CN104007235A - Simulator for monitoring generation of nitrous oxide in process of aerobic biological treatment of sewage - Google Patents
Simulator for monitoring generation of nitrous oxide in process of aerobic biological treatment of sewage Download PDFInfo
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- CN104007235A CN104007235A CN201410216487.7A CN201410216487A CN104007235A CN 104007235 A CN104007235 A CN 104007235A CN 201410216487 A CN201410216487 A CN 201410216487A CN 104007235 A CN104007235 A CN 104007235A
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- sewage
- nitrous oxide
- control system
- retort
- monitoring
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Abstract
The invention discloses a simulator for monitoring generation of nitrous oxide in a process of aerobic biological treatment of sewage. According to the technical scheme, the simulator is characterized by comprising a reaction tank and a seal cover on the reaction tank, wherein the seal cover is provided with a sample inlet and a gas sampling opening; the gas sampling opening is connected with a gaseous nitrous oxide monitoring system; the reaction tank is internally provided with a dissolved nitrous oxide monitoring system, a dissolved oxygen control system, a pH control system and a temperature control system. The simulator can be used for monitoring the generation of N2O in the process of aerobic biological treatment of sewage and precisely measuring the generation quantity and variation principle of N2O in a reaction, and is suitable for research on the influences to the generation of N2O under environmental conditions of load of pollutants, dissolved oxygen, pH value, temperature and the like in sewage in the process of aerobic biological treatment of sewage.
Description
Technical field
The present invention relates to a kind of sewage aerobic biological treatment analogue means, be specifically related to a kind of analogue means that in sewage aerobic biological treatment process, nitrous oxide produces of monitoring.
Background technology
Along with the development of human economy and social progress, the greenhouse effect in global range strengthen gradually.N
2o is a kind of heat-flash greenhouse gases, and its 100 years global warming potential are CO
2296 times, N
2o has reached 5-6% to the contribution of global atmosphere greenhouse effect, and burst size is with annual 3% speed increment.Some researchs show, N
2o results from the processing procedure of municipal effluent in a large number, mainly produces nitrifying process and denitrification process that link is bio-denitrifying sewage.The object of wastewater treatment is the pollutant of removing in environment, but the greenhouse gases that discharge in its operational process have aggravated environmental pressure, have run counter to the original intention that people carry out wastewater treatment.Under the international environment being day by day restricted in carbon emission, the collection of carbon tax will be inevitable, the greenhouse gases that in the future produce in sewage disposal process are very likely implemented discharge charge, and the discharge that how to reduce greenhouse gases has become the new problem that sewage treatment industry need to be faced.Therefore, N in clear understanding sewage disposal process
2the crucial prerequisite that the influence factor that O produces and the mechanism of action become reduction of greenhouse gas discharge.
Existing multidigit scholar discovery, the aerobic process in biological wastewater treatment process is N
2the main workshop section that O discharges, and in this process, the TN of sewage, NH
4 +-N, NO
3 --N and NO
2 --N concentration, and dissolved oxygen DO, pH and temperature all can be to N
2the generation of O exerts an influence.In Er actual sewage treatment plant, due to circumstance complication, the uncontrollability of numerous conditions, analyzes N by the investigation of actual sewage processing procedure
2the influence condition that O produces and its mechanism of production are also infeasible.Therefore, need a kind of influent quality and environmental baseline controlled, and can be to N
2o produces the experimental simulation device of implementing accurately to monitor this problem is studied.Suitable experimental simulation device not only can promote N
2o produces the understanding of condition and mechanism of production, can also improve precision and the efficiency of research.But also do not have at present a kind ofly specially for sewage aerobic biological treatment process, can reach the experimental simulation device of above-mentioned requirements.Therefore, design a kind of can on-line monitoring N
2the sewage aerobic biological treatment analogue means that O produces, to different pollutant burdens and environmental baseline in understanding sewage aerobic biological treatment process to N
2the impact that O produces and understanding N
2the mechanism of production of O is significant.
Summary of the invention
The technical matters that the present invention solves has been to provide a kind of analogue means that in sewage aerobic biological treatment process, nitrous oxide produces of monitoring, this device can be monitored the concentration of solubilised state and gaseous state nitrous oxide in sewage aerobic biological treatment simultaneously, and can simulate different running environment as dissolved oxygen DO, pH value and temperature etc., can be used for studying pollutional load and the mechanism of production of environmental baseline to nitrous oxide in sewage aerobic biological treatment process.
Technical scheme of the present invention is: the analogue means that in monitoring sewage aerobic biological treatment process, nitrous oxide produces, comprise retort and be arranged at the gland bonnet in retort, it is characterized in that: described gland bonnet is provided with injection port and gas sampling mouth, wherein injection port is used for adding sewage and active sludge, gas sampling mouth is connected with the sub-nitrogen monitoring system of gaseous oxidation, the sub-nitrogen monitoring system of this gaseous oxidation is mainly comprised of gas chromatography and connecting tube, in described retort, be provided with solubilised state nitrous oxide monitoring system, dissolved oxygen DO control system, pH control system and temperature control system, wherein solubilised state nitrous oxide monitoring system is mainly comprised of nitrous oxide electrode and nitrous oxide monitor, by the concentration of solubilised state nitrous oxide in nitrous oxide electrode on-line monitoring sewage, dissolved oxygen DO control system is mainly by dissolved oxygen control instrument, dissolved oxygen probe, air pump, gas-flow rate controller and aeration head form, by controlling air pump aeration rate, regulate the dissolved oxygen concentration of sewage in retort, pH control system is mainly by pH controller, pH electrode and soda acid storage tank form, by control, add the pH value that acid or alkali regulate sewage in retort, temperature control system is mainly by temp probe, temperature controller and well heater form, for regulating the temperature of retort sewage, be 10-40 ℃, the bottom of described retort is provided with liquid sample mouth, collection for fluid sample.
Acid in pH control system of the present invention is the hydrochloric acid of volumetric molar concentration 6-10mol/L, and alkali is the sodium hydroxide solution of volumetric molar concentration 6-10mol/L.
Retort of the present invention is designed to right cylinder, square or rectangular parallelepiped, for sewage is mixed with active sludge, is preferably right cylinder.
Method of operating of the present invention is: from injection port, add retort after mixing with fresh active sludge by actual waste water or human configuration are useless, sludge concentration maintains 2000-3000mg/L, by dissolved oxygen DO control system, pH control system and temperature control system, regulate dissolved oxygen DO, pH value and the temperature of mud mixture in retort, sewage in retort and active sludge are even by aeration agitation, respectively by solubilised state N
2o monitoring system and gaseous state N
2solubilised state N in O monitoring system monitoring sewage
2the gaseous state N of O and loss
2o concentration, in course of reaction regularly from liquid sample mouth collection liquid sample, the chemical analysis of be correlated with, the reaction time can proper extension or shortening according to actual experiment needs, is generally 2-5h.
The present invention compared with prior art has following beneficial effect: (1) passes through N
2o monitoring system precise monitoring sewage aerobic biological treatment process N
2generation feature and the generation of O, comprise solubilised state N
2o and gaseous state N
2o; (2), by dissolved oxygen DO control system, pH control system and the adjusting of temperature control system to dissolution of contaminated water oxygen, pH and temperature in retort, simulation varying environment condition is to N in sewage aerobic biological treatment process
2the impact that O produces; (3), by human configuration sewage or add pollutant in actual sewage, simulate different pollutant burdens to N in sewage aerobic biological treatment process
2the impact that O produces; (4) by N
2o electrode and gas chromatography combine with sewage aerobic biological treatment process, have greatly improved N
2the precision of O monitoring; (5) in conjunction with various control system, a plurality of influence factors are attached in a device, can realize the many condition simulations of sewage aerobic biological treatment process, effectively improve practicality and the utilization ratio of device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and Fig. 2 is the concentration curve over time of solubilised state and gaseous state nitrous oxide in the embodiment of the present invention 1, and Fig. 3 is COD, TN, NH in the embodiment of the present invention 1
4 +-N, NO
3 --N and NO
2 -the concentration of-N is curve over time, and Fig. 4 is the concentration curve over time of solubilised state and gaseous state nitrous oxide in the embodiment of the present invention 2, and Fig. 5 is COD, TN, NH in the embodiment of the present invention 2
4 +-N, NO
3 --N and NO
2 -the concentration of-N is curve over time.
Drawing explanation: 1, the sub-nitrogen monitor of liquid oxidatively, 2, gas sampling mouth, 3, pH controller, 4, soda acid storage tank, 5, injection port, 6, well heater, 7, pH electrode, 8, liquid sample mouth, 9, aeration head, 10, gas-flow rate controller, 11, air pump, 12, retort, 13, nitrous oxide electrode, 14, temp probe, 15, dissolved oxygen probe, 16, gland bonnet, 17, dissolved oxygen control instrument, 18, temperature controller, 19, gas chromatography.
Embodiment
Describe by reference to the accompanying drawings embodiment in detail.A kind of analogue means of monitoring nitrous oxide generation in sewage aerobic biological treatment process, comprise retort 12 and be arranged at the gland bonnet 16 in retort 12, described gland bonnet 16 is provided with injection port 5 and gas sampling mouth 2, wherein injection port 5 is for adding sewage and active sludge, gas sampling mouth 2 is connected with the sub-nitrogen monitoring system of gaseous oxidation, the sub-nitrogen monitoring system of this gaseous oxidation is mainly comprised of gas chromatography 19 and connecting tube, in described retort 12, be provided with solubilised state nitrous oxide monitoring system, dissolved oxygen DO control system, pH control system and temperature control system, wherein solubilised state nitrous oxide monitoring system is mainly comprised of nitrous oxide electrode 13 and nitrous oxide monitor 1, by the concentration of solubilised state nitrous oxide in nitrous oxide electrode 13 on-line monitoring sewage, dissolved oxygen DO control system is mainly by dissolved oxygen control instrument 17, dissolved oxygen probe 15, air pump 11, gas-flow rate controller 10 and aeration head 9 form, by controlling air pump 11 aeration rates, regulate the dissolved oxygen concentration of sewage in retort 12, pH control system is mainly by pH controller 3, pH electrode 7 and soda acid storage tank 4 form, by control, add the pH value that acid or alkali regulate sewage in retort 12, temperature control system is mainly by temp probe 14, temperature controller 18 and well heater 6 form, for regulating the temperature of retort 12 sewage, be 10-40 ℃, the bottom of described retort 12 is provided with liquid sample mouth 8, collection for fluid sample.Acid in described pH control system is the hydrochloric acid of volumetric molar concentration 6-10mol/L, and alkali is the sodium hydroxide solution of volumetric molar concentration 6-10mol/L.Described retort 12 is designed to right cylinder, square or rectangular parallelepiped, for sewage is mixed with active sludge, is preferably right cylinder.
Embodiment 1
Real life sewage and fresh active sludge intermixture (sludge concentration 3000mg/L) are joined in retort by injection port, and sewage quality is: COD 71mg/L, NH
4 +-N 35.2mg/L, NO
3 --N 3.3mg/L and NO
2 --N 0.3mg/L, liquid level is apart from gland bonnet 5cm, close injection port, in dissolved oxygen DO control system, pH control system and temperature control system, setting respectively the required dissolved oxygen DO of course of reaction is 2.0mg/L, pH=7.5, temperature is 25 ℃, opens air pump and starts reaction, reaction time is 4.5h, by solubilised state N
2o monitoring system and gaseous state N
2o monitoring system is monitored simultaneously and is dissolved in sewage neutralization and spills into airborne N
2o concentration change, by calculating N
2it is 0.35mg that O produces total amount, and interval 30min gets fluid sample from liquid sample mouth, carries out chemical analysis (COD, TN, NH
4 +-N, NO
3 --N and NO
2 --N etc.), obtain the variation of pollutant in sewage aerobic biological treatment process.To N in result
2in the variation of O generation and sewage, pollutant levels change and carry out correlation analysis, the results are shown in accompanying drawing 2 and accompanying drawing 3.
Embodiment 2
Sanitary sewage and fresh active sludge intermixture (sludge concentration 3000mg/L) are joined in retort by injection port, and sewage quality is: COD 59mg/L, NH
4 +-N 35.3mg/L, NO
3 --N 0.5mg/L and NO
2 --N 0.2mg/L, liquid level is apart from gland bonnet 5-10cm, close injection port, in dissolved oxygen DO control system, pH control system and temperature control system, setting respectively the required dissolved oxygen DO of course of reaction is 2.0mg/L, pH=6.5, temperature is 25 ℃, opens air pump and starts reaction, reaction time is 5h, by solubilised state N
2o monitoring system and gaseous state N
2o monitoring system is monitored simultaneously and is dissolved in sewage neutralization and spills into airborne N
2o concentration change, by calculating N
2it is 1.12mg that O produces total amount, and interval 30min gets fluid sample from liquid sample mouth, carries out chemical analysis (COD, TN, NH
4 +-N, NO
3 --N and NO
2 --N etc.), obtain the variation of pollutant in sewage aerobic biological treatment process, to N in result
2in the variation of O generation and sewage, pollutant levels change and carry out correlation analysis, the results are shown in accompanying drawing 4 and accompanying drawing 5.
More than show and described ultimate principle of the present invention, principal character and advantage, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present invention.
Claims (3)
1. the analogue means that in monitoring sewage aerobic biological treatment process, nitrous oxide produces, comprise retort and be arranged at the gland bonnet in retort, it is characterized in that: described gland bonnet is provided with injection port and gas sampling mouth, wherein injection port is used for adding sewage and active sludge, gas sampling mouth is connected with the sub-nitrogen monitoring system of gaseous oxidation, the sub-nitrogen monitoring system of this gaseous oxidation is mainly comprised of gas chromatography and connecting tube, in described retort, be provided with solubilised state nitrous oxide monitoring system, dissolved oxygen DO control system, pH control system and temperature control system, wherein solubilised state nitrous oxide monitoring system is mainly comprised of nitrous oxide electrode and nitrous oxide monitor, by the concentration of solubilised state nitrous oxide in nitrous oxide electrode on-line monitoring sewage, dissolved oxygen DO control system is mainly by dissolved oxygen control instrument, dissolved oxygen probe, air pump, gas-flow rate controller and aeration head form, by controlling air pump aeration rate, regulate the dissolved oxygen concentration of sewage in retort, pH control system is mainly by pH controller, pH electrode and soda acid storage tank form, by control, add the pH value that acid or alkali regulate sewage in retort, temperature control system is mainly by temp probe, temperature controller and well heater form, for regulating the temperature of retort sewage, be 10-40 ℃, the bottom of described retort is provided with liquid sample mouth, collection for fluid sample.
2. the analogue means that in monitoring sewage aerobic biological treatment process according to claim 1, nitrous oxide produces, it is characterized in that: the acid in described pH control system is the hydrochloric acid of volumetric molar concentration 6-10mol/L, alkali is the sodium hydroxide solution of volumetric molar concentration 6-10mol/L.
3. the analogue means that in monitoring sewage aerobic biological treatment process according to claim 1, nitrous oxide produces, is characterized in that: described retort is designed to right cylinder, square or rectangular parallelepiped.
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|---|---|---|---|
| CN201410216487.7A CN104007235B (en) | 2014-05-22 | 2014-05-22 | The analogue means that nitrous oxide is produced in monitoring sewage aerobic biological treatment process |
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| CN104007235B CN104007235B (en) | 2017-05-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761042A (en) * | 2018-07-23 | 2018-11-06 | 三峡大学 | A kind of research device and method of sediment concentration and greenhouse gases relationship |
| CN109374416A (en) * | 2018-09-20 | 2019-02-22 | 大连理工大学 | A kind of pressure vessel blasting test system and method for liquid oxygen environment |
| CN110787598A (en) * | 2019-07-05 | 2020-02-14 | 宁夏百益科创新能源科技有限公司 | Waste gas treatment device with organic pollutant degradation function |
| CN113281480A (en) * | 2021-05-13 | 2021-08-20 | 吴迅海 | Device for measuring carbon emission of sewage and statistical method for carbon emission of sewage |
| TWI750735B (en) * | 2020-07-15 | 2021-12-21 | 康淳科技股份有限公司 | Biological nitrogen removal system for nitrogen-containing wastewater and nitrogen removal method |
| CN115165994A (en) * | 2022-08-01 | 2022-10-11 | 天津大学 | Device and method for measuring nitrous oxide emission of sewage treatment plant |
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| JPS54103254A (en) * | 1978-02-01 | 1979-08-14 | Hitachi Chem Co Ltd | Method of treating sugar containing waste water |
| CN201226000Y (en) * | 2008-06-27 | 2009-04-22 | 北京工业大学 | Equipment for generating N2O for researching sewerage denitrification process |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
| CN203319768U (en) * | 2013-01-31 | 2013-12-04 | 北京工业大学 | Process control-based device for collecting N2O gas in SBR (Sequencing Batch Reactor) reaction process |
| CN203894242U (en) * | 2014-04-22 | 2014-10-22 | 沈阳计量测试院 | Metrological verification standard device of detector for alcohol content in exhaled gas |
-
2014
- 2014-05-22 CN CN201410216487.7A patent/CN104007235B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54103254A (en) * | 1978-02-01 | 1979-08-14 | Hitachi Chem Co Ltd | Method of treating sugar containing waste water |
| CN201226000Y (en) * | 2008-06-27 | 2009-04-22 | 北京工业大学 | Equipment for generating N2O for researching sewerage denitrification process |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
| CN203319768U (en) * | 2013-01-31 | 2013-12-04 | 北京工业大学 | Process control-based device for collecting N2O gas in SBR (Sequencing Batch Reactor) reaction process |
| CN203894242U (en) * | 2014-04-22 | 2014-10-22 | 沈阳计量测试院 | Metrological verification standard device of detector for alcohol content in exhaled gas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761042A (en) * | 2018-07-23 | 2018-11-06 | 三峡大学 | A kind of research device and method of sediment concentration and greenhouse gases relationship |
| CN109374416A (en) * | 2018-09-20 | 2019-02-22 | 大连理工大学 | A kind of pressure vessel blasting test system and method for liquid oxygen environment |
| CN110787598A (en) * | 2019-07-05 | 2020-02-14 | 宁夏百益科创新能源科技有限公司 | Waste gas treatment device with organic pollutant degradation function |
| TWI750735B (en) * | 2020-07-15 | 2021-12-21 | 康淳科技股份有限公司 | Biological nitrogen removal system for nitrogen-containing wastewater and nitrogen removal method |
| CN113281480A (en) * | 2021-05-13 | 2021-08-20 | 吴迅海 | Device for measuring carbon emission of sewage and statistical method for carbon emission of sewage |
| CN115165994A (en) * | 2022-08-01 | 2022-10-11 | 天津大学 | Device and method for measuring nitrous oxide emission of sewage treatment plant |
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| CN104007235B (en) | 2017-05-31 |
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