CN104211266A - Wastewater treatment additional carbon resource cascade control device - Google Patents
Wastewater treatment additional carbon resource cascade control device Download PDFInfo
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- CN104211266A CN104211266A CN201410500358.0A CN201410500358A CN104211266A CN 104211266 A CN104211266 A CN 104211266A CN 201410500358 A CN201410500358 A CN 201410500358A CN 104211266 A CN104211266 A CN 104211266A
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Abstract
The invention discloses a wastewater treatment additional carbon resource cascade control device. A wastewater treatment device is composed of an anaerobic tank, an oxygen deficit tank, a 1# aerobiotic tank, a 2# aerobiotic tank, a 3# aerobiotic tank and a sedimentation tank which are connected with one another, a main PI controller is connected with an effluent nitrate measuring instrument and a 3# aerobiotic tank nitrate measuring instrument, and the main PI controller and an auxiliary PI controller are connected through a nitrate set value controlling line. The main PI controller is used for controlling effluent nitrate nitrogen concentration, the auxiliary PI controller is applied to rapidly avoiding outside disturbance, and a cascade control strategic method is formed. According to the cascade control strategic method, the feed quantity of an additional carbon resource can be rapidly determined according to inlet water load and the set value of the effluent nitrate nitrogen concentration, the dynamic property is good, the resistance to impact load is high, system effluent nitrate nitrogen and total nitrogen concentration can be greatly reduced, and the operation load of a wastewater treatment plant can be remarkably improved.
Description
Technical field
The present invention relates to a kind of sewage disposal additional carbon cascade controller, belong to environmental technology field.
Background technology
Current sewage disposal technology basic forming, but the eutrophication of the water body that nitrogen phosphorus excessive emissions causes, still that water pollutes the significant problem existing, sewage disposal no longer only take that to remove organism (COD etc.) be object, but should remove organism denitrogenation dephosphorizing again, reduce body eutrophication, traditional Biological Nitrogen Removal Processe, comprises the techniques such as A/0, improvement AA/0, oxidation ditch.Nitrogen Removal Mechanism is mainly by aminating reaction, nitration reaction and anti-nitration reaction, and denitrifying bacterium is under anoxia condition, and reduction nitrate, discharges molecular nitrogen (N
2) or nitrous oxide (N
2o) process, many bacteriums, actinomycetes and mould can utilize nitrate as nitrogen nutrition, and utilizing nitrite anions and nitrate radical is respiratory final electron acceptor(EA), and needing carbon source in sewage is electron donor, and nitrate reductase is become to nitrogen (N
2), be called denitrification or denitrogenation.Because Sewage Plant influent load is all changing all the time, water inlet carbon-nitrogen ratio has several times of the time differences, if lack carbon source denitrification, is suppressed and cannot carries out.Existing sewage disposal technology does not also add the Controlling System of carbon source, cannot realize denitrifying control, and carbon source adds the excessive systematic running cost that will cause to be increased.Therefore in sewage treatment process, need to control the amount of carbon source, set up and automatically control microsystem, realize the automatic control to additional carbon, reduce operation of sewage disposal system expense, reduce external disturbance and guarantee system stable operation.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of sewage disposal additional carbon cascade controller is provided, realization is controlled the automatic tandem that adds in right amount and realize of carbon source, reduces systematic running cost use, reduces external disturbance and guarantees system stable operation.
Object of the present invention is achieved through the following technical solutions: a kind of sewage disposal additional carbon cascade controller, waste disposal plant is by the anaerobic pond connecting successively, anoxic pond, 1# Aerobic Pond, 2# Aerobic Pond, 3# Aerobic Pond and settling tank form, described main PI controller connects water outlet nitrate survey meter and 3# Aerobic Pond nitrate survey meter, described main PI controller is connected by nitrate set(ting)value control line with secondary PI controller, apply main PI controller and control water outlet the concentration of nitrate nitrogen, apply secondary PI controller and overcome fast external disturbance, form cascade control strategy method.
Described anaerobic pond is provided with outer carbon source throwing device, and outer carbon source throwing device is connected by adding control line with secondary PI controller.
Described secondary PI controller connects anoxic pond nitrate survey meter.
The water outlet of described 3# Aerobic Pond connects respectively anaerobic pond and anoxic pond by inner circulating tube.
The shore pipe of described settling tank connects mud return line and excess sludge pipe, and mud return line connects water inlet pipe.
Principle of work of the present invention: water inlet enters anaerobic pond successively by water inlet pipe, anoxic pond, 1# Aerobic Pond, 2# Aerobic Pond, 3# Aerobic Pond, Aerobic Pond adopts blast aeration, by be filled with air in aeration tank, each aeration tank is filled with air capacity difference, reduce energy consumption, the concurrent raw nitration reaction of degradation of contaminant under microbial process, the water outlet of 3# Aerobic Pond connects respectively anaerobic pond and anoxic pond by inner circulating tube, by part mixed-liquor return to anaerobic pond and anoxic pond, a settling tank mud part is back to anaerobic pond feed-water end by mud return line, reach anti-digestion denitrogenation.
Using the difference of observed value of 3# Aerobic Pond nitrate survey meter and water outlet nitrate survey meter as the input of main PI controller, using the anoxic pond nitrate set(ting)value determined as the output of main PI controller, form tandem master loop.Using the difference of the output of master loop and the measured value of anoxic pond nitrate survey meter as the input of secondary PI controller simultaneously, using the throwing amount of carbon source as output, form subloop.
In sum, the invention has the beneficial effects as follows: PI controller principle is simple, be easy to realize, this cascade control strategy method can be determined rapidly the throwing amount of additional carbon according to the set(ting)value of influent load and water outlet the concentration of nitrate nitrogen, there is good dynamic characteristics, capacity of resisting impact load is strong, only need two nitrate nitrogen on-line sensors can in Sewage Plant, set up additional carbon cascade control method, can greatly reduce system water outlet nitrate nitrogen and total nitrogen concentration, significantly improve the operating load of Sewage Plant.
Accompanying drawing explanation
A kind of sewage disposal additional carbon of Fig. 1 cascade controller process schematic representation.
The title of mark in accompanying drawing: 1-water inlet; 2-water inlet pipe; 3-anaerobic pond; 4-anoxic pond; 5-1# Aerobic Pond; 6-2# Aerobic Pond; 7-3# Aerobic Pond; 8-settling tank; 9-water outlet; 10-aerating apparatus; 11-inner circulating tube; 12-mud return line; 13-excess sludge pipe; 14-outer carbon source throwing device; 15-secondary PI controller; 16-main PI controller; 17-anoxic pond nitrate survey meter; 18-add control line; 19-nitrate set(ting)value control line; 20-3# Aerobic Pond nitrate survey meter; 21-water outlet nitrate survey meter.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
A kind of sewage disposal additional carbon cascade controller, waste disposal plant is comprised of the anaerobic pond 3 connecting successively, anoxic pond 4,1# Aerobic Pond 5,2# Aerobic Pond 6,3# Aerobic Pond 7 and settling tank 8, described main PI controller 16 connects water outlet nitrate survey meter 21 and 3# Aerobic Pond nitrate survey meter 20, described main PI controller 16 is connected by nitrate set(ting)value control line 19 with secondary PI controller 15, apply main PI controller 16 and control water outlet the concentration of nitrate nitrogen, apply secondary PI controller 15 and overcome fast external disturbance, form cascade control strategy method.
Described anaerobic pond 3 is provided with outer carbon source throwing device 14, and outer carbon source throwing device 14 is connected by adding control line 18 with secondary PI controller 15.
Described secondary PI controller 15 connects anoxic pond nitrate survey meter 17.
Described 3# Aerobic Pond 7 water outlets connect respectively anaerobic pond 3 and anoxic pond 4 by inner circulating tube 11.
The shore pipe of described settling tank 8 connects mud return line 12 and excess sludge pipe 13, and mud return line 12 connects water inlet pipe 2.
During the operation of this device: water inlet 1 enters anaerobic pond 3 successively by water inlet pipe 2, anoxic pond 4, 1# Aerobic Pond 5, 2# Aerobic Pond 6, 3# Aerobic Pond 7, Aerobic Pond adopts blast aeration, by be filled with air in aeration tank, each aeration tank is filled with air capacity difference, reduce energy consumption, the concurrent raw nitration reaction of degradation of contaminant under microbial process, 7 water outlets of 3# Aerobic Pond connect respectively anaerobic pond 3 and anoxic pond 4 by inner circulating tube 11, by part mixed-liquor return to anaerobic pond 3 and anoxic pond 4, settling tank 8 mud parts are back to anaerobic pond 3 feed-water ends by mud return line 12, reach anti-digestion denitrogenation.
Using the difference of 3# Aerobic Pond nitrate survey meter 20 and the observed value of water outlet nitrate survey meter 21 as the input of main PI controller 16, using the anoxic pond nitrate set(ting)value determined as the output of main PI controller 16, form tandem master loop.Using the difference of the output of master loop and the measured value of anoxic pond nitrate survey meter 17 as the input of secondary PI controller 15 simultaneously, using the throwing amount of carbon source as output, form subloop.
According to experimental results show that: adopt after this sewage disposal additional carbon cascade controller, water inlet total nitrogen when changing between 85mg/L, can make water outlet the concentration of nitrate nitrogen maintain the set(ting)value 7mg/L left and right of system at 30mg/L.PI controller principle is simple, be easy to realize, and this cascade control strategy method can determine rapidly the throwing amount of additional carbon to have good dynamic characteristics according to the set(ting)value of influent load and water outlet the concentration of nitrate nitrogen, and capacity of resisting impact load is strong.
As mentioned above, just can realize preferably the present invention.
Claims (3)
1. a sewage disposal additional carbon cascade controller, is characterized in that: waste disposal plant is comprised of the anaerobic pond connecting successively (3), anoxic pond (4), 1# Aerobic Pond (5), 2# Aerobic Pond (6), 3# Aerobic Pond (7) and settling tank (8); Described main PI controller (16) connects water outlet nitrate survey meter (21) and 3# Aerobic Pond nitrate survey meter (20); Described main PI controller (16) is connected by nitrate set(ting)value control line (19) with secondary PI controller (15); Described anaerobic pond (3) is provided with outer carbon source throwing device (14), and outer carbon source throwing device (14) is connected by adding control line (18) with secondary PI controller (15); Described secondary PI controller (15) connects anoxic pond nitrate survey meter (17).
2. a kind of sewage disposal additional carbon cascade controller as claimed in claim 1, is characterized in that: described 3# Aerobic Pond (7) water outlet connects respectively anaerobic pond (3) and anoxic pond (4) by inner circulating tube (11).
3. a kind of sewage disposal additional carbon cascade controller as claimed in claim 1, is characterized in that: the shore pipe of described settling tank (8) connects mud return line (12) and excess sludge pipe (13), and mud return line (12) connects water inlet pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410500358.0A CN104211266A (en) | 2014-09-26 | 2014-09-26 | Wastewater treatment additional carbon resource cascade control device |
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| CN201410500358.0A CN104211266A (en) | 2014-09-26 | 2014-09-26 | Wastewater treatment additional carbon resource cascade control device |
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| CN201410500358.0A Pending CN104211266A (en) | 2014-09-26 | 2014-09-26 | Wastewater treatment additional carbon resource cascade control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704463A (en) * | 2019-02-26 | 2019-05-03 | 沧州市供水排水集团有限公司 | A kind of AAO process spent water treatment plant carbon source optimizing dosing system |
| CN110182952A (en) * | 2019-07-03 | 2019-08-30 | 广州博涛生物技术有限公司 | A kind of compounded carbons dosage automatic feedback and regulating device for municipal sewage plant AAO technique |
| CN115367877A (en) * | 2022-08-24 | 2022-11-22 | 上海禾元环保集团有限公司 | Continuous circulating flow biological nitrogen and phosphorus removal reactor and method |
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| JP2000015291A (en) * | 1998-07-06 | 2000-01-18 | Mitsubishi Heavy Ind Ltd | Method for treating flue gas desulfurization drainage |
| US20060249449A1 (en) * | 2005-05-03 | 2006-11-09 | University Of Western Ontario | Treatment of wastewater containing phosphorous and nitrogen |
| CN201587897U (en) * | 2009-06-10 | 2010-09-22 | 北京工业大学 | Drastic denitrification and phosphorus removal and process control device |
| CN201737808U (en) * | 2010-06-03 | 2011-02-09 | 北京城市排水集团有限责任公司 | Microenvironment synchronous denitrifying and dephosphorizing sewage treatment device with high sludge concentration |
| CN204079713U (en) * | 2014-09-26 | 2015-01-07 | 成都绿源新创环保科技有限公司 | A kind of sewage disposal additional carbon cascade controller |
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2014
- 2014-09-26 CN CN201410500358.0A patent/CN104211266A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000015291A (en) * | 1998-07-06 | 2000-01-18 | Mitsubishi Heavy Ind Ltd | Method for treating flue gas desulfurization drainage |
| US20060249449A1 (en) * | 2005-05-03 | 2006-11-09 | University Of Western Ontario | Treatment of wastewater containing phosphorous and nitrogen |
| CN201587897U (en) * | 2009-06-10 | 2010-09-22 | 北京工业大学 | Drastic denitrification and phosphorus removal and process control device |
| CN201737808U (en) * | 2010-06-03 | 2011-02-09 | 北京城市排水集团有限责任公司 | Microenvironment synchronous denitrifying and dephosphorizing sewage treatment device with high sludge concentration |
| CN204079713U (en) * | 2014-09-26 | 2015-01-07 | 成都绿源新创环保科技有限公司 | A kind of sewage disposal additional carbon cascade controller |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704463A (en) * | 2019-02-26 | 2019-05-03 | 沧州市供水排水集团有限公司 | A kind of AAO process spent water treatment plant carbon source optimizing dosing system |
| CN109704463B (en) * | 2019-02-26 | 2024-03-26 | 沧州市供水排水集团有限公司 | Carbon optimization feeding system of AAO process sewage treatment plant |
| CN110182952A (en) * | 2019-07-03 | 2019-08-30 | 广州博涛生物技术有限公司 | A kind of compounded carbons dosage automatic feedback and regulating device for municipal sewage plant AAO technique |
| CN115367877A (en) * | 2022-08-24 | 2022-11-22 | 上海禾元环保集团有限公司 | Continuous circulating flow biological nitrogen and phosphorus removal reactor and method |
| CN115367877B (en) * | 2022-08-24 | 2023-07-14 | 上海禾元环保集团有限公司 | Reactor and method for biological denitrification and dephosphorization by continuous circulation flow |
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Application publication date: 20141217 |