CN102627375A - Integrated treatment method and integrated treatment device for polluted river and lake water - Google Patents

Abstract

The invention relates to an integrated treatment method and an integrated treatment device for polluted river and lake water, which belong to the field of sewage treatment. The device comprises a water inlet pipe (1), a mixing tank (2), a flocculation basin (3), a sediment tank (4), a flocculant medicine dissolving tank (5), a magnetic powder adding device (6), a coagulant aid medicine dissolving tank (7), a sludge return pipe (8), a magnetic separator (9), a magnetic powder recycling pipe (10), a water inlet tank (11), a water inlet pump (12), an anoxia tank (13), an aerobic tank (14), an air compressor (15), an air flow meter (16), a water outlet tank (17) and a mixed liquid return pump (18). The integrated treatment method uses a magnetic coagulation treatment technique and a carbon fiber ecological grass biological treatment technique in linkage, can obviously improve sensory index of polluted river and lake water, and reduces the content of organic pollutants and nitrogen and phosphorus pollutants. In practical application, the method and the device have the advantages of being small in occupancy, good in treated water quality, low in treatment cost and the like.

Description

A kind of contaminated river lake water integrated processing method and device

Technical field

The present invention relates to a kind of integrated treatment technology of contaminated river lake water and treatment unit thereof, belong to sewage treatment area.

Background technology

In recent years, river Lake Water Body eutrophication incident frequently takes place in China, and nitrogen, phosphorus are the principal elements of eutrophication, and country has put into effect more strict surface water standard for this reason.Up-to-date " national water environment quality standard GB3838-2002 " regulation, IV class water body emission standard is COD _Cr≤30mg/L, NH ₃-N≤1.5mg/L, total phosphorus≤0.3mg/L.Because it is serious further that the epibenthic sewage discharge in river is polluted surface water body, keep river and lake water quality pressure up to standard also increasing.Therefore, through with the logotype of the ecological grass of magnetic-coagulation treatment technology and thomel (carbon fiber bundle) water treatment method, the development of new treatment unit reaches the purpose that purifies water, suppresses river Lake Water Body eutrophication trend.Advantages such as this technology has little, the good processed water quality of floor space in practical application, processing cost is cheap.

The ecological careless water treatment method logotype of magnetic-coagulation treatment technology and thomel belongs to novel river lake water treatment technology.Because the present stage pollution problem of China river Lake Water Body is more and more serious; Add that means are handled in traditional materialization and existing biological treatment device energy consumption is high; Construction cost is high, presses for the exploitation of treatment unit new and effective, energy-conservation, that floor space is less and related process Study on Technology.Therefore, the invention of this technology can be water pollution control field a kind of practicality, efficient, energy-conservation, available recent studies on direction is provided.

Summary of the invention

The present invention adds magnetic in the coagulation process; Can make the flco parcel tighter; Settling of floccus speed is faster, can effectively improve the removal effect of traditional coagulation process to suspended matter and Phosphorus pollutent in the Lake Water Body of river, also can improve the Oranoleptic indicator of water body; The ecological careless water treatment device microorganism colonization speed of thomel is fast, can reach steady-working state very soon, makes water outlet up to standard.With the two logotype, can effectively realize in the lake water of contaminated river organic matter degradation, denitrogenation dephosphorizing and improve Oranoleptic indicator's purification of water quality target.

Contaminated river lake water integrated treating device comprises: water inlet pipe 1, mixing pit 2, flocculation basin 3, settling tank 4, flocculation agent medicine dissolving tank 5, magnetic throwing device 6, coagulant aids medicine dissolving tank 7, mud return line 8, magnetic separator 9, magnetic TFL 10, suction sump 11, intake pump 12, anoxic pond 13, Aerobic Pond 14: need series connection at least 2 ponds, air compressor machine 15, air flowmeter 16, outlet sump 17 and mixed-liquor return pumps 18.Device characteristic is: flocculation agent medicine dissolving tank 5 is connected with mixing pit 2 through water inlet pipe 1; Mixing pit 2 is equipped with stirring rake, is connected with flocculation basin 3 through sluice gate; Magnetic separator 9 is connected with magnetic TFL 10, magnetic throwing device 6, and magnetic throwing device 6 is installed in the upper front end of mixing pit 2; Coagulant aids medicine dissolving tank 7 is connected with flocculation basin 3; Flocculation basin 3 is equipped with stirring rake, is connected with settling tank 4 through the pool wall flashboard; Sludge reflux pump is installed in settling tank 4 bottoms, and is connected with mud return line 8, magnetic separator 9; Settling tank 4 is connected with suction sump 11, and suction sump 11 links to each other with anoxic pond 13 through intake pump 12; Anoxic pond 13 connects the mixed-liquor return pipe, and inside is arranged the ecological grass of thomel from top to bottom, is connected with Aerobic Pond 14 through the bottom flashboard; Aerobic Pond 14 inside are arranged the ecological grass of thomel from top to bottom, and are located at the outer air compressor machine 15 of Aerobic Pond and are connected with air flowmeter 16; 2 above Aerobic Ponds of Aerobic Pond 14 series connection, and be connected with the mixed-liquor return pipe, the mixed-liquor return pipe links to each other with the mixed-liquor return pipe of anoxic pond 13 through mixed-liquor return pump 18; Aerobic Pond 14 is connected with outlet sump 17.

The reaction unit mode of operation: the coagulant aids in flocculation agent in the flocculation agent medicine dissolving tank 5 and the coagulant aids medicine dissolving tank 7 drops into mixing pit 2 and flocculation basin 3 respectively, and dosage is as the criterion with the V class that the coagulation process water outlet reaches among the water environment quality standard GB3838-2002; Magnetic concentration in the mixing pit 2 is not less than 150mg/L; Magnetic flco mixed solution flows into settling tank 4, and magnetic flco rapid precipitation is after mud refluxes and reclaim magnetics through magnetic separator 9, and gets into magnetic throwing device 6 again; Flow into suction sump 11 through the post precipitation supernatant in the settling tank 4, supernatant is promoted to anoxic pond 13 through intake pump 12; Denitrifying bacteria in the anoxic pond 13 is the carbon elimination denitrogenation simultaneously; The sewage flow by gravity gets into Aerobic Pond 14, and autotrophic type nitrobacteria is wherein realized the purpose of denitrogenation under the competent condition of dissolved oxygen, and the mikrobe that possesses the organic matter degradation ability realizes removing organic purpose; Aerobic Pond 14 is a part of mixed-liquor return to anoxic pond 13, and links to each other with outlet sump 17.

Contaminated river lake water integrated processing method and device can be used for improving existing contaminated river lake water materialization and biochemical processing process.The lake water through the river of this technical finesse, the concentration of its suspended substance, biochemical oxygen demand, nitrogen and phosphorus is all lower, and water outlet the Oranoleptic indicator significantly improve.Because the flco that the input of magnetic produces coagulation is more closely knit, settling rate is faster, and the reserves in the unit time significantly promote, and have saved the plant area area; The ecological grass of thomel is used for the upgrading of existing sewage work, and owing to sludge treatment equipment need be set, can greatly reduce the capital construction cost.

Description of drawings

Fig. 1 is contaminated river lake water integrated processing method and a schematic diagram of device among the present invention one.

Among the figure: 1 water inlet pipe, 2 mixing pits, 3 flocculation basins, 4 settling tanks, 5 flocculation agent medicine dissolving tanks, 6 magnetic throwing devices, 7 coagulant aids medicine dissolving tanks, 8 mud return lines, 9 magnetic separators, 10 magnetic TFLs, 11 suction sumps, 12 intake pumps, 13 anoxic pond, 14 Aerobic Ponds: need series connection at least 2 ponds, 15 air compressor machines, 16 air flowmeter, 17 outlet sumies and 18 mixed-liquor return pumps.

Embodiment

The reaction unit mode of operation: the coagulant aids in flocculation agent in the flocculation agent medicine dissolving tank 5 and the coagulant aids medicine dissolving tank 7 drops into mixing pit 2 and flocculation basin 3 respectively, and dosage is as the criterion with the V class that the coagulation process water outlet reaches among the water environment quality standard GB3838-2002; The magnetic that reclaims in magnetic throwing device 6 and the magnetic separator 9 drops into mixing pit 2, and magnetic concentration keeps being not less than 150mg/L.After stirring action in the mixing pit 2 is realized the thorough mixing of magnetic and flocculation agent, flow into flocculation basin 3 through sluice gate; The sewage that flows in coagulant aids in the coagulant aids medicine dissolving tank 7 and the mixing pit 2 is realized the thorough mixing cohesion under the stirring action in flocculation basin 3, forming with the magnetic is the magnetic flco of cohesion core; Magnetic flco mixed solution flows into settling tank 4 through sluice gate, and magnetic flco rapid precipitation is carried out the magnetic Separation and Recovery after the diving sludge reflux pump gets into magnetic separator 9 through mud return line 8, and the magnetic of recovery gets into magnetic throwing device 6 again through magnetic TFL 10; The supernatant that produces through post precipitation in the settling tank 4 flows into suction sump 11 through submersible pump and pipeline, through intake pump 12 the magnetic flocculation water outlet is promoted to anoxic pond 13; The dissolved oxygen content of anoxic pond 13 is lower than 1mg/L, and the denitrifying bacteria in it utilizes organism and the nitrate salt in the backflow mixed liquor in the water to carry out denitrification, simultaneously the carbon elimination denitrogenation; Anoxic pond 13 links to each other with Aerobic Pond 14 through the bottom sluice gate, and the water flow by gravity gets into Aerobic Pond; When sewage got into Aerobic Pond 14, dissolved oxygen content wherein was not less than 3mg/L, makes the autotrophic type nitrobacteria under the competent condition of dissolved oxygen, ammonia nitrogen is converted into nitrate nitrogen, realized the purpose of denitrogenation; The microbial consumption that possesses the organic matter degradation ability is simultaneously fallen the organic purpose of carbon source realization removal in the former water; Aerobic Pond 14 is connected with anoxic pond 13 through mixed-liquor return pump 18, and with a part of mixed-liquor return to anoxic pond 13, return current ratio of the mixed liquid is between 50%～300%; Aerobic Pond 14 links to each other with outlet sump 17 through rising pipe, is discharged in the water drain water outlet after handling or the lake, river.

Raw water quality adopts the logical favour river in Beijing, and water quality is following: turbidity 3～6NTU, COD40～60mg/L, NH ₃-N 2～6mg/L, total phosphorus about 1.Through this reactor for treatment, delivery turbidity is less than 0.5NTU, and clearance is more than 80%; COD content is 4～6mg/L, and clearance is more than 90%; NH ₃-N content is less than 0.1mg/L, and clearance is more than 95%; The water outlet total phosphorus is less than 0.1mg/L, and clearance is more than 90%.Water outlet COD, ammonia nitrogen, total phosphorus all satisfy " national water environment quality standard GB3838-2002 " IV class water body emission standard; The ecological careless river of thomel lake water treatment unit is handled river lake water and can be obtained denitrification effect preferably, and this invention has been applied to the urban rivers and lakes water treatment.

This device is fit to existing water treatment plant's denitrogenation dephosphorizing upgrading and newly-built treatment plant.This treatment unit has characteristics such as the floor space of saving, raising processing power.

Claims (2)

1. a contaminated river lake water integrated treating device is characterized in that comprising: water inlet pipe (1), mixing pit (2), flocculation basin (3), settling tank (4), flocculation agent medicine dissolving tank (5), magnetic throwing device (6), coagulant aids medicine dissolving tank (7), mud return line (8), magnetic separator (9), magnetic TFL (10), suction sump (11), intake pump (12), anoxic pond (13), Aerobic Pond (14), air compressor machine (15), air flowmeter (16), outlet sump (17) and mixed-liquor return pump (18); Flocculation agent medicine dissolving tank (5) is connected with mixing pit (2) through water inlet pipe (1); Mixing pit (2) is equipped with stirring rake, is connected with flocculation basin (3) through sluice gate; Magnetic separator (9) is connected with magnetic TFL (10), magnetic throwing device (6), and magnetic throwing device (6) is installed in the upper front end of mixing pit (2); Coagulant aids medicine dissolving tank (7) is connected with flocculation basin (3); Flocculation basin (3) is equipped with stirring rake, is connected with settling tank (4) through the pool wall flashboard; Settling tank (4) bottom is installed the diving sludge reflux pump and is connected with mud return line (8), magnetic separator (9); Settling tank (4) is connected with suction sump (11), and suction sump (11) links to each other with anoxic pond (13) through intake pump (12); Anoxic pond (13) connects the mixed-liquor return pipe, and inside is arranged the ecological grass of thomel from top to bottom, is connected with Aerobic Pond (14) through the bottom flashboard; Aerobic Pond (14) inside is arranged the ecological grass of thomel from top to bottom, and is located at the outer air compressor machine (15) of Aerobic Pond and is connected with air flowmeter (16); Aerobic Pond (14) is the Aerobic Pond more than 2 that is cascaded, and is connected with the mixed-liquor return pipe, and the mixed-liquor return pipe links to each other with the mixed-liquor return pipe of anoxic pond (13) through mixed-liquor return pump (18); Aerobic Pond (14) is connected with outlet sump (17).

2. application rights requires the method for 1 said a kind of contaminated river lake water integrated treating device; It is characterized in that: the coagulant aids in flocculation agent in the flocculation agent medicine dissolving tank (5) and the coagulant aids medicine dissolving tank (7) drops into mixing pit (2) and flocculation basin (3) respectively, and dosage is as the criterion with the V class that the coagulation process water outlet reaches among the water environment quality standard GB3838-2002; Magnetic throwing device (6) drops into mixing pit (2) with the middle magnetic that reclaims of magnetic separator (9), and magnetic concentration is not less than 150mg/L; After stirring action in the mixing pit (2) is realized the thorough mixing of magnetic and flocculation agent, flow into flocculation basin (3) through sluice gate; The sewage that flows in coagulant aids in the coagulant aids medicine dissolving tank (7) and the mixing pit (2) is realized the thorough mixing cohesion under the stirring action in flocculation basin (3), forming with the magnetic is the magnetic flco of cohesion core; Magnetic flco mixed solution flows into settling tank (4) through sluice gate; Magnetic flco rapid precipitation is carried out the magnetic Separation and Recovery after the diving sludge reflux pump gets into magnetic separator (9) through mud return line (8), and the magnetic of recovery gets into magnetic throwing device (6) again through magnetic TFL (10); The supernatant that produces through post precipitation in the settling tank (4) flows into suction sump (11) through submersible pump and pipeline, through intake pump (12) the magnetic flocculation water outlet is promoted to anoxic pond (13); The dissolved oxygen content of anoxic pond (13) is lower than 1mg/L, and the denitrifying bacteria in it utilizes organism and the nitrate salt in the backflow mixed liquor in the water to carry out denitrification, simultaneously the carbon elimination denitrogenation; Anoxic pond (13) links to each other with Aerobic Pond (14) through the bottom sluice gate, and the water flow by gravity gets into Aerobic Pond; When sewage got into Aerobic Pond (14), dissolved oxygen content wherein was not less than 3mg/L, makes the autotrophic type nitrobacteria under the competent condition of dissolved oxygen, ammonia nitrogen is converted into nitrate nitrogen, realized the purpose of denitrogenation; The microbial consumption that possesses the organic matter degradation ability is simultaneously fallen the organic purpose of carbon source realization removal in the former water; Aerobic Pond (14) is connected with anoxic pond (13) through mixed-liquor return pump (18), and with a part of mixed-liquor return to anoxic pond (13), return current ratio of the mixed liquid is between 50%～300%; Aerobic Pond (14) links to each other with outlet sump (17) through rising pipe, is discharged in the water drain water outlet after handling or the lake, river.