CN105859025A - Domestic sewage dirt-cleaning flow-dividing biological ecological treatment method and apparatus - Google Patents

Abstract

The invention discloses a biological ecological treatment method and device for cleaning and diverting domestic sewage. The domestic sewage is divided into black water and gray water; the black water is anaerobically treated; the gray water is mixed with the anaerobically treated black water Afterwards, denitrification and denitrification and synchronous deodorization reactions are carried out; then the effluent is subjected to aerobic treatment; a part of the effluent after the aerobic treatment is mixed with the black water after the gray water anaerobic treatment for denitrification and denitrification and Synchronous deodorization reaction; the other part enters the garden-style artificial wetland for treatment. The invention divides domestic sewage into black water and gray water for classification and treatment, and the black water with small water volume and high concentration of organic matter enters the high-efficiency folding plate anaerobic reactor, which is beneficial to improve the effect of anaerobic treatment and reduce the volume of the reactor. Then use the garden-style artificial wetland to further treat and purify the water quality to ensure that the water quality meets the national sewage discharge standards. At the same time, it can create good landscape effects and ecological benefits, and build a garden-style sewage treatment unit.

Description

A biological ecological treatment method and device for cleaning and diverting domestic sewage

technical field

The invention relates to sewage treatment engineering technology in the field of environmental engineering, in particular to a treatment method and device for domestic sewage. It is suitable for small-scale decentralized domestic sewage treatment represented by independent residential domestic sewage.

Background technique

In recent years, with the rapid development of my country's economy, environmental problems have occurred frequently, and environmental pollution, especially water pollution, has become increasingly serious. Untreated or improperly treated domestic sewage has become one of the main reasons for the deterioration of water quality in rivers and lakes. At present, there are complete urban pipe network collection and large-scale sewage treatment facilities in large cities, and a relatively mature process system. However, for independent houses and rural areas far away from the city, there are no perfect drainage channels and sewage treatment systems. Most of this small-scale distributed domestic sewage has not been treated, and treatment measures for dephosphorization and nitrogen removal are rarely used. On the other hand, the increasingly serious problem of water pollution has also exacerbated the contradiction of water shortage. my country is a country short of water resources. According to statistics, the annual water shortage reaches 6 billion cubic meters. The average water reuse rate in my country is about 40%, while developed countries The average is 75%~85%.

At present, most of the small sewage treatment facilities at home and abroad adopt the integrated or buried sewage treatment process based on the principles of contact oxidation and membrane separation, and special aeration devices are required, resulting in high energy consumption and difficulties in equipment maintenance. and many other adverse consequences.

Therefore, starting from the current situation and requirements of decentralized domestic sewage treatment, it is very important to develop a bio-ecological combination, high efficiency, economy, landscaping, and gardening, which is suitable for small-scale decentralized domestic sewage treatment processes represented by independent residential sewage. significance.

Contents of the invention

Technical problem: The present invention provides a treatment method and device for domestic sewage, which is suitable for decentralized domestic sewage treatment represented by independent residential sewage. The purpose of reuse of resources and nitrogen and phosphorus resources.

Technical solution: In order to solve the above technical problems, a biological ecological treatment method for cleaning and diverting domestic sewage according to the present invention, the domestic sewage is divided into black water and gray water; the black water is anaerobically treated; the gray water is combined with anaerobic After the treated black water is mixed, denitrification and denitrification and synchronous deodorization reactions are carried out; after that, the effluent is subjected to aerobic treatment; a part of the effluent after the aerobic treatment is mixed with the black water after the anaerobic treatment of the gray water through reflux Carry out denitrification and denitrification and synchronous deodorization reactions; the other part enters the garden-style artificial wetland for treatment.

A part of the flow rate of the effluent backflow after the aerobic treatment is 100-150% of the flow rate of the influent water in the anoxic denitrification deodorization tank.

The black water is anaerobically treated through a high-efficiency folded-plate anaerobic reactor; the denitrification and denitrification and synchronous deodorization reactions adopt anoxic denitrification deodorization tank; the aerobic treatment adopts falling water oxygenation contact oxidation tank ; The garden-style constructed wetland is connected in series with the aquatic vegetable field and the subsurface-flow constructed wetland.

Stirring is used to mix uniformly before the black water is subjected to anaerobic treatment.

A biological ecological treatment device for cleaning and diverting domestic sewage, comprising a high-efficiency folding plate anaerobic reactor, an anoxic denitrification and deodorization tank, a pump, a falling water oxygenation contact oxidation tank, and a garden-style artificial wetland; the high-efficiency folding plate The outlet pipe of the anaerobic reactor is connected with the anoxic denitrification deodorization pond, and the outlet pipe of the anoxic denitrification deodorization pond is connected with the high water tank at the top of the falling water oxygenation contact oxidation pond through a pump; The falling water oxygenation contact oxidation pond is respectively connected with the anoxic denitrification deodorization pond and the garden-style constructed wetland.

The high-efficiency folded-plate anaerobic reactor is provided with a stirrer; the stirrer periodically stirs the flowing black water.

A float level gauge for adjusting the liquid level in the anoxic denitrification deodorization tank is provided in the anoxic denitrification deodorization tank.

The garden-style constructed wetland is a series connection of an aquatic vegetable field and a subsurface-flow constructed wetland, which transforms and absorbs nitrogen and phosphorus nutrients in domestic sewage.

Beneficial effect: compared with the prior art, the present invention has the following advantages:

(1) Black water and gray water are treated separately, and the black water with small water volume and high concentration of organic matter enters the high-efficiency folding plate anaerobic reactor, which is conducive to improving the effect of anaerobic treatment and reducing the volume of the reactor.

(2) Anoxic denitrification and deodorization pool, using the gravity reflux of the effluent of the aerobic unit at a certain reflux ratio, denitrification and denitrification can effectively remove odor-causing substances and odors at the same time, and realize the surface treatment structures without odor and sewage Handle landscaping.

(3) The aerobic unit adopts the method of oxygenation by falling water, no aeration equipment is needed, and only a small sewage pump is needed to lift the sewage, which greatly reduces the energy consumption of oxygen supply, and reduces the difficulty of management, creating a good environment Falling water landscape.

(4) Garden-style constructed wetlands are used for deep treatment and purification of water quality to ensure that the water quality meets the national sewage discharge standards. At the same time, it can create good landscape effects and ecological benefits, and build a garden-style sewage treatment unit.

Description of drawings

Fig. 1 is a schematic diagram of a bio-ecological treatment process for cleaning and diverting domestic sewage from an independent house according to the present invention. A bio-ecological treatment process for cleaning and diverting domestic sewage from independent houses

Fig. 2 is a top view of a bio-ecological treatment process for cleaning and diverting domestic sewage from an independent house according to the present invention.

Among them: 1. High-efficiency folding plate anaerobic reactor; 2. Anoxic denitrification deodorization pool; 3. Falling water oxygenation contact oxidation tank; 4. Garden-style artificial wetland; 5. Aquatic vegetable field; 6. Submerged flow artificial Wetland; 7. Mixer; 8. Float level gauge; 9. Small water pump; 10. High water tank; 11. Anaerobic pool filler; 12. Anoxic pool filler; 13. Flower bed.

detailed description

The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

The main components of the bio-ecological treatment process for cleaning and diverting domestic sewage from independent houses include high-efficiency folding plate anaerobic reactors, mixers, anoxic denitrification deodorization pools, small pumps, falling water oxygenation contact oxidation pools, garden-style artificial wetlands etc.

Black water and gray water in domestic sewage enter different reactor treatment units through diversion. The black water in the domestic sewage is collected through the pipeline and enters the high-efficiency folded-plate anaerobic reactor. There is a mixer in the first compartment of the anaerobic reactor, and the mixer stirs intermittently at regular intervals to evenly mix the mass liquid to ensure efficient and sufficient anaerobic reaction of domestic sewage in the baffle anaerobic reactor.

The gray water in the domestic sewage is mixed with the effluent from the anaerobic reactor and then enters the anoxic denitrification deodorization tank. The flow rate of the liquid is 100-150% of the flow rate of the anoxic denitrification deodorization tank. If the weather temperature is lower, the reflux ratio can be appropriately increased. After mixing, denitrification and denitrification and simultaneous deodorization reactions are carried out. Effectively reduce odor-causing substances and odors. The outlet water level of the anoxic pool is adjusted by the float level gauge. When the outlet water level rises to the pump start level, the small sewage pump starts to pump water, and the outlet water level decreases to the pump stop water level, and the small sewage pump stops pumping.

The effluent from the anoxic denitrification deodorization tank is pumped into the high-level water tank through a small sewage pump, and falls into the first-stage falling water oxygenation contact oxidation tank for aerobic treatment. And through the outlet weir and deflector plate, it will fall into the falling water oxygenation contact oxidation tank at all levels from top to bottom for aerobic treatment. The oxidation pond discharges the remaining sludge regularly, and discharges it into the flower bed on the side of the oxidation pond through the sludge discharge pipe.

The effluent of the last stage of falling water oxygenation contact oxidation tank is adjusted by adjusting the weir plate to adjust the distribution flow ratio, part of which returns to the anoxic denitrification deodorization tank in the front section, and the other part of the effluent directly enters the garden-style constructed wetland treatment unit. The constructed wetland treatment unit connects the aquatic vegetable field and the subsurface constructed wetland in series. The effluent from the aerobic pool flows through the aquatic vegetable field and the subsurface constructed wetland in sequence. The plants and substrates in the constructed wetland transform and absorb nutrients such as nitrogen and phosphorus in the sewage. , deep treatment of the effluent of the biological unit. While meeting the emission standards, it can build a green and good garden landscape effect.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the idea and principle of the present invention shall be included in the protection scope of the present invention within.

Claims (8)

1. A biological ecological treatment method for cleaning and diverting domestic sewage is characterized in that: domestic sewage is divided into black water and gray water; the black water is anaerobically treated; the gray water mixes with the black water after anaerobic treatment Afterwards, denitrification and denitrification and synchronous deodorization reactions are carried out; the effluent is then subjected to aerobic treatment; a part of the effluent after the aerobic treatment is mixed with the black water after the gray water anaerobic treatment for denitrification and denitrification; Synchronous deodorization reaction; the other part enters the garden-style artificial wetland for treatment. 2. The biological ecological treatment method according to claim 1, characterized in that: a part of the flow of the effluent backflow after the aerobic treatment is 100-100% of the inflow flow of the anoxic denitrification deodorization tank. 150% traffic. 3. The biological ecological treatment method according to claim 1, characterized in that: the black water is anaerobically treated through a high-efficiency folding-plate anaerobic reactor; the denitrification and denitrification and synchronous deodorization An anoxic denitrification deodorization pool is used for the reaction; a falling water oxygenation contact oxidation tank is used for the aerobic treatment; an aquatic vegetable field and a subsurface constructed wetland are connected in series in the garden-style constructed wetland. 4. The biological ecological treatment method according to claim 1, characterized in that: before the black water is anaerobically treated, it is evenly mixed by stirring. 5. A bio-ecological treatment device for cleaning and diverting domestic sewage, characterized in that it includes a high-efficiency folding plate anaerobic reactor, anoxic denitrification deodorization pool, pump, falling water oxygenation contact oxidation pool and garden-style artificial wetland The outlet pipe of the high-efficiency folded-plate anaerobic reactor is connected to the anoxic denitrification deodorization tank, and the outlet pipe of the anoxic denitrification deodorization tank contacts the top of the oxidation tank with the drop water oxygenation through a pump The high-level water tank is connected; the falling water oxygenation contact oxidation pond is respectively connected with the anoxic denitrification deodorization pond and the garden-style constructed wetland. 6 . The biological ecological treatment device for cleaning and diverting domestic sewage according to claim 5 , characterized in that: the high-efficiency folded-plate anaerobic reactor is provided with a stirrer; and the stirrer periodically stirs the flowing black water. 7. The biological ecological treatment device for cleaning and diverting domestic sewage according to claim 5, characterized in that: a floating ball for adjusting the liquid level in the anoxic denitrification deodorization tank is provided in the anoxic denitrification deodorization tank liquid level gauge. 8. The biological ecological treatment device for cleaning and diverting domestic sewage according to claim 5, characterized in that: the garden-style constructed wetland is connected in series with an aquatic vegetable field and a subsurface-flow constructed wetland, and the nitrogen and phosphorus nutrients in the domestic sewage are treated. transformation and absorption.