CN104478189B - Sludge deep oxidation processing technique - Google Patents
Sludge deep oxidation processing technique Download PDFInfo
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- CN104478189B CN104478189B CN201410712813.3A CN201410712813A CN104478189B CN 104478189 B CN104478189 B CN 104478189B CN 201410712813 A CN201410712813 A CN 201410712813A CN 104478189 B CN104478189 B CN 104478189B
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- scum silica
- foam
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 283
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000010802 sludge Substances 0.000 title claims abstract description 39
- 230000003647 oxidation Effects 0.000 title claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 316
- 239000006260 foam Substances 0.000 claims abstract description 164
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 158
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 239000002244 precipitate Substances 0.000 claims abstract description 17
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 239000006228 supernatant Substances 0.000 claims abstract description 13
- 230000018044 dehydration Effects 0.000 claims abstract description 10
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 10
- 238000013517 stratification Methods 0.000 claims abstract description 3
- 239000000376 reactant Substances 0.000 claims description 14
- 238000005188 flotation Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 20
- 210000002421 cell wall Anatomy 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 230000001413 cellular effect Effects 0.000 abstract description 3
- 230000003834 intracellular effect Effects 0.000 abstract description 3
- 244000005700 microbiome Species 0.000 abstract description 3
- 238000010668 complexation reaction Methods 0.000 abstract description 2
- 238000010790 dilution Methods 0.000 abstract 2
- 239000012895 dilution Substances 0.000 abstract 2
- 239000010865 sewage Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- -1 hydroxyl radical free radical Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010504 bond cleavage reaction Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000009466 transformation Effects 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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)
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
Present invention is disclosed a kind of sludge deep oxidation processing technique, comprise the following steps: mud is passed through in regulating reservoir by (1), and add the dilution of middle water；(2) mud after dilution carries out multi-stage oxidizing reaction, and after reaction, mud produces scum silica frost foam；(3) again scum silica frost foam is carried out multi-stage oxidizing reaction；(4) reacted mud and reacted scum silica frost foam are passed through in sedimentation tank, stratification, form supernatant and precipitate；(5) by precipitate filter-press dehydration, form mud cake, and supernatant is returned water factory.Sludge deep oxidation processing technique provided by the present invention can make cell wall breaking, make in mud microorganism and antibacterial by effective breaking cellular wall, thus discharge intracellular aquiform stool in removing, after mud makes mud cake, its moisture content can be down to about 50%, greatly reduce the weight of mud cake, save mud cake outward transport cost；Further, this technique can make the complexation group in mud be opened, and biodegradability significantly improves, the clean environmental protection of processing procedure.
Description
Technical field
The present invention relates to sewage treatment area, a kind of method particularly relating to mud oxidation processes.
Background technology
In recent years, owing to Environmental attention degree is more and more higher, pollutant emission requires also increasingly stringent.The numeral provided according to China national Environmental Protection Administration, the at present annual about sewage effluent of China
40100000000 m3, there are more than 400 seats, daily handling ability 25,340,000 m in the municipal sewage plant of built operating3.Account for 0.3%～0.5% (in terms of the moisture content 97%) calculating processing the water yield by sludge yield, the yield of Chinese city sewage plant sludge is at 7.602 ten thousand m3/d and 12.67 ten thousand m3Between/d (in terms of moisture content 97%).Therefore, China, while sewage disposal cause constantly makes progress, will face huge specific resistance to filtration pressure, mud be carried out decrement treatment research, it appears highly significant.
Sludge water content includes Interstitial Water, capillary water, absorption water and internal water, and Interstitial Water is present in the water in mud granule gap, accounts for about the 70% of sludge water content；Capillary water is present in the capillary tube between mud granule, accounts for about the 20% of sludge water content.It is also possible to use thing；Absorption water invests the attached water on mud granule surface, and internal water is present in the internal water of mud granule internal (including the water in biological cell), and absorption water and internal water account in mud about the 10% of moisture.In prior art, the main employing machinery of Sewage Plant or the method thickened sludge of gravity, the outward transport after concentrating the most again.Mud directly carrying out machinery or gravity methods concentrates, the moisture content of mud can only be down to 80%, the dehydration to mud is the most abundant, causes mud weight big, and transports outward cost and be directly proportional to mud weight, thus the cost transporting outward mud is the most of a relatively high.Obviously, in prior art to the method Shortcomings of Treatment of Sludge in place of, it is necessary to it is further improved.
Summary of the invention
The invention aims to overcome the shortcoming that the treatment effect of existing method for sludge treatment is undesirable, it is provided that a kind of dehydrating effect good sludge deep oxidation processing technique.
The technical solution of the present invention is: sludge deep oxidation processing technique, and whole processing procedure is dynamically continuous, comprises the following steps:
(1) mud is entered: be passed through in regulating reservoir by mud, and the adjustment concentration that adds water；
(2) oxidation reaction: at least provided with two-stage oxidation reaction pond group, in every grade of oxidation reaction pond group, at least there is an oxidation reaction pond, when having multiple stage oxidation reaction pond in every grade of oxidation reaction pond group, it is between the oxidation reaction pond in the oxidation reaction pond group of same one-level by pipeline in parallel, is between the oxidation reaction pond in oxidation reaction pond group the most at the same level and passes through placed in series；When only there is an oxidation reaction pond in every grade of oxidation reaction pond group, between each oxidation reaction pond, pass through placed in series；Mud after concentration being adjusted afterwards first passes through in stair oxidation reaction tank group, then by next stage oxidation reaction pond group, until by afterbody oxidation reaction pond group, the mud upper strata after peroxidization produces scum silica frost and foam；
(3) scum silica frost foam reoxidizes: at least provided with two-stage scum silica frost foam oxidation reaction pond group, at least there is in every grade of scum silica frost foam oxidation reaction pond group a table flotation slag foam oxidation reaction pond, when having multiple stage scum silica frost foam oxidation reaction pond in every grade of scum silica frost foam oxidation reaction pond group, it is between the scum silica frost foam oxidation reaction pond in the scum silica frost foam oxidation reaction pond group of same one-level by pipeline in parallel, is between the scum silica frost foam oxidation reaction pond in scum silica frost foam oxidation reaction pond group the most at the same level and passes through placed in series；When only having a table flotation slag foam oxidation reaction pond in every grade of scum silica frost foam oxidation reaction pond group, between each scum silica frost foam oxidation reaction pond, pass through placed in series；Mud after concentration being adjusted afterwards first passes through in the group of one-level scum silica frost foam oxidation reaction pond, then by next stage scum silica frost foam oxidation reaction pond group, until by afterbody scum silica frost foam oxidation reaction pond group；
(4) precipitation: the mud after oxidation reaction and reacted scum silica frost foam are passed through in sedimentation tank, stratification, forms supernatant and precipitate；
(5) precipitate dehydration: by precipitate filter-press dehydration, forms mud cake, and supernatant is returned water factory.
Further, above-mentioned sludge deep oxidation processing technique, wherein: between the oxidation reaction pond group of described different stage, be provided with regulating reservoir, between the scum silica frost foam oxidation reaction pond group of different stage, it is provided with scum silica frost foam regulating reservoir.
Further, above-mentioned sludge deep oxidation processing technique, wherein: in described oxidation reaction pond and scum silica frost foam reactant pond, being passed through electric current density is 1-20mA/cm2Micro-electric current.
Further, above-mentioned sludge deep oxidation processing technique, wherein: in described oxidation reaction pond and scum silica frost foam reactant pond, being passed through electric current density is 3mA/cm2Micro-electric current.
Further, above-mentioned sludge deep oxidation processing technique, wherein: the quantity in described stair oxidation reaction tank group and the oxidation reaction pond in secondary oxidation reaction tank group, than for 2:1, is connected with the oxidation reaction pond in a secondary oxidation reaction tank group after parallel connection between every two oxidation reaction ponds in stair oxidation reaction tank group；The quantity in described one-level scum silica frost foam oxidation reaction pond group and the scum silica frost foam reactant pond in two grades of scum silica frost foam oxidation reaction pond groups, than for 2:1, is connected with the scum silica frost foam oxidation reaction pond in one two grades scum silica frost foam oxidation reaction pond groups after parallel connection between every two table flotation slag foam oxidation reaction ponds in the group of one-level scum silica frost foam oxidation reaction pond.
Further, above-mentioned sludge deep oxidation processing technique, wherein: described stair oxidation reaction tank group is provided with ten oxidation reaction ponds, secondary oxidation reaction tank group is provided with five oxidation reaction ponds；Described one-level scum silica frost foam oxidation reaction pond group is provided with four table flotation slag foam reactant ponds, and it is 3mA/cm that two grades of scum silica frost foam oxidation reaction pond groups be provided with two table flotation slag foam reactant ponds, described oxidation reaction pond and scum silica frost foam oxidation reaction pond to be passed through electric current density2Micro-electric current.
Further, above-mentioned sludge deep oxidation processing technique, wherein: described oxidation reaction pond group the most at the same level is arranged at different height, and the oxidation reaction pond group of next stage is arranged at the underface of upper level oxidation reaction pond group；Described scum silica frost foam oxidation reaction pond group the most at the same level is arranged at different height, and the scum silica frost foam oxidation reaction pond group of next stage is arranged at the underface of upper level scum silica frost foam oxidation reaction pond group.
Yet further, above-mentioned sludge deep oxidation processing technique, wherein: described oxidation reaction pond and scum silica frost foam oxidation reaction pond include container and at least one pair of electrode, before and after described container, both sides are respectively provided with inlet and outlet, the anode of described electrode connects positive source, and the negative electrode of electrode connects power cathode；Described oxidation reaction pond and scum silica frost foam oxidation reaction pond are additionally provided with a pair baffle plate and a pair internal partition, a pair baffle plate is respectively arranged at both sides before and after container inside, a pair internal partition is arranged at the left and right sides within container, a scum silica frost froth overflow channel is formed between internal partition and the sidewall of container, scum silica frost foam drainage mouth it is provided with below scum silica frost froth overflow channel, scum silica frost foam drainage mouth is connected with pump, scum silica frost and foam is passed through in sedimentation tank by pump；Described baffle plate and internal partition composition oxidation reaction zone, described electrode is inserted in oxidation reaction zone.
Yet further, above-mentioned sludge deep oxidation processing technique, wherein: described oxidation reaction pond and scum silica frost foam oxidation reaction pond are provided with ultrasonic instrument, it is used for abolishing larger particles cleaning container.
Substantive distinguishing features and significant technological progress that the present invention highlights are mainly reflected in: (1) sludge deep provided by the present invention oxidation processing technique can make cell wall breaking, make in mud microorganism and antibacterial by effective breaking cellular wall, discharge intracellular water and then be removed, after mud makes mud cake, its moisture content can be down to about 50%, greatly reduce the weight of mud cake, save mud cake outward transport cost；(2) in mud, complexation group is opened, the effective scission of link of larger molecular organics and decomposition, and biodegradability significantly improves, and discharges the nontoxic gas such as carbon dioxide, nitrogen, clean environmental protection；(3) sludge deep oxidation processing technique involved in the present invention, needed for it, cost is relatively low, economical and practical.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of sludge deep oxidation processing technique of the present invention；
Fig. 2 is sludge deep oxidation processing technique one of which embodiment schematic diagram of the present invention；
Fig. 3 is the schematic diagram of sludge deep oxidation processing technique reaction of high order pond of the present invention group setting method；
Fig. 4 is reaction tank side view；
Fig. 5 is reaction tank front cross-sectional view.
In figure, the implication of each reference is: 1 regulating reservoir, 2 pumps, 3 first order reaction pond groups, 4 secondary response pond groups, 5 scum silica frost foam regulating reservoirs, 6 one-level scum silica frost foam reactant pond groups, 7 two grades of scum silica frost foam reactant pond groups, 8 sedimentation tanks, 9 pressure filter, the 10 existing processing systems of sewage treatment plant, 11 imports, 12 containers, 13 baffle plates, 14 electrodes, 15 outlets, 16 oxidation reaction zones, 17 internal partitions, 18 scum silica frost froth overflow channels, 19 scum silica frost foam drainage mouths.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in further detail, so that technical solution of the present invention is more readily understood and grasps.
As shown in Figure 1, sludge deep oxidation processing technique of the present invention comprises the following steps: (1) enters mud: will be passed through regulating reservoir 1 without the mud of any process in sewage treatment plant, and in regulating reservoir, it is passed through water by pump 2, by on-line control system, moisture percentage in sewage sludge is adjusted to 96.0% ~ 99.6%；(2) oxidation reaction: the mud after concentration being adjusted is by oxidation reaction ponds at different levels group, oxidation reaction pond component is first order reaction pond group 3 and secondary response pond group 4, every order reaction pond group is consisted of pipeline parallel connection multiple stage oxidation reaction pond, placed in series is passed through between oxidation reaction pond in stair oxidation reaction tank group 3 and secondary oxidation reaction tank group 4, further, between stair oxidation reaction tank 3 groups and secondary oxidation reaction tank 4 groups, it is provided with regulating reservoir 1；Control mud flow velocity, pass sequentially through stair oxidation reaction tank group 3 and secondary oxidation reaction tank group 4 carries out oxidation reaction；null(3) scum silica frost foam reoxidizes: the mud upper strata after peroxidization can produce scum silica frost and foam，The scum silica frost produced in every grade of oxidation reaction pond and foam are collected to scum silica frost foam regulating reservoir 5，And in scum silica frost foam regulating reservoir 5, it is passed through water by pump 2，The moisture content of scum silica frost foam is adjusted to 96% ~ 99.6%，And by concentration adjust after scum silica frost and foam by scum silica frost foam oxidation reaction ponds at different levels group，Scum silica frost foam oxidation reaction pond component is one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7，Every grade of oxidation reaction pond group is consisted of pipeline parallel connection multiple stage oxidation reaction pond，Placed in series is passed through in oxidation reaction pond between in one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7，And it is provided with scum silica frost foam regulating reservoir 5 between the scum silica frost foam oxidation reaction pond group 7 of 6 groups and two grades of one-level scum silica frost foam oxidation reaction pond；Control scum silica frost foam flow velocity, pass sequentially through one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7 carry out oxidation reaction；(4) precipitation: the mud after stair oxidation reaction tank group 3 and secondary oxidation reaction tank group 4 process and the scum silica frost foam after one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7 process are passed through in sedimentation tank 5, and stand in sedimentation tank 5, precipitate and supernatant layering；(5) precipitate dehydration: by pump 2, precipitate being passed through pressure filter 9, pressure filter 6 carries out filter-press dehydration to precipitate, makes mud cake, supernatant finally returns water factory and supernatant is passed through the existing processing system of sewage treatment plant 10.It should be noted that, in the progression of oxidation reaction pond group, the quantity of every grade of oxidation reaction pond group internal oxidition reaction tank, the progression of scum silica frost foam oxidation reaction pond group and the scum silica frost foam oxidation reaction pond group that arrange, the quantity of scum silica frost foam reactant pond group all can be adjusted according to practical situation, and such scheme is only preferably.Such as, oxidation reaction pond group and scum silica frost foam oxidation reaction pond group are respectively provided with two-stage, and the quantity of stair oxidation reaction tank and secondary oxidation reaction tank is than for 3:1, and the quantity in one-level scum silica frost foam oxidation reaction pond and two grades of scum silica frost foam reactant ponds is than for 3:1.
Oxidation reaction pond and scum silica frost foam oxidation reaction pool structure are as shown in Figures 4 and 5, oxidation reaction pond includes container 12 and Duo Gen electrode 14, before and after container 12, both sides are respectively arranged with import 11 and outlet 15, a pair baffle plate 13 and a pair internal partition 17 it is provided with in container 12, a pair baffle plate 13 is respectively arranged at both sides before and after container 12 inside, a pair internal partition 17 is respectively arranged at the left and right sides within container 12, a scum silica frost froth overflow channel 18 is formed between the sidewall of internal partition 17 and container 12, scum silica frost foam drainage mouth 19 it is provided with below scum silica frost froth overflow channel 18, scum silica frost foam drainage mouth 19 is connected with pump 2, by pump 2, scum silica frost and foam are passed through in sedimentation tank 8.Baffle plate 13 and internal partition 17 surround oxidation reaction zone 16, electrode 14 is inserted in oxidation reaction zone 16, wherein electrode anode connects positive source, electrode cathode connects power cathode, the arrangement mode of electrode 14 is one anode electrode of folder between two cathode electrodes, and it is 1-20mA/cm that electrode anode and electrode cathode are all passed through electric current density2Micro-electric current, the electric current density being passed through is the biggest, and Treatment of Sludge effect is the best, and however as the increase of electric current density, electrode life reduces, and process costs increases the most accordingly.Oxidation reaction is additionally provided with ultrasonic unit in pond, is used for abolishing larger particles cleaning container.
Embodiment
1
The oxidation reaction pond using volume to be 750 liters, as in figure 2 it is shown, sewage treatment plant is passed through regulating reservoir 1 without the mud of any process, regulating reservoir 1 is passed through water so that moisture percentage in sewage sludge is adjusted to 99.0% ~ 99.6%；Arranging 21 oxidation reaction ponds, wherein oxidation reaction pond group and scum silica frost foam oxidation reaction pond group are respectively provided with two-stage, be provided with ten oxidation reaction ponds, be provided with five oxidation reaction ponds in secondary oxidation reaction tank group 4 in stair oxidation reaction tank group 3；It is provided with four table flotation slag foam oxidation reaction ponds in one-level scum silica frost foam oxidation reaction pond group 6, in two grades of scum silica frost foam oxidation reaction pond groups 7, is provided with two table flotation slag foam oxidation reaction ponds.The quantity in stair oxidation reaction tank group 3 and the oxidation reaction pond in secondary oxidation reaction tank 4 groups, than for 2:1, is connected with the oxidation reaction pond in a secondary oxidation reaction tank group 4 after every two the oxidation reaction pond parallel connections in stair oxidation reaction tank group 3；The quantity in the scum silica frost foam oxidation reaction pond in one-level scum silica frost foam oxidation reaction pond group 6 and 7 groups of two grades of scum silica frost foam oxidation reaction ponds is 2:1 than also, connects with the scum silica frost foam oxidation reaction pond in one two grades scum silica frost foam oxidation reaction pond groups 7 after the every two table flotation slag foam oxidation reaction pond parallel connections in one-level scum silica frost foam oxidation reaction pond group 6.Due to the oxidation reaction pond in a secondary oxidation reaction tank group 4 of only connecting after the oxidation reaction pond parallel connection in every two stair oxidation reaction tank groups 3, it is no longer necessary to the mud after stair oxidation reaction tank group 3 is processed shunt, thus it is no longer necessary to arrange regulating reservoir 1, correspondingly, also it is no longer necessary to arrange scum silica frost foam regulating reservoir 5 between one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7.Each oxidation reaction pond is 3mA/cm with the electric current density of the micro-electric current connected in scum silica frost foam oxidation reaction pond2null，Afterwards mud is passed sequentially through stair oxidation reaction tank group 3 and secondary oxidation reaction tank group 4 according to the flow velocity of 1.5 cubic meters/hour，After mud passes sequentially through oxidation reaction pond，Its upper strata can produce a large amount of scum silica frost and foam，Collect scum silica frost and foam is passed through in scum silica frost foam regulating reservoir 5，And it is passed through water in scum silica frost foam regulating reservoir 5，Scum silica frost foam after regulation is passed through one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7 successively，Will be through stair oxidation reaction tank group 3、Mud after secondary oxidation reaction tank group 4 and through one-level scum silica frost foam oxidation reaction pond group 6、The scum silica frost foam of two grades of scum silica frost foam oxidation reaction pond groups 7 converges in sedimentation tank 8，And in sedimentation tank, stand the little layered of 4-12，Form supernatant and precipitate，Precipitate is passed through in pressure filter 6 by pump 2，Pressure filter 6 carries out filter press dehydration and makes mud cake precipitate，And supernatant is returned water factory，And it is passed through the existing processing system of sewage treatment plant 10.After reaction, mixed liquor sludge concentration (MLSS) clearance reaches 60.6%, and the clearance of COD (COD) reaches 68.0%, and the pH value of former mud is meta-alkalescence (> 7.4), become unsaturation carbon acid solution after reaction, pH value slightly acidic (6.0-6.9).When oxidation reaction pond group is set, the oxidation reaction pond group of next stage can be arranged at the underface of upper level oxidation reaction pond group, the mud after higher level's oxidation reaction pond group processes is made to flow in the group of subordinate's oxidation reaction pond under the effect of self gravitation voluntarily, as shown in Figure 3, secondary oxidation reaction tank group 4 is arranged at the underface of stair oxidation reaction tank group 3, correspondingly, two grades of scum silica frost foam oxidation reaction pond groups 7 are also disposed on the underface of one-level scum silica frost foam oxidation reaction pond group 6.
Embodiment
2
Apparatus is 3mA/cm with the electric current density of the micro-electric current connected in embodiment 1, each oxidation reaction pond and scum silica frost foam oxidation reaction pond2.nullBy 99.0% ~ 99.6% mud after regulation，Stair oxidation reaction tank group 3 and secondary oxidation reaction tank group 4 is passed sequentially through according to the flow velocity of 1.0 cubic meters/hour，After mud passes sequentially through oxidation reaction pond，Its upper strata can produce a large amount of scum silica frost and foam，Collect scum silica frost and foam is passed through in scum silica frost foam regulating reservoir 5，And it is passed through water in scum silica frost foam regulating reservoir 5，Scum silica frost foam after regulation is passed through one-level scum silica frost foam oxidation reaction pond group 6 and two grades of scum silica frost foam oxidation reaction pond groups 7 successively，Will be through stair oxidation reaction tank group 3、Mud after secondary oxidation reaction tank group 4 and through one-level scum silica frost foam oxidation reaction pond group 6、The scum silica frost foam of two grades of scum silica frost foam oxidation reaction pond groups 7 converges in sedimentation tank 8，And in sedimentation tank, stand the little layered of 4-12，Form supernatant and precipitate，Precipitate is passed through in pressure filter 6 by pump 8，Pressure filter 6 carries out filter press dehydration and makes mud cake precipitate，And supernatant is returned water factory，And it is passed through the existing processing system of sewage treatment plant 10.After reaction, mixed liquor sludge concentration (MLSS) clearance reaches 30.9%, and the clearance of COD (COD) reaches 35.6%, and the pH value of former mud is meta-alkalescence (> 7.4), become unsaturation carbon acid solution after reaction, pH value slightly acidic (6.0-6.9).
The multi-stage oxidizing technology that the present invention uses is that modified metal battery lead plate is under the effect of external electric field, utilize the hydrone in energetic particle beam bombardment mud, hydrone is made to ionize, generate ion, excite molecule, secondary electron, these radiation products can interact before spreading to surrounding medium and produce the material that respond is extremely strong, such as OH free radical, O, O2 -With H, H2O2, particularly obtain the most special hydroxyl radical free radical exciting situation.This hydroxyl radical free radical has strong oxidizing property, and it can produce following positive effect:
(1) cell wall breaking: can promptly penetrate in mud in organic cell wall, makes in mud microorganism and antibacterial by effective breaking cellular wall, thus discharges intracellular water；
(2) direct oxidation: be used for attacking unsaturated compounds (including olefines, ethers, unsaturated aliphatic hydrocarbon, arene etc.) and ammonia nitrogen NH3-N so that it is be changed as small organic molecule, thus effectively remove poisonous and hardly degraded organic substance；
(3) other effect: can effectively organics removal, antibacterial, colourity, odor etc., assistance heavy metal adsorption and sedimentation；
(4) environmental friendliness: product is mainly the nontoxic gas such as carbon dioxide, nitrogen, it does not has any impact to surrounding, and comparing other Sludge Reduction Technologies has obvious superiority.
After reaction, after mud is made mud cake, its moisture content is down to about 50%, and the pH value of former mud is meta-alkalescence (> 7.4), become unsaturation carbon acid solution after reaction, pH value is less than 6.9.Carry out closing sampling to the gas in the bubble in reaction after-bay, and as follows by mass chromatography Instrumental Analysis gas componant: (1) nitrogen and oxygen account for 91.2%；(2) CO2Account for 8.6%；(3) there are the toluene (0.14%) of trace, CH3Cl3、HBrCl2And mononuclear aromatics etc.；(4) fuel gas such as hydrogen and methane is few.CO in air2Normal contents be 0.03%, and now CO2Content reach 8.6% explanation have large amount of organic through peroxidization pond oxidation generate CO2.Former mud BOD and COD ratio are typically at 0.2-0.3；After reaction, the Biochemical oxygen demand (BOD) of solvent portions and the ratio of COD (COD) are about 0.42；This also can illustrate cell wall breaking, biomass generation scission of link, and after reaction, mud biochemical rate can obtain obvious raising.The most micro-electric current advanced oxidation can effectively cut down COD, including macromole hardly degraded organic substance.On the other hand, the product after chain rupture, based on small organic molecule, is more easy to be separated from former mud by absorption and air supporting effect, it is simple to subsequent biological treatment.
Being more than the representative instance of the present invention, in addition, the present invention can also have the technical scheme that other multiple detailed description of the invention, all employing equivalents or equivalent transformation are formed, within all falling within the scope of protection of present invention.
Claims (7)
1. sludge deep oxidation processing technique, whole processing procedure is the most continuous, it is characterised in that comprise the following steps:
(1) mud is entered: be passed through in regulating reservoir by mud, and the adjustment concentration that adds water；
(2) oxidation reaction: at least provided with two-stage oxidation reaction pond group, in every grade of oxidation reaction pond group, at least there is an oxidation reaction pond, when having multiple stage oxidation reaction pond in every grade of oxidation reaction pond group, it is between the oxidation reaction pond in the oxidation reaction pond group of same one-level by pipeline in parallel, is between the oxidation reaction pond in oxidation reaction pond group the most at the same level and passes through placed in series；When only there is an oxidation reaction pond in every grade of oxidation reaction pond group, between each oxidation reaction pond, pass through placed in series；Mud after concentration being adjusted afterwards first passes through in stair oxidation reaction tank group, then by next stage oxidation reaction pond group, until by afterbody oxidation reaction pond group, the mud upper strata after peroxidization produces scum silica frost and foam；
(3) scum silica frost foam reoxidizes: at least provided with two-stage scum silica frost foam oxidation reaction pond group, at least there is in every grade of scum silica frost foam oxidation reaction pond group a table flotation slag foam oxidation reaction pond, when having multiple stage scum silica frost foam oxidation reaction pond in every grade of scum silica frost foam oxidation reaction pond group, it is between the scum silica frost foam oxidation reaction pond in the scum silica frost foam oxidation reaction pond group of same one-level by pipeline in parallel, is between the scum silica frost foam oxidation reaction pond in scum silica frost foam oxidation reaction pond group the most at the same level and passes through placed in series；When only having a table flotation slag foam oxidation reaction pond in every grade of scum silica frost foam oxidation reaction pond group, between each scum silica frost foam oxidation reaction pond, pass through placed in series；Mud after concentration being adjusted afterwards first passes through in the group of one-level scum silica frost foam oxidation reaction pond, then by next stage scum silica frost foam oxidation reaction pond group, until by afterbody scum silica frost foam oxidation reaction pond group；
(4) precipitation: the mud after peroxidization and scum silica frost foam are passed through in sedimentation tank, stratification, forms supernatant and precipitate；
(5) precipitate dehydration: by precipitate filter-press dehydration, forms mud cake, and supernatant is returned water factory；
In described oxidation reaction pond and scum silica frost foam reactant pond, being passed through electric current density is 1-20mA/cm2Micro-electric current, described oxidation reaction pond group the most at the same level is arranged at different height, and the oxidation reaction pond group of next stage is arranged at the underface of upper level oxidation reaction pond group；Described scum silica frost foam oxidation reaction pond group the most at the same level is arranged at different height, and the scum silica frost foam oxidation reaction pond group of next stage is arranged at the underface of upper level scum silica frost foam oxidation reaction pond group.
Sludge deep oxidation processing technique the most according to claim 1, it is characterised in that: it is provided with regulating reservoir between the oxidation reaction pond group of described different stage, between the scum silica frost foam oxidation reaction pond group of different stage, is provided with scum silica frost foam regulating reservoir.
Sludge deep oxidation processing technique the most according to claim 1, it is characterised in that: in described oxidation reaction pond and scum silica frost foam reactant pond, being passed through electric current density is 3mA/cm2Micro-electric current.
Sludge deep oxidation processing technique the most according to claim 1, it is characterized in that: the quantity in described stair oxidation reaction tank group and the oxidation reaction pond in secondary oxidation reaction tank group, than for 2:1, is connected with the oxidation reaction pond in a secondary oxidation reaction tank group after parallel connection between every two oxidation reaction ponds in stair oxidation reaction tank group；The quantity in described one-level scum silica frost foam oxidation reaction pond group and the scum silica frost foam reactant pond in two grades of scum silica frost foam oxidation reaction pond groups, than for 2:1, is connected with the scum silica frost foam oxidation reaction pond in one two grades scum silica frost foam oxidation reaction pond groups after parallel connection between every two table flotation slag foam oxidation reaction ponds in the group of one-level scum silica frost foam oxidation reaction pond.
Sludge deep oxidation processing technique the most according to claim 4, it is characterised in that: described stair oxidation reaction tank group is provided with ten oxidation reaction ponds, and secondary oxidation reaction tank group is provided with five oxidation reaction ponds；Described one-level scum silica frost foam oxidation reaction pond group is provided with four table flotation slag foam reactant ponds, and it is 3mA/cm that two grades of scum silica frost foam oxidation reaction pond groups be provided with two table flotation slag foam reactant ponds, described oxidation reaction pond and scum silica frost foam oxidation reaction pond to be passed through electric current density2Micro-electric current.
Sludge deep oxidation processing technique the most according to claim 1, it is characterized in that: described oxidation reaction pond and scum silica frost foam oxidation reaction pond include container and at least one pair of electrode, before and after described container, both sides are respectively provided with inlet and outlet, the anode of described electrode connects positive source, and the negative electrode of electrode connects power cathode；Described oxidation reaction pond and scum silica frost foam oxidation reaction pond are additionally provided with a pair baffle plate and a pair internal partition, a pair baffle plate is respectively arranged at both sides before and after container inside, a pair internal partition is arranged at the left and right sides within container, a scum silica frost froth overflow channel is formed between internal partition and the sidewall of container, scum silica frost foam drainage mouth it is provided with below scum silica frost froth overflow channel, scum silica frost foam drainage mouth is connected with pump, scum silica frost and foam is passed through in sedimentation tank by pump；Described baffle plate and internal partition composition oxidation reaction zone, described electrode is inserted in oxidation reaction zone.
Sludge deep oxidation processing technique the most according to claim 6, it is characterised in that: described oxidation reaction pond and scum silica frost foam oxidation reaction pond are provided with ultrasonic instrument, are used for abolishing larger particles cleaning container.
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