CN106495414B - A kind of city sewage deep treatment method - Google Patents
A kind of city sewage deep treatment method Download PDFInfo
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- CN106495414B CN106495414B CN201611150472.0A CN201611150472A CN106495414B CN 106495414 B CN106495414 B CN 106495414B CN 201611150472 A CN201611150472 A CN 201611150472A CN 106495414 B CN106495414 B CN 106495414B
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- sludge
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- treatment method
- deep treatment
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- 239000010865 sewage Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 75
- 239000010802 sludge Substances 0.000 claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000018044 dehydration Effects 0.000 claims abstract description 17
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000004332 deodorization Methods 0.000 claims abstract description 13
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 8
- 230000001954 sterilising effect Effects 0.000 claims abstract description 8
- 230000008021 deposition Effects 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- ZHLKXBJTJHRTTE-UHFFFAOYSA-N Chlorobenside Chemical class C1=CC(Cl)=CC=C1CSC1=CC=C(Cl)C=C1 ZHLKXBJTJHRTTE-UHFFFAOYSA-N 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 239000011593 sulfur Substances 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 6
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 6
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000003311 flocculating effect Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- DKFCNIGGENJIJN-UHFFFAOYSA-L aluminum;iron(2+);sulfate Chemical compound [Al+3].[Fe+2].[O-]S([O-])(=O)=O DKFCNIGGENJIJN-UHFFFAOYSA-L 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 3
- 229960002218 sodium chlorite Drugs 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- JXAZAUKOWVKTLO-UHFFFAOYSA-L sodium pyrosulfate Chemical group [Na+].[Na+].[O-]S(=O)(=O)OS([O-])(=O)=O JXAZAUKOWVKTLO-UHFFFAOYSA-L 0.000 claims description 3
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 2
- 230000001877 deodorizing effect Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 26
- 238000012545 processing Methods 0.000 description 18
- 239000010801 sewage sludge Substances 0.000 description 9
- 238000004062 sedimentation Methods 0.000 description 8
- 244000005700 microbiome Species 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003672 processing method Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 241000255925 Diptera Species 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000010842 industrial wastewater Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010954 inorganic particle Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920000715 Mucilage Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 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 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000004090 dissolution 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
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011090 industrial biotechnology method and process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 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
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000012360 testing method 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical 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
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- 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
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
-
- 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
Abstract
The invention discloses a kind of city sewage deep treatment methods, comprising the following steps: step 1: sewage being cleaned by grid, sand setting, primary deposition, biological treatment and secondary precipitation are so that sewage and sludge initial gross separation；Step 2: sewage will be handled using the method for physics, chemistry or biology through step 1 treated sewage, discharge index discharge is reached after disinfection and sterilization；Step 3: will carry out physical wall breaking using grinding through step 1 treated sludge, then carry out chemical broken wall deodorization by chemical reagent, last filter-press dehydration, the sludge discharge after filters pressing, and the water after recycling filters pressing is handled with step 2 again.Using the present invention, can effective deodorizing sterilizing, the moisture content of sludge substantially reduces, and operating cost is low.
Description
Technical field
The present invention relates to the technical field of sewage treatment more particularly to a kind of city sewage deep treatment methods.
Background technique
Municipal sewage is all drainings being collected by sewer pipe, is the various lives dirt for being discharged into sewer pipeline system
The mixing water of water, industrial wastewater and urban rainfall runoff.Sanitary sewage is the water being discharged in people's daily life, this kind of sewage
Water quality characteristics be containing higher organic matter, such as starch, protein, grease and nitrogen, phosphorus, etc. inorganic matters, in addition, also
Contain pathogenic microorganism and more suspended matter.It is compared to industrial wastewater, the water quality of sanitary sewage is generally more stable, concentration
It is lower.Industrial wastewater is the waste water being discharged in production process, including production technology waste water, recirculated cooling water, flushing waste water and
Comprehensive wastewater.Due to various industrial techniques, raw material, using the difference of the watering condition of equipment etc., industrial wastewater
Property is multifarious.Rainfall runoff is formed by precipitation or ice dissolution.For laying sewage conduct and storm sewer respectively
City, rainfall runoff import storm sewer, for using rain sewage combined sewerage pipeline city, can make rainfall runoff with
Municipal sewage is pocessed together.
Existing urban sewage treatment process process is as shown in Figure 1, municipal sewage retains biggish floating material by grid
Or suspended matter, the biggish inorganic particle of specific gravity is stayed in bottom of pond by aerated grit chamber and primary sedimentation pond, recycles microorganism
Metabolism convert innocuous substance for organic pollutant, by secondary sedimentation tank remove biological treatment process in produced by
, with biology cast existing for sludge form or dead organism.Collect aerated grit chamber, primary sedimentation pond and two
The pool bottom sludge of secondary sedimentation basin carries out Treatment of Sludge and is allowed to meet discharge standard.
The step of Treatment of Sludge: sending sludge into sludge concentration tank first, uses sedimentation, gas floatation process or centrifugal process to drop
Low moisture percentage in sewage sludge and reduction sludge volume；Enter mud storage pool, conditioning of mud amount and added amount of chemical after sludge condensation；Then,
It is digested under aerobic or anaerobic condition, so that volatile content is reduced to solid and be relatively not easy to rot and do not send out evil
Sludge when smelly；Finally, the primary of fluidised form, concentration or digested sludge are removed moisture, it is converted into semisolid or solid-state clod.Through
After crossing dehydration, moisture percentage in sewage sludge can be reduced to 80% or so.Dewatered sludge moisture content is high, is not easy to recycle, and fills land occupation amount
Greatly.And sludge itself is dehydrated difficulty, and difficult desiccation recycles desiccation at high cost, and landfill generates percolate.And there is biggish stench
Taste attracts mosquito, pollutes environment.
There is no special deodorization process when municipal sewage treatment, the sludge generated in sewage disposal process is with smelly
Taste, this is because such as bacterium, protozoan and algae microorganism are contained in sludge, by long-term procreation so that sludge
It fouls.Nowadays the deodorization mode generallyd use is sludge mesophilic anaerobic digestion technique (at a kind of sludge of such as CN104163553A
Reason method), however the metabolic conversion time of microorganism is long, the methane and carbon dioxide tolerance of generation is few, is unfavorable for quickly handling
Sludge.
In addition to this, the moisture content of municipal sludge is up to 80% or more, after untreated sludge directly fills, landfill yard
Earth's surface will form marsh shape, and moisture content therein can slowly escape through the sludge leachate contamination water source and soil to form severe toxicity.Not
The sludge of processing is difficult by resource utilization, because water content is too high, as long as generating transport, means greatly to transport
Cost (water content 80% or so) on moisture content.And be sposh, it is created great difficulties to transport.One of maximum of sludge
Utilization orientation be power generation by waste combustion, and the moisture percentage in sewage sludge not handled is too high, to waste very big thermal energy in evaporation water.
The processing operating cost of sludge is high.Currently, traditional method is improved by dosing coagulant, flocculation aid,
Then mechanical dehydration is handled, and is formed the walk outward transport that moisture content is 80% or so and is carried out sanitary landfills, burning disposal, fermentation system
Fertilizer, this mode is because the too high surrounding enviroment to landfill yard of moisture content bring extremely disadvantageous influence or ability need to be further dried
Into incinerator processing and the system fertilizer that ferments.However the moisture percentage in sewage sludge after mechanical dehydration is very high the reason is that biological in sludge
Cell and colloid, which contain a large amount of " Interstitial Water ", all to be squeezed out by the pressure that tradition machinery is dehydrated, while moisture percentage in sewage sludge
It is in mucilage shape at 80% or so, hydrone is wrapped up by one layer of colloid, this region is referred to as " the viscose glue phase region " of sludge, is dirty
Mud is dehydrated the stage being most difficult to, and is difficult further to remove with the method for traditional mechanical dehydration.So, it is necessary to it is special to take
Means crack intercellular structure and sludge " viscose glue phase region ", so that part " Interstitial Water " is discharged, then pass through mechanism filter-pressing
Mode filters out.Existing wall breaking technology generally has the technology of high temperature drying technique, machinery and ultrasonic wave, Strong oxdiative medicament broken wall skill
Art.High temperature drying technique generates the harmful exhausts such as dioxin in sludge handling process, generates secondary pollution to environment.With machinery
Breaking-wall cell is carried out with the technology of ultrasonic wave, other than equipment investment is larger, when operation also needs to consume a large amount of electric power.So
Operating cost is big.Sludge cell wall breakage method is carried out using Strong oxdiative medicament, since the sludge concentration of 80% moisture content is high, medicament
It is difficult sufficiently to be merged, additive amount is big, and cost is also high.It, may subsequent processing band to sludge because after joined chemical agent
Unfavorable factor is carried out.
Therefore, sludge removes when it is urgent to provide a kind of processing methods of new municipal sewage to solve existing municipal sewage treatment
The smelly time is long, the difficult technical problem of dehydration decrement.
Summary of the invention
Technical problem to be solved by the present invention lies in, a kind of city sewage deep treatment method is provided, it is dirty after processing
The moisture content of mud substantially reduces, and drying and dehydrating speed is fast.
The technical problems to be solved by the invention also reside in, and provide a kind of city sewage deep treatment method, can effectively remove
Smelly sterilization, sludge do not attract mosquito.
The technical problems to be solved by the invention also reside in, and provide a kind of city sewage deep treatment method, processed
Sewage can reach national sewage discharge level-one A standard.
In order to solve the above-mentioned technical problems, the present invention provides a kind of city sewage deep treatment methods, including following step
It is rapid:
Step 1: sewage is cleaned by grid, sand setting, primary deposition, biological treatment and secondary precipitation are so that sewage
With sludge initial gross separation；
Step 2: sewage will be handled using the method for physics, chemistry or biology through step 1 treated sewage, disinfection is killed
Reach discharge index discharge after bacterium；
Step 3: physical wall breaking will be carried out using grinding through step 1 treated sludge, then passes through chemical reagent progress
Chemical broken wall deodorization, last filter-press dehydration, the sludge discharge after filters pressing, the water after recycling filters pressing are handled with step 2 again.
As the optimal technical scheme of the city sewage deep treatment method, the step 3 specifically includes following step
It is rapid:
A. the mud being collected into is sent into collecting pit, then the biggish particle of partial size in mud is removed by vibrating screen；
B. the mud after vibrating shaker is sent into stirring stock tank, and quantitative slurry is pumped by mud and is put into grinder
It is ground, broken wall；
C. the mud after grinding is sent into reaction tank, chloracid salt is first added, add sulfur-containing compound, chloride containing closes
Object or polymeric oxides remove the stink in mud, finally using in weak base and mud；
D. flocculating setting agent is added in mud assembles the mud granule in mud；
E. mud after settlement is dehydrated the dirt after filters pressing so that the moisture content of sludge is down to 25-60% by filter press
Mud discharge, the water after recycling filters pressing are handled with step 2 again.
As the optimal technical scheme of the city sewage deep treatment method, the chloracid salt in the step c is chlorine
One of sour sodium, sodium chlorite and sodium hypochlorite or combination.
As the optimal technical scheme of the city sewage deep treatment method, sulfur-containing compound described in the step c
For sodium pyrosulfate, one of sodium peroxydisulfate, aluminum sulfate, ferric sulfate, polyaluminium sulfate, bodied ferric sulfate, polymeric aluminum sulfate iron
Or combination.
As the optimal technical scheme of the city sewage deep treatment method, chlorine-containing compound described in the step c
For one of aluminium chloride, iron chloride, sodium chloride, aluminium polychloride, poly-ferric chloride, polyaluminum ferric chloride or combination.
As the optimal technical scheme of the city sewage deep treatment method, polymeric oxides described in the step c
For one of polymer alumina, polymerization oxidation iron, polymerization oxidation ferro-aluminum or combination.
As the optimal technical scheme of the city sewage deep treatment method, the chloracid salt, contains sulfur-containing compound
The additional amount of chlorine compound or polymeric oxides is the 0.001-0.5% that collecting pit collects sludge weight.
As the optimal technical scheme of the city sewage deep treatment method, the vibrating screen mesh mesh number is 10-60
Mesh.
As the optimal technical scheme of the city sewage deep treatment method, the grinder includes ball mill, is crushed
Machine and sand mill.
The implementation of the embodiments of the present invention has the following beneficial effects:
City sewage deep treatment method of the present invention improves existing mud discharging processing method, using physical grinding broken wall
It is combined with chemical deodorizing broken wall, reduces sludge returning, realized the broken wall of coated structure, pass through chemical reagent and broken wall
Sludge afterwards comes into full contact with, and deodorizing effect is significant, and then filter-press dehydration makes the moisture content of sludge be down to 25-60%, after processing
Sludge is faster than drying and dehydrating speed before processing.And it can reach through treated the sewage detection discovery of sewage discharge processing module
National sewage discharge level-one A standard.
The workflow simple possible of entire sewage disposal system, without hot conditions and expensive large-scale instrument, operation
It is at low cost；Also it is generated without new pollutant, avoids secondary pollution；It is environmentally protective, securely and reliably.And handle after sludge without
Smelly, moisture content is low, greatly reduces the volume of sludge, saves sludge freight and processing landfill land used.
Detailed description of the invention
Fig. 1 is existing urban sewage treatment system process flow chart；
Fig. 2 is a kind of process flow chart of city sewage deep treatment method of the present invention；
Fig. 3 is a kind of another process flow chart of city sewage deep treatment method of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
City sewage deep treatment method of the present invention is on the basis of existing sewage water treatment method, for the prior art
Sludge deodorization, bactericidal effect are poor, and the high disadvantage of moisture percentage in sewage sludge improves method for sludge treatment.
As shown in Fig. 2, the present invention provides a kind of city sewage deep treatment method, comprising the following steps:
S100 cleans sewage by grid, sand setting, primary deposition, biological treatment and secondary precipitation so that sewage with
Sludge initial gross separation.
Grid removal of impurities: in sewage treatment facility entrance, it is necessary to grid is set, mainly using physical treatment process retention compared with
Big floating material or suspended matter enables to run well to mitigate the load of subsequent processing structures.
Sediment by aeration: this process is generally located in grid removal of impurities below, it is therefore an objective to remove the biggish inorganic particle of specific gravity.
Primary deposition: primary sedimentation tank has preferable removal effect to inorganic matter, is generally located in front of biological treatment structures.
Bio-aeration: will be in the organic pollutant turn of dissolubility, colloidal state in sewage using the metabolism of microorganism
Innocuous substance is turned to, to reach the requirement of discharge.
Secondary precipitation: the major function of secondary precipitation be in removal biological treatment process caused by, deposited with sludge form
Biological cast or dead organism.
It all will appear what particle in water settled in above-mentioned process flow during sediment by aeration, primary deposition and secondary precipitation
Process realizes the purpose that sewage is separated with sludge to form sludge in bottom of pond.The discharge being had nothing in common with each other due to sewage and sludge
Standard and processing method, therefore sewage and sludge are separately handled below by S101 and S102 step.
Sewage after S100 step process is handled sewage using the method for physics, chemistry or biology by S101, and disinfection is killed
Reach discharge index discharge after bacterium.
The method that the sewage through separating uses physics, chemistry or biology is handled to reach row in the S101 step
Put index.Detection discovery, sewage processed by the invention can reach national sewage discharge level-one A standard (GB 18918-2002),
Disposed of in its entirety cost is 1/5th or so of conventional desliming cost of sewage disposal.
Sludge after S100 step process is carried out physical wall breaking using grinding, then is carried out by chemical reagent by S102
Chemical broken wall deodorization, last filter-press dehydration, the sludge discharge after filters pressing, the water after recycling filters pressing use S101 step process again.
Existing urban sewage treatment system generally for precipitating collect obtained sludge directly adopt sedimentation, gas floatation process or
Centrifugal process is to reduce moisture percentage in sewage sludge and reduce sludge volume, then is carried out dehydrating, and the moisture content of sludge is when finally discharging
80%, deodorization process is digested under aerobic or anaerobic condition, and volatile content in sludge is made to be reduced to solid sludges phase
Not perishable over the ground and do not stink of, such deodorization process digestion period is long, and deodorizing effect is bad, is unfavorable for quickly handling dirty
Mud.
Researcher has found that the main reason for sludge moisture content after mechanical dehydration is high is because of biological cells in sludge and glue
Body, which contains a large amount of " Interstitial Water ", all to be squeezed out by the pressure that tradition machinery is dehydrated, while moisture percentage in sewage sludge is 80%
It is in mucilage shape when left and right, hydrone is wrapped up by one layer of colloid, and it is sludge dewatering that this region, which is referred to as " the viscose glue phase region " of sludge,
The stage being most difficult to is difficult further to remove with the method for traditional mechanical dehydration.
For this purpose, the present inventor is obtained in detail below by cleverly design process flow and repetition test day and night
Technical thought:
The sludge that Treatment of Sludge is collected in the present invention is mud, and the moisture content of mud reaches 80-98%, at this time due to
Moisture content is high, and the good fluidity of mud, mud granule may be homogenously dispersed in water.And the biggish particle of partial size is screened through vibrating screen
After remove, filtered mud is put into grinder and is ground, on the one hand, can reduce the partial size of particle in mud；Another party
Face, the better mud of mobility is easier to realize under the high frequency grinding of grinder breaks the above-mentioned packet formed by mud granule and water
Wrap up in type structure, allow hydrone can separate out, be separated from mud granule.What the deodorization reagent that the later period is added was manufactured from broken wall
Wound comes into full contact with mud granule, the significant effect of deodorizing sterilizing.It is dehydrated finally by conventional filter-pressing process, sludge is at this time
Moisture content down to 25-60%, far below the moisture content of sludge 80% or so after the processing of existing sludge treatment technique.
It should be noted that the grinder includes the ball millings such as ball mill, crusher, sand mill and crushing plant, depending on
The specific character of sludge carries out corresponding selection.
As shown in Fig. 2, the preferred embodiment of city sewage deep treatment method of the present invention, comprising the following steps:
S200 cleans sewage by grid, sand setting, primary deposition, biological treatment and secondary precipitation so that sewage with
Sludge initial gross separation.
Sewage after S200 step process is handled sewage using the method for physics, chemistry or biology by S201, and disinfection is killed
Reach discharge index discharge after bacterium.
The mud being collected into is sent into collecting pit by S202, then removes the biggish particle of partial size in mud by vibrating screen.
Present invention sludge source to be dealt with is the sludge that each sedimentation basin bottom of pond is collected in sewage disposal process, has and contains
The features such as water rate is high, and microorganism is more, and taste is smelly, processing cost height and difficult dehydration.The mud decrement effect difference of the prior art be because
Traditional wall breaking technology is difficult to destroy the coated structure of sludge, therefore Direct Dehydration is difficult.The present invention does not carry out directly but dense
Contracting dehydration, makes mud moisture content be retained in 80-98%(depending on the sludge character of different regions), the good fluidity of mud, dirty at this time
Mud particle can be well dispersed in water, so as to the grinding of next step mud.
Mud after vibrating shaker is sent into stirring stock tank by S203, and pumps quantitative slurry investment grinding by mud
It is ground in machine, broken wall.
There is also the biggish particle of some partial sizes in mud, the large-size particle such as investment grinder, which can seriously affect, to be ground
The step for grinding effect, therefore being arranged is for removing the biggish particle of partial size in mud, specifically, according to the property of different sludge
The vibrating screen mesh mesh number within the scope of 10-60 mesh may be selected in shape.
The biggish particle of the partial size screened out is sent to slag bath, and filtered mud is then sent to stirring stock tank, in lasting stirring
Under, the solid particle of mud can suspend in water, avoid the occurrence of lamination.
It will be ground in mud investment grinder, broken wall, on the one hand, the partial size of particle in mud can be reduced；Another party
Face, the better mud of mobility is easier to realize under the high frequency grinding of grinder breaks the above-mentioned packet formed by mud granule and water
Wrap up in type structure, allow hydrone can separate out, be separated from mud granule.Using broken wall mode of the invention, shell-broken effect
More preferably, the dehydration rate of sludge is higher.
Mud after grinding is sent into reaction tank by S204, and chloracid salt is first added, and adds sulfur-containing compound, containing chlorine
Compound or polymeric oxides remove the stink in mud, finally using in weak base and mud.
The mud being sent into reaction tank is since by grinding broken wall, the chemical reagent put into reaction tank can pass through the package
Wound in type structure comes into full contact with internal microorganism, deodorization, sterilization.The wherein chemical reagent release sequence of reaction tank
Are as follows: 1, chloracid salt；2, sulfur-containing compound, chlorine-containing compound or polymeric oxides；3, weak base.Chloracid salt has deodorizing sterilizing concurrently
Effect, and reaction speed is especially fast, additional amount is few；Sulfur-containing compound and chlorine-containing compound are common deodorization reagent, and are polymerize
The deodorizing effect of chloride is obvious.According to the sludge of different sewage treatment plant, ingredient performance is different, carries out different type and use
The collocation of amount.It is eventually adding in a small amount of weak base and mud, while helping to be dehydrated.
Preferably, chloracid salt is one of sodium chlorate, sodium chlorite and sodium hypochlorite or combination.Sulfur-containing compound is
Sodium pyrosulfate, one of sodium peroxydisulfate, aluminum sulfate, ferric sulfate, polyaluminium sulfate, bodied ferric sulfate, polymeric aluminum sulfate iron or
Combination.Chlorine-containing compound is aluminium chloride, in iron chloride, sodium chloride, aluminium polychloride, poly-ferric chloride, polyaluminum ferric chloride
A kind of or combination.Polymeric oxides are one of polymer alumina, polymerization oxidation iron, polymerization oxidation ferro-aluminum or combination.More than
For the type and dosage that various chemical reagent are selected depending on sludge character, additional amount is generally the 0.001- of collecting pit sludge weight
0.5%.Since the above chemical agent is all that sludge is being added after physical wall breaking, situation that can be seldom in additional amount
Under play the role of good deodorizing sterilizing.
Treated, and sludge ammonia level can be reduced to original 20% hereinafter, hydrogen sulfide gas is substantially zeroed through detecting,
It is generated simultaneously without new pollutant, avoids causing secondary pollution to environment.
S205, flocculating setting agent, which is added, in mud assembles the mud granule in mud.
The flocculating setting agent that the present invention uses mainly has Flokal B and cationic flocculant, depending on different sewage processing
The Sludge Property of factory, ingredient is different and selects suitable flocculant type and dosage.
Mud after settlement is dehydrated by filter press so that the moisture content of sludge is down to 25-60%, after filters pressing by S206
Sludge discharge, recycle filters pressing after water use S201 step process again.
Sludge is sent into filter press by diaphragm pump, enables sludge with most in short-term under the mechanical pressure that filter press provides
Between, water in coated structure is discharged to greatest extent, the water of discharge flows into the raw processing pond of materialization of sewage discharge processing module,
And sludge then discharges.The performance indicator comparison for the sludge that sludge and former processing method of the detection discovery after dehydration obtain is such as
Under:
1, the moisture percentage in sewage sludge after processed by the invention is down to 25-60% from 80%；
2, at a temperature of 100 degree, take around 5 hours or more to dry raw sewage substantially, and treated sludge is 100
At a temperature of degree, it can dry completely within about 1.5 hours；
3, raw sewage is unable to naturally dry, sludge is under room temperature natural conditions after processing under room temperature natural conditions substantially
(27 DEG C, cloudy) can dry dry for about 5 hours completely；
4, there is apparent maggot in raw sewage, largely attract mosquito, and foul smelling taste, treated, and sludge does not have maggot,
Do not attract mosquito, and is destitute of smell substantially.
Dewatered sludge, can be used as fermentation system fertilizer, and conduct after flyash can also be added to make fuel in drying and dewatering
Make the material of environmental protection brick, haydite.The decline of moisture content also greatly reduces the volume of sludge, saves sludge freight and place
Reason landfill land used.
It should be noted that the specific processing method of step S200 and S201 of the invention is same or similar, but due to existing
The recycle-water that the sludge concentration tank of sewage water treatment method generates contains the impurity such as inorganic particle of more microorganism, floating, directly
Carry out the emission treatment of sewage, it will be apparent that increase cost of sewage disposal and time；And the present invention is to pass through physical grinding, chemistry
Sewage discharge processing module is convergeed to after deodorization again, greatly reduces processing pressure, and it is processed by the invention after sewage detection
It was found that can reach national sewage discharge level-one A standard (GB 18918-2002), disposed of in its entirety cost is conventional desliming sewage treatment
/ 5th or so of cost.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (8)
1. a kind of city sewage deep treatment method, which comprises the following steps:
Step 1: sewage is cleaned by grid, sand setting, primary deposition, and biological treatment and secondary precipitation are so that sewage and dirt
Mud initial gross separation；
Step 2: sewage will be handled using the method for physics, chemistry or biology through step 1 treated sewage, after disinfection and sterilization
Reach discharge index discharge；
Step 3: will carry out physical wall breaking using grinding through step 1 treated sludge, then be carried out by chemical reagent chemical
Broken wall deodorization, last filter-press dehydration, the sludge discharge after filters pressing, the water after recycling filters pressing are handled with step 2 again；
The step 3 specifically includes the following steps:
A. the mud being collected into is sent into collecting pit, then the biggish particle of partial size in mud is removed by vibrating screen；
B. the mud after vibrating shaker is sent into stirring stock tank, and is pumped in quantitative slurry investment grinder and is carried out by mud
Grinding, broken wall；
C. by after grinding mud be sent into reaction tank in, first be added chloracid salt, add sulfur-containing compound, chlorine-containing compound or
Polymeric oxides remove the stink in mud, finally using in weak base and mud；
D. flocculating setting agent is added in mud assembles the mud granule in mud；
E. mud after settlement is dehydrated by filter press so that the moisture content of sludge is down to 25-60%, the sludge after filters pressing
Discharge, the water after recycling filters pressing are handled with step 2 again.
2. city sewage deep treatment method as described in claim 1, which is characterized in that the chloracid salt in the step c is
One of sodium chlorate, sodium chlorite and sodium hypochlorite or combination.
3. city sewage deep treatment method as described in claim 1, which is characterized in that sulfur-bearing chemical combination described in the step c
Object is sodium pyrosulfate, sodium peroxydisulfate, aluminum sulfate, ferric sulfate, polyaluminium sulfate, bodied ferric sulfate, one in polymeric aluminum sulfate iron
Kind or combination.
4. city sewage deep treatment method as described in claim 1, which is characterized in that chloride containing described in the step c closes
Object is one of aluminium chloride, iron chloride, sodium chloride, aluminium polychloride, poly-ferric chloride, polyaluminum ferric chloride or combination.
5. city sewage deep treatment method as described in claim 1, which is characterized in that polymerization oxidation described in the step c
Object is one of polymer alumina, polymerization oxidation iron, polymerization oxidation ferro-aluminum or combination.
6. city sewage deep treatment method as described in claim 1, which is characterized in that the chloracid salt, sulfur-containing compound,
The additional amount of chlorine-containing compound or polymeric oxides is the 0.001-0.5% that collecting pit collects sludge weight.
7. city sewage deep treatment method as described in claim 1, which is characterized in that the vibrating screen mesh mesh number is 10-
60 mesh.
8. city sewage deep treatment method as described in claim 1, which is characterized in that the grinder includes ball mill, breaks
Broken machine and sand mill.
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| EP0764613A2 (en) * | 1995-09-22 | 1997-03-26 | Friedrich Teufert | Process and plant for purification of municipal and domestic waste water |
| CN1490262A (en) * | 2003-06-11 | 2004-04-21 | 贤 金 | Process for printing and dyeing waste water treating tower |
| CN103396950A (en) * | 2013-08-09 | 2013-11-20 | 烟台大学 | Biogas slurry ecological purification method based on microalgae cultivation |
| CN204434432U (en) * | 2015-01-28 | 2015-07-01 | 重庆秋之耘环保科技有限公司 | A kind of sludge conditioning broken wall reaction unit |
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| EP0764613A2 (en) * | 1995-09-22 | 1997-03-26 | Friedrich Teufert | Process and plant for purification of municipal and domestic waste water |
| CN1490262A (en) * | 2003-06-11 | 2004-04-21 | 贤 金 | Process for printing and dyeing waste water treating tower |
| CN103396950A (en) * | 2013-08-09 | 2013-11-20 | 烟台大学 | Biogas slurry ecological purification method based on microalgae cultivation |
| CN204434432U (en) * | 2015-01-28 | 2015-07-01 | 重庆秋之耘环保科技有限公司 | A kind of sludge conditioning broken wall reaction unit |
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