CN108083429B

CN108083429B - Unpowered oxidation ditch sewage treatment system

Info

Publication number: CN108083429B
Application number: CN201711393713.9A
Authority: CN
Inventors: 张凤欢; 马建锋; 王晋; 杨彦
Original assignee: Changzhou University
Current assignee: Changzhou University
Priority date: 2018-03-05
Filing date: 2018-03-05
Publication date: 2020-12-01
Anticipated expiration: 2038-03-05
Also published as: CN108083429A

Abstract

The invention discloses an unpowered oxidation ditch sewage treatment system which comprises a vertical barrel body, wherein the bottom of the barrel body is connected with an inverted cone bottom, the lowest end of the inverted cone bottom is connected with a sludge discharge pipe, a water inlet pipe is fixed on the inner wall of the barrel body, the upper end of the water inlet pipe is higher than the upper edge of the barrel body, the lower end of the water inlet pipe is flush with the lower end of the barrel body, a plurality of mutually staggered partition plates are fixed in the barrel body, the partition plates are obliquely arranged, an included angle of 5 degrees is formed between each partition plate and the horizontal plane, biological fillers are hung at the upper end of the interior of the barrel body 1, a water outlet is formed in the upper end of the barrel body and is far away from one side of the water inlet pipe, the water outlet is.

Description

Unpowered oxidation ditch sewage treatment system

Technical Field

The invention relates to an unpowered oxidation ditch sewage treatment system, and belongs to the technical field of sewage treatment in environmental protection.

Background

With the rapid development of the economy of China, the water environment problem of China is increasingly prominent, and the urban and rural water environment is threatened unprecedentedly. If investigation shows that more than 90% of rural water environment ecology in Yangtze river delta regions loses basic functions, urban and rural river channels are seriously degraded due to pollution and ecological systems, the water quality of the river channels is basically in V-type and poor V-type water quality, most of the river channels are seriously polluted, eutrophicated, anoxic and black, and become odorous, so that severe environmental ecology situation is caused. Therefore, the quality of the discharged sewage is greatly improved, and the bearing capacity of the water body can be greatly relieved.

Domestic sewage is wastewater generated in the daily life process of people, and mainly comprises kitchen wastewater, washing wastewater, excretion wastewater and the like. The domestic sewage quantity discharged by each person in the residential quarter in China is 150-400L every day, and the quantity is closely related to the living standard. The domestic sewage contains a large amount of organic matters, such as cellulose, starch, saccharides, fat protein and the like; also frequently contain pathogenic bacteria, viruses and parasite eggs; chlorides, sulfates, phosphates, bicarbonates, and sodium, potassium, calcium, magnesium, and the like, of inorganic salts. The total characteristics are that the nitrogen, sulfur and phosphorus contents are high, and the malodorous substances are easy to generate under the action of anaerobic bacteria.

The oxidation ditch is an activated sludge treatment system, and an aeration tank of the oxidation ditch is in a closed ditch shape, so the oxidation ditch is different from the traditional activated sludge method in the hydraulic flow state, and is a circulating flow aeration ditch which is connected end to end and is also called a circulating aeration tank. The oxidation ditch is not built by reinforced concrete, but the soil ditch for slope protection treatment is intermittently aerated by water feeding, and in this respect, the oxidation ditch is the technology for treating sewage in a sequential batch mode at the earliest. The traditional oxidation ditch has the defects of large occupied area and unsuitability for being used in areas with tense land.

The invention aims to provide a vertical and energy-saving unpowered oxidation ditch sewage treatment system.

Disclosure of Invention

The invention aims to provide a sewage treatment system with an unpowered oxidation ditch.

The technical scheme adopted by the invention is as follows: the utility model provides an unpowered oxidation ditch sewage treatment system, including a vertical staving, the staving bottom connects at the bottom of the back taper, the bottom termination at the bottom of the back taper connects the mud discharge pipe, the staving inner wall is fixed with an inlet tube, the inlet tube upper end is higher than the staving and goes up along, inlet tube lower extreme and staving lower extreme parallel and level, staving inside is fixed with a plurality of baffles that stagger each other, the baffle slope is placed, baffle and horizontal plane have 5 contained angles, 1 inside upper end of staving has hung the biofilm carrier, in the upper end of staving, one side of keeping away from the inlet tube has the delivery port, the delivery port is less than the top of inlet tube slightly, mud discharge pipe connects sludge pump and extension pipe, be equipped with the choke in.

The device is characterized in that: has the process of aerobic and anoxic to aerobic, small occupied area, good effect, no need of power and a self-flowing process.

Drawings

FIG. 1 is a sewage treatment system with an unpowered oxidation ditch;

Detailed Description

Example 1

Referring to fig. 1, an unpowered oxidation ditch sewage treatment system, including a

vertical staving

1, 1 bottom of staving connects the back taper end 2, the bottom of 2 of back taper end connects

sludge discharge pipe

3, 1 inner wall of staving is fixed with an inlet tube 4, the upper end of inlet tube 4 is higher than 1 upward edges of staving, inlet tube 4 lower extreme and 1 lower extreme parallel and level of staving, 1 inside is fixed with a plurality of baffles 5 that stagger each other of staving, baffle 5 slope is placed, baffle 5 and horizontal plane have 5 contained angles, 1 inside upper end of staving has hung biofilm carrier 6, in the upper end of staving 1, there is delivery port 7 one side of keeping away from the inlet tube, delivery port 7 is less than the top of inlet tube 4 slightly, sludge discharge pipe 3 connects sludge pump 8 and extension pipe 9, be equipped with choke 10 in the middle of inlet tube 4, choke 10 side joint air pipe 11.

During operation, sewage flows in from the water inlet pipe 4 and flows to the bottom of the barrel body 1, when the sewage flows through the throat pipe 10, the fluid generates a pressure difference effect and brings air into the air pipe 11 to increase dissolved oxygen in the sewage, and in the downward movement process, the water pressure is increased, and the oxygen solubility is increased; the sewage flows to the position of the inverted cone-shaped bottom 2, the flow rate is reduced, the particles carried by the sewage can be deposited in the cone of the inverted cone-shaped bottom 2, the sewage flows upwards in a circuitous way along a channel formed by the partition plate 5, and in the flowing process, the sewage performs circuitous movement for a plurality of times to form the degradation effect in the oxidation ditch, the sewage rises to the upper end of the barrel body 1 and contacts with the biological filler 6 hung at the upper end, and is continuously degraded under the action of microorganisms, and finally, the water flows out from the water outlet 7, so that the sewage purification process is completed; the particulate matter of aquatic can deposit on baffle 5, because the baffle has 5 slopes, sedimentary particulate matter can slide down gradually, falls into the cone at last, and the mud in the cone is after gathering more, opens sludge pump 8, discharges mud through extension pipe 9.

When the device is used for treating domestic sewage, the COD removal rate reaches 96.3 percent.

Claims

1. The unpowered oxidation ditch sewage treatment system is characterized by comprising a vertical barrel body (1), wherein the bottom of the barrel body (1) is connected with a reverse taper bottom (2), the lowest end of the reverse taper bottom (2) is connected with a sludge discharge pipe (3), the inner wall of the barrel body (1) is fixed with a water inlet pipe (4), the upper end of the water inlet pipe (4) is higher than the upper edge of the barrel body (1), the lower end of the water inlet pipe (4) is flush with the lower end of the barrel body (1), a plurality of mutually staggered partition plates (5) are fixed in the barrel body (1), the partition plates (5) are obliquely arranged, an included angle of 5 degrees is formed between each partition plate (5) and the horizontal plane, biological fillers (6) are hung at the upper end of the interior of the barrel body (1), a water outlet (7) is arranged at one side far away from the water inlet pipe at the upper end of the barrel body (1), the water outlet (7) is, the middle of the water inlet pipe (4) is provided with a throat pipe (10), the throat pipe (10) is connected with an air pipe (11) in a side mode, and the air pipe (11) is connected with the atmosphere upwards.