CN110482786A - The method of municipal sewage treatment - Google Patents
The method of municipal sewage treatment Download PDFInfo
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- CN110482786A CN110482786A CN201910741329.6A CN201910741329A CN110482786A CN 110482786 A CN110482786 A CN 110482786A CN 201910741329 A CN201910741329 A CN 201910741329A CN 110482786 A CN110482786 A CN 110482786A
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- Prior art keywords
- flocculant
- parts
- treatment
- powder
- sewage
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- 239000010865 sewage Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 41
- 239000001923 methylcellulose Substances 0.000 claims abstract description 41
- 239000005018 casein Substances 0.000 claims abstract description 38
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 235000021240 caseins Nutrition 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 239000013049 sediment Substances 0.000 claims abstract description 14
- 238000005345 coagulation Methods 0.000 claims abstract description 13
- 230000015271 coagulation Effects 0.000 claims abstract description 13
- 244000005700 microbiome Species 0.000 claims abstract description 12
- 230000001376 precipitating effect Effects 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 7
- 241000233866 Fungi Species 0.000 claims abstract description 6
- 230000008595 infiltration Effects 0.000 claims abstract description 5
- 238000001764 infiltration Methods 0.000 claims abstract description 5
- 230000001954 sterilising effect Effects 0.000 claims abstract description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 74
- 239000000835 fiber Substances 0.000 claims description 29
- 229920000728 polyester Polymers 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 24
- 240000002853 Nelumbo nucifera Species 0.000 claims description 19
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 19
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 19
- 239000006004 Quartz sand Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000002351 wastewater Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 28
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000001717 pathogenic effect Effects 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 244000052769 pathogen Species 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 1
- 241001465805 Nymphalidae Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 229910001431 copper ion Inorganic materials 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 petroleum-type Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to technical field of sewage, inconvenient problem is salvaged for flocky precipitate, provide a kind of method of municipal sewage treatment, the technical solution is as follows: including: S1. coagulation: sewage is discharged into sedimentation basin, put into flocculant, when flocculent deposit is more, precipitating is salvaged to 55 DEG C -65 DEG C in thermal precipitation pond；S2. destroying microorganisms two stage treatment: are handled by ultraviolet sterilization；S3. tertiary treatment: investment microorganism fungus kind is decomposed；S4. level Four is handled: pressurization penetrates ultrafiltration membrane；Flocculant includes: 100 parts of polyacrylamide；15-25 parts of casein；25-35 parts of methylcellulose；10-15 parts of active carbon.By the way that methylcellulose is added in flocculant, so that after sewage is heated to 55 DEG C -65 DEG C, gel reaction occurs for methylcellulose, when so that salvaging sediment, what is salvaged is block-like sediment, being less prone in the mesh of floccule infiltration fishing net leads to the case where blocking and being difficult to clean, so that salvaging sediment is that operation is more convenient.
Description
Technical field
The present invention relates to technical field of sewage, more particularly, to a kind of method of municipal sewage treatment.
Background technique
With urban development, it is more and more to live in the sanitary sewage that people generate in city for increased population.
Sanitary sewage is the waste water being discharged in resident's daily life, is mainly derived from residential architecture and public building, is such as lived
Between residence, organ, school, hospital, shop, public place and industry hygiene etc..Pollutant contained by sanitary sewage is mainly
Organic matter (such as protein, carbohydrate, fat, urea, ammonia nitrogen) and a large amount of pathogenic microorganisms (such as parasitic ovum and enteron aisle
Virus spread etc.).The organic matter being present in sanitary sewage is extremely unstable, is easy corruption and generates stench.Bacterium and pathogen
Using organic matter in sanitary sewage as nutrition mass propagation, can lead to infectious disease from spreading prevalence.It therefore, must before sanitary sewage discharge
It must be handled.
It is usually required when sanitary sewage disposal by two stage treatment, the first order is pretreatment, is mainly used for removing sewage
In undissolved suspended solid and floating substance, it will usually use the precipitation method, but precipitate during by flocculant generate wadding
The accumulation of shape object is salvaged when more, but floccule is easy to be wrapped on fishing net, it is difficult to even blocking fishing net is removed,
Therefore there are also improve space.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of method of municipal sewage treatment, tool
The advantages of being reduced energy consumption.
To achieve the above object, the present invention provides the following technical scheme that
A kind of method of municipal sewage treatment, comprising the following steps:
S1. coagulation, specific as follows:
Sewage is discharged into sedimentation basin, flocculant is put into, the coagulation water on sedimentation basin surface layer is discharged, when wadding a quilt with cotton in sedimentation basin
When shape precipitating thickness reaches the 30% of precipitating tank depth, stop injecting new sewage, thermal precipitation pond is salvaged to 55 DEG C -65 DEG C
Precipitating is salvaged to sediment thickness after being lower than the 5% of precipitating tank depth, is continued to inject sewage and flocculant, is carried out precipitation process；
S2. two stage treatment, specific as follows:
Coagulation water is handled into the microorganism killed in coagulation water by ultraviolet sterilization；
S3. tertiary treatment, specific as follows:
Secondary treated wastewater is injected in biological treatment tank, investment microorganism fungus kind is decomposed, and tertiary treatment water is discharged；
S4. level Four is handled, specific as follows:
Tertiary treatment water is injected in device for ultrafiltration membrane to pressurize and handles to obtain level Four processing water through ultrafiltration membrane progress film infiltration；
The flocculant includes the component of following mass fraction:
100 parts of polyacrylamide；
15-25 parts of casein；
25-35 parts of methylcellulose；
10-15 parts of active carbon.
The present invention is further arranged to: the flocculant includes the component of following mass fraction:
100 parts of polyacrylamide；
20-22 parts of casein；
30-33 parts of methylcellulose；
12-13 parts of active carbon.
By using above-mentioned technical proposal, by the way that methylcellulose is added in flocculant so that sewage be heated to 55 DEG C-
After 65 DEG C, gel reaction occurs for methylcellulose, so that cotton-shaped sediment agglomerates into one piece of block g., jelly-like, sinks so that salvaging
When starch, salvaging is block-like sediment, and being less prone in the mesh of floccule infiltration fishing net causes to block and be difficult to
The case where washing, so that salvaging sediment is that operation is more convenient；
By two stage treatment, so that the bacterium, pathogen microorganism a part in sewage are killed, due to tertiary treatment
When, usually outdoor progress, reduce secondary sewage and volatilizes the micro- life of a large amount of bacteriums, pathogen when carrying out tertiary treatment
Object reduces the pollution to environment, while reducing to influence biological near sewage treatment region；
It is handled by level Four, so that sewage water filtration degree is higher, reduces the pollution to environment；
By the way that casein is added in flocculant, in conjunction with the metal ion in sewage and precipitated using casein, so that
Concentration of metal ions decline in sewage, so that wastewater purifying efficiency is more preferably；
By the way that active carbon is added in flocculant, so that adsorption effect is more preferably, while active carbon also adsorbs floccule, so that
G., jelly-like colloid more bulk when gel, the case where being less prone to a large amount of little particle colloids, so that better effect when salvaging.
The present invention is further arranged to: the flocculant further includes the component of following mass fraction:
3-6 parts of lotus leaf powder.
The hydrophobic of flocky precipitate is improved by the way that lotus leaf powder is added in flocculant by using above-mentioned technical proposal
Property, when so that sediment being wrapped up by filter cloth and squeezed to squeeze the water out to form filter cake, moisture is easily isolated, and is operated more square
Just.
The present invention is further arranged to: the flocculant further includes the component of following mass fraction:
4-8 parts of quartz sand.
By using above-mentioned technical proposal, by the way that quartz sand is added in flocculant, so that the density of flocculant increases, make
It obtains flocky precipitate settling velocity to accelerate, and then improves the efficiency of precipitating.
The present invention is further arranged to: the flocculant further includes the component of following mass fraction:
12-16 parts of polyester fiber；
The length of the polyester fiber is 3-5mm.
By using above-mentioned technical proposal, by the way that polyester fiber is added in flocculant, so that scattered flocculent deposit
Object is easy to be wound by polyester fiber, is not easy transition separation, is easily formed the flocky precipitate of bulk, solidifying to be formed in heating sewage
When glue, it is more likely formed big block-like gel piece, is easy to salvage.
The present invention is further arranged to: the flocculant further includes the component of following mass fraction:
5-8 parts of sodium peroxide.
By using above-mentioned technical proposal, by the way that sodium peroxide is added in flocculant, water is met by sodium peroxide
Chemical reaction generates sodium hydroxide and oxygen, and then generates bubble, makes flocculant be easier to disperse in sewage using bubble
It is even, so that the better effect of sundries in flocculant precipitating sewage and more efficient.
The present invention is further arranged to: the sedimentation basin inner wall is covered with heat-conducting layer, and the heat-conducting layer is connected with underwater electricity
Heating member.
It is thermally conductive by heat-conducting layer by using above-mentioned technical proposal, so that heating temperature is distributed more uniform, heating effect
Preferably, so that forming the better effect of gel, speed in sewage faster.
The present invention is further arranged to: the flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are ground to the powder that partial size is 10-100nm；
B. Polyacrylamide Powder, casein powder, methylcellulose powder, active carbon powder are stirred evenly to be formed it is pre-
Mixed object；
C. pre-composition is pressed into granular flocculant.
By using above-mentioned technical proposal, by the way that polyacrylamide, casein, methylcellulose, active carbon are ground into
Nanometer powder guarantees the quality of flocculant so that each raw material are uniformly dispersed；
By being pressed into granular flocculant so that flocculant be convenient for carrying also facilitate dispensing operate, be readily transported with
It uses.
In conclusion the invention has the following advantages:
1. by the way that methylcellulose is added in flocculant, so that after sewage is heated to 55 DEG C -65 DEG C, methylcellulose hair
Raw gel reaction, when so that salvaging sediment, salvaging is block-like sediment, is less prone to the net that floccule penetrates into fishing net
Lead to the case where blocking and being difficult to clean in hole, so that salvaging sediment is that operation is more convenient；
2. by two stage treatment, so that the bacterium, pathogen microorganism a part in sewage are killed, due to tertiary treatment
When, usually outdoor progress, reduce secondary sewage and volatilizes the micro- life of a large amount of bacteriums, pathogen when carrying out tertiary treatment
Object reduces the pollution to environment, while reducing to influence biological near sewage treatment region；
3. meeting water by the way that sodium peroxide is added in flocculant by sodium peroxide and chemical reaction generation sodium hydroxide occurring
And oxygen, and then bubble is generated, make flocculant be easier to be uniformly dispersed in sewage using bubble, so that flocculant precipitates sewage
In the better effect of sundries and more efficient.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for municipal sewage treatment in the present invention.
Specific embodiment
With reference to the accompanying drawings and embodiments, invention is further described in detail.
In following embodiment, polyacrylamide uses the polyacrylamide of Renqiu City Ke Wei Chemical Co., Ltd. sale.
In following embodiment, casein uses the casein of Henan Yan Kang food additives Co., Ltd sale.
In following embodiment, methylcellulose uses the methylcellulose of Shandong You Suo Chemical Industry Science Co., Ltd sale
MC。
In following embodiment, active carbon uses the sewage treatment sold using the equal active carbon Co., Ltd in Guangdong with wooden
Powdery carbon.
In following embodiment, lotus leaf powder uses the lotus leaf powder of Xuzhou the Nature Food Co., Ltd sale.
In following embodiment, quartz sand uses the quartz sand of the pure and fresh material for water treatment Co., Ltd sale in Gongyi City.
In following embodiment, polyester fiber uses the JZXW polyester fiber of Changzhou Bo Chao engineering material Co., Ltd sale.
In following embodiment, sodium peroxide uses the sodium peroxide of Zhengzhou Shuan Chen commerce and trade Co., Ltd sale.
Embodiment 1
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are separately added into grinder and are ground to 10-100nm
Powder；
B. Polyacrylamide Powder 100kg, casein powder 15kg, methylcellulose powder are added in a stirring kettle
25kg, active carbon powder 10kg are passed through nitrogen, and air is discharged, and revolving speed 75r/min stirs 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Embodiment 2
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are separately added into grinder and are ground to 10-100nm
Powder；
B. Polyacrylamide Powder 100kg, casein powder 20kg, methylcellulose powder are added in a stirring kettle
30kg, active carbon powder 12kg are passed through nitrogen, and air is discharged, and revolving speed 75r/min stirs 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Embodiment 3
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are separately added into grinder and are ground to 10-100nm
Powder；
B. Polyacrylamide Powder 100kg, casein powder 22kg, methylcellulose powder are added in a stirring kettle
33kg, active carbon powder 13kg are passed through nitrogen, and air is discharged, and revolving speed 75r/min stirs 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Embodiment 4
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are separately added into grinder and are ground to 10-100nm
Powder；
B. Polyacrylamide Powder 100kg, casein powder 25kg, methylcellulose powder are added in a stirring kettle
35kg, active carbon powder 15kg are passed through nitrogen, and air is discharged, and revolving speed 75r/min stirs 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Embodiment 5
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are separately added into grinder and are ground to 10-100nm
Powder；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, active carbon powder 12kg are passed through nitrogen, and air is discharged, and revolving speed 75r/min stirs 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Embodiment 6
A kind of flocculant, flocculant the preparation method is as follows:
A. by polyacrylamide, casein, methylcellulose, active carbon, lotus leaf powder, quartz sand, polyester fiber, peroxidating
Sodium is separately added into the powder that 10-100nm is ground in grinder；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, active carbon powder 12kg, lotus leaf powder 3kg, quartz sand 4kg, polyester fiber 12kg, sodium peroxide 5kg, are passed through nitrogen, row
Air out, revolving speed 75r/min stir 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 3mm in the present embodiment.
Embodiment 7
A kind of flocculant, flocculant the preparation method is as follows:
A. by polyacrylamide, casein, methylcellulose, active carbon, lotus leaf powder, quartz sand, polyester fiber, peroxidating
Sodium is separately added into the powder that 10-100nm is ground in grinder；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, active carbon powder 12kg, lotus leaf powder 4kg, quartz sand 6kg, polyester fiber 14kg, sodium peroxide 6kg, are passed through nitrogen, row
Air out, revolving speed 75r/min stir 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 4mm in the present embodiment.
Embodiment 8
A kind of flocculant, flocculant the preparation method is as follows:
A. by polyacrylamide, casein, methylcellulose, active carbon, lotus leaf powder, quartz sand, polyester fiber, peroxidating
Sodium is separately added into the powder that 10-100nm is ground in grinder；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, active carbon powder 12kg, lotus leaf powder 6kg, quartz sand 8kg, polyester fiber 16kg, sodium peroxide 8kg, are passed through nitrogen, row
Air out, revolving speed 75r/min stir 5min, form pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 5mm in the present embodiment.
Embodiment 9
A kind of flocculant, flocculant the preparation method is as follows:
A. by polyacrylamide, casein, methylcellulose, active carbon, lotus leaf powder, quartz sand, polyester fiber, peroxidating
Sodium is separately added into the powder that 10-100nm is ground in grinder；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, active carbon powder 12kg, lotus leaf powder 5.5kg, quartz sand 7kg, polyester fiber 15kg, sodium peroxide 7kg, are passed through nitrogen,
Air is discharged, revolving speed 75r/min stirs 5min, forms pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 3.5mm in the present embodiment.
Embodiment 10
A kind of method of municipal sewage treatment, referring to Fig.1, comprising the following specific steps
S1. coagulation, specific as follows:
Municipal sewage is discharged into sedimentation basin, according to sewage: flocculant=10:1 ratio puts into flocculant；
Flocculant uses the flocculant of embodiment 9 in the present embodiment, and the flocculation of embodiment 1-8 can be used in other embodiments
Agent；
In the present embodiment, the solvent of sedimentation basin is 100m3Sewage injection rate is controlled in 20m3/h；
Sedimentation basin top side wall is communicated with overflow pipe, and coagulation water is discharged by overflow pipe；
When flocky precipitate thickness reaches the 30% of precipitating tank depth in sedimentation basin, stop injecting new sewage；
Sedimentation basin inner wall is pasted with heat-conducting layer, and heat-conducting layer is made of copper, and several underwater electric heating are fixedly connected on heat-conducting layer
Piece；
In the present embodiment, generated heat by underwater electric heating piece with the sewage in thermal precipitation pond to 60 DEG C, in other embodiments
Sewage can be heated to 55 DEG C or 65 DEG C etc.；
Gel reaction occurs for flocky precipitate, salvages blocky gel precipitate, salvages to sediment thickness and be lower than sedimentation basin
After depth 5%, continue to inject sewage and flocculant to continue precipitation process；
What it is due to salvaging is blocky gel precipitate, is less prone to flocky precipitate and blocks the mesh of fishing net and cotton-shaped
Sediment remains in the case where being difficult to clean off on fishing net, so that fishing is more convenient.
S2. two stage treatment, specific as follows:
Coagulation water is injected in second level pond, is closed at the top of second level pond by aluminium foil, several purples are installed in second level pond
Outer lamp opens ultraviolet lamp and kills the microorganism in coagulation water, so that bacterium, pathogenic microbes quantity are greatly decreased, subtracts
Surrounding biologic is impacted when few subsequent processing.
S3. tertiary treatment, specific as follows:
Secondary treated wastewater is injected in biological treatment tank, microorganism fungus kind is put into, by microorganism fungus kind to two stage treatment
Organic matter in water is decomposed, and tertiary treatment water, discharge tertiary treatment water to next stage processing step are formed.
The sweet degree composite bacteria that microorganism fungus kind uses Beijing Gan Du environmental protection technology Co., Ltd to sell in the present embodiment.
S4. level Four is handled, specific as follows:
Tertiary treatment water is injected in device for ultrafiltration membrane, last filtering is carried out through ultrafiltration membrane by pressurization, passes through infiltration
Processing obtains level Four and handles water thoroughly.
Comparative example 1
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, methylcellulose, active carbon, lotus leaf powder, quartz sand, polyester fiber, sodium peroxide are distinguished
It is added in grinder and is ground to the powder of 10-100nm；
B. Polyacrylamide Powder 100kg, methylcellulose powder 32kg, active carbon powder are added in a stirring kettle
12kg, lotus leaf powder 5.5kg, quartz sand 7kg, polyester fiber 15kg, sodium peroxide 7kg are passed through nitrogen, and air, revolving speed is discharged
75r/min stirs 5min, forms pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 3.5mm in this comparative example.
Comparative example 2
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, active carbon, lotus leaf powder, quartz sand, polyester fiber, sodium peroxide are separately added into
The powder of 10-100nm is ground in grinder；
B. in a stirring kettle be added Polyacrylamide Powder 100kg, casein powder 21.5kg, active carbon powder 12kg,
Lotus leaf powder 5.5kg, quartz sand 7kg, polyester fiber 15kg, sodium peroxide 7kg, are passed through nitrogen, are discharged air, revolving speed 75r/min,
5min is stirred, pre-composition is formed；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 3.5mm in this comparative example.
Comparative example 3
A kind of flocculant, flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, lotus leaf powder, quartz sand, polyester fiber, sodium peroxide are distinguished
It is added in grinder and is ground to the powder of 10-100nm；
B. Polyacrylamide Powder 100kg, casein powder 21.5kg, methylcellulose powder are added in a stirring kettle
32kg, lotus leaf powder 5.5kg, quartz sand 7kg, polyester fiber 15kg, sodium peroxide 7kg are passed through nitrogen, and air, revolving speed is discharged
75r/min stirs 5min, forms pre-composition；
C. pre-composition is discharged into pelletizer and is pressed into granular flocculant.
Polyester fiber length is 3.5mm in this comparative example.
Experiment 1
The suspension in the sewage before flocculant is added is detected according to GB11901-89 " the measurement gravimetric method of water quality suspended matter "
Object content a (mg/L), then the purified processed dirt of flocculant of embodiment 1-9 and comparative example 1-3 is added in detection respectively
Suspension content b (mg/L) in water calculates the removal rate (%) of suspended matter according to (a-b/a) * 100%.
Experiment 2
Flocculant using atomic absorption spectrography (AAS) detection embodiment 1-9 and comparative example 1-3 is purified processed
Copper ions in sewage, zinc ion, manganese ion, chromium ion content.
Experiment 3
The level Four that embodiment 10 is discharged is detected according to GB18918-2002 " urban wastewater treatment firm pollutant emission standard "
COD (COD), biochemical oxygen demand (BOD) (BOD in processing water5), suspended matter (SS), vegetable and animals oils, petroleum-type, anion
Surfactant, total nitrogen (in terms of N), ammonia nitrogen (in terms of N), total phosphorus (in terms of P), coloration (extension rate), PH, excrement colibacillus group
Number/(a/L).
Specific experiment data are shown in Table 1 and table 2
Table 1
Table 2
| Embodiment 10 | |
| COD (COD) | 38.2mg/L |
| Biochemical oxygen demand (BOD) (BOD5) | 8.9 |
| Suspended matter (SS) | 7.8 |
| Vegetable and animals oils | 0.85 |
| Petroleum-type | 0.76 |
| Anionic surfactant | 0.33 |
| Total nitrogen (in terms of N) | 12.8 |
| Ammonia nitrogen (in terms of N) | 4.6 |
| Total phosphorus (in terms of P) | 0.32 |
| Coloration (extension rate) | 30 |
| PH | 8.4 |
| Excrement colibacillus group number/(a/L) | 9.7x102 |
It can be obtained according to table 1, active carbon, which is added, can effectively improve the effect of suspended matter in flocculant absorption effluent, so that suspending
The sedimentation effect of object is improved, so that wastewater treatment efficiency is more preferably.
Casein is added, can effectively in conjunction with the metal ion in sewage so that metal ion in sewage preferably by
It disposes, metal ions in sewage concentration is reduced, so that wastewater treatment efficiency is more preferably.
Methylcellulose and casein is added, the effect of flocculant absorption suspended matter is had no significant effect.
It can be obtained according to table 2, discharge mark is met according to the sewage that the method for the municipal sewage treatment of embodiment 10 is handled
Standard, significant effect.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of method for the treatment of city waste water, it is characterized in that: the following steps are included:
S1. coagulation, specific as follows:
Sewage is discharged into sedimentation basin, flocculant is put into, discharges the coagulation water on sedimentation basin surface layer, when cotton-shaped heavy in sedimentation basin
When shallow lake thickness reaches the 30% of precipitating tank depth, stopping injecting new sewage, precipitating is salvaged to 55 DEG C -65 DEG C in thermal precipitation pond,
It salvages to sediment thickness after being lower than the 5% of precipitating tank depth, continues to inject sewage and flocculant, carry out precipitation process；
S2. two stage treatment, specific as follows:
Coagulation water is handled into the microorganism killed in coagulation water by ultraviolet sterilization；
S3. tertiary treatment, specific as follows:
Secondary treated wastewater is injected in biological treatment tank, investment microorganism fungus kind is decomposed, and tertiary treatment water is discharged；
S4. level Four is handled, specific as follows:
Tertiary treatment water is injected in device for ultrafiltration membrane to pressurize and handles to obtain level Four processing water through ultrafiltration membrane progress film infiltration；
The flocculant includes the component of following mass fraction:
100 parts of polyacrylamide；
15-25 parts of casein；
25-35 parts of methylcellulose；
10-15 parts of active carbon.
2. method for the treatment of city waste water according to claim 1, it is characterized in that: the flocculant includes following mass fraction
Component:
100 parts of polyacrylamide；
20-22 parts of casein；
30-33 parts of methylcellulose；
12-13 parts of active carbon.
3. method for the treatment of city waste water according to claim 2, it is characterized in that: the flocculant further includes following mass parts
Several components:
3-6 parts of lotus leaf powder.
4. method for the treatment of city waste water according to claim 2, it is characterized in that: the flocculant further includes following mass parts
Several components:
4-8 parts of quartz sand.
5. method for the treatment of city waste water according to claim 2, it is characterized in that: the flocculant further includes following mass parts
Several components:
12-16 parts of polyester fiber；
The length of the polyester fiber is 3-5mm.
6. method for the treatment of city waste water according to claim 2, it is characterized in that: the flocculant further includes following mass parts
Several components:
5-8 parts of sodium peroxide.
7. method for the treatment of city waste water according to claim 1, it is characterized in that: the sedimentation basin inner wall be covered with it is thermally conductive
Layer, the heat-conducting layer are connected with underwater electric heating part.
8. method for the treatment of city waste water according to claim 2, it is characterized in that: the flocculant the preparation method is as follows:
A. polyacrylamide, casein, methylcellulose, active carbon are ground to the powder that partial size is 10-100nm；
B. it stirs evenly Polyacrylamide Powder, casein powder, methylcellulose powder, active carbon powder to form premix
Object；
C. pre-composition is pressed into granular flocculant.
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