CN112047561A

CN112047561A - Novel ecological stabilization pond is to processing system in black and odorous river course

Info

Publication number: CN112047561A
Application number: CN201910489080.4A
Authority: CN
Inventors: 李海日; 储文涛; 李文峰; 杨静
Original assignee: Beijing Sunward Ecological Environmental Protection Technology Co ltd
Current assignee: Beijing Sunward Ecological Environmental Protection Technology Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-12-08

Abstract

The invention provides a novel treatment system for a black and odorous river channel by using an ecological stabilization pond, which comprises a sewage lifting pump station, an anaerobic pond, a high-efficiency aerobic pond, a sedimentation pond and an aquatic plant restoration ecological pond which are sequentially connected. The system can be transformed by utilizing the current situation pits around the river channel, the infrastructure investment is low, the operation and maintenance cost is low, the operation, maintenance and repair are convenient, the pollution indexes such as COD (chemical oxygen demand), ammonia nitrogen and the like in the water body of the black and odorous river channel are effectively reduced, the transparency of the water body is improved, the content of dissolved oxygen in the water body is improved, and the effluent of the sewage treated by the treatment system reaches the standard of black and odorous which is not required by the building department. The invention is suitable for treating black and odorous watercourses in cities and suburbs.

Description

Novel ecological stabilization pond is to processing system in black and odorous river course

Technical Field

A novel treatment system of an ecological stabilization pond for a black and odorous river relates to the technical field of sewage purification of ecological ponds, in particular to a treatment technology of black and odorous water in the river.

Background

The urban black and odorous water body not only brings extremely poor sensory experience to the masses, but also directly influences the production and life of the masses, and the ' action plan for preventing and treating water pollution ' issued by the state academy proposes a controllability target that the black and odorous water body in the grade of land and above urban built-up areas is controlled within 10% in 2020, and the black and odorous water body in the urban built-up areas is totally eliminated in 2030 '. Urban black and odorous water body remediation has become an important content for local governments at all levels to improve urban living environment, however, as urban water body black and odorous causes are complex and influence factors are many, remediation tasks are very difficult. In the past, the treatment of the black and odorous water body is mainly to pump river water to a sewage treatment plant for treatment, or to spread a microbial inoculum in a river channel to improve the water quality. The problem of higher operating cost also exists in the spreading of the microbial inoculum, and the spreading of the microbial inoculum for treating the river channel has periodicity, needs to be regularly spread for a long time, and cannot achieve the effect of long-term treatment. In the current treatment of black and odorous water, an oxidation pond is a common process. The oxidation pond is a method for treating sewage by utilizing the natural purification capacity of the pond, and organic matters in the wastewater are treated by utilizing the combined action of microorganisms such as bacteria, algae and the like growing in the pond. The oxidation pond for treating the black and odorous water body has the following advantages: the pond can be used as a treatment pond, the structure is simple, the capital cost is low, a complex mechanical device is not needed, the operation cost is low, the maintenance is simple, the large-range fluctuation of the sewage quantity can be borne, and the sludge treatment is not needed. The disadvantages are that the area of the oxidation pond is overlarge, the retention time of the sewage is over 30 days, the treatment efficiency is low, the quality of the effluent water is not easy to reach the standard, and the pond is easy to become smelly and influence the surrounding living environment. Based on the factors, the invention provides a novel ecological pond technology, adopts the measure of ex-situ restoration, utilizes the current situation pit at the periphery of the river channel to carry out reconstruction and construction, adopts various technical measures such as anaerobic technology, aerobic technology, microbial restoration, aquatic plant restoration and the like, realizes low investment and high treatment efficiency, and ensures that the quality of the effluent water reaches the black and odorless standard required by the department of construction.

Disclosure of Invention

The invention mainly adopts the following technical measures:

A. firstly, a sewage lifting pump station is used for taking water from a black and odorous river channel. The sewage lifting pump station is provided with a grid system and an intelligent control system. The grid system intercepts sundries in sewage and prevents the sundries from blocking the sewage pump, the mechanical rake which is manually operated or automatically operated by water level control is arranged on the grid, the sundries intercepted on the grid are regularly or timely cleared, and the sewage lifting pump is guaranteed not to be blocked when water is taken from a black and odorous river channel. The intelligent control system ensures continuous water taking and uniform water flow.

B. The sewage lifted by the sewage lifting pump station firstly enters an anaerobic pond for treatment. The main structure of the anaerobic pond is a reinforced concrete structure, and the pond contains an automatic dosing device, a biological rope filler, a submersible stirrer and the like. The automatic dosing device regularly adds microbial agents such as denitrifying bacteria into the anaerobic pond, the biological rope filler is made of chemical fiber interlaced yarn, and the filler has a large specific surface area due to a spiral looped pile structure, so that the filler has the advantages of easiness in attachment and growth of microorganisms, quickness in film hanging and debugging time saving. Pack and use the support to set up the interval with great ease and hang, use PP, PE ribbon to tie up packing on the support fixed, biological rope external diameter is 45mm, sets up the interval with great ease and is 200 mm. The rapid biological denitrification effect is achieved by the massive attachment and increment of microorganisms such as denitrifying bacteria on the biological rope filler. Simultaneously, a submersible stirring pump is arranged in the anaerobic tank, so that a good water flow state in the tank is kept, and sludge storage and blockage are prevented.

C. The effluent of the anaerobic tank enters a high-efficiency aerobic pond. The aeration structure of the high-efficiency aerobic pond consists of an aeration mechanism consisting of a microporous aeration hose, a main air pipe and a blower. The air blower is arranged on the outer side of the oxidation pond body and is connected with the main air pipe, and the main air pipe is connected with the microporous aeration hose. The microporous aeration hose is arranged at the bottom of the high-efficiency aerobic pond body. The diameter of the microporous aeration hose is 30 to 50mm, and the microporous aeration hose can be a straight pipe, a bent pipe, a spiral pipe, a round pipe or a metal pipe. Micropores are arranged at the periphery of the micropore aeration hose, and the diameter of each micropore is 0.5-2 mm. The air blower conveys air to the microporous aeration hose through the main air pipe, the concentration of dissolved oxygen in water is improved through aeration, the metabolic activity of microorganisms is enhanced, and the system treatment efficiency is improved. In addition, the aeration effect is enhanced by using a waterwheel type aerator, a buoy aerator and the like in a matching way. The compound microbial agent is regularly added in the high-efficiency aerobic pond by using an automatic dosing machine, and the suspension ball filler is used to promote the quick biofilm formation of the microorganisms, so that the treatment system can operate quickly and efficiently. The oxygenated sewage flows through the microorganism attaching carrier at a certain flow velocity, microorganisms in the water attach to the microorganism attaching carrier to grow and form a biological membrane, the sewage is in wide contact with the biological membrane under the state that the aeration equipment does not stop oxygenating and enables the water to flow, and pollutants such as organic matters, suspended matters, ammonia nitrogen and the like in the sewage are reduced under the metabolism action of the microorganisms on the biological membrane. The high-efficiency aerobic pond can quickly improve the dissolved oxygen content in the water body, and simultaneously quickly reduce pollution indexes such as ammonia nitrogen, total phosphorus and the like in the water body through the biochemical action of microorganisms, thereby improving the water quality.

D. And the effluent of the high-efficiency aerobic pond enters a sedimentation pond. The sedimentation pond is internally provided with a sludge reflux pump, the sedimentated sludge is mechanically refluxed into the high-efficiency aerobic pond, and the refluxed sludge is used as a carrier for microorganism adhesion in the aerobic pond.

E. And the effluent of the sedimentation pond enters an aquatic plant restoration ecological pond. The aquatic plants in the aquatic plant restoration ecological pond comprise submerged plants and emergent plants, the submerged plants are selected from vegetation with strong pollution resistance, good removal effect, strong adaptability and vigorous growth, such as waterweed, hydrilla verticillata and eyeweed, and the emergent vegetation is selected from vegetation with strong growth force and good landscape effect, such as reed and iris. Submerged plants such as waterweeds can purify water and prevent water eutrophication. The submerged plant can not only release a large amount of oxygen in the process of photosynthesis, but also absorb ammonia nitrogen, carbon dioxide and some organic decomposers in water, thereby improving the transparency of the water body and reducing the indexes of water body pollutants. The emergent aquatic vegetation reeds, irises and the like can absorb pollutants such as substrate sludge and nitrogen and phosphorus in water through the root system and can play a good landscape role. The water body treated by the aquatic plant restoration ecological pond reaches the standard of black and odor prevention required by the ministry of construction, and the transparency of the water body is obviously improved.

The effluent treated by the novel ecological stabilization pond is continuously discharged into the river channel to be used as a clear water source supplement of a downstream river channel, so that clear water and smooth river of the downstream river channel are achieved.

The examples are those conducted by the inventors in a village, Pikawa county, Henan province. The local river channel is seriously black and odorous due to the pollution of culture wastewater and the direct discharge of domestic sewage of peripheral residents, and the local residents are greatly influencedProduction and life. The novel ecological stabilization pond is adopted locally to treat the black and odorous water body in the river channel, and the volume of the anaerobic pond in the treatment system is 100m³And the volume of the high-efficiency aerobic pond is 320m³The volume of the sedimentation pond is 305m³The volume of the aquatic plant restoration ecological pond is 830m³The daily sewage treatment capacity of the ecological stabilization pond is 800 m³. The water quality indexes of the water intake and the water outlet of the ecological stabilization pond are monitored, and the water quality detection data are shown in the following table:

and (3) knotting: the water outlet and the water intake water quality detection data are obviously different, the water intake water with severe black and odorous degree is purified and restored by the novel ecological stabilization pond, the water outlet water quality improving effect is obvious, the black and odorous degree is completely eliminated, and the standard of no black and no odorous degree required by the building department is achieved.

Based on the example, the novel treatment system for the black and odorous river channel by the ecological stabilization pond provided by the invention is scientific in sampling, effective in method, capable of obviously reducing pollutants in the black and odorous water body, improving the water quality of the river channel, achieving the standard of black and odorous prevention required by the department of construction, and wide in application prospect for black and odorous river channel treatment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.

Claims

1. The utility model provides a novel ecological stabilization pond is to processing system in black and odorous river course which characterized in that: the sewage treatment system comprises a sewage lifting pump station, an anaerobic pond, a high-efficiency aerobic pond, a sedimentation pond and an aquatic plant restoration ecological pond which are sequentially connected.

2. The sewage lift pump of claim 1 comprising a grid system, an intelligent control system.

3. The volume ratio of the anaerobic pond, the high-efficiency aerobic pond, the sedimentation pond and the aquatic plant restoration pond in claim 1 is about 1:3:3:8, and when the water temperature is more than or equal to 12 ℃, the hydraulic retention time is respectively as follows: 3 hours of an anaerobic pond, 9 hours of a high-efficiency aerobic pond, 9 hours of a sedimentation pond and 24 hours of an aquatic plant restoration ecological pond, and the hydraulic retention time is doubled when the water temperature is lower than 12 ℃.

4. The main structure of the anaerobic pond of claim 3 is a reinforced concrete structure, which contains an automatic chemical feeding device, a biological rope filler, a submersible mixer, etc. the sewage treated by the anaerobic pond enters a high-efficiency aerobic pond, the pond is rapidly and artificially enriched with oxygen by using a blast aerator and a microporous aerator pipe, and a waterwheel aerator, a buoy aerator, etc. are used together to enhance aeration effect, a suspension ball filler is added into the aerobic pond, the automatic chemical feeding device is used to periodically feed compound microorganism bacteria, rapidly increase the dissolved oxygen content in the water body and improve the water quality, the high-efficiency aerobic pond discharges water to a sedimentation pond, the sedimentation pond is equipped with a sludge reflux pump, the sludge deposited in the sedimentation pond mechanically reflows into the high-efficiency aerobic pond, the sedimentation pond discharges water to an aquatic plant restoration ecological pond, the aquatic plants in the aquatic plant restoration ecological pond contain submerged plants and emergent aquatic plants, and the submerged plants are selected from elodea algae, The black algae, the eyedrops and the like have strong pollution resistance, good removal effect, strong adaptability and vigorous growth, and the emergent aquatic vegetation is selected from the vegetation with strong growth ability and good landscape effect, such as reed, iris and the like.