CN104193095B - The method of stagewise comprehensive control city river sewage - Google Patents

Abstract

A segmented comprehensive treatment method for urban river sewage, the method is: according to the length of the river and the requirements of the water volume of the river, 3-5 gates are evenly arranged on the river, and the number of gates is 1 or 2 downstream of the river. The water volume of each river is the principle; the technical effects of the present invention are: 1. No need to lay additional pipelines to introduce sewage into the sewage treatment plant, saving sewage treatment costs; 2. The treated water can quickly return to the river and pass through the floating bed plants And other methods to adsorb organic matter in the river can achieve less or no sewage treatment in the later stage.

Description

Segmented method for comprehensive treatment of urban river sewage

technical field

The invention relates to a method for treating urban river sewage, in particular to a segmented method for comprehensively treating urban river sewage.

Background technique

With the development of cities, the population is becoming more and more concentrated, and the rivers in many cities are polluted by domestic sewage, and it is difficult to restore them by planting floating bed plants in the ecosystem. Because the sewage level in urban rivers is serious, animals and plants cannot survive. Therefore, only when After the urban rivers are polluted to a certain extent, the sewage is pumped to the sewage treatment station or directly to the ground. Pumping the sewage directly to the ground just changes the place of the sewage, and seriously affects the groundwater and seriously damages the surface plants. However, the method of pumping to the sewage treatment plant is not only difficult to lay the pipeline because the sewage treatment plant is far away from the river, but also consumes a lot of energy, and some small and medium-sized cities or counties do not have sewage treatment plants, so it is impossible to clean the polluted cities. Effective management of inland rivers. For pumping sewage to sewage treatment plants, the publication number is CN102505660B. River channel sewage collection wells disclose the use of water conservancy to automatically divert sewage to sewage treatment plants. There are several defects in it: 1. The water inlet The size cannot be controlled, and it is not suitable for use in rivers with large water level drops; 2. The sewage interception and collection wells in this river also need pipes to drain the sewage to the sewage treatment plant, which is extremely expensive and difficult to popularize; 3. The recovered sewage enters the sewage treatment plant and occupies Resources of the sewage treatment plant; 4. The treated water that meets the standard cannot enter the river again.

Contents of the invention

The purpose of the present invention is to provide a segmented method for comprehensive treatment of urban river sewage, which solves the defects in the prior art that sewage cannot be treated in the river, and can facilitate later maintenance, improving the survival of severely polluted rivers Animal and plant issues.

The present invention is achieved like this, it is characterized in that method is:

1) According to the length of the river and the requirements of the water volume of the river, 3-5 gates are evenly set up on the river, and the number of gates is based on the principle that one or two gates in the downstream of the river can accommodate the water volume of the entire river;

2) Close one or two downstream gates to form a reservoir, which can store sewage from the entire river, and open other gates on the river to suck all the sewage from the upper reaches of the river into the reservoir downstream of the river. There is a process to treat domestic sewage, in order to achieve the principle of natural growth of animals and plants;

3) While the sewage in the downstream reservoir is being treated, the river channel that drains the sewage will be cleaned of sludge; whether the river channel is cleaned of sludge or the frequency of cleaning depends on the impact of local sludge on water quality;

4) Close the first upstream gate to form the first reservoir, so that the new domestic sewage is stored in the first reservoir, and then open the downstream gate to discharge the treated water that meets the required quality into the river; whether to discharge the downstream sewage according to the water quality requirements Desilting of sludge in reservoirs and sediments after sewage treatment;

5) The water quality after treatment is in the river channel. According to the existing technology, a floating bed is built on the river channel, and one or more biological detoxifiers and biological growth promoters are placed in the water body, which is beneficial to the growth of aerobic bacteria and facilitates the natural means to degrade organic matter in water;

6) The sewage in the first reservoir is treated with the existing technology to meet the water quality requirements for the natural growth of animals and plants; then it is discharged into the river, so that the sewage entering the river will not be too polluted, ensuring Through the natural ecological system to achieve the effect of pollution control.

The gate is composed of a plurality of baffles of the same size, which is convenient for removing the baffles on the gate according to the height of the water level to discharge water.

The technical effects of the present invention are: 1. It is not necessary to lay additional pipelines to introduce sewage into the sewage treatment plant, which saves the cost of sewage treatment; 2. The treated water can quickly return to the river again, and absorb the sewage in the river through methods such as floating bed plants. Organic matter can achieve less or no sewage treatment in the later stage; 3. After the sewage enters the river, the sewage will be treated without affecting other water bodies in the river, and the pollution of the sewage to the river can be effectively alleviated. The sewage river should be treated at least once a year. It can be improved to three-year governance, not only the cost of governance is reduced, but also the urban environment is better.

Description of drawings

Fig. 1 is a layout diagram of the gate of the present invention in a river channel.

Fig. 2 is a structural schematic diagram of the gate of the present invention.

detailed description

As shown in Fig. 1 and Fig. 2, the present invention is realized like this, and method is:

1) According to the length of the inland river in the local city and the water volume requirements of the river channel 1, the gates are evenly set up on the river channel. The number of gates 2 is based on the principle that one or two downstream of the river channel can accommodate the entire river channel water volume; the installation of the gates can be installed in the dry season , the upper side of the gate needs to be widened, and guardrails are installed on both sides of the wide side, so that the staff can remove the baffle of the gate according to the water level and release the water to the downstream; a filter can be installed at the removed baffle to prevent garbage or particulate matter Entering the downstream of the river, the material of the gate can be concrete or anti-corrosion steel;

2) Close one or two gates at the most downstream to form a reservoir, which can store sewage from the entire river, and open other gates on river 1 to suck all the sewage from the upper reaches of the river into the reservoir downstream of the river. Use the existing technology to treat the collected domestic sewage, such as using flocculants and three-dimensional elastic fillers to absorb pollutants, so as to achieve the principle of natural growth of animals and plants;

3) While the sewage in the downstream reservoir is being treated, the river channel that drains the sewage will be drained to clean up the sludge; whether the river channel is cleaned of sludge or the frequency of cleaning depends on the impact of the local sludge on the water quality; the cleaned sludge can be used as fertilizer, and heavy metals The excess sludge needs to be treated separately;

4) Close the first upstream gate to form the first reservoir, so that the new domestic sewage is stored in the first reservoir, and then open the downstream gate to discharge the treated water that meets the required quality into the river; whether to discharge the downstream sewage according to the water quality requirements Desilting of sludge in reservoirs and sediments after sewage treatment;

5) The water quality after treatment is in the river channel. According to the existing technology, a floating bed can be built on the river channel. Canna can be planted on the floating bed, and one or several biological detoxifiers and biological growth promoters can be put in the water body, which is beneficial to the growth of aerobic bacteria. Growth, it is convenient to degrade organic matter in water through natural means, and at the same time, in order to inhibit the growth of algae in the water body, duckweed is planted, and the area of duckweed does not exceed 30% of the water body area;

6) The sewage in the first reservoir is treated with the existing technology to meet the water quality requirements for the natural growth of animals and plants; then it is discharged into the downstream of the river, so that the sewage entering the river will not be too polluted. In the follow-up, the effect of pollution control will be achieved through the natural ecological system itself as much as possible.

The gate is composed of multiple baffles of the same size, which can release water in time according to the water level requirements, and the water level height of the water discharge can be controlled, and reasonable increase of baffles can increase the water storage capacity of the reservoir and facilitate the treatment of sewage .

The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.

Claims (2)

1. A method for segmented comprehensive treatment of urban river sewage, characterized in that the method is: 1) According to the length of the river and the water volume requirements of the river, 3-5 gates are evenly set up on the river. The number of gates is based on the principle that the reservoir formed by closing one or two gates downstream of the river can accommodate the water volume of the entire river; 2) Close one or two downstream gates to form a reservoir, which can store sewage from the entire river, and open other gates on the river to suck all the sewage from the upper reaches of the river into the reservoir downstream of the river. There is a process to treat the sewage, in order to achieve the principle of natural growth of animals and plants; 3) While the sewage in the downstream reservoir is being treated, the river that drains the sewage will be cleaned of sludge; whether the river is cleaned of sludge or the frequency of cleaning depends on the impact of local sludge on water quality; 4) Close the first upstream gate to form the first reservoir, so that new sewage is stored in the first reservoir, and then open the downstream gate to discharge the river water that meets the requirements after treatment into the river channel; The sludge in the downstream reservoir and the sediment after sewage treatment are dredged; 5) The treated river water is in the river course. According to the existing technology, a floating bed is built on the river course, and one or more biological antidotes and biological growth promoters are put in the water body, which is beneficial to the growth of aerobic bacteria and facilitates the passage of natural means to degrade organic matter in water; 6) For the sewage in the first reservoir, the sewage is treated by the existing technology, so as to meet the water quality requirements that animals and plants can grow naturally; then it is discharged into the river, so that the sewage entering the river will not be too polluted, and it is guaranteed to pass through The natural ecological system achieves the effect of pollution control. 2. The method for segmented comprehensive treatment of urban river sewage according to claim 1, characterized in that: the gate is composed of a plurality of baffles of the same size, which is convenient to remove the baffles on the gate according to the height of the water level. Turn on the water.