Nitrous/Ammonia Nitrogen Measuring Instrument-Global supplier

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GermanyWTW Nitrate nitrogen/Ammonia nitrogen measuring instrument (ion electrode method)VARiON^plus

Real time online continuous monitoring of nitrate concentration, suitable for monitoring nitrogen removal process

Nitrogen removal process

In the process of biochemical degradation and nitrogen removal in sewage treatment plants, in addition to dissolved oxygen, there are two important parameters that cannot be ignored, which are ammonia nitrogen and nitrate nitrogen. These three parameters are interrelated, and the adjustment of their concentration correspondence directly affects the effectiveness of sewage treatment and the power consumption of the blower. The right figure shows the corresponding relationship between the concentration changes of these three parameters in nitrification and denitrification ammonia removal processes. During the nitrification process, the blower introduces sufficient air and maintains the dissolved oxygen concentration at approximately2mg/lOn average, as the concentration of ammonia nitrogen decreases, the concentration of nitrate nitrogen increases accordingly. During the denitrification process, the blower stops working and the dissolved oxygen slowly decreases to0At this point, an anaerobic reaction is taking place, where nitrate nitrogen is gradually reduced to nitrogen gas, and the nitrogen removal process is successfully completed. At the same time, the concentration of ammonia nitrogen in the wastewater gradually increases. I used to use it often beforeORPThis parameter is used to monitor and control nitrification and denitrification processes, butORPThis parameter is not very stable and sometimes triggers false alarms, leading to premature termination of denitrification processes.

How to use online instruments to monitor nitrogen removal processes?

The composition of sewage is not fixed, which requires us to consider the actual composition of sewage, such asC:N:P(Carbon: Nitrogen: Phosphorus)Adjust the actual proportion and flexibly adjust the required aeration amount. This can not only save a lot of electricity consumption, but also ensure good purification efficiency. Previously, the vast majority of sewage treatment plants only monitored the parameter of dissolved oxygen, without considering the relationship between the concentration changes of ammonia nitrogen and nitrate nitrogen. Sometimes only considering the removal of organic carbon, without taking into account the oxygen consumption required for nitrification reactions, resulting in insufficient dissolved oxygen; Or blindly increasing dissolved oxygen concentration to remove more organic carbon, but inhibiting denitrification reaction, making nitrogen unable to be effectively removed.WTWNewly launchedVARiON^{® Plus}The nitrate/ammonia nitrogen measuring instrument can completely avoid this situation. with the help ofWTWThe high-tech nitrate/ammonia nitrogen measuring instrument allows users to monitor the entire nitrogen removal process, making it transparent and bringing huge economic benefits.

feature

· Unique combination of ammonium salt and nitrate salt sensors

· Automatically compensate for the impact of interfering ions

· On site continuous monitoring sensor technology

· Quick response, no lag time

· Automatic monitoring of biochemical treatment process

· Multi directional monitoring of nitrogen removal process throughout the entire process

· Automatic air blowing system ensures long-term reliable operation

· Very economical and practical

· No need for calibration, good long-term stability

· No reagent consumption, low investment and maintenance costs

Direct testing - direct control - cost-effective solution

Nitrification in sewage treatment/The monitoring and optimization of denitrification process have been improvedVARiON^plusAfter the nitrate/ammonia nitrogen electrode, it can become very simple:

· The nitrate/ammonia nitrogen measuring instrument is directly put into the sewage and continuously displays the current value in real-time online, without the need for sample transportation and pretreatment

· Used in conjunction with dissolved oxygen, it can monitor the nitrogen removal process from multiple perspectives throughout the entire process

· Multiple hosts can be connected simultaneously20 Support various types of sensors to monitor the entire process of sewage treatment

· inheritedIQThe advantage of the system is that it can easily replace electrodes and add testing points, saving costs

· The entire system has the characteristics of being economical, effective, and easy to maintain

System Introduction:

A complete set of nitrate/ammonia nitrogen measuring instrumentsfromIQ SENSOR NETTransmitter, sensor housing components, reference electrode, working electrodeIQComposed of cables and air cleaning components. The above-mentioned components can be replaced easily, without the need to fill electrolyte or replace thin films! Automatic cleaning passed3－7The compressed air of Ba is realized by a dedicated systemMIQ/CHVThe solenoid valve control module is used to control the air circuit switch.

During testing, simply insert the ion selective electrode of the corresponding nitrate/ammonia nitrogen measuring instrument into the corresponding socket of the sensor, and the remaining work will be automatically completed by the sensor. The instrument directly displays the correct test value, or you can choose to display the concentration value of interfering ions, such as potassium ion concentration. All test values can be obtained by simulating current0/4-20 mAOr digital interfacePROFIBUSorMODBUSTeleport toPLCIn the system.

IQ-LabLinkcorrection system

WTWHaving specific technology can ensure that the relative slope of the nitrate/ammonia nitrogen measuring instrument's ion electrode is maintained within two years95%Therefore, there is no need to frequently calibrate the electrodes. Simply immerse the entire sensor into the pool, take nearby water samples to the laboratory for analysis, and then input the laboratory results into the instrument. This completes the calibration, taking into account factors such as sample composition and background ion intensity, which can ensure excellent testing accuracy and stability. Combining with usWTWA multifunctional water quality analyzer that only requires oneUThe disk can automatically input laboratory data intoIQIn the system, it is very convenient.

· Safe, fast, and reliable data transmission

· Automatically verify the accuracy of calibration data

VARiON^{® Plus}Technical Specifications

Ionic electrode configuration	*Allow more connections1Support reference electrode2Supporting test electrodes1Interference ion compensation electrode
measurement	Ammonia nitrogen measurement	Nitrous nitrogen measurement
Ionic electrode: REFERENCE ELECTRODE working electrode Compensation electrode	VARiON^{® Plus}Ref VARiON^{® Plus}NH₄ VARiON^{® Plus}K	VARiON^{® Plus}Ref VARiON^{® Plus}NO₃orNO₃-HS VARiON^{® Plus}Cl
Test range/resolution	NH₄-N: 1…1000mg/l / 1mg/l 0.1…100mg/l / 0.1mg/l NH₄⁺: 1…1290mg/l / 1mg/l 0.1…129.0mg/l / 0.1mg/l K⁺: 1…1000mg/l / 1mg/l	NO₃-N：1…1000mg/l / 1mg/l 0.1…100mg/l / 0.1mg/l NO₃^-：5…4500mg/l / 1mg/l 0.5…450.0mg/l / 0.1mg/l Cl^-: 1…1000mg/l / 1mg/l

Temperature testing and compensation

built-inNTCTemperature probe, range:0℃…+40℃, * * degree:±0.5K，t95<20second

Correction method

Standard liquid2Point calibration or on-site actual water sample calibration(commonly used)

Surrounding conditions

Operating temperature:0℃…+40℃Storage temperature:0℃…+40℃

pHscope

pH 4 … pH 8.5

pH 4 … pH 11

accuracy

±5%Test value or±0.2 mg/lStandard liquid

working life

18month(Data obtained from testing in a sewage treatment plant environment)

Mechanical Construction

Protective cap:POM

Electrode body and temperature probe:V4Astainless steel1.4571

Electrode connector:POM，Protection level:IP 68

*Great pressure

0.2bar(includingSACIQElectrode wiring cable; After installing the electrodes)

power consumption

0.2W

size

367X40mm(Length)XDiameter, includingSACIQElectrode wiring cable

weight

about800g(No electrodes, no)SACIQElectrode wiring cable)

Ordering Information

VARiON^{® Plus}SETs	Complete supply, including reference electrode, ion electrode, and compensation electrode	Order Number
VARiON^{® Plus}A comp SET	Ammonia nitrogen testing electrode, compensated for the influence of potassium ions	107060
VARiON^{® Plus}N comp SET	Nitrous nitrogen test electrode, compensated for the influence of chloride ions	107062
VARiON^{® Plus}AN/A comp SET	Ammonia nitrogen nitrate nitrogen composite electrode, compensated for the influence of potassium ions	107066
VARiON^{® Plus}AN/A comp SETHS	Ammonia nitrogen nitrate nitrogen composite electrode, compensated for the effects of potassium and chloride ions	107065
VARiON^{® Plus}AN/N comp SET	Ammonia nitrogen nitrate nitrogen composite electrode, compensated for the influence of chloride ions	107068
attachment(automatic cleaning)		Order Number
DIQ/CHV	182Special cleaning valve control components	472007
CH	cleaning head	900107

Temperature testing and compensation	built-inNTCTemperature probe, range:0℃…+40℃, * * degree:±0.5K，t95<20second
Correction method	Standard liquid2Point calibration or on-site actual water sample calibration(commonly used)
Surrounding conditions	Operating temperature:0℃…+40℃Storage temperature:0℃…+40℃
pHscope	pH 4 … pH 8.5	pH 4 … pH 11
accuracy	±5%Test value or±0.2 mg/lStandard liquid
working life	18month(Data obtained from testing in a sewage treatment plant environment)
Mechanical Construction	Protective cap:POM Electrode body and temperature probe:V4Astainless steel1.4571 Electrode connector:POM，Protection level:IP 68
*Great pressure	0.2bar(includingSACIQElectrode wiring cable; After installing the electrodes)
power consumption	0.2W
size	367X40mm(Length)XDiameter, includingSACIQElectrode wiring cable
weight	about800g(No electrodes, no)SACIQElectrode wiring cable)