scholarly journals In situ continuous monitoring of nitrogen with ion-selective electrodes in a constructed wetland receiving treated wastewater: an operating protocol to obtain reliable data

2018 ◽  
pp. wst2018889
Author(s):  
Sandrine Papias ◽  
Matthieu Masson ◽  
Sébastien Pelletant ◽  
Stéphanie Prost-Boucle ◽  
Catherine Boutin
Keyword(s):  
Constructed Wetland ◽  
Continuous Monitoring ◽  
Reliable Data ◽  
Treated Wastewater ◽  
Ion Selective Electrodes

scholarly journals In situ continuous monitoring of nitrogen with ion-selective electrodes in a constructed wetland receiving treated wastewater: an operating protocol to obtain reliable data

2018 ◽  
Vol 77 (6) ◽  
pp. 1706-1713 ◽  
Author(s):  
Sandrine Papias ◽  
Matthieu Masson ◽  
Sébastien Pelletant ◽  
Stéphanie Prost-Boucle ◽  
Catherine Boutin
Keyword(s):  
Continuous Monitoring ◽  
Wastewater Treatment Plants ◽  
Treated Wastewater ◽  
Ion Selective Electrodes ◽  
Calibration Data ◽  
Effluent Quality ◽  
Evaluation Of Performance ◽  
Real Performance

Abstract Constructed wetlands receiving treated wastewater (CWtw) are placed between wastewater treatment plants and receiving water bodies, under the perception that they increase water quality. A better understanding of the CWtw functioning is required to evaluate their real performance. To achieve this, in situ continuous monitoring of nitrate and ammonium concentrations with ion-selective electrodes (ISEs) can provide valuable information. However, this measurement needs precautions to be taken to produce good data quality, especially in areas with high effluent quality requirements. In order to study the functioning of a CWtw instrumented with six ISE probes, we have developed an appropriate methodology for probe management and data processing. It is based on an evaluation of performance in the laboratory and an adapted field protocol for calibration, data treatment and validation. The result is an operating protocol concerning an acceptable cleaning frequency of 2 weeks, a complementary calibration using CWtw water, a drift evaluation and the determination of limits of quantification (1 mgN/L for ammonium and 0.5 mgN/L for nitrate). An example of a 9-month validated dataset confirms that it is fundamental to include the technical limitations of the measuring equipment and set appropriate maintenance and calibration methodologies in order to ensure an accurate interpretation of data.

scholarly journals In Situ Recalibration of Ion Selective Electrodes

2022 ◽  
Author(s):  
Neel Sisodia ◽  
Kay McGuinness ◽  
Jay Deep Wadhawan ◽  
Nathan S Lawrence
Keyword(s):  
Reference Electrode ◽  
Ion Selective Electrodes ◽  
Ph Sensors ◽  
Electrode Chamber

Reference electrode drift resulting from the exchange of ions at the solution/reference electrode chamber interface is the number one reason why ion selective electrodes and pH sensors in particular require...

Importance of Continuous Monitoring: Case Study of Shallow CO2 Injection at the CSIRO in-situ Laboratory Site

2020 ◽  
Author(s):  
K. Tertyshnikov ◽  
L. Ricard ◽  
K. Michael ◽  
A. Avijegon ◽  
R. Pevzner
Keyword(s):  
Continuous Monitoring ◽  
Co2 Injection

Estimating nitrate retention in a large constructed wetland using high-frequency, continuous monitoring and hydrologic modeling

2017 ◽  
Author(s):  
Chad W Drake ◽  
Christopher S Jones ◽  
Keith E Schilling ◽  
Antonio Arenas Amado ◽  
Larry J Weber
Keyword(s):  
Constructed Wetland ◽  
High Frequency ◽  
Continuous Monitoring ◽  
Hydrologic Modeling ◽  
Nitrate Retention

In situ UV monitoring of wastewater: a response to sample aging

2004 ◽  
Vol 49 (1) ◽  
pp. 47-52 ◽  
Author(s):  
E. Baurès ◽  
C. Berho ◽  
M.-F. Pouet ◽  
O. Thomas
Keyword(s):  
Low Temperature ◽  
Process Control ◽  
Treated Wastewater ◽  
Wastewater Sample ◽  
Line Measurement ◽  
Regulation Compliance

The phenomenon of wastewater sample aging is supposed to be treated with a low temperature autosampler. This work presents two examples of treated wastewater, the quality of which varies with the time of conservation. This evolution may pose some problems with respect to regulation compliance or process control. After the explanation of the mechanisms involved in sample aging, some recommendations are proposed in order to improve the UV off-line measurement of TSS and COD of treated wastewater.

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