CN202945127U - System for backflow utilization of excess sludge - Google Patents
System for backflow utilization of excess sludge Download PDFInfo
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- CN202945127U CN202945127U CN2012207067263U CN201220706726U CN202945127U CN 202945127 U CN202945127 U CN 202945127U CN 2012207067263 U CN2012207067263 U CN 2012207067263U CN 201220706726 U CN201220706726 U CN 201220706726U CN 202945127 U CN202945127 U CN 202945127U
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- dephosphorization
- sludge
- tank
- pipeline
- precipitation concentration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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Abstract
The utility model discloses a system for backflow utilization of excess sludge. The system comprises a hybrid reaction tank, a precipitation concentration tank and a phosphorus removal backflow tank, wherein a liquid inlet passage for sludge to pass in and an alkali liquor feeding pipeline for alkali liquor to pass in are connected to the hybrid reaction tank, and an outlet passage of the hybrid reaction tank is communicated with the precipitation concentration tank; a water outlet pipeline is arranged on the side wall of the upper part of the precipitation concentration tank and is communicated with the phosphorus removal backflow tank, and a sludge outlet pipeline is arranged at the bottom of the precipitation concentration tank; and a phosphorus removing agent feeding pipeline is arranged on and communicated with the phosphorus removal backflow tank, a supernatant fluid water outlet passage is arranged on the side wall of the upper part of the phosphorus removal backflow tank, and a phosphorus removal sludge outlet pipeline is arranged at the bottom of the phosphorus removal backflow tank. By adopting the system, organic substances in the excess sludge can be degraded, separated and released as an additional carbon source, so that the yield of the excess sludge can be reduced, the subsequent treatment cost of the excess sludge is reduced, and the excess sludge can also be used as a low-cost additional carbon source to make up the current situation that the carbon source in municipal wastewater water penetration is insufficient.
Description
Technical field
The utility model relates to a kind of sewage treatment area, and especially a kind of residual sludge reflux of activated sludge process water treatment utilizes system.
Background technology
Along with the raising day by day of the level of urbanization and living standards of the people, the daily water yield increases, sewage disposal
The factors such as the Facilities Construction difficulty is large cause municipal effluent usually to present organic concentration low, and nitrogen and phosphorus content is higher.Especially Shelter in South China Cities, with heavy rainfall, and the collection mode of sanitary sewage usually links together with Xiaohegou, namely directly tackles the stream sewage is introduced Sewage Plant, further reduced and advanced factory's organic concentration, strengthens intractability.Municipal effluent water quality presents that organic concentration is more and more lower, nitrogen phosphorus nutrition thing is more and more higher, the phenomenon of the C/N of sewage, C/P ratio continuous decrease.For most of Sewage Plant, realize that synchronous denitrification dephosphorizing itself just has certain difficulty, and in low carbon source treatment system, this problem shows more obviously; The emission standard requirement is further strict in addition, guarantees when guaranteeing denitrogenation in low carbon source treatment system that therefore phosphor-removing effect and qualified discharge seem particularly important.
At present, China's most cities Sewage Plant is lower for entering organic matter of water concentration, can't guarantee that the conventional means of synchronous denitrification dephosphorizing problem is for to add the dephosphorization medicament, to add methyl alcohol in the denitrification section at second pond.This operational mode is to cause the high major cause of low carbon source Sewage Plant working cost obviously.Therefore, at present the mode that adds carbon source that adopts of Sewage Plant has not only increased Financial cost, has also run counter to the aim of energy-saving and emission-reduction, less energy-consumption simultaneously.
Simultaneously, activated sludge process is present most widely used dirty water living creature processing technique, but there is the drawback of a maximum in it always, can produce a large amount of excess sludges exactly.At present, excess sludge is processed and is mostly adopted landfill or burning, these ordinary methods can be brought new negative effect to environment again in lignin-sludge, in addition, investment and the working cost of sludge treatment are huge, can account for 25%-65% of whole Sewage Plant investment and working cost, become the heavy burden that Sewage Plant faces.Although the municipal wastewater moisture percentage in sewage sludge is high, viscosity is strong, be difficult for realizing mud-water separation, but wherein contain a large amount of organism, show according to related data, the organic content of active sludge is more than 70%, and organic composition comprises carbohydrate 10%～20%, fat 20%～40%, protein 30%～40%.
Therefore, the applicant considers, if can design a kind of system, the mud that the activated sludge process water treatment produces can be recycled in the sewage water inlet, improve the carbon source ratio of sewage water inlet, can either reduce excess sludge production, also can reduce the cost of sewage water inlet supplementary carbon source.
The utility model content
For the deficiencies in the prior art, technical problem to be solved in the utility model is, how to provide a kind of simple in structure, the residual sludge reflux that the excess sludge that activated sludge process produces is recycled can be utilized system, it can be with the organic matter degradation in excess sludge, separation, release, carbon source as a supplement, not only can reduce excess sludge production, reduce the subsequent treatment cost of excess sludge, and can also make up as a kind of supplementary carbon source of cheapness not enough this present situation of carbon source in the municipal wastewater water inlet.
In order to solve the problems of the technologies described above, adopted following technical scheme in the utility model:
A kind of residual sludge reflux utilizes system, it is characterized in that, comprise mixed reaction pond, precipitation concentration basin and dephosphorization backflow pool, be connected with the feed pathway that enters for mud on described mixed reaction pond and add pipeline for the alkali lye that alkali lye enters, the exit passageway of mixed reaction pond is communicated with described precipitation concentration basin; Be provided with outlet conduit on described precipitation concentration basin upper portion side wall and be communicated with described dephosphorization backflow pool, precipitation concentration basin bottom is provided with the sludge outlet pipeline; Be communicated with on described dephosphorization backflow pool and be provided with dephosphorization agent and add pipeline, dephosphorization backflow pool upper portion side wall also is provided with the supernatant liquor water exit, and dephosphorization backflow pool bottom is provided with dephosphorization sludge outlet pipeline.
When the utility model uses, part residual active sludge with the activated sludge process generation, be input in mixed reaction pond by feed pathway, add pipeline by alkali lye in mixed reaction pond simultaneously and add alkali lye, mud is stayed for some time at mixed reaction pond fully react with alkali lye, carry out the alkaline hydrolysis fermentative processing.Mud mixed liquid through the alkaline hydrolysis fermentative processing drains into the precipitation concentration basin through the exit passageway of mixed reaction pond, carrying out inertia mud separates with rich carbon supernatant liquor, after separating, gained carbonaceous sources supernatant liquor enters next processing links-dephosphorization backflow pool through outlet conduit, the difficult alkaline hydrolysis mud of precipitation gained effluxes through the sludge outlet pipeline through the bottom, during concrete enforcement, can drain into the outward transport of dewatering between dehydration and process.In the dephosphorization backflow pool, add pipeline by dephosphorization agent and add dephosphorization agent in the dephosphorization backflow pool, carry out the external recycle of sludge dephosphorization and process, be back to contained phosphor contaminant in the carbon source water that reuses in bio-reactor with further reduction.The final supernatant liquor that obtains in the dephosphorization backflow pool can be discharged to Sewage Plant water inlet place through the supernatant liquor water exit, utilizes as carbon source, to improve the carbon source ratio of Sewage Plant water inlet, to improve wastewater treatment efficiency.Like this, waste sludge recycling production carbon source need not additionally to buy the carbon source such as methyl alcohol again and adds, and provides cost savings.
Wherein, in mixed reaction pond, alkaline hydrolysis fermentative processing principle is: (as pH 〉=10) microbial cell has lost the part activity under higher pH value, can not keep equilibrium osmotic pressure well and be damaged, after alkaline matter enters cell, react by different way with cell walls (comprising the saponification reaction with lipid material), caused the dissolving of cytolemma, intracellular organic matter is released gradually; On the other hand, when the pH value raises, the mud granule surface with negative charge gradually increase, thereby produced larger electrostatic repulsion, result parses part extracellular polymeric (ECP), causes the SCOD Enrichment.
As optimization, also be provided with between dosing, have the alkali lye that adds pipeline communication with alkali lye between described dosing and add the pond, also have the dephosphorization agent that adds pipeline communication with dephosphorization agent and add the pond.Like this, can concentrate medicine is added to manage, improve system controllability and measurability.
In sum, the utility model can be with the organic matter degradation in excess sludge, separation, release, carbon source as a supplement, not only can reduce excess sludge production, reduce the subsequent treatment cost of excess sludge, and can also make up as a kind of supplementary carbon source of cheapness not enough this present situation of carbon source in the municipal wastewater water inlet.
Description of drawings
Fig. 1 is structural representation sketch of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Be illustrated in fig. 1 shown below, a kind of residual sludge reflux utilizes system, comprise mixed reaction pond 1, precipitation concentration basin 2 and dephosphorization backflow pool 3, be connected with the feed pathway 4 that enters for mud on described mixed reaction pond 1 and add pipeline 5 for the alkali lye that alkali lye enters, the exit passageway 6 of mixed reaction pond 1 is communicated with described precipitation concentration basin 2; Be provided with outlet conduit 7 on described precipitation concentration basin 2 upper portion side wall and be communicated with described dephosphorization backflow pool 3, precipitation concentration basin 2 bottoms are provided with sludge outlet pipeline 8; Be communicated with on described dephosphorization backflow pool 3 and be provided with dephosphorization agent and add pipeline 9, dephosphorization backflow pool 3 upper portion side wall also are provided with supernatant liquor water exit 10, and dephosphorization backflow pool 3 bottoms are provided with dephosphorization sludge outlet pipeline 11.During concrete enforcement, also be provided with between dosing 12, have in 12 between described dosing and add with alkali lye the alkali lye that pipeline 5 is communicated with and add pond 13, also have and add with dephosphorization agent the dephosphorization agent that pipeline 9 is communicated with and add pond 14.During concrete enforcement, described feed pathway 4 is connected with activated sludge discharged pipeline and supplies the part excess sludge to enter in mixed reaction pond 1, supernatant liquor water exit 10 on described dephosphorization backflow pool 3 can be connected and be used for raising water-inlet carbon source ratio with Sewage Plant water inlet, the dephosphorization sludge outlet pipeline 11 that precipitates the sludge outlet pipeline 8 of concentration basin 2 bottoms and dephosphorization backflow pool 3 bottoms can be switched to be connected to after a pipeline and carry out processed between dehydration.
Test through concrete enforcement, the utlity model has following characteristics and meaning:
(1) can significantly reduce excess sludge production, reduce dehydration, outward transport sludge quantity, reaching saves production cost controls the double effects of sludge yield with the source.
(2) can alleviate the technological deficiency that the denitrification dephosphorization technique that causes due to city domestic sewage carbon source deficiency reduces nitrogen, phosphorus removal ability.
(3) the bypass dephosphorization process that increases at external recycle of sludge can be strengthened the removal ability to phosphorus, improves the utilization ratio of chemical dephosphorization agent, further reduces the content of phosphoric in water outlet.
(4) required structures are built simply, and required equipment and medicament easily obtain, and operation condition is more easily grasped, controlled, and both can be applied to newly-built Sewage Plant, are applicable to again the transformation of old Sewage Plant, also can be Sewage Plant and propose the mark transformation reference is provided.
Claims (2)
1. a residual sludge reflux utilizes system, it is characterized in that, comprise mixed reaction pond, precipitation concentration basin and dephosphorization backflow pool, be connected with the feed pathway that enters for mud on described mixed reaction pond and add pipeline for the alkali lye that alkali lye enters, the exit passageway of mixed reaction pond is communicated with described precipitation concentration basin; Be provided with outlet conduit on described precipitation concentration basin upper portion side wall and be communicated with described dephosphorization backflow pool, precipitation concentration basin bottom is provided with the sludge outlet pipeline; Be communicated with on described dephosphorization backflow pool and be provided with dephosphorization agent and add pipeline, dephosphorization backflow pool upper portion side wall also is provided with the supernatant liquor water exit, and dephosphorization backflow pool bottom is provided with dephosphorization sludge outlet pipeline.
2. residual sludge reflux as claimed in claim 1 utilizes system, it is characterized in that, also is provided with between dosing, has the alkali lye that adds pipeline communication with alkali lye between described dosing and adds the pond, also has the dephosphorization agent that adds pipeline communication with dephosphorization agent and adds the pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207067263U CN202945127U (en) | 2012-12-20 | 2012-12-20 | System for backflow utilization of excess sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207067263U CN202945127U (en) | 2012-12-20 | 2012-12-20 | System for backflow utilization of excess sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202945127U true CN202945127U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012207067263U Expired - Fee Related CN202945127U (en) | 2012-12-20 | 2012-12-20 | System for backflow utilization of excess sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747625A (en) * | 2020-08-06 | 2020-10-09 | 安徽建筑大学 | Carbon source recovery-based municipal sludge physicochemical and biochemical combined treatment and reduction method |
-
2012
- 2012-12-20 CN CN2012207067263U patent/CN202945127U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747625A (en) * | 2020-08-06 | 2020-10-09 | 安徽建筑大学 | Carbon source recovery-based municipal sludge physicochemical and biochemical combined treatment and reduction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20151220 |
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| EXPY | Termination of patent right or utility model |