JPH0358795B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a sewage treatment device, and particularly to a sewage treatment device suitable for treating manure discharged from a pigsty. [Prior Art] Generally, as shown in FIG. 4, a sewage treatment device stores sewage from a sewage source (not shown) in an adjustment tank 41.
The sewage stored in the adjustment tank 41 is pumped up by the pump 42 and flows into the aeration tank 43, and the blower 44 in the aeration tank 43 is operated to supply air and promote bacterial activity. After oxidizing and decomposing the organic matter contained therein, the sewage flows into a settling tank 45, where the sludge is sedimented and separated, and the supernatant water is disinfected and discharged. In this case, since the sludge settled in the settling tank 45 contains a large amount of bacteria that oxidizes and decomposes organic matter in the sewage, it is temporarily transported to the aeration tank 44 again for use. [Problems to be solved by the invention] However, in the above-mentioned sewage treatment equipment, each treatment is performed in separate tanks, such as aeration in an aeration tank and sedimentation separation in a sedimentation tank, so that the entire equipment is Not only did it have the disadvantage of being large and requiring a large installation area, but it also took a considerable amount of time to oxidize and decompose organic matter in wastewater. This invention is intended to solve the above-mentioned problems, and can significantly shorten the wastewater treatment time.
The purpose is to provide a compact sewage treatment device with a small installation area. [Means for Solving the Problem] In order to achieve the above object, the present invention provides an air blower installed outside the tank body within the tank body above the connection port of the sewage inflow pipe connected to the bottom side of the tank body. An air injection pipe is provided which communicates with the air injection pipe through the air injection pipe, and above the air injection pipe, a partition plate consisting of a filter interposed between plastic cardboard boxes having a large number of through holes is installed; In the middle of the tank, a special bacteria supply means is provided that detects the inflow of sewage, takes out powdered special bacteria from the storage tank, and supplies it into the tank body, thereby making it possible to utilize the function of the special bacteria. It is constructed so that oxidation/decomposition and sedimentation separation of wastewater can be carried out in one tank. [Example] The present invention will be described below based on an example shown in FIGS. 1 and 2. In the figure, 1 is the tank body buried underground, 2
is a sewage inflow pipe connected from a sewage source 3 such as a pigsty to the bottom side of the tank body 1. Reference numeral 4 denotes a plurality of air injection pipes provided in the tank body 1 above the connection port 2' of the wastewater inflow pipe 2, and the air injection pipes 4 communicate with a blower 6 via a blower pipe 5. . Air jet holes 4 are placed at appropriate intervals (about 15 cm apart is good) on the bottom side of the air jet pipes 4.
a is provided so that air can be injected toward the wastewater flowing into the tank body 1 from the wastewater inflow pipe 2. Reference numeral 7 denotes a special bacteria supply means disposed in the middle of the blast pipe 5, which detects the inflow of sewage, takes out powdered special bacteria from the storage tank 7a, and supplies it into the tank body 1; The storage tank 7a is connected to the blast pipe 5 through a pipe 7b.The pipe 7b receives a detection signal from a detection means 8 for detecting wastewater flowing from the wastewater source 3 into the wastewater inflow pipe 2. A solenoid valve 7c that opens is provided. The special bacteria used here are called OK bacteria (trade name), and include symbiotic bacteria created by mixed culture technology, a diverse group of useful microorganisms (80 species in 13 genera), and a wide variety of useful microorganisms (80 species in 13 genera). ), an innovative microbial drug synthesis consisting of inorganic components and organic components that are mixed according to the purpose. One of the major characteristics of this OK bacterium is that it exhibits powerful powers unimaginable for pure bacteria due to the so-called symbiosis effect, which is a function that can only be achieved when microorganisms coexist. In other words, from the perspective of ecological utilization of microorganisms, symbiotic effects (increasing the effect of multiplication,
In addition to utilizing
It has enhanced functions as a bacterial group by utilizing synergistic effects of microorganisms (changes in flora, etc.).
In other words, OK bacteria have a strong antibacterial effect against infectious pathogens in food waste and assimilate various organic substances, and the metabolic products and microbial cells themselves produced by their active microbial activity can be used for various purposes. Nucleic acids (adenine, thymine, cytosine, uracil), amino acids (glutamic acid, aspartic acid, threonine, broline, etc.), organic acids,
It contains large amounts of vitamins, hormones, and antibiotics, and has a beneficial effect on food waste. In addition, OK bacteria prefers to assimilate and utilize foul-smelling substances and harmful substances, and they have an excellent composting promoting effect. Furthermore, processed compost contains high-quality metabolites. Therefore, in the natural world, bad odors are hydrogen sulfide, ammonia, mercaptans,
It refers to products that generate large amounts of indole, skatole, volatile amines, etc., and is sufficiently effective in suppressing these. In addition, the microorganisms contained in OK bacteria are yeast, actinomycetes, bacteria, useful filamentous fungi, and chemicals. Reference numeral 9 denotes a partition plate installed above the air injection pipe 4, and the partition plate 9 divides the inside of the tank body 1 into an upper half and a lower half, and allows the material processed in the lower part to pass through to the upper part. belongs to. The partition plate 9 is formed by interposing a filter 9c made of a large number of fibers between plastic cardboard boxes 9b and 9b' having a large number of through holes 9a in the surface direction. The reason why the plastic cardboard boxes 9b and 9b' were used here is because they have a space between the layers where special bacteria can stay, and in consideration of cost.
The purpose of interposing the filter 9c between the plastic cardboard boxes 9b and 9b' is to filter solid content when the material processed at the lower part of the tank body 1 is passed through the upper part, and also to form a hotbed for special bacteria. . In addition, 10 is a discharge pipe for supernatant water (treated water), 11
1 is a sediment removal tube, and 12 is a lid that covers the top of the tank body 1. In addition, in FIG. 1, the bottom of the tank body 1 is inclined from the mouth 2' side of the sewage inflow pipe 2 toward the sediment removal pipe 11. This is to prevent the solid content inside from remaining and to unilaterally collect the precipitate that has settled in the tank body 1. Next, the operation of the above embodiment will be explained. Initially, the tank body 1 is filled with water W, and the blower is operated to send air into the tank body 1. When sewage flows into the tank body 1 from the sewage source 3 through the sewage inflow pipe 2, the electromagnetic valve 7c opens in response to a detection signal from the detection means 9, and special bacteria are injected together with air as shown by arrow A. As a result, the organic matter in the wastewater is efficiently oxidized and decomposed, and after treatment, it rises in the direction of arrow B along with the air containing special bacteria.
It passes through the through holes 9a of the cardboard boxes 9b and 9b' forming the partition plate 9 and the filter 9c and moves upward as shown by the arrow C. A part of the special bacteria remains in the internal space of the partition plate 9 and the filter 9c, and this increases over time and becomes a breeding ground for special bacteria, so the treated liquid that passes through this area is further purified. be done. Therefore, the treated liquid discharged from the upper part of the tank body 1, that is, the liquid taken out from the supernatant water discharge pipe 10 as supernatant water, can be discharged as it is into a river or the like. As a result, solid content gradually settles at the bottom of the tank body 1, but this can be removed from the sediment removal pipe 11 at any time. ◎Example Now, using a prototype of the above-mentioned device, 1 m ³ of human human waste collected from a public toilet was processed. This treatment took three hours from the inflow of human waste until the treated water was taken out as supernatant water. This supernatant water was immediately brought to the Saitama Prefecture Environmental Inspection Research Association for inspection, and the results shown in the table below were obtained.

〔Effect of the invention〕

As explained above, the present invention provides an air injection pipe that is connected to a blower installed in the tank body through a blower pipe in the tank body above the connection port of the sewage inflow pipe connected to the bottom side of the tank body. A partition plate consisting of a filter interposed between plastic cardboard boxes having a large number of through holes is installed above the air injection pipe, and a partition plate is installed in the middle of the air injection pipe to detect the inflow of sewage. It is characterized by the provision of a special bacteria supply means that takes out powdered special bacteria from the storage tank and supplies it into the tank body, so the different treatments of oxidation and decomposition of inflow sewage and sedimentation separation can be carried out in one tank. The device can be made smaller and its installation area can be reduced. In addition, wastewater is effectively oxidized and decomposed using the action of special bacteria, so
Compared to conventional devices that simply aerate with air, this device has various excellent effects such as being able to significantly shorten the treatment time for wastewater.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a schematic cross-sectional view of the whole, FIG. 2 is a partial perspective view of a partition plate, and FIG. 3 is a partial perspective view of a partition plate. The enlarged sectional view, FIG. 4, is an explanatory diagram of a conventional device. 1...tank body, 2...sewage inflow pipe, 2'...mouth, 3...sewage source, 4...air injection pipe, 5...blast pipe, 6...blower, 7...special bacteria supply means, 7
a...Storage tank, 7b...Pipe, 7c...Solenoid valve, 8...Detection means, 9...Partition plate, 9a...Through hole, 9b, 9b'...Plastic cardboard, 9
c...filter.

Claims (1)

[Scope of Claims] 1. An air injection pipe is provided in the tank body above the connection port of the sewage inflow pipe connected to the bottom side of the tank body, which communicates with a blower provided outside the tank body via a blower pipe. ,
A partition plate consisting of a filter interposed between plastic cardboard boxes having a large number of through holes is installed above the air injection pipe, and in the middle of the air injection pipe,
A sewage treatment device comprising special bacteria supply means for detecting the inflow of sewage, taking out powdered special bacteria from the storage tank, and supplying the special bacteria into the tank body. 2. The sewage treatment device according to claim 1, wherein the special bacteria is a mixture of symbiotic bacteria, useful microorganisms, and chemicals.