30 Water / Wastewater


Water Quality Platform with Smartphone Interface


Spectral UV Sensors for Industrial Waste Water Applications


Continuous or online effluent monitoring is becoming more and more important in Vietnam. The Vietnamese Decree 38/2015/ND-CP requires that every industrial zone or factory located outside of an industrial zone with an effluent volume of more than 1000 m3/day has to monitor continuously the three mandatory parameters COD, TSS and pH at the effluent of the waste water treatment plant.


In Europe in the early 2000 years online spectral UV-VIS sensors were developed by Xylem measuring full absorption spectra in the wave length range of 200- 720 nm. These sensors are using calculation algorithms based on multivariate methods for measurements of COD, nitrate and nitrite, in the influent, the biological tank as well as in the effluent of municipal waste water treatment plants.


These types of spectral sensors helped to reduce initial investment costs as well as maintenance efforts to a minimum compared to wet-chemistry analysers. Additionally they showed more accurate results and better correlations to lab standard COD measurements compared to single wave length based sensors, also under changing matrix conditions of the sample.


The Aqua TROLL 600 Multiparameter Sonde, from In-Situ (UK), is the newest advancement in state-of-the-art water monitoring technology. Rugged in groundwater and corrosion-resistant in surface water, it delivers accurate data in an easy-to-use, customisable instrument.


Internal data logging, 9+ months battery life, drift-resistant sensors, and active and passive antifouling systems ensure years of performance. Internal Bluetooth connection and the VuSitu Mobile App for Android combine industry-leading water quality sensors with revolutionary smartphone mobility, eliminating the need for bulky handheld meters. Simply connect the Sonde to the power pack, launch the mobile app, and start reading results. The app guides you through spot checks, calibrations, and data management, and real-time results can be emailed from the field, logged to a smartphone, or exported on the spot.


VuSitu also makes low-flow groundwater sampling events fast, mobile, and efficient. Use a smartphone or tablet and the app-based controls to automate the collection of well and pumping information, monitor and record the stabilisation of key water quality parameters, and automatically generate calibration and sampling reports to conform to regulations requirements.


VuSitu also accommodates multiple languages by automatically picking up the preferred language settings of the mobile device for English, Spanish, Japanese, Korean, Simplified Chinese, French, German, Italian, and Dutch.


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Two continuously measuring spectral UV-VIS sensors were tested for one month at the effluent channels of two typical Vietnamese industrial zones. Readings of the sensors were compared with the laboratory COD standard test method SMEWW 5220.C:2012 and showed accuracies of ±10% or ±5 mg/l (whichever is higher) after performing a site specific two point user calibration. This study demonstrates that spectral sensors with calculation algorithms originally designed for municipal waste water could be successfully used for two typical Vietnamese industrial waste water applications and … contact us for more.


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Multilevel Groundwater Monitoring System


The Solinst CMT® Multilevel System monitors multiple depth- discrete groundwater zones within a single borehole. The System is available with either 3 or 7 channels, with monitoring ports easily constructed at different depths in each channel. The 3-Channel CMT is ideal for direct push installations. Both CMT Systems are inexpensive and easy to install, design flexibility allows port locations and monitoring strategy to be finalised right on site.


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Severn Trent Supplied with Wastewater Monitoring Systems


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in our element


The UK’s leading manufacturer of hydrographic and


oceanographic instrumentation Gauges Tide Telemetry


Optical Sensors


Multi-utility monitoring and telemetry specialist HWM, in partnership with field services expert Enviromontel, has won a contract to supply, install and maintain fixed-point sewer network monitoring equipment for Severn Trent (ST).


In what is thought to be the largest project of its kind, ST is targeting better monitoring of its wastewater networks in order to improve performance and customer service, as well as reduce flooding and pollution incidents.


Following a rigorous evaluation process, ST decided that HWM offered the greatest overall value and was best able to help ST achieve its strategic objectives. HWM is due to provide three separate products over a five-year period, all based on the company’s new Intelligens data logger: 700 Intelligens Flow monitoring systems, capable of recording


parameters such as velocity and depth, 3,000 Intelligens WW and SonicSens ultrasonic sensors, used to record the level of flow, and 1,130 Intelligens Flood Alarm systems, which register that the level in the sewer has risen beyond an acceptable height and transmit an alarm.


Recorders Wave Multiparameter CTD &


Current Meters


The intrinsically-safe (ATEX Zone 0) Intelligens is housed in a rugged IP68 enclosure and fitted with a GPRS modem for remote monitoring and reprogramming. The unit’s advanced power management allows for over five years’ data collection and transmission under standard operating conditions. An alarm regime can be configured for each channel and threshold conditions set to trigger faster logging and accelerated data transmission during alarm conditions.


Engineering Ocean


Echo Sounders & Bathymetry


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Sound Velocity


Tel: +44 (0) 1803 869292 l sales@valeport.co.uk


St Peter’s Quay l Totnes l Devon l TQ9 5EW l United Kingdom www.valeport.co.uk


7673ad@reply-direct.com AET Annual Buyers Guide 2017 www.envirotech-online.com


The data logger and associated interfaces are compatible with a variety of sensors including Doppler-effect velocity, hydrostatic depth, ultrasonic level, radar level and digital inputs from rain gauges or float alarms. This allows HMW to offer complete monitoring systems suitable for permanent or temporary flow surveys, level monitoring or flood level alarm. Typical applications for the equipment include foul, combined and storm water sewers, as well as adopted private sewer monitoring, but it can also be used for open channel or outflow monitoring.


The benefits of long-term monitoring in wastewater networks include a reduction in both the frequency and impact of pollution events. Permanent installation of remote monitoring equipment helps to alert network operators to immediate problem sites. It also improves understanding of network performance and delivers data to assist with the development and testing of advanced network models.


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