CN104891738A - Ecological treatment method of municipal sewage - Google Patents
Ecological treatment method of municipal sewage Download PDFInfo
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- CN104891738A CN104891738A CN201510275447.4A CN201510275447A CN104891738A CN 104891738 A CN104891738 A CN 104891738A CN 201510275447 A CN201510275447 A CN 201510275447A CN 104891738 A CN104891738 A CN 104891738A
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Abstract
The invention discloses an ecological treatment method of municipal sewage, which comprises the following steps: pretreating municipal sewage, filtering the municipal sewage, carrying out biological treatment on the municipal sewage, and sending the municipal sewage into an aeration tank to perform aeration reaction. In the municipal sewage pretreatment process, when the sewage passes through the grid, large impurities are removed; the sewage is enhanced by a water inlet pump station to enter an aeration-desilting-oil removal tank, thereby removing sand and floating oil in the sewage; and in the municipal sewage biological treatment process, return sludge and the filtered sewage are sufficiently mixed in a 4-6m-deep ecological treatment tank, the activated sludge adsorbs the pollutants within 3-5 minutes, and the phosphorus-accumulating bacterium releases phosphorus, thereby performing biological dephosphorization. The method can implement intermitted aeration; two adjacent branch air pipelines of the second aeration zone and third aeration zone are alternated every two days, and thus, the method has the characteristic of intermitted aeration; and the method can save the electric power, enhances the anaerobic dephosphorization effect, reduces the investment, and has the advantages of land saving and low operating cost.
Description
Technical field
The present invention relates to field of environment engineering, specifically a kind of ecological treatment method of municipal effluent.
Background technology
Along with environmental pollution is on the rise, more strict to the requirement of sewage discharge water quality, the process of current municipal effluent is mainly based on biological treatment.Due to the shortage of water resources, the development of recycling to city of municipal effluent has profound significance.Sewage treatment process conventional both at home and abroad at present has A
2/ O, oxidation ditch process, SBR method and WWRR method.A
2/ O (anoxic-anaerobic-aerobic) utilizes the biology propagation activity of active sludge in anaerobism, anoxic, aerobic processes, the while of organic in degradation of sewage, reach denitrification dephosphorization function, become sewage recycling and the important measures preventing body eutrophication at present.This technology is promoted rapidly abroad, and domestic have also been obtained uses quite widely.The oxidation ditch process of preposition anaerobic pond has the depth of water more shallow, and surface aerating machine oxygenation power consumption is large, and water temperature is scattered and disappeared fast shortcoming, and treatment scale is larger, and these shortcomings are more outstanding, the middle or small sewage treatment of main applicable south China.SBR method collects homogenizing, just heavy, biological degradation, the function such as heavy is in a pond eventually, and sewage intermittent type enters in pond, is purified under the effect of active sludge, and after precipitate and separate, supernatant liquor drains outside pond.This technique is mainly applicable to middle-size and small-size sewage treatment project, but this processing requirement automatization level is higher, and its lness ratio of plant is high, and installed capacity is larger; And this technique uses the multiple blower fan of multiple Ventilator Room to the oxygen supply of ecological wastewater processing pond, be not easy to operational management, power consumption in operational process can be made too high, and on aerator decoration form, in ecological wastewater processing pond, an aeration zone aerator number arranges that too much power consumption is high.
Existing Sewage treatment systems also exists that complicated operation, running cost are high, the problem of poor processing effect, and apparatus and process is complicated, and to the COD in water, the index removal effects such as BOD, SS are also undesirable.Current water treatment worker, in the urgent need to providing a kind of enhanced sewage treatment process and equipment to solve in sewage disposal, water quality situation instability, poor processing effect, complex process, the problem that running cost is high.
Summary of the invention
The object of the present invention is to provide the ecological treatment method of the municipal effluent that a kind of less investment, running cost are low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
An ecological treatment method for municipal effluent, concrete steps are as follows:
(1) municipal effluent pre-treatment: when sewage is by grid, removes bulk foreign material, enters sediment by aeration grease removal tank, remove the sand in sewage and oil slick after water inlet pumping plant promotes;
(2) municipal effluent filtration treatment: pretreated sewage is extracted into reaction water tank, carry out dosing reaction 10-12h, according to water quality requirement, add medicament, medicine is mixed completely with sewage, by reacted sewage suction settling tank precipitation 20-24h, oettIed sewage flows in strumbox and filters, with vacuum primingpump suction filtration water below filtering layer, under suction function, forced filtration water filters through filtering layer;
(3) municipal effluent biological treatment: returned sluge and the sewage after filtering are fully mixed in the ecological treatment ponds of 4-6m in the degree of depth, and pollutent adsorbs by active sludge in 3-5min, polyP bacteria release phosphorus, carries out biological phosphate-eliminating;
(4) municipal effluent enters aeration tank: the sewage after biological phosphate-eliminating is promoted the bottom delivering to an aeration zone by submersible sewage pump, before entering an aeration zone, be provided with measuring apparatus measure the discharge of sewage, the end of sewage an aeration zone enters No. two aeration zones by rubber plate training wall overflow water outlet, then flows automatically to No. three aeration zones by No. two aeration zones;
(5) municipal effluent aerated reaction: in aeration tank, sewage enters in the anaerobic layer of an aeration zone by the bottom of ecological treatment ponds, anerobe eliminates dirty Organic substance in water, by the aerator aeration of an aeration zone, sewage is fully mixed with the active sludge above anaerobic layer, and carry out oxygenation, aerobic bacteria in mud decomposes and absorbs dirty Organic substance in water, base sludge is under anaerobic state, the metabolism with microorganism is cleared up through anerobe, progressively stabilization, water outlet again successively behind No. two aeration zones and the process of No. three aeration zones eventually through training wall overflow to exhalant region, add after disinfectant processes further in exhalant region and collect outlet sump by pipeline, in outlet sump, adding Dephosphorization reagent carrying out dephosphorization process further to reaching sewage drainage standard.
As the present invention's further scheme: described aeration tank is divided into an aeration zone, No. two aeration zones and No. three aeration zones, the aerator interval 4-6m of a described aeration zone, two groups of branch wind pipe track pitch 8-10m; The aerator interval 8-10m of No. two aeration zones, two groups of branch wind pipe track pitch 15-20m; The aerator interval 10-15m of No. three aeration zones, two groups of branch wind pipe track pitch 20-30m.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention can realize intermittent aeration, and No. two aeration zones and the rotation in every two days of adjacent twice branch wind pipe road, No. three aeration zones once, have intermittent aeration feature, can saves energy, in turn enhance the effect of anaerobism dephosphorization, decrease investment, take up an area province, running cost is low.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Embodiment 1
An ecological treatment method for municipal effluent, concrete steps are as follows:
(1) municipal effluent pre-treatment: when sewage is by grid, removes bulk foreign material, enters sediment by aeration grease removal tank, remove the sand in sewage and oil slick after water inlet pumping plant promotes;
(2) municipal effluent filtration treatment: pretreated sewage is extracted into reaction water tank, carry out dosing reaction 10h, according to water quality requirement, add medicament, medicine is mixed completely with sewage, by reacted sewage suction settling tank precipitation 20h, oettIed sewage flows in strumbox and filters, with vacuum primingpump suction filtration water below filtering layer, under suction function, forced filtration water filters through filtering layer;
(3) municipal effluent biological treatment: returned sluge and the sewage after filtering are fully mixed in the ecological treatment ponds of 4m in the degree of depth, and pollutent adsorbs by active sludge in 3min, polyP bacteria release phosphorus, carries out biological phosphate-eliminating;
(4) municipal effluent enters aeration tank: aeration tank is divided into an aeration zone, No. two aeration zones and No. three aeration zones, the aerator interval 4m of a described aeration zone, two groups of branch wind pipe track pitch 8m; The aerator interval 8m of No. two aeration zones, two groups of branch wind pipe track pitch 15m; The aerator interval 10m of No. three aeration zones, two groups of branch wind pipe track pitch 20m; Sewage after biological phosphate-eliminating is promoted the bottom delivering to an aeration zone by submersible sewage pump, before entering an aeration zone, be provided with measuring apparatus measure the discharge of sewage, the end of sewage an aeration zone enters No. two aeration zones by rubber plate training wall overflow water outlet, then flows automatically to No. three aeration zones by No. two aeration zones;
(5) municipal effluent aerated reaction: in aeration tank, sewage enters in the anaerobic layer of an aeration zone by the bottom of ecological treatment ponds, anerobe eliminates dirty Organic substance in water, by the aerator aeration of an aeration zone, sewage is fully mixed with the active sludge above anaerobic layer, and carry out oxygenation, aerobic bacteria in mud decomposes and absorbs dirty Organic substance in water, base sludge is under anaerobic state, the metabolism with microorganism is cleared up through anerobe, progressively stabilization, water outlet again successively behind No. two aeration zones and the process of No. three aeration zones eventually through training wall overflow to exhalant region, add after disinfectant processes further in exhalant region and collect outlet sump by pipeline, in outlet sump, adding Dephosphorization reagent carrying out dephosphorization process further to reaching sewage drainage standard.
Embodiment 2
An ecological treatment method for municipal effluent, concrete steps are as follows:
(1) municipal effluent pre-treatment: when sewage is by grid, removes bulk foreign material, enters sediment by aeration grease removal tank, remove the sand in sewage and oil slick after water inlet pumping plant promotes;
(2) municipal effluent filtration treatment: pretreated sewage is extracted into reaction water tank, carry out dosing reaction 11h, according to water quality requirement, add medicament, medicine is mixed completely with sewage, by reacted sewage suction settling tank precipitation 22h, oettIed sewage flows in strumbox and filters, with vacuum primingpump suction filtration water below filtering layer, under suction function, forced filtration water filters through filtering layer;
(3) municipal effluent biological treatment: returned sluge and the sewage after filtering are fully mixed in the ecological treatment ponds of 5m in the degree of depth, and pollutent adsorbs by active sludge in 4min, polyP bacteria release phosphorus, carries out biological phosphate-eliminating;
(4) municipal effluent enters aeration tank: aeration tank is divided into an aeration zone, No. two aeration zones and No. three aeration zones, the aerator interval 5m of a described aeration zone, two groups of branch wind pipe track pitch 9m; The aerator interval 9m of No. two aeration zones, two groups of branch wind pipe track pitch 18m; The aerator interval 12m of No. three aeration zones, two groups of branch wind pipe track pitch 25m; Sewage after biological phosphate-eliminating is promoted the bottom delivering to an aeration zone by submersible sewage pump, before entering an aeration zone, be provided with measuring apparatus measure the discharge of sewage, the end of sewage an aeration zone enters No. two aeration zones by rubber plate training wall overflow water outlet, then flows automatically to No. three aeration zones by No. two aeration zones;
(5) municipal effluent aerated reaction: in aeration tank, sewage enters in the anaerobic layer of an aeration zone by the bottom of ecological treatment ponds, anerobe eliminates dirty Organic substance in water, by the aerator aeration of an aeration zone, sewage is fully mixed with the active sludge above anaerobic layer, and carry out oxygenation, aerobic bacteria in mud decomposes and absorbs dirty Organic substance in water, base sludge is under anaerobic state, the metabolism with microorganism is cleared up through anerobe, progressively stabilization, water outlet again successively behind No. two aeration zones and the process of No. three aeration zones eventually through training wall overflow to exhalant region, add after disinfectant processes further in exhalant region and collect outlet sump by pipeline, in outlet sump, adding Dephosphorization reagent carrying out dephosphorization process further to reaching sewage drainage standard.
Embodiment 3
An ecological treatment method for municipal effluent, concrete steps are as follows:
(1) municipal effluent pre-treatment: when sewage is by grid, removes bulk foreign material, enters sediment by aeration grease removal tank, remove the sand in sewage and oil slick after water inlet pumping plant promotes;
(2) municipal effluent filtration treatment: pretreated sewage is extracted into reaction water tank, carry out dosing reaction 12h, according to water quality requirement, add medicament, medicine is mixed completely with sewage, by reacted sewage suction settling tank precipitation 24h, oettIed sewage flows in strumbox and filters, with vacuum primingpump suction filtration water below filtering layer, under suction function, forced filtration water filters through filtering layer;
(3) municipal effluent biological treatment: returned sluge and the sewage after filtering are fully mixed in the ecological treatment ponds of 6m in the degree of depth, and pollutent adsorbs by active sludge in 5min, polyP bacteria release phosphorus, carries out biological phosphate-eliminating;
(4) municipal effluent enters aeration tank: aeration tank is divided into an aeration zone, No. two aeration zones and No. three aeration zones, the aerator interval 6m of a described aeration zone, two groups of branch wind pipe track pitch 10m; The aerator interval 10m of No. two aeration zones, two groups of branch wind pipe track pitch 20m; The aerator interval 15m of No. three aeration zones, two groups of branch wind pipe track pitch 30m; Sewage after biological phosphate-eliminating is promoted the bottom delivering to an aeration zone by submersible sewage pump, before entering an aeration zone, be provided with measuring apparatus measure the discharge of sewage, the end of sewage an aeration zone enters No. two aeration zones by rubber plate training wall overflow water outlet, then flows automatically to No. three aeration zones by No. two aeration zones;
(5) municipal effluent aerated reaction: in aeration tank, sewage enters in the anaerobic layer of an aeration zone by the bottom of ecological treatment ponds, anerobe eliminates dirty Organic substance in water, by the aerator aeration of an aeration zone, sewage is fully mixed with the active sludge above anaerobic layer, and carry out oxygenation, aerobic bacteria in mud decomposes and absorbs dirty Organic substance in water, base sludge is under anaerobic state, the metabolism with microorganism is cleared up through anerobe, progressively stabilization, water outlet again successively behind No. two aeration zones and the process of No. three aeration zones eventually through training wall overflow to exhalant region, add after disinfectant processes further in exhalant region and collect outlet sump by pipeline, in outlet sump, adding Dephosphorization reagent carrying out dephosphorization process further to reaching sewage drainage standard.
The present invention can realize intermittent aeration, and No. two aeration zones and the rotation in every two days of adjacent twice branch wind pipe road, No. three aeration zones once, have intermittent aeration feature, can saves energy, in turn enhance the effect of anaerobism dephosphorization, decrease investment, take up an area province, running cost is low.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (2)
1. an ecological treatment method for municipal effluent, is characterized in that, concrete steps are as follows:
(1) municipal effluent pre-treatment: when sewage is by grid, removes bulk foreign material, enters sediment by aeration grease removal tank, remove the sand in sewage and oil slick after water inlet pumping plant promotes;
(2) municipal effluent filtration treatment: pretreated sewage is extracted into reaction water tank, carry out dosing reaction 10-12h, according to water quality requirement, add medicament, medicine is mixed completely with sewage, by reacted sewage suction settling tank precipitation 20-24h, oettIed sewage flows in strumbox and filters, with vacuum primingpump suction filtration water below filtering layer, under suction function, forced filtration water filters through filtering layer;
(3) municipal effluent biological treatment: returned sluge and the sewage after filtering are fully mixed in the ecological treatment ponds of 4-6m in the degree of depth, and pollutent adsorbs by active sludge in 3-5min, polyP bacteria release phosphorus, carries out biological phosphate-eliminating;
(4) municipal effluent enters aeration tank: the sewage after biological phosphate-eliminating is promoted the bottom delivering to an aeration zone by submersible sewage pump, before entering an aeration zone, be provided with measuring apparatus measure the discharge of sewage, the end of sewage an aeration zone enters No. two aeration zones by rubber plate training wall overflow water outlet, then flows automatically to No. three aeration zones by No. two aeration zones;
(5) municipal effluent aerated reaction: in aeration tank, sewage enters in the anaerobic layer of an aeration zone by the bottom of ecological treatment ponds, anerobe eliminates dirty Organic substance in water, by the aerator aeration of an aeration zone, sewage is fully mixed with the active sludge above anaerobic layer, and carry out oxygenation, aerobic bacteria in mud decomposes and absorbs dirty Organic substance in water, base sludge is under anaerobic state, the metabolism with microorganism is cleared up through anerobe, progressively stabilization, water outlet again successively behind No. two aeration zones and the process of No. three aeration zones eventually through training wall overflow to exhalant region, add after disinfectant processes further in exhalant region and collect outlet sump by pipeline, in outlet sump, adding Dephosphorization reagent carrying out dephosphorization process further to reaching sewage drainage standard.
2. the ecological treatment method of municipal effluent according to claim 1, it is characterized in that, described aeration tank is divided into an aeration zone, No. two aeration zones and No. three aeration zones, the aerator interval 4-6m of a described aeration zone, two groups of branch wind pipe track pitch 8-10m; The aerator interval 8-10m of No. two aeration zones, two groups of branch wind pipe track pitch 15-20m; The aerator interval 10-15m of No. three aeration zones, two groups of branch wind pipe track pitch 20-30m.
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Cited By (3)
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| CN112079520A (en) * | 2020-08-20 | 2020-12-15 | 重庆尚泽源环保科技有限公司 | Urban domestic sewage recycling system |
| CN112777861A (en) * | 2020-12-31 | 2021-05-11 | 北京邦源环保科技股份有限公司 | Natural ecological treatment process for domestic sewage |
| CN114804507A (en) * | 2022-03-17 | 2022-07-29 | 国网河北省电力有限公司电力科学研究院 | Biochemical combined treatment method for municipal sewage |
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