JPS58180294A - Device for treating sewage - Google Patents

Abstract

PURPOSE:To treat sewage contg. org. matter without dilution and without chemical feeding, by performing half-batch treatment operation by the endless cycle of inflow of raw water, aeration, settling and releasing of supernatant liquid in each of many treatment tanks. CONSTITUTION:Raw material is charged through a feed port 1 into a sewage receiving tank A while the flow rate thereof is measured with a flowmeter 2. Extraneous matter is separated by settling in the tank A, whereafter the raw water is pumped 4 into the 1st treatment tank B1. Aerators 5 are installed in the tanks B1, B2 and air is fed from a blower 6. The sewage is aerated by this air and is treated aerobically by an activated sludge method, whereby COD and BOD are removed and the ammoniac nitrogen in the inflow sewage is nitrated. When the aeration is stopped, the convection in each tank ceases and the activated sludge is separated by settling. The dissolved oxygen in the tank is nitrated to anaerobic nitrogen, by which a denitration effect is generated.

Description

[Detailed Description of the Invention] This invention is designed to circulate and reuse wastewater in aircraft, from human wastewater with antifreeze added, other raw human waste, food processing wastewater, high ammonia wastewater and high degree organic wastewater from accumulated water. The present invention relates to a wastewater treatment device.

Conventionally, in the treatment of sewage made of high-grade organic wastewater, aerobic treatment using the activated sludge method, anaerobic treatment using a digestion tank, and dilution treatment are performed using separate systems such as an aeration tank, a digestion tank, and a dilution tank. It is generally performed using oak, and is complex and often requires the priest's extensive equipment and land, as well as large amounts of chemicals and a large number of technicians.

However, the purpose of this project was to provide a device that can heat aircraft wastewater using AM without any personnel, without dilution, and without chemical injection using very simple equipment. Let's explain by example.

First, to explain the ** of the apparatus of this invention, as shown in Figures 1 to 4, there are sewage tank A1, first treatment tank B1,
, No. 2 Hinoki Cypress B2, the number of tanks was increased as necessary to 5th and 4th processing tanks, and a discharge tank C was installed, and impurities such as paper and sand were separated by sedimentation in the sewage receiving tank M. Raw water &
Tank Bj.

The sewage is mixed with activated sludge by aeration and subjected to aerobic treatment, and BOD and COD are decomposed and removed. In addition, the inflow MH4-M undergoes nitrification and oxidation and changes into io; -M, No, and -N.

Next, when aeration is stopped, convection subsides, activated sludge and treated water gradually separate, dissolved oxygen in the tank gradually decreases, and the process shifts to anaerobic treatment, that is, reduction. It becomes an inert gas due to nitric acid retardation, and the denitrification effect is achieved.

Supernatant water is discharged into the discharge tank 0 by the sludge settling and collecting device, and raw water is caused to flow into the stations 1111B1, . . . in the amount of the discharged water. The oxidation and reduction treatment plant is then operated in a semi-batch manner through an endless cycle of raw water inflow, aeration, precipitation, and supernatant water discharge. In addition, the raw water substrate,
Each treatment tank Bj, B2, etc. is used in series or in parallel depending on the time, and the operating status is g5.
As shown in #A, Figure 5 is series operation, Figure 5 is B.
indicates parallel operation, and Fig. 5 0 indicates combined series and parallel operation. 6wJ to FIG. 8 show an example of the invention which has been implemented as a variant example and which has been put into practical use.

Raw water passes through an inlet 1 and is metered by a flowmeter 2 into the wastewater receiving tank. Reference numeral 5 indicates a manhole. Impurities are separated by sedimentation in this sewage receiving tank M, and then the raw water is sent to the first treatment tank B1j by the raw water pump 4.

Each processing tank B1. Each B2 has an aerator at the bottom.
5 is installed, and air is sent from a blower 6.

#! There is an overflow weir 7 on the wall between the first treatment tank B1 and the second treatment tank B2, and the treated water from the first treatment cypress B1 flows over this overflow weir 7 into the second treatment tank B2. do.

In the case of parallel sensitive layers, the second processing layer B2 is supplied by the circulation pump 8.
The treatment solution is circulated to Jl111 treatment oak B1.

Note that each processing tank B1. The amount of inflow into B2 differs depending on the inflow sewage concentration number, but it is sufficient as long as it is approximately 115 or less of the amount of hinoki and the product of the dilute concentration and water amount is within the BOD volumetric load amount.

By sending air from the blower 6, the sewage is aerated and subjected to aerobic treatment using the activated sludge method, resulting in BOD, OO
D, etc. are removed, and ammonia nitrogen in the inflowing wastewater is oxidized by nitrification. The amount of oxygen introduced varies depending on the substrate of the inflowing sewage, but 0 OK4/BODK4 is 2 to IW4/4.
and the aeration time is 2H to 221 hours.

Next, when aeration is stopped, the convection within each tank subsides, and the activated sludge separates and settles. Dissolved oxygen in the tank is nitrified and becomes anaerobic, producing a denitration effect. Each treatment tank IN, B2 or second tank 11111B2 is equipped with a water collection device 9 whose upper end opening can be adjusted up and down, and after anaerobic treatment and sludge has settled, the water collection device 9 discharges clear water into the discharge tank. , and then raw water is introduced.

This invention consists of the above-mentioned structure, and a semi-batch treatment operation is performed in each cypress in a large number of same treatment tanks through an endless cycle of raw water inflow, aeration, precipitation, and supernatant water discharge, and aerobic treatment and anaerobic treatment. Each treatment measurement is equipped with an overflow weir, a circulation pump, and a water collection device, so you can freely change the transfer flow path between each treatment tank in series, parallel, or An operating formula for those combinations is selected.

In addition, with extremely simple treatment facilities, highly aerobic wastewater with a high ammonia concentration of 200 to 20,000 tons can be treated without dilution and without chemicals, which is difficult to remove with conventional wastewater treatment methods. Nitrogen removal rate is also 75-9
0914 degrees possible. In addition, program operation using a sequencer is possible, allowing for complete automatic operation, which greatly increases the operator's luck.

[Brief explanation of drawings]

Figures 1, 2, 5 and 4m are drawings showing the outline of the apparatus of the present invention, Figures 58 (IL), (1)), (
0) is a block diagram of the operating system, and FIGS. M...Sewage receiving tank, Bl, B2...Treatment tank, 0...Discharge tank, 1--Input port, 2...Flow rate needle, 5...Manhole, 4
...Raw water pump, 5.. Aerator - 16-. Blower, 7.. Overflow weir, 8.. Calculation pump, 9.. Water collection device, 10.. Overflow weir. Figure 1 Figure 2 Figure 3 Figure 4 Continued from page 1 0 Inventor: Susumu Shiraki, Mitsui 2nd Annex, Shin Nippon Air Conditioning Co., Ltd., 4-2, Nihonbashi Hongocho, Chuo-ku, Tokyo Applicant: Hiroshi Kishi Mitsui 2nd Annex, 1-9-10-02 Yushima, Bunkyo-ku, Tokyo

Claims (1)

[Claims] (1) Following the sewage receiving tank that separates contaminants, a number of identical treatment tanks each equipped with an aerator are placed, and an overflow weir and circulation pump are placed between each treatment tank to separate the contaminants. The raw water from which substances have been removed flows into the treatment tank, and after aerobic heat treatment in each of the heat tanks, the aeration is stopped to allow activated sludge to settle, and nitrification and denitrification are carried out in each of the heat tanks. The heat treatment tanks can be used in series or in parallel by changing the raw water supply, discharge, and transfer flow path between each treatment tank depending on the substrate concentration, and the A sewage treatment device characterized by being equipped with a water collection device for discharging separated supernatant water.