CN105174633A - Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A - Google Patents

Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A Download PDF

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CN105174633A
CN105174633A CN201510625417.1A CN201510625417A CN105174633A CN 105174633 A CN105174633 A CN 105174633A CN 201510625417 A CN201510625417 A CN 201510625417A CN 105174633 A CN105174633 A CN 105174633A
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electrolysis
water
flocculation
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罗依依
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Boying (Xiamen) Technology Co., Ltd.
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罗依依
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Abstract

The invention discloses a comprehensive standard increase method for increasing the standard of discharged water of a municipal wastewater treatment plant from the first grade B to the first grade A. The method includes the following steps of firstly, conducting flocculent precipitate or gas flotation; secondly, conducting electrolysis. The flocculent precipitate or gas flotation and electrolysis combined process is adopted as the method for comprehensively improving twelve indexes of the discharged water of the municipal wastewater treatment plant from the first grade B to the first grade A. By means of the flocculent precipitate or gas flotation, intercoagulation of solid substances (SS) in water can be accelerated to form particle fixtures large in grain size and mass, rapid precipitate removal is conducted, and meanwhile phosphorus, part of organic matters and total nitrogen are removed; flocculent precipitate or gas flotation discharged water enters an electrolysis machine, strong-oxidizing-property substances generated through electrolysis kill microorganisms, bacteria, algae and planktons in water, organic matters in water are oxidized and degraded at the same time, 12 pollution indexes including COD, the chromaticity and ammonia nitrogen in water are greatly reduced, and the water quality indexes comprehensively reach the first-grade-A emission standard.

Description

Municipal sewage plant discharge water puies forward mark method by one-level B to one-level A comprehensively
Technical field
The invention belongs to the field for the treatment of of water pollution of environmental engineering, more specifically refer to method municipal sewage plant discharge water being brought up to comprehensively one-level A standard by " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard.
Background technology
The sewage treatment process of existing municipal sewage plant comparative maturity is: sewage equalizing tank → coarse rack → fine fack → preliminary sedimentation tank → biochemistry pool → second pond → sterilization pool → discharge, can only reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard effluent index, its index is as table 1:
The highest permission emission concentration (annual average) of table 1 basic controlling project
Sequence number Basic controlling project One-level B standard (mg/L)
1 COD 60
2 BOD 20
3 SS 20
4 Vegetable and animals oils 3
5 Petroleum-type 3
6 Anion surfactant 1
7 Total nitrogen (in N) 20
8 Ammonia nitrogen (in N) 8(15)
9 Total phosphorus (in P) 1
10 Colourity (extension rate) 30
11 pH 6-9
12 Excrement colibacillus group number (individual/L) 10 4
In order to improve water surrounding, State Council is about notice (No. (2015) 17, the promulgated by the State Council) requirement of printing and distributing water prevention and cure of pollution action plan, and " sensitizing range (emphasis lake, emphasis reservoir, immediate offshore area watershed) urban wastewater treatment facility should reach one-level emission standard A before the end of the year 2017 comprehensively.Builtup areas water quality does not reach the city of surface water IV class standard, and newly-merged university sewage treatment facility will perform one-level emission standard A ".But the water outlet of the sewage treatment process of existing municipal sewage plant can only reach the standard of one-level B, can not the effluent quality of one-level A standard, cannot meet the one-level A standard-required of promulgated by the State Council (2015) No. 17 " water prevention and cure of pollution action plans ", its reason is:
1, existing sewage work does not have flocculation process, existing heavy pool process can only precipitate the precipitation of removing larger particles, some density and water close, it is not thorough that particle diameter is that thing precipitation is floated in the small-particle county of 1 ~ 100 μm, not only cause SS higher, cause the indexs such as COD, BOD, total nitrogen, ammonia nitrogen all higher simultaneously;
2, existing sewage work does not have special dephosphorization process, mainly utilizes the phosphorus bacterium that bites of biochemical process to be enriched in mud by the phosphorus in sewage, removes with the form of excess sludge.Along with influent quality fluctuation, phosphor-removing effect is unstable, cannot meet the effluent index of 0.5mg/L;
3, traditional sterilization method, the sterilisation effect as chlorine disinfectant, disinfection by chlorine dioxide, disinfection by ultraviolet light etc. is easily subject to water quality impact and not up to standard.
Authorization Notice No. be the patent of invention of CN103848542B disclose a kind of sewage disposal carry mark transformation sewerage advanced treatment process, this technique increases the combination process in one section of efficient sedimentation tank and riser cloth filter tank between the second pond and sterilization pool of former technique.Although this patent can solve dephosphorization and oil removal amount hang-up in former technique, the COD of one-level A standard, BOD, total nitrogen, ammonia nitrogen can not be met, move and plant the indexs such as oil, petroleum-type, anion surfactant, colourity (extension rate) and excrement colibacillus group number.Therefore, existing mark method of carrying normally increases a dephosphorization operation, a biochemical oxidation except COD operation (as sudden and violent gas biological filter) or Advanced oxidation technologies (as Fenton oxidation) are except COD operation and degree of depth disinfecting steps on original one-level B sewage treatment process, not only newly-increased investment is large, working cost increases many, and need take more large-area place.Existing sewage work majority is in down town, lacks the place of plant retrofit requirement of engineering, and this type of feasibility carrying mark reforming technology is not strong.
Summary of the invention
The invention provides a kind of municipal sewage plant discharge water and put forward mark method from one-level B to one-level A comprehensively, its main purpose is to overcome putting forward mark technique or needing new area increased place, investment and working cost of existing one-level B standard water outlet, or some index can only be improved, water outlet can not reach the shortcoming of one-level A comprehensively.
The present invention adopts following technical scheme:
A kind of municipal sewage plant discharge water puies forward mark method by one-level B to one-level A comprehensively, it is the former technique by existing Sewage Plant: based on sewage equalizing tank → coarse rack → fine fack → preliminary sedimentation tank → biochemistry pool → second pond → sterilization pool → discharge, between the biochemistry pool and second pond of former technique, increase flocculation sediment or after the second pond of former technique, increase flocculation-air floating operation (holding inadequate situation mainly for second pond pond), and change original sterilization into electrolysis process, namely increase following steps:
(1) flocculation: after Sewage Plant biochemical treatment, sewage enters flocculation tank, adds appropriate flocculation agent in flocculation tank and coagulant aids carries out flocculation reaction, enters step (2) precipitate and separate after flocculation reaction;
(2) precipitate and separate: the sewage in step (1) after flocculation enters second pond or air flotation pool through water distributor, and carrying out precipitate and separate is clear liquid and mud;
(3) electrolysis: the clear liquid of step (2) precipitate and separate gained pumps into electrolysis in electrolysis machine, namely electrolysis water outlet reaches the emission standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A comprehensively.
Step (1) described flocculation agent is aluminium salt, molysite, poly-aluminium, the one of Polyferric Sulfate or any two or more combination; Described aluminium salt is Tai-Ace S 150 or aluminum chloride; Described molysite is ferric sulfate, ferrous sulfate; Described poly-aluminium is polymerize aluminum chloride, polyaluminium sulfate or polymer aluminium silicate; Described Polyferric Sulfate is poly-ferric chloride, bodied ferric sulfate or polyferric silicate sulfate; Consumption is 1 ~ 15g/m 3.
Step (1) described coagulant aids is PAM, and consumption is 1 ~ 3g/m 3.
Step (1) if described flocculation time sewage work sewage pH when being less than 8, also comprise one and add sodium hydroxide or sodium carbonate, regulate the step of pH to 8 ~ 9 of sewage.
Precipitate and separate described in step (2) utilizes the second pond of existing Sewage Plant to carry out gravity settling separation, not newly-increased settling tank.
Precipitate and separate described in step (2) is dissolved air flotation.
The operating voltage of described electrolysis machine is 1 ~ 36V, and two interelectrode voltages are 1 ~ 3V, and current density is 5 ~ 320mA/cm 2, in step (2), the residence time of clear liquid in electrolysis machine is 30s ~ 5min.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
The top layer of described nano-catalytic noble electrode is coated with the metal oxide containing precious metals inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
Described flocculation and depositing technology combine or to flocculate and air-float technology combines and can realize following target:
1, the phosphate radical in the iron ion in flocculation agent or aluminum ion and sewage reacts, and generates tertiary iron phosphate or aluminum phosphate precipitation, except in decontaminated water 30 ~ 65% phosphorus, ensure that the phosphorus of water outlet is less than the effluent index of 0.5mg/L.
2, by the flocculation sediment effect of flocculation agent and coagulant aids, can make biochemical after some density and water close, particle diameter is that the small-particle county of 1 ~ 100 μm floats thing and flocculation agent and coagulant aids effect and forms larger particles and precipitate, and not only makes the SS of water outlet be less than the effluent index of 10mg/L.Also together remove COD, the BOD of in decontaminated water 10 ~ 45%, total nitrogen, ammonia nitrogen and 70 ~ 85% vegetable and animals oils, petroleum-type simultaneously.
Electrolysis has following effect and realizes following target:
1, shock by electricity effect
In low voltage, under big current effect, electric current directly punctures microbial cell wall in middle water, causes the death of microorganism.
2, electronic action is captured
The microorganism lived, all with electric charge, in low voltage, under big current effect, captures the electronics that the microorganism itself in middle water carries, and makes microorganism lose electronics and dead.
3, free radical killing action
Electrolysis can produce the very strong free radical of chemically reactive: as Cl, H, O, OH etc., the spore of effectively kill virus, bacterium and algae can play the object of sterilization.
By above three effects, guarantee that the microbiological indicator of water outlet is qualified.
4, oxygenizement
The very strong free radical of chemically reactive is produced: as Cl, H, O, OH etc. during electrolysis, can promptly with the organism in sewage, reduce its COD, BOD, total nitrogen, ammonia nitrogen, dynamic object of planting oil, petroleum-type, anionic surfactant concentration and colourity as organism, coloring matter, ammonia nitrogen etc. play electrocatalytic reaction thus reach.
5, precipitating action
The OH produced in electrolytic process can with some Action of Metal Ions (as Fe 3+) produce settle and get off, these precipitate small particles can play coagulant aids, promote that the suspended matter in solution assembles sedimentation.In addition in electrolytic process, electric field can destroy rapidly the colloidal structure in water body, make water body de-steady, impel kill in the suspended solid be present in waste water, water microorganism, bacterium, algae and planktonic organism corpse, the colloid be dissolved in water is long produces flocculation sediment, very big limit reduces the consumption of the flocculation agent added.
6, air supporting effect
The nascent state Hydrogen Energy that in electrolytic process, negative electrode produces forms a large amount of bubbles, along with the floating of gas, can take a large amount of suspended solids out of, reach the effect of solid-liquid separation, thus reduces the pollution index such as COD, colourity, turbidity in waste water further.
7, act synergistically
Electrolysis can also produce significant synergistic effect, as therefore acid and base effect, many electric layer effect, air supporting effect, inductive effect and adsorption effect etc. can improve the efficiency of NCE greatly except producing free radical.
8, except the effect of smelling
Electrolysis smells material effect except sending out in the free radical and the sewage that produce, and can eliminate and smell outside taste, the electromagnetic oscillation of electrolytic process can make a chemical bond generation open loop chain scission of smelling material, thus taste is smelt in elimination.Therefore, electrolysis has the elimination being difficult to allow people write to smell taste effect.
Guarantee that COD, the BOD of water outlet, total nitrogen, ammonia nitrogen, dynamic oil, petroleum-type, anionic surfactant concentration and the chromaticity index of planting are qualified by effect above.
Compared to the prior art, tool has the following advantages in the present invention:
1, the sterilization after second pond changes electrolysis into can by adjusting electric current, voltage control sterilization, C0D, BOD, moving and plant the indexs such as oil, petroleum-type, anion surfactant and colourity, guarantee that the discharge water after processing can reach one-level category-A standard in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) completely, use maneuverability.
2, solve existing Sewage Plant to carry mark and there is no the inadequate Realistic Dilemma in place or place.
The present invention only makes a small amount of amendment for the last part technology of existing Sewage Plant treatment process, do not need to change the whole technical process of existing factory, in transformation project, only need to increase by one between biochemistry pool and second pond take up an area very little flocculation reaction tank (pond), the gap of existing sewage work can be made full use of, do not need to increase land area; Meanwhile, utilize original sterilization place, original sterilization equipment is replaced by electrolyzer, also do not need to increase land area, reach and both sterilized, reduce COD, BOD, ammonia nitrogen etc. simultaneously.Namely adopt: the combination process of sewage equalizing tank → coarse rack → fine fack → preliminary sedimentation tank → biochemistry pool → flocculation → second pond → electrolysis → discharge is as putting forward mark method comprehensively.Whole improvement project does not change original production technique layout, newly-increased land area, has both solved existing Sewage Plant and has carried mark and do not have the inadequate Realistic Dilemma in place or place, and in turn saved great amount of investment.
3, existing facility and equipment substantially all utilize, and original investment can not be caused to waste.
4, on the basis of former technology and equipment, only increase flocculation, electrolysis process and equipment, every cube of sewage newly-increased investment saves nearly half than additive method.
5, on one-level B working cost basis, the processing costs of every side's sewage increases less than 30%, and working cost is low.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of existing one-level B emission standard sewage work;
Fig. 2 is the process flow sheet that the present invention increases flocculation sediment and electrolysis on former technical process basis;
Fig. 3 is the process flow sheet that the present invention increases flocculation-air floating and electrolysis on former technical process basis.
Embodiment
Referring to figure, the specific embodiment of the present invention is described.
embodiment one
With reference to Fig. 2, the transformation embodiment of certain sewage work, because the second pond capacity of former engineering is comparatively large, sedimentation effect is good, therefore, is selected in the technique adding flocculation before second pond.Namely after former facility (Fig. 1) biochemical treatment operation, flocculation operation (Fig. 2 dotted portion) is increased, enter sedimentation in secondary sedimentation tank with water pipe and water distributor to be again separated, supernatant liquor enters electrolysis (substituting former sterilization, dotted portion) operation, after electrolysis, namely draining reaches comprehensive one-level emission standard A.
After biochemical, water outlet enters flocculation tank, adds copperas solution by 3mg/L, is that under the condition of 120 turns after flocculation reaction, entering and help solidifying filling, add coagulant aids PAM by 1mg/L, is enter second pond after reaction under the condition of 40 turns at rotating speed at rotating speed.
The effluent quality index of described biochemical operation, the effluent quality of sedimentation in secondary sedimentation tank and the discharge water water-quality guideline after electrolysis treatment are as table 2.
Water inlet and the effluent quality index of mark transformation operation are put forward by certain sewage work of table 2
Sequence number Basic controlling project Biochemical operation effluent quality (mg/L) Secondary clarifier effluent water quality (mg/L) Electrolysis effluent quality (mg/L) One-level category-A emission standard (mg/L)
1 COD 95 51 46 50
2 BOD 32 13 9 10
3 SS - 9 9 10
4 Vegetable and animals oils 3 1 1 1
5 Petroleum-type 3 1 1 1
6 Anion surfactant 1 0.5 0.5 0.5
7 Total nitrogen (in N) 21 7 6.5 15
8 Ammonia nitrogen (in N) 17 6 3.23 5
9 Total phosphorus (in P) 1.5 0.48 0.48 0.5
10 Colourity (extension rate) 40 25 20 30
11 pH 8-9 8-9 7-8 6-9
12 Excrement colibacillus group number (individual/L) 1.31×10 4 1.31×10 4 100 10 3
As known from Table 2, one-level category-A standard in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) is met completely through above improved effluent index.
embodiment two
With reference to Fig. 3, the transformation embodiment of certain sewage work, because its second pond design pond holds not, sedimentation effect is poor, increase flocculation and air supporting operation (Fig. 3 dotted portion) after tying up to former facility (Fig. 1) second pond, the clear liquid after air supporting enters electrolysis (substituting former sterilization, dotted portion) operation, after electrolysis, namely draining reaches comprehensive one-level emission standard A.
After biochemical, water outlet enters flocculation tank, copperas solution is added by 15mg/L, and add 5% sodium hydroxide solution regulate pH to 8-9(due to pH be 6-7), be under the condition of 120 turns after flocculation reaction at rotating speed, enter and help solidifying filling, add coagulant aids PAM by 1mg/L and enter air flotation pool after reaction under the condition of 60 turns, the water outlet after described air supporting flows into electrolysis machine.
Effluent quality after described sedimentation in secondary sedimentation tank operation, air supporting effluent quality and electrolysis effluent quality are as table 3.
Water inlet and the effluent quality index of mark transformation operation are put forward by certain sewage work of table 3
Sequence number Basic controlling project Secondary clarifier effluent water quality (mg/L) Air flotation pool effluent quality (mg/L) Electrolysis effluent quality (mg/L) One-level category-A emission standard (mg/L)
1 COD 64 52 48 50
2 BOD 21 11 8 10
3 SS 43 5 6 10
4 Vegetable and animals oils 3 0.5 0.5 1
5 Petroleum-type 3 0.5 0.5 1
6 Anion surfactant 1 0.5 0.5 0.5
7 Total nitrogen (in N) 20.4 12 10 15
8 Ammonia nitrogen (in N) 14.3 6 3 5
9 Total phosphorus (in P) 1.0 0.2 0.1 0.5
10 Colourity (extension rate) 45 30 10 30
11 pH 6-7 6-9 6-8 6-9
12 Excrement colibacillus group number (individual/L) 1.26×10 5 1.35×10 5 200 10 3
As known from Table 3, one-level category-A standard in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) is met completely through above improved effluent index.
embodiment three
With reference to Fig. 3, the transformation embodiment of certain sewage work, because its second pond design pond holds not, sedimentation effect is poor, increase flocculation and air supporting operation (Fig. 2 dotted portion) after tying up to former facility (Fig. 1) second pond, the clear liquid after air supporting enters electrolysis (substituting former sterilization, dotted portion) operation, after electrolysis, namely draining reaches comprehensive one-level emission standard A.
After described biochemistry, water outlet enters flocculation tank, alum liquor is added by 3mg/L, and add 5% sodium carbonate solution regulate pH to 8-9(due to pH be 6-7), be under the condition of 120 turns after flocculation reaction at rotating speed, enter and help solidifying filling, add coagulant aids PAM by 3mg/L and enter air flotation pool after reaction under the condition of 60 turns, the water outlet after air supporting flows into electrolysis machine and carries out electrolysis.
Effluent quality after described sedimentation in secondary sedimentation tank operation, air supporting effluent quality and electrolysis effluent quality are as table table 4.
Water inlet and the effluent quality index of mark transformation operation are put forward by certain sewage work of table 4
Sequence number Basic controlling project Secondary clarifier effluent water quality (mg/L) Air flotation pool effluent quality (mg/L) Electrolysis effluent quality (mg/L) One-level category-A emission standard (mg/L)
1 COD 60 35.34 32.6 50
2 BOD 19 9 5 10
3 SS 48 5 9 10
4 Vegetable and animals oils 3 0.5 0.5 1
5 Petroleum-type 3 0.5 0.5 1
6 Anion surfactant 1 0.5 0.5 0.5
7 Total nitrogen (in N) 20.4 13 10 15
8 Ammonia nitrogen (in N) 14.3 5 3 5
9 Total phosphorus (in P) 1.0 0.5 0.3 0.5
10 Colourity (extension rate) 45 25 10 30
11 pH 6-7 6-9 6-8 6-9
12 Excrement colibacillus group number (individual/L) 1.30×10 5 1.32×10 5 200 10 3
As known from Table 4, one-level category-A standard in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) is met completely through above improved effluent index.
embodiment four
With reference to Fig. 2, the transformation embodiment of certain sewage work, because the second pond capacity of former engineering is comparatively large, sedimentation effect is good, therefore, is selected in the technique adding flocculation before second pond.Namely after former facility (Fig. 1) biochemical treatment operation, flocculation operation (Fig. 2 dotted portion) is increased, enter sedimentation in secondary sedimentation tank with water pipe and water distributor to be again separated, supernatant liquor enters electrolysis (substituting former sterilization, dotted portion) operation, after electrolysis, namely draining reaches comprehensive one-level emission standard A.
After described biochemistry, water outlet enters flocculation tank, polymeric silicicacid ferrous solution is added by 3mg/L, be under the condition of 120 turns after flocculation reaction at rotating speed, enter and help solidifying filling, add coagulant aids PAM by 1mg/L and enter second pond after reaction under the condition of 40 turns, the water outlet of described sedimentation in secondary sedimentation tank flows into electrolysis machine.
The effluent quality of described biochemical operation, secondary clarifier effluent water quality and electrolysis effluent quality index are as table 5.
Water inlet and the effluent quality index of mark transformation operation are put forward by certain sewage work of table 5
Sequence number Basic controlling project Biochemical operation effluent quality (mg/L) Secondary clarifier effluent water quality (mg/L) Electrolysis effluent quality (mg/L) One-level category-A emission standard (mg/L)
1 COD 118 48 43 50
2 BOD 29 9 5 10
3 SS - 8 9 10
4 Vegetable and animals oils 3 1 1 1
5 Petroleum-type 3 1 1 1
6 Anion surfactant 1 0.5 0.5 0.5
7 Total nitrogen (in N) 23 13 12 15
8 Ammonia nitrogen (in N) 19 5.6 4 5
9 Total phosphorus (in P) 1.5 0.3 0.3 0.5
10 Colourity (extension rate) 35 25 20 30
11 pH 8-9 8-9 7-8 6-9
12 Excrement colibacillus group number (individual/L) 1.34×10 4 1.34×10 4 100 10 3
As known from Table 5, one-level category-A standard in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) is met completely through above improved effluent index.
The operating voltage of above-mentioned electrolysis machine is 1 ~ 36V, and two interelectrode voltages are 1 ~ 3V, and current density is 5 ~ 320mA/cm 2, in step (2), the residence time of clear liquid in electrolysis machine is 30s ~ 5min.
Above-mentioned electrolysis machine is provided with power supply and electrolyzer, and the electrode in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
When adopting nano-catalytic inertia motor, the top layer of nano-catalytic noble electrode is coated with the metal oxide containing precious metals inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of nano-catalytic noble electrode is titanium plate or plastic plate.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.

Claims (9)

1. a municipal sewage plant discharge water puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that it is the former technique by existing Sewage Plant: based on sewage equalizing tank → coarse rack → fine fack → preliminary sedimentation tank → biochemistry pool → second pond → sterilization pool → discharge, between the biochemistry pool and second pond of former technique, increase flocculation sediment or after the second pond of former technique, increase flocculation-air floating operation, and change original sterilization into electrolysis process, namely increase following steps:
(1) flocculation: make B level qualified discharge water flow into flocculation tank, adds appropriate flocculation agent in flocculation tank and coagulant aids carries out flocculation reaction, enters precipitate and separate step after flocculation reaction;
(2) precipitate and separate: the sewage in step (1) after flocculation enters second pond or air flotation pool through water distributor, and carrying out precipitate and separate is clear liquid and mud;
(3) electrolysis: the clear liquid of step (2) precipitate and separate gained pumps into electrolysis in electrolysis machine, namely electrolysis water outlet reaches the emission standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A comprehensively.
2. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: step (1) described flocculation agent is aluminium salt, molysite, poly-aluminium, the one of Polyferric Sulfate or any two or more combination; Described aluminium salt is Tai-Ace S 150 or aluminum chloride; Described molysite is ferric sulfate, ferrous sulfate; Described poly-aluminium is polymerize aluminum chloride, polyaluminium sulfate or polymer aluminium silicate; Described Polyferric Sulfate is poly-ferric chloride, bodied ferric sulfate or polyferric silicate sulfate; Consumption is 1 ~ 15g/m 3.
3. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, and it is characterized in that: step (1) described coagulant aids is PAM, consumption is 1 ~ 3g/m 3.
4. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: step (1) if described flocculation time sewage pH when being less than 8, also comprise one and add sodium hydroxide or sodium carbonate, regulate the step of pH to 8 ~ 9 of sewage.
5. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: the precipitate and separate described in step (2) utilizes the second pond of existing Sewage Plant to carry out gravity settling separation.
6. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: the precipitate and separate described in step (2) is dissolved air flotation.
7. a kind of municipal sewage plant discharge water as claimed in claim 1 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: the operating voltage of described electrolysis machine is 1 ~ 36V, and two interelectrode voltages are 1 ~ 3V, and current density is 5 ~ 320mA/cm 2, in step (2), the residence time of clear liquid in electrolysis machine is 30s ~ 5min.
8. a kind of municipal sewage plant discharge water as claimed in claim 7 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: described electrolysis machine is provided with power supply and electrolyzer, the electrode in described electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and nano-catalytic noble electrode.
9. a kind of municipal sewage plant discharge water as claimed in claim 7 puies forward mark method by one-level B to one-level A comprehensively, it is characterized in that: the top layer of described nano-catalytic noble electrode is coated with the metal oxide containing precious metals inertia catalyst coatings that crystal grain is 10 ~ 35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
CN201510625417.1A 2015-09-28 2015-09-28 Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A Pending CN105174633A (en)

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CN105600884A (en) * 2016-01-04 2016-05-25 陈立义 Purifying and disinfecting method for chlorine evolution anode nano-catalysis electrolytic method tail water
CN105692827A (en) * 2016-01-22 2016-06-22 南通海陵环境检测有限公司 Composite coagulant for treating machining wastewater
CN106242129A (en) * 2016-08-05 2016-12-21 罗依依 A kind of municipal sewage plant discharge water is put forward mark method by one-level B to one-level A
CN106430744A (en) * 2016-08-05 2017-02-22 波鹰(厦门)科技有限公司 Device for improving standards of discharged water of municipal sewage treatment plant to first-level A from first-level B
CN107055942A (en) * 2017-02-16 2017-08-18 北京高徛陌科技有限公司 Recycled water and production method with bactericidal function
CN109650612A (en) * 2019-01-30 2019-04-19 西安工程大学 In a kind of processing in water nitrogen and phosphorus element method
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CN109704505A (en) * 2019-01-17 2019-05-03 大渊环境技术(厦门)有限公司 A kind of plasma effluent purification method
CN109650612A (en) * 2019-01-30 2019-04-19 西安工程大学 In a kind of processing in water nitrogen and phosphorus element method

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