and organic components in the wastewater are decomposed by aerobic bacteria grown here. Note that a contact material 6B in the form of a honeycomb, a net, etc. is arranged to help the growth of aerobic bacteria and aerobic microorganisms in the aeration chamber 6, and to rectify and circulate the flow of wastewater in the tank. At this point, the organic components in the wastewater have been decomposed by both anaerobic and aerobic bacteria. Next, the treated water is allowed to stand still in the settling chamber 7 again, and suspended matter such as exfoliated sludge contained in the treated water is sedimented and removed. The above-mentioned floating matter is mainly a detached body of biofilm grown in the contact aeration chamber 6. The treated water is finally disinfected in the disinfection chamber 8 and discharged to the outside through the discharge port 9. The above embodiment has been shown in the case where the necessary chambers as the septic tank 1 were integrated from the beginning, but
Regardless of this, even a conventional septic tank as shown in FIG. 1 can be used as the difficult-to-treat septic tank of the present invention. That is, FIG. 4 shows a sectional view of another embodiment, in which the separation chamber A in the conventional septic tank 1',
and aeration chamber B are respectively used as septic tanks 3, 3, limestone, oyster shells, etc. are stored in sedimentation chamber C and used as a filter device 4, disinfection chamber D is used as a water injection tank, where a water injection device 5 is provided, and a discharge port is provided. 9 is connected to the inlet of another conventional septic tank 1'', and aeration processing is performed by this septic tank 1''. Furthermore, as shown in Fig. 5, the conventional septic tank 1'
The entire structure is used as a septic tank 3, and a filter device 4 for adjusting pH, a control tank 45 that is integrally equipped with a water injection device 5, and a contact aeration type septic tank 1 are connected in order to the outlet of this septic tank 1'. The same applies even if the By the way, when the purification performance of the septic tank according to the present invention and a conventional type septic tank was compared, the results shown in the table below were obtained. Types of human waste sewage 1 The sugar in the urine is 4 to 10 times the normal value 2 The viscosity of the urine is higher than normal 3 The specific gravity of the urine is large 4 The acetone body and creatine are higher than the normal value The above human waste sewage The water quality of the effluent after purification was examined by flowing it into the septic tanks of the present invention and the conventional type.

[Table] As is clear from the above, the difficult-to-treat human waste sewage septic tank of the present invention can handle carbohydrate components or other chemical components, which were conventionally difficult to completely treat.
Treatment is possible through the action of anaerobic bacteria, and the water quality characteristics of the wastewater change at this time, so that the pH and concentration are optimized for easy subsequent treatment, so treatment can be performed reliably and quickly. be. Moreover, since it can be carried out by combining conventionally used septic tanks, it has the advantage of being easy to carry out.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is a conceptual diagram of an embodiment of the present invention, Fig. 3 is a cutaway perspective view of the main part of the embodiment, and Figs. 4 and 5 are cross sections of other embodiments. It is a diagram. 1... Septic tank for difficult-to-treat urine sewage, 2... Inlet, 3
... Septic tank, 4... Filter device, 5... Water injection device,
6...Aeration chamber, 7...Sedimentation chamber, 8...Disinfection chamber, 9...Outlet.

Claims (1)

[Claims] 1. A septic tank with an inlet, where the inflowing human waste water is allowed to stand still and rotted by anaerobic bacteria, and an alkaline content (or acid content) is added to the human waste waste water flowing out from the septic tank to adjust the pH. a filter device to
A water injection device that dilutes the human waste water flowing out through the filter device, a contact aeration chamber that aerates the diluted human waste water that flows out and treats it with aerobic bacteria, and separation in the treated water that flows out from the contact aeration room. A septic tank for difficult-to-treat urine sewage characterized by comprising a settling chamber in which suspended matter such as sludge is settled, a disinfection chamber in which treated water flowing out from the settling chamber is disinfected, and an outlet provided in the disinfection chamber.