CN107585993A - A kind of processing method and processing device of sludge - Google Patents
A kind of processing method and processing device of sludge Download PDFInfo
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- CN107585993A CN107585993A CN201710993993.0A CN201710993993A CN107585993A CN 107585993 A CN107585993 A CN 107585993A CN 201710993993 A CN201710993993 A CN 201710993993A CN 107585993 A CN107585993 A CN 107585993A
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- 239000010802 sludge Substances 0.000 title claims abstract description 87
- 238000003672 processing method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 67
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000007787 solid Substances 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000047 product Substances 0.000 claims abstract description 16
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 11
- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 6
- 239000006228 supernatant Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229960002163 hydrogen peroxide Drugs 0.000 claims description 18
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000009303 advanced oxidation process reaction Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical group [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- -1 hydroxyl radical free radical Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- JWSMTBMIGYJJJM-UHFFFAOYSA-N magnesium;azane Chemical compound N.[Mg+2] JWSMTBMIGYJJJM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Abstract
The invention discloses a kind of processing method of sludge, carry out according to the following steps successively：(1) sludge is preheated, hydrogen peroxide is added into sludge, continue to heat, stirred；(2) by reaction product separation of solid and liquid, supernatant is taken；(3) supernatant adjusts pH after carrying out heavy metal adsorption and adds magnesium source；(4) by crystallized product separation of solid and liquid, ammonium magnesium phosphate is collected, clear liquid is passed through methane autoclave production biogas.This method rapidly and efficiently can be handled largely sludge caused by sewage plant, greatly reduce the cost of sludge treatment, while the product after processing does not pollute to environment.Meanwhile present invention provides a kind of sludge treatment equipment.
Description
Technical field
The present invention relates to sewage treatment area, particularly a kind of processing method and processing device of sludge.
Background technology
With the acceleration of urbanization process, water pollution is on the rise.Municipal sewage plant's treating capacity increase, because of existing dirt
The sludge treatment technique that water treatment plant takes is mostly activated sludge process.With the development of municipal sewage plant, produce a large amount of living
Property sludge is urgently handled.Municipal execution at present《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) one-level
Emission standard A, and largely belong to indissoluble, the organic matter of difficult degradation in water outlet COD, it is difficult that bioprocess technology can not continue degraded
The organic matter of degraded, the subsequent treatment of substantial amounts of sludge, which turns into one, to be needed to solve the problems, such as, the processing of sludge has become limit
The bottleneck that sewage treatment plant processed runs well.
The AOP handling process of sludge, the i.e. advanced oxidation processes of sludge have the characteristics that high efficiency, ease for operation, universality,
It is widely used in the processing of organic wastewater with difficult degradation thereby, high-level oxidation technology fundamentally changes point of hardly degraded organic substance
Minor structure, makes a portion sludge be direct oxidation into the small molecule inorganic matter such as water and carbon dioxide, and another part is mineralized
As the Phos of small molecule form, inorganic nitrogen and volatile aliphatic acid etc., for the ammonium magnesium phosphate knot in downstream process
Brilliant, anaerobic digestion produces the item processing procedures such as biogas, greatly improves dewatering performance of sludge, produces A level biosolids, and then realize
Sludge reduction.
Currently used for being mainly characterized by by reacting generation hydroxyl radical free radical (OH), free radical tool for advanced oxidation processes
There is extremely strong oxidisability, organic pollution can effectively be decomposed.The technology that existing literature provides is to solving advanced oxidation skill
Art realizes that large-scale Industry Promotion application has technological difficulties.
Such as widely used FENTON oxidations in the treatment of waste water at present.But FENTON technique chemical feeding quantities are big, double
Oxygen water unstable is degradable, and generation sludge quantity is big, adds financial cost, should which has limited the further expansion of FENTON techniques
With.
The electrochemical oxidation process technique has capacity usage ratio high, can also be carried out under low temperature, and equipment is relatively easy, is easy to certainly
Dynamic control, the features such as non-secondary pollution, but the technology energy consumption is higher, is not easy to form large-scale industrialized development.
Because in consideration of it, special propose this invention.
The content of the invention
It is an object of the invention to provide it is a kind of can be with the method and apparatus of efficient sewerage processing factory sludge.
To achieve these goals, the processing method of a kind of sludge provided by the invention, is carried out according to the following steps successively：
(1) sludge is preheated, hydrogen peroxide is added into sludge, continue to heat, stirred；
(2) by reaction product separation of solid and liquid, supernatant is taken；
(3) supernatant adjusts pH after carrying out heavy metal adsorption and adds magnesium source；
(4) by crystallized product separation of solid and liquid, ammonium magnesium phosphate is collected, clear liquid is passed through methane autoclave production biogas.
Preferably, the addition of hydrogen peroxide is 3~the 9 ‰ of sludge total solid quality in step (1).
Preferably, the hydrogen peroxide added in step (1) is 35% hydrogenperoxide steam generator.
Preferably, temperature is heated in step (1) as 90-120 DEG C.,
Preferably, step (3) regulation pH is realized by way of adding NaOH solution, and pH is adjusted to 9.4.
Preferably, the magnesium source of addition is MgCl in step (3)2Powder.
On the other hand, a kind of sludge treatment equipment, the sludge treatment equipment include pipeline reactor, the first separation of solid and liquid
Device, crystallizer, the second solid-liquid separator, methane-generating pit and mummifying pool；The pipeline reactor is connected with the first solid-liquid separator,
First solid-liquid separator is connected with crystallizer and mummifying pool, and the reaction product of the pipeline reactor is through the first separation of solid and liquid
After device separation, liquid portion is passed through in crystallizer, and solid portion is passed through in mummifying pool；The crystallizer and the second solid-liquid separator
It is connected, second solid-liquid separator is connected with methane-generating pit, and the product of the crystallizer is after the separation of the second solid-liquid separator, liquid
Body portion is passed through in the methane-generating pit, and the methane-generating pit is connected with mummifying pool.
Preferably, it is provided with oxidant adding set in the pipeline reactor.
Preferably, it is provided with heavy metals removal device in the crystallizer.
Preferably, the methane-generating pit is also connected with biogas electricity generation apparatus.
A kind of processing method and processing device of sludge provided by the invention, has the advantages that：
Rapidly and efficiently largely sludge caused by sewage plant can be handled, greatly reduce sludge treatment into
This, while the product after processing does not pollute to environment.
Brief description of the drawings
Fig. 1 is sludge treatment equipment schematic diagram provided by the invention.
In figure：
1. the natural pond of 2. 3. first solid-liquid separator of pipeline reactor of sludge-tank, 4. 5. second solid-liquid separator of crystallizer 6.
The clear liquid storage tank of 7. 9. mummifying pool of the 3rd solid-liquid separator of biogas electricity generation apparatus 8. of gas pond 10.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Embodiment one
Fig. 1 is refer to, present embodiments provides a kind of sludge treatment equipment.
The sludge treatment equipment includes pipeline reactor 2, the first solid-liquid separator 3, crystallizer 4, the second separation of solid and liquid
Device 5, methane-generating pit 6 and mummifying pool 9.
The charging aperture of pipeline reactor 2 is connected with sludge-tank 1, and agitating device and oxidant are provided with pipeline reactor 2
Adding set, outside are provided with heater.In the present embodiment, the oxidant added into pipeline reactor 2 is hydrogen peroxide
Solution, oxidant adding set are a hydrogen peroxide storage for carrying pump, and heater is microwave heating equipment.
Sludge in sludge-tank 1 is pumped in pipeline reactor 2, and hydrogen peroxide storage was added by pump into sludge
Hydrogen peroxide solution, and heat and stir fully oxidized by microwave.
The discharging opening of pipeline reactor 2 is connected with the first solid-liquid separator 3.
It should be noted that for the consideration for saving the energy, a heat exchange can also be set before the first solid-liquid separator
Device, by the heat of the reaction product of pipeline reactor 2 be used for sludge-tank 1 in sludge preheating, reduce subsequent heat process for
The consumption of the energy, make whole device more energy-conserving and environment-protective.
The reaction product of the device of pipe reaction 2 is carried out separation of solid and liquid by the first solid-liquid separator 3, and liquid portion is passed through crystallizer
In 4, solid portion is passed through in mummifying pool 9.
Heavy metals removal device is provided with the crystallizer 4, for removing the heavy metal thing being passed through in crystallizer 4 in liquid
Matter.
In the present embodiment, a clear liquid storage tank 10 is additionally provided between the solid-liquid separator 3 of crystallizer 4 and first, for depositing
Clear liquid caused by the first solid-liquid separator 3 is stored up, beneficial to crystallization operation afterwards.
In the present embodiment, pH adjusting meanss and magnesium source adding set are additionally provided with crystallizer 4.The pH adjusting meanss are
Sodium hydroxide solution adding set.
After the heavy metal in removing liquid, pH is adjusted by adding sodium hydroxide solution into liquid, and adds magnesium source,
Ammonium magnesium phosphate crystal is generated by crystallizer 4.
The product of crystallizer 4 is passed through the second solid-liquid separator 5, the solid isolated is ammonium magnesium phosphate crystal, liquid portion
It is passed through in methane-generating pit 6.
The liquid isolated in the methane-generating pit 6 containing the second solid-liquid separator 5, above-mentioned separation product is subjected to fermentation production
Raw biogas.
It should be noted that due to usually containing substantial amounts of silt in the sludge of domestic sewage treatment plant, therefore selection will
The solid portion of the product of oxidation reaction, which is not passed through in methane-generating pit, to ferment and is passed directly into mummifying pool and is handled.If but need
The content of silt is not high in the sludge of processing, then also may be selected the solid portion of oxidation reaction product being passed through in methane-generating pit to send out
Ferment.
The methane-generating pit 6 is also connected with biogas electricity generation apparatus 7, and the biogas electricity generation apparatus 7 utilizes biogas caused by methane-generating pit
Generate electricity and produce electric energy, it be able to be system power supply to produce electricity, and reduce further the electric energy needed for system.
Methane-generating pit 6 is connected with mummifying pool 9, and the 3rd solid-liquid for carrying heavy metal adsorption device is additionally provided with before mummifying pool 9
Separator 8.The product for being passed through mummifying pool 9 is carried out solid-liquid point by the 3rd solid-liquid separator 8 after heavy metal therein is adsorbed
From liquid portion is directly discharged or reclaimed, and solid portion is passed through mummifying pool 9 and does harmless treatment.
Embodiment two
A kind of processing method of sludge is present embodiments provided, is handled using the device in embodiment one.
Sludge is passed through in pipeline reactor, first sludge preheated by microwave heating equipment, in the present embodiment in advance
Hot temperature is 60 DEG C, is pumped into the hydrogen peroxide of sludge total solid 3 ‰ into sludge by hydrogen peroxide storage afterwards, at this
In embodiment, the hydrogen peroxide of addition is 35% aqueous hydrogen peroxide solution.
First sludge, which is preheated, can improve the reaction effect for adding hydrogen peroxide.
Heated by microwave heating equipment, heating-up temperature is carried out to 90 DEG C by the agitating device in pipeline reactor
Stirring, fully reaction, reaction time 3-8min.
Reaction product is subjected to separation of solid and liquid, liquid portion is passed through in crystallizer, and solid portion is passed through in mummifying pool.
Liquid portion adjusts pH to 9.4 after heavy metal adsorption, by adding sodium hydroxide solution, and adds magnesium thereto
Source generates ammonium magnesium phosphate and crystallized.
The magnesium source added in the present embodiment is magnesium chloride powder.The Mg that reaction is participated in liquid by adding magnesium source to make:P:N
Reach 1.2:1:1 or so.
By crystallized product separation of solid and liquid, wherein solid portion is ammonium magnesium phosphate crystal, the ammonium magnesium phosphate crystal that will be isolated
Recovery, liquid portion are passed through in methane-generating pit.
Material produces biogas through microbial fermentation in methane-generating pit, and caused biogas can pass to biogas electricity generation apparatus and produce electricity
Can, the electric energy is available for equipment to use.
Fermentation resultant product carries out separation of solid and liquid after carrying out absorption heavy metal, and liquid portion is directly discharged or reclaimed, solid
Part carries out drying and other treatment, obtains A level biosolids, and can carry out harmless treatment or further recycle.
Embodiment three
A kind of processing method of sludge is present embodiments provided, is handled using the device in embodiment one.
It is identical in basic processing method and embodiment two in the present embodiment, just repeat no more herein, its difference is：To
The amount that hydrogen peroxide is added in sludge is the 3 ‰ of sludge total solid, and heating-up temperature is to 110 DEG C.
Example IV
A kind of processing method of sludge is present embodiments provided, is handled using the device in embodiment one.
It is identical in basic processing method and embodiment two in the present embodiment, just repeat no more herein, its difference is：To
The amount that hydrogen peroxide is added in sludge is the 6 ‰ of sludge total solid, and heating-up temperature is to 120 DEG C.
Embodiment five
A kind of processing method of sludge is present embodiments provided, is handled using the device in embodiment one.
It is identical in basic processing method and embodiment two in the present embodiment, just repeat no more herein, its difference is：To
The amount that hydrogen peroxide is added in sludge is the 9 ‰ of sludge total solid, and heating-up temperature is to 110 DEG C.
Embodiment six
A kind of processing method of sludge is present embodiments provided, is handled using the device in embodiment one.
It is identical in basic processing method and embodiment two in the present embodiment, just repeat no more herein, its difference is：To
The amount that hydrogen peroxide is added in sludge is the 9 ‰ of sludge total solid, and heating-up temperature is to 120 DEG C.
Above-mentioned each group embodiment sludge when implementing adjusts pH to 9 with NaOH, or with sulphur acid for adjusting pH to 4, and respectively take one
Group data, to embody this method for alkaline sludge or the treatment effect of acid sludge.
Sludge parameters in embodiment two to six after pipeline reactor carries out oxidation reaction are as shown in table 1.
Sludge characteristics parameter list after 1 oxidized reaction treatment of table
Using method for sludge treatment provided by the invention, containing for the total suspended solid in sludge can be significantly reduced
Amount, at the same be greatly improved the content of orthophosphates in sludge, dissolubility kjeldahl nitrogen accounts for the ratio and SCOD/ of total grams of nitrogen
TCOD ratios.With the further processing to sludge after facilitating.Meanwhile which have to acid sludge and alkaline sludge compared with
Good treatment effect.
The liquid portion of product after sludge oxidation reaction adds magnesium source after adjustment of ph, makes phosphorus and nitrogen therein with phosphoric acid
The mode of ammonium magnesium crystallization removes, and such a mode can not only make the clearance of phosphorus and nitrogen reach more than 95%, while ammonium magnesium phosphate
Crystallization can be used as fertilizer, have certain economic benefit.
The liquid portion that the solid portion of product after sludge oxidation reaction and going denitrogenates phosphorus passes through to ferment and produces biogas
Mode removes organic substance therein, and the separation of solid and liquid after heavy metal adsorption of the residual substance after fermentation, liquid portion can be direct
Discharge or recycling, solid residue portion are then A level biosolids, can directly carry out landfill disposal or for making fragment of brick
Utilized etc. mode.
Remaining A levels biosolids residue is compared to the sludge of before processing after processing, and minimizing is more than 80%.Therefore
Sludge is handled using method provided by the invention, can be rapidly and efficiently largely to caused by sewage plant at sludge
Reason, the cost of sludge treatment is greatly reduced, while the product after processing does not pollute to environment.
Specific case used herein is elaborated to inventive concept, and the explanation of above example is only intended to
Help to understand core concept of the invention.It should be pointed out that for those skilled in the art, this is not being departed from
On the premise of inventive concept, any obvious modification, equivalent substitution or other improvement for being made, the present invention should be included in
Protection domain within.
Claims (10)
1. a kind of processing method of sludge, it is characterised in that carry out according to the following steps successively：
(1) sludge is preheated, hydrogen peroxide is added into sludge, continue to heat, stirred；
(2) by reaction product separation of solid and liquid, supernatant is taken；
(3) supernatant adjusts pH after carrying out heavy metal adsorption and adds magnesium source；
(4) by crystallized product separation of solid and liquid, ammonium magnesium phosphate is collected, clear liquid is passed through methane autoclave production biogas.
2. method for sludge treatment according to claim 1, it is characterised in that the addition of hydrogen peroxide is in step (1)
3~the 9 ‰ of sludge total solid quality.
3. method for sludge treatment according to claim 1, it is characterised in that the hydrogen peroxide of addition is in step (1)
35% hydrogenperoxide steam generator.
4. method for sludge treatment according to claim 1, it is characterised in that it is 90-120 that temperature is heated in step (1)
℃。
5. method for sludge treatment according to claim 1, it is characterised in that step (3) regulation pH is by adding NaOH
What the mode of solution was realized, and pH is adjusted to 9.4.
6. a kind of method for sludge treatment as claimed in claim 1, it is characterised in that the magnesium source of addition is MgCl in step (3)2
Powder.
7. a kind of sludge treatment equipment, it is characterised in that the sludge treatment equipment includes pipeline reactor, the first separation of solid and liquid
Device, crystallizer, the second solid-liquid separator, methane-generating pit and mummifying pool；The pipeline reactor is connected with the first solid-liquid separator,
First solid-liquid separator is connected with crystallizer and mummifying pool, and the reaction product of the pipeline reactor is through the first separation of solid and liquid
After device separation, liquid portion is passed through in crystallizer, and solid portion is passed through in mummifying pool；The crystallizer and the second solid-liquid separator
It is connected, second solid-liquid separator is connected with methane-generating pit, and the product of the crystallizer is after the separation of the second solid-liquid separator, liquid
Body portion is passed through in the methane-generating pit, and the methane-generating pit is connected with mummifying pool.
8. sludge treatment equipment according to claim 7, it is characterised in that add in the pipeline reactor provided with oxidant
Feeder apparatus.
9. sludge treatment equipment according to claim 7, it is characterised in that heavy metals removal is provided with the crystallizer and is filled
Put.
10. sludge treatment equipment according to claim 7, it is characterised in that the methane-generating pit is also connected with marsh gas power generation dress
Put.
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| CN109279751A (en) * | 2018-11-13 | 2019-01-29 | 天津城建大学 | A kind of preprocess method of excess sludge and application |
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