CN102874974A - Advanced treatment and comprehensive utilization process for sewage and sludge in sewage treatment plant - Google Patents
Advanced treatment and comprehensive utilization process for sewage and sludge in sewage treatment plant Download PDFInfo
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- CN102874974A CN102874974A CN2011101985204A CN201110198520A CN102874974A CN 102874974 A CN102874974 A CN 102874974A CN 2011101985204 A CN2011101985204 A CN 2011101985204A CN 201110198520 A CN201110198520 A CN 201110198520A CN 102874974 A CN102874974 A CN 102874974A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention provides an advanced treatment and comprehensive utilization process for sewage and sludge in a sewage treatment plant. The advanced treatment and comprehensive utilization process comprises the following steps of: sequentially performing anaerobic hydrolysis reaction, aerobiotic reaction and denitrification reaction on sewage to produce activated sludge; further treating a water body subjected to denitrification reaction to become reclaimed water which accords with the reclaimed water quality standard required in China; and continuously performing anaerobic hydrolysis reaction after the reclaimed water is used and returned, and producing one or more of degradable plastic, microprotein, fertilizers, soil conditioners and building materials by using the activated sludge produced during anaerobic hydrolysis reaction. By the advanced treatment and comprehensive utilization process, the sewage and the sludge in the sewage treatment plant are changed into recycling resources, and a sustainable zero-emission ecological industrial chain of the sewage treatment plant is realized.
Description
Technical field
The present invention relates to field of environment protection, sewage sludge process field, particularly, relate to advanced treatment and the comprehensive utilization process of a kind of sewage work sewage sludge.
Background technology
" 12 " planning will require town at county level, especially emphasis town to set up sewage work.The town at county level of nationwide has more than 30,000 at present, and the emphasis town has more than 10,000.Sewage quantity can increase along with the increase of All population capacities.According to general forecast, Chinese population will reach the peak between the year two thousand twenty to 2025 year, and sewage quantity also will reach the climax about the year two thousand twenty, and this amount is very huge.Be constructed and put into operation the at present sewage work of operation of the whole nation amounts to more than 100, sewage work that can oepration at full load only approximately 1/3, and the unprocessed phenomenon of arranging steathily of sewage appears in many sewage works, does not bring into play the due benefit of construction sewage work; Especially China produces 7.5 ten thousand tons in the wet mud of water content 80% every day, and output is huge and processing costs is high, and the processing of mud is disposed and generally is not resolved, and the secondary pollution problem that therefore causes progressively manifests.Mud occurs without stabilization treatment, adopt land purchase air storage or agricultural.Cause the contaminate environment such as pathogenic bacteria, stench, heavy metal serious.
Although some urban wastewater treatment firms are arranged, water outlet after a part is processed adopts flocculence or embrane method advanced treatment to middle water reuse; But because investment is high, should not promote.
Traditional ﹠ Mud method, adopt mechanical dehydration after, be about 80% mud with water ratio, landfill or compost; Or anaerobic digestion is become reconciled and is supported that to do farming after the digestion fertile.And the heavy metal in the mud is can only part stabilized, long-term agricultural accumulation or the secondary pollution problem that still has heavy metal; Again since after processing the Microbial resources in water outlet and the active sludge not yet be fully used, sewage work can not reach the zero release of sewage and mud, is in and afford to build the predicament of also can not supporting even many urban wastewater treatment firms occur again.
Summary of the invention
For the problem that exists in the correlation technique, the object of the present invention is to provide advanced treatment and the comprehensive utilization process of a kind of sewage work sewage sludge, make sewage and mud become can recycle resource, form the Ecological Industry Chain of sewage work's zero release.
For achieving the above object, the invention provides a kind of advanced treatment and comprehensive utilization process of sewage sludge, comprise the steps: step 1, sewage is carried out the anaerobic hydrolysis reaction in anaerobic pond, then introduce the aeration tank and carry out aerobic reaction; Step 2, the water body after will processing through aerobic reaction is introduced the anti-nitration reaction pond and is carried out anti-nitration reaction; Step 3, water body after anti-nitration reaction is processed further is processed into the middle water of the middle water water quality standard that reaches national regulation, middle water enters the municipal effluent sewerage pipeline network, returns in the anaerobic pond to continue performing step 1 again after use, wherein, produce active sludge when carrying out above-mentioned steps 1 to step 3, active sludge treatment is become in fertilizer, material of construction and the soil improvement agent one or more.
Preferably, with described active sludge successively through the organic solvent extraction degradable plastics and the residual residue of extraction behind the degradable plastics carried out heavy metal stabilization process, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps, described active sludge is extracted microbial proteinous through acid system hydrolysis/alkali process hydrolysis successively, and carry out heavy metal stabilization and process extracting residual residue behind the microbial proteinous, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps, described active sludge is extracted microbial proteinous through organic solvent extraction degradable plastics, acid system hydrolysis/alkali process hydrolysis successively, and carry out heavy metal stabilization and process extracting residual residue behind the microbial proteinous, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps, with described active sludge directly after heavy metal stabilization is processed, to produce in fertilizer, material of construction and the soil improvement agent one or more.
Preferably, during processing, use heavy metal stabilization in hydrogen sulfide, barium sulphide, sodium sulphite, the sulfurated lime one or more as stablizer, meet water-insoluble heavy metal sulfide so that heavy metal is transformed into, or use the described stablizer of water glass, so that heavy metal is transformed into silicate.
Preferably, extracting with alkali process hydrolysis under the situation of microbial proteinous, formed heavy metal hydroxide when extracting microbial proteinous with alkali process hydrolysis carries out forming the water-insoluble oxide compound behind the thermal dehydration.
Preferably, material of construction comprises the albumen plastics.
Preferably, with the water body after anti-nitration reaction is processed, successively through catalytic ozonation reaction, embrane method desalination, sterilization, so that water outlet reaches the middle water water quality standard of national regulation; Perhaps, with the water body after anti-nitration reaction is processed, successively through catalytic ozonation reaction, sterilization, so that water outlet reaches the middle water water quality standard of national regulation.
Preferably, with any replacement catalytic ozonation reaction in embrane method, supersonic method, microwave method, supercritical oxidation process, the advanced chemical oxidation.
Preferably, the catalytic ozonation reaction adopts the gac that carries nano titanium oxide as catalyzer.
Preferably, when carrying out the anaerobic hydrolysis reaction, the dissolved oxygen DO≤1.5mg/L in the water; When carrying out the aerobic reaction processing, the dissolved oxygen DO 〉=3.0mg/L in the water; When carrying out anti-nitration reaction, the dissolved oxygen DO≤2.0mg/L in the water.
Preferably, all adopt in suspended filter material, cobble, various sand material, active suspended particle mud, active sludge, the various plastics one or more as microbe carrier in anaerobic pond, aeration tank, the anti-nitration reaction pond, the consumption of microbe carrier is 1-10% (volumn concentration).
Beneficial effect of the present invention is: carry out the anaerobic hydrolysis reaction by the water body with the front end of aeration tank, and then carry out successively aerobic treatment and anti-nitration reaction and process, water body after anti-nitration reaction is processed further is processed into the middle water of the middle water water quality standard that reaches national regulation, the present invention can produce meet national regulation middle water with recycle, and the present invention also produces degradable plastics with active sludge, microbial proteinous, agricultural composite fertilizer, soil improvement agent etc., thereby so that sewage sludge become can recycle resource, formed the Ecological Industry Chain of a zero release.
Description of drawings
Fig. 1 is the treatment scheme of the conventional activated sludge process of prior art;
Fig. 2 is the traditional sludge processing technological flow;
Fig. 3 is the advanced treatment of sewage sludge of the present invention and the schema of comprehensive utilization process, show the flow process that is treated to middle water with the water body after the denitrification processing, and the flow process of being produced degradable plastics, microbial proteinous, agricultural composite fertilizer, soil improvement agent etc. by active sludge.
Embodiment
Below describe the specific embodiment of the present invention in detail referring to accompanying drawing.
For ease of understanding the present invention, referring to Fig. 1 and Fig. 2 prior art is described first.Flow through successively preliminary sedimentation tank, aeration tank, second pond of waste water shown in Fig. 1 (comprising town sewage) then discharged, the mud part that second pond produces is discharged as excess sludge, another part is back to the aeration tank front end as returned sluge, also shows among Fig. 1 to aeration tank supply air.Fig. 2 illustrates the sludge treatment technique flow process, from preliminary sedimentation tank and second pond mud successively through concentrated, digestion, adjusting, dehydration, stabilization treatment, then qualified discharge.
Different from the prior art shown in Fig. 1 and Fig. 2, the present invention is that the sewage sludge to sewage work carries out advanced treatment, be middle water (the middle water water quality standard that meets national regulation) recycling with advanced treatment of wastewater, sludge deep is processed into product, thereby so that the sewage sludge of urban wastewater treatment firm become can recycle resource, formed the Ecological Industry Chain of a zero release.
Specifically see also shown in Figure 3ly, the advanced treatment of sewage sludge of the present invention and comprehensive utilization process comprise the steps: step 1, and town sewage is carried out the anaerobic hydrolysis reaction in anaerobic pond, then introduce the aeration tank and carry out aerobic reaction; Step 2, the water body after will processing through aerobic reaction is introduced the anti-nitration reaction pond and is carried out anti-nitration reaction; And step 3, with the water body after anti-nitration reaction is processed, successively through catalytic ozonation reaction (adopting the gac that carries nano titanium oxide as catalyzer), embrane method desalination, sterilization, make water outlet reach the middle water water quality standard of national regulation, so that process water, agricultural water, urban landscaping water to be provided, middle water enters the town sewage sewerage pipeline network after use, enter into again anaerobic pond and continue circulation to return performing step 1.When the water body of processing behind anti-nitration reaction, reduce salinity with the embrane method desalination, more energy-conservation than reverse osmosis method and electroosmotic drainage.But, if the salinity of the water body after the catalytic ozonation reaction treatment meets the requirements, can omit embrane method desalination step.In addition, as a kind of substitute mode, can also replace aforesaid catalytic ozonation reaction with in embrane method, supersonic method, microwave method, supercritical oxidation process, the advanced chemical oxidation any, wherein, embrane method, supersonic method, microwave method, supercritical oxidation process, advanced chemical oxidation are known prior art, no longer describe in detail herein.
Furthermore, the essence of step 1 is among the present invention, the fore-end water body of aeration tank is carried out the anaerobic hydrolysis reaction, and then carry out aerobic reaction, and the anaerobic hydrolysis reaction had both made organism be hydrolyzed, and accelerated the organic degraded of aerobic section; Improve again the output of Dth phosphorus flora, for follow-up aerobic section a large amount of " suction phosphorus " causes dephosphorization to lay the first stone; Moreover, be different from second pond of the prior art, the present invention replaces second pond with the anti-nitration reaction pond, in the anti-nitration reaction pond, to carry out anti-nitration reaction, further to denitrogenate, thereby make the processing of sewage not only save the energy, and improved the output of microorganism, namely improved the output of Chemicals and microbial proteinous; Also improved water treatment efficiency.
Continuation is referring to Fig. 3, and except comprising step 1 to the sewage disposal step of step 3, sewage sludge advanced treatment and the comprehensive utilization process of sewage work of the present invention also comprise the active sludge treatment step.Particularly, the active sludge that when according to above-mentioned steps 1-3 town sewage being processed, produces, pass through successively organic solvent extraction degradable plastics (poly-hydroxy fatty acid is called for short PHA), remaining albumen fragment residue after extracting degradable plastics is implemented hydrolysis method (acid system hydrolysis or alkali process hydrolysis) extraction microbial proteinous, residual residue after extracting microbial proteinous is carried out heavy metal stabilization to be processed, then, to after processing, heavy metal stabilization (contain abundant nitrogen by remaining sludge residue, phosphorus, potassium and organic matter etc.), through oven dry, agricultural composite fertilizer is made in pulverizing or granulation, soil improvement agent or as material of construction.Wherein, the equipment of finishing granulation can be in disc granulation equipment, extruding granulation equipment, the cylinder granulating equipment one or more; Certainly, also can drying after not granulation, but form powder-like product.
It may be noted that, the treatment step to active sludge that the present invention relates to, except above-mentioned embodiment, can also be following three kinds of embodiments, that is: with active sludge successively through the organic solvent extraction degradable plastics and the residual residue of extraction behind the degradable plastics carried out heavy metal stabilization process, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps, active sludge is extracted microbial proteinous through acid system hydrolysis/alkali process hydrolysis successively, and the residual residue of extracting behind the microbial proteinous is carried out the heavy metal stabilization processing, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps, directly after heavy metal stabilization is processed, producing in fertilizer, material of construction and the soil improvement agent one or more, the embodiment of above treatment step to active sludge all can be realized zero release with active sludge.Further, described material of construction can be the various sludge building materials such as albumen plastics.
In above-mentioned active sludge treatment step, the alkali of using in the alkali process hydrolysis is one or more in sodium hydroxide, potassium hydroxide, magnesium oxide, calcium hydroxide, the calcium oxide; The stablizer that heavy metal stabilization uses in processing is in hydrogen sulfide, barium sulphide, sodium sulphite, the sulfurated lime one or more, so that being transformed into, heavy metal meets water-insoluble heavy metal sulfide, perhaps stablizer is silicate, so that heavy metal is transformed into silicate.Using alkaline process to produce under the situation of microbial proteinous, formed heavy metal hydroxide when extracting microbial proteinous with alkali process hydrolysis carries out forming the water-insoluble oxide compound behind the thermal dehydration.
Further, below in conjunction with accompanying drawing 3, from four aspects, that is, the stabilization treatment of the extraction of the main technique that town sewage is processed and operating parameter, degradable plastics, extraction, production composite fertilizer and the heavy metal thereof of microbial proteinous describes respectively embodiments of the invention in detail.
(1) water treatment main technique and operating parameter:
1, adopt treatment process:
The anaerobic hydrolysis reaction (oxygen in water DO≤1.5mg/L) → aerobic reaction (oxygen in water DO 〉=3.0mg/L) → anti-nitration reaction (oxygen in water DO≤2.0mg/L);
2, adopt suspension biological carrier filling: consumption is about the 1-10% (volumn concentration) of water body, (be all to adopt suspended filter material as microbe carrier in anaerobic pond, aeration tank, the anti-nitration reaction pond, the consumption of microbe carrier is 1-10%), the consumption of microbe carrier is preferably 8% in the present embodiment; Depth of water 5.5m; That is, the present invention changes activated sludge process of the prior art into suspension carrier organism filter tank method, and is not only efficient, and sludge output is few.Except suspended filter material, can also adopt in cobble, various sand material, active suspended particle mud, active sludge, the various plastics one or more as microbe carrier.
3, daily handling ability: 50,000 t/d;
Water inlet principal pollutant indexs (Mg/L of unit)
| The principal pollutant title | COD | BOD | Ammonia nitrogen | SS | P | Petroleum-type |
| The water inlet index | 200-300 | ≤100 | 80-90 | ≤200 | ≤5 | ≤20 |
4, process rear water outlet principal pollutant index:
Conventional activated sludge process and the present invention process rear water body principal pollutant index and see Table 1:
Table 1 municipal sewage plant water quality emission standard and the present invention process rear water quality table look-up (mg/L of unit)
5, main operating parameter relatively
The main operating parameter of table 2 conventional activated sludge process and the present invention relatively
| Project | Conventional activated sludge process | The present invention |
| BOD loading/(g/m 3d) | 300-800 | 300-2000 |
| Spoil disposal pitch time (d) | 2-4 | ≈30 |
| Reflux ratio % | 30-100 | Nothing |
| Gas-water ratio (v/v) | 3-7 | 1-5 |
| BOD clearance % | 80-92 | ≥95 |
Gas-water ratio in the table 2 (v/v) expression, the ratio of the volume of the gas that passes through in the unit time and the volume of water.
(2) extraction of degradable plastics (PHA) in the microorganism cells in mud or the water body
The mud (water ratio＜15%) of microorganism cells body will be rich in, be collected in and extract in degradable plastics (poly-hydroxy fatty acid PHA) container, the organic solvent extractionprocess extraction process of knowing altogether that adopts this specialty to be familiar with: add ethyl acetate or other organic solvents (volumn concentration: v/v=1: 1), in 50-60 ℃ of insulation, fully mix 0.5-5 hour, static, layering, filtration (residue 1# is stand-by); Get organic phase, add normal heptane, the limit edged stirs until PHA separates out, vacuum filtration, its solid is clean with a small amount of ethanol, drying is PHA product; Its filtrate fractionation ethyl acetate and normal heptane, recycling.
(3) extract microbial proteinous
Adopt the familiar general operation technology of this specialty with extracting the residue 1# that produces behind the degradable plastics: example adds alkali (can be in sodium hydroxide, potassium hydroxide, the calcium hydroxide a kind of) and regulates its PH10-13, temperature of reaction is reaction 0.5-5 hour that is hydrolyzed between 100 ℃-120 ℃, then carry out solid-liquid separation, obtain residue 2# and protein solution, protein liquid is concentrated, spraying drying, the microbial proteinous powder.
(4) stabilization treatment of production agricultural composite fertilizer and heavy metal thereof
With the residue 2# behind the said extracted microbial proteinous, add the heavy metal stabilizer of equivalent or utilize drying course that heavy metal hydroxide is changed into stable oxide compound, fully stir evenly, drying, granulation, make agricultural composite fertilizer or soil improvement agent etc.By table 3, as seen from Table 4: it is fertile that China's active sludge can be done farming, although Heavy Metals in Sludge surpasses national agricultural sludge standard (see Table 3, table 4), but use for a long time, can be in soil accumulation or with the rainwater pollution surface water and underground water, so that the stabilization of heavy metal still seems is particularly important.
The present invention is converted into sulfide, silicate, oxide compound with all heavy metals makes it become stable state.Namely extracting that the microbial proteinous hydrolysis is finished, in the sepn process, adopting the adding stablizer while separating; Its stablizer can be wherein one or more of silicate, hydrogen sulfide, sodium sulphite, sulfurated lime, barium sulphide; The total amount equivalents that the amount of stablizer is pressed heavy metal adds, and fully stirs 0.5-2h; Then in 50-80 ℃ of mummification, granulation, agricultural composite fertilizer.
Table 3 China general urban wastewater treatment firm sludge heavy-metal content (mg/kg of unit)
The comparison of organic N-P-K content and farm manure in the general urban wastewater treatment firm mud of table 4 China
| Project | Organic matter, % | Nitrogen, % | Phosphorus, % | Potassium, % |
| Poplar man fort sewage purification plant, Taiyuan City | 52 | 1.97 | 1.72 | 0.53 |
| Quyang, Shanghai purification plant | 75 | 1.84 | 0.42 | 0.44 |
| Shanghai Chang Qiao purification plant | 66 | 3.12 | 0.224 | 0.315 |
| Tianjin discipline village sewage work | 48-53 | 2.4-3.9 | 1.2-3.5 | 0.32-0.43 |
| Hog manure | 25.0 | 0.45 | 0.083 | 0.1 |
| Stable is fertile | 25.0 | 0.58 | 0.122 | |
| Ox barnyard manure | 20.0 | 0.34 | 0.200 | |
| Sheep barnyard manure | 31.8 | 0.84 | 1.100 |
Above-mentioned only is exemplary embodiment, and the production technique of various products can suitably be adjusted according to physical condition; The output of product is relevant with Pseudomonas and the density of microorganism in the mud, can suitably adjust according to the composition of nutritive salt in the sewage, to increase output; Accelerate simultaneously sewage treatment process; The above, only be one of embodiment of sewage sludge advanced treatment of the present invention and extraction related products, produce microbial proteinous, degradable plastics, agriculture composite fertilizer, building materials, industry and agriculture with fresh water etc. by sewage and mud, can also develop into the Ecological Industry Chain of multiple other products.
It may be noted that, more than be as processing object take the sewage sludge of sewage work, but the present invention is not limited to this, obviously be appreciated that the present invention also is applicable to advanced treatment and the comprehensive utilization of the sewage sludge of all sewage works that other industrial and mining enterprises, public institution etc. dispose of sewage with biochemical process.
To sum up, the advanced treatment of sewage sludge provided by the invention and comprehensive utilization process, can produce the middle water that meets national regulation, realize the effluent cycle utilization with this, and the present invention is with the Biological resources utilization in the active sludge, extract degradable plastics, microbial proteinous, its residue is made agricultural composite fertilizer, soil improvement agent etc., thereby so that sewage sludge become can recycle resource, the developing ecology industrial chain, make urban wastewater treatment firm become a water resources and chemical industry, the factory of biotechnological formulation, not only create economic benefit, environmental benefit, the unification of social benefit, and reach the optimum Sustainable development of ecotope, reach the zero release of sewage work.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the advanced treatment of sewage work's sewage sludge and comprehensive utilization process is characterized in that, comprise the steps:
Step 1 is carried out the anaerobic hydrolysis reaction with sewage in anaerobic pond, then introduce the aeration tank and carry out aerobic reaction;
Step 2, the water body after will processing through aerobic reaction is introduced the anti-nitration reaction pond and is carried out anti-nitration reaction;
Step 3 further is processed into the water body after anti-nitration reaction is processed the middle water of the middle water water quality standard that reaches national regulation, and described middle water enters the municipal effluent sewerage pipeline network, turns back in the described anaerobic pond to continue to carry out described step 1 again after use,
Wherein, produce active sludge when carrying out above-mentioned steps 1 to step 3, described active sludge treatment is become in fertilizer, material of construction and the soil improvement agent one or more.
2. advanced treatment and the comprehensive utilization process of sewage work according to claim 1 sewage sludge is characterized in that,
Described active sludge is passed through the organic solvent extraction degradable plastics successively, and the residual residue of extraction behind the degradable plastics carried out heavy metal stabilization process, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps
Described active sludge is extracted microbial proteinous through acid system hydrolysis/alkali process hydrolysis successively, and the residual residue of extracting behind the microbial proteinous is carried out the heavy metal stabilization processing, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps
Described active sludge is extracted microbial proteinous through organic solvent extraction degradable plastics, acid system hydrolysis/alkali process hydrolysis successively, and carry out heavy metal stabilization and process extracting residual residue behind the microbial proteinous, to produce in fertilizer, material of construction and the soil improvement agent one or more; Perhaps
With described active sludge directly after heavy metal stabilization is processed, to produce in fertilizer, material of construction and the soil improvement agent one or more.
3. advanced treatment and the comprehensive utilization process of sewage work according to claim 2 sewage sludge is characterized in that,
During processing, use described heavy metal stabilization in hydrogen sulfide, barium sulphide, sodium sulphite, the sulfurated lime one or more as stablizer, so that being transformed into, described heavy metal meets water-insoluble heavy metal sulfide, or use the described stablizer of water glass, so that described heavy metal is transformed into silicate.
4. advanced treatment and the comprehensive utilization process of sewage work according to claim 2 sewage sludge is characterized in that,
Extracting with alkali process hydrolysis under the situation of microbial proteinous, formed heavy metal hydroxide when extracting microbial proteinous with alkali process hydrolysis carries out forming the water-insoluble oxide compound behind the thermal dehydration.
5. advanced treatment and the comprehensive utilization process of sewage work according to claim 2 sewage sludge is characterized in that, described material of construction comprises the albumen plastics.
6. advanced treatment and the comprehensive utilization process of each described sewage work sewage sludge is characterized in that according to claim 1-5,
With the water body after anti-nitration reaction is processed, successively through catalytic ozonation reaction, embrane method desalination, sterilization, so that water outlet reaches the middle water water quality standard of national regulation; Perhaps,
With the water body after anti-nitration reaction is processed, successively through catalytic ozonation reaction, sterilization, so that water outlet reaches the middle water water quality standard of national regulation.
7. advanced treatment and the comprehensive utilization process of sewage work according to claim 6 sewage sludge, it is characterized in that, replace described catalytic ozonation reaction with in embrane method, supersonic method, microwave method, supercritical oxidation process, the advanced chemical oxidation any.
8. advanced treatment and the comprehensive utilization process of sewage work according to claim 6 sewage sludge is characterized in that,
Described catalytic ozonation reaction adopts the gac that carries nano titanium oxide as catalyzer.
9. advanced treatment and the comprehensive utilization process of each described sewage work sewage sludge is characterized in that according to claim 1-5, when carrying out described anaerobic hydrolysis reaction, and the dissolved oxygen DO≤1.5mg/L in the water; When carrying out described aerobic reaction processing, the dissolved oxygen DO 〉=3.0mg/L in the water; When carrying out described anti-nitration reaction, the dissolved oxygen DO≤2.0mg/L in the water.
10. advanced treatment and the comprehensive utilization process of sewage work according to claim 9 sewage sludge, it is characterized in that, all adopt in suspended filter material, cobble, various sand material, active suspended particle mud, active sludge, the various plastics one or more as microbe carrier in described anaerobic pond, aeration tank, the anti-nitration reaction pond, the consumption of described microbe carrier is 1-10% (volumn concentration).
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| CN104118964A (en) * | 2014-06-19 | 2014-10-29 | 山东西王糖业有限公司 | Method for separating active protein in sewage treatment process |
| CN106277602A (en) * | 2016-08-29 | 2017-01-04 | 上海禾元环保集团有限公司 | The Treated sewage reusing processing system of industrial wastewater and method |
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN106865924A (en) * | 2017-02-15 | 2017-06-20 | 湖南省经济地理研究所 | A kind of method for innocent treatment of Sediments |
| CN108218188A (en) * | 2018-02-11 | 2018-06-29 | 华电电力科学研究院有限公司 | The complementary coupled system and its implementation that a kind of combustion gas distributed energy is recycled with water resource |
| CN110950719A (en) * | 2019-10-29 | 2020-04-03 | 北京城市排水集团有限责任公司 | Coated controlled release fertilizer and preparation method thereof |
| CN116768427A (en) * | 2023-08-15 | 2023-09-19 | 北京百灵天地环保科技股份有限公司 | Advanced treatment process for industrial wastewater |
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