Success stories

With our own investment into development and fulfilment of desires of our customers, we have developed a number of products with integrated electronics applicable in various areas.

The research part of our activities has been strengthened in 2013 with the establishment of research group registered with the Slovenian Research Agency. Recently, intensive research activities are taking place on the degradation of pharmaceuticals and other complex persistent compounds in water by means of advanced oxidation processes, where we use electrolytic cells equipped with a variety of electrodes, among which the boron doped diamond anode (BDDA) is the most advanced one.

In 2013 , we have started with the LIFE ENVIRONMENT project entitled Innovative technology for cyanobacterial bloom control . The project will enable us to demonstrate our technology for early detection of occurrence of cyanobacteria andother phytoplankton organisms in the aquatic environment and prevention of their excessive growth, also called blooming. More about the project can be found on LIFE Stop CyanoBloom web site.

  • Portable device with a set of adjustable probes for detection of physical, chemical and biological parameters in water bodies.

    The innovation is in the detection and interpretation of chlorophyll and phycocyanin enabling evaluation of the state of cyanobacteria and other phytoplankton populations in the water body

  • In many lakes and constructed water bodies, we face with eutrophic state or increased value of plant nutrients. The negative consequence of this situation is excessive occurrence of algae and blooms of cyanobacteria, which may be accompanied by the release of cyanotoxins.

    In Arhel, we are introducing to the market a new system that allows early detection and control of the growth of cyanobacteria without the use of dangerous chemicals.

    Modular vessel enables the installation of various equipment, such as probes, data loggers and transmitters, depth adjustable water sampler, solar panels and electrolytic water treatment system. Autonomous navigation of the vessel enables continuous temporal and spatial information of water status, as well as early detection and growth control of cyanobacteria. Transfer of data in real-time and report of malfunctions is performed through GSM-network to the remote monitoring centre.

    Unlike the conventional water sampling and laboratory analysis of samples, a mobile device enables us to obtain a comprehensive spatial and temporal picture of the state of phytoplankton in the water body.

    More details can be found on the pages of the LIFE Stop CyanoBloom project.

  • Today, there are several wastewater treatment systems available on the market. Biological treatment systems are the most common for biodegradable wastewater treatment, which rely on microorganisms and their aerobic or anaerobic mineralization of organic substances. However, complex persistent organic substances, such as pharmaceutical residues, pesticides, herbicides and other xenobiotic or artificially synthesized compounds in sewage, represent a major problem in such systems, since biological activity of microorganism is not sufficient for their degradation. Complex organic compounds can be also found in the effluents from industries, such as textile industry, in leachate from landfill sites, etc. Their presence in water can be dangerous already in a very low concentration, since they can act as endocrine disruptors or are toxic to organisms. In such a cases, advanced oxidation processes are necessary.

    In Arhel, we introduce the use of electrolytic cells with the application of different electrodes, depending on the type and concentration of pollutants as well as the amount of wastewater. The technology enables a modular layout that can be adapted to the volume and load of wastewater as well as the purpose of the further water use after cleaning. The system can operate as a standalone unit for cleaning or as a complementary tertiary water treatment system.

  • The lack of clean drinking water is one of today’s most pressing problems. Existing systems often do not reach the removal of emerging micro-pollutants. For this reason, recent development is focused into new, technologically advanced water treatment systems.

    In Arhel, we introduce in this field efficient and nature-friendly systems for improvement of drinking water with the use of advanced electrolytic methods based on the use of boron doped diamond electrodes (BDDs). They are chemically inert and do not form by-products.

    The new products are being introduced in the field of:

    • Preparation of drinking water in boats (capture and treatment of lake water)
    • Preparation of drinking water from rain water (system fixed under kitchen counter in households)
    • Energy-independent system for the improvement of livestock drinking water from natural water sources
    • System for the water treatment in natural swimming pools, which reduces the need for the use of disinfectants
  • Heavily contaminated soil with metals or organic materials can be treated with so-called soil washing methods. In doing so, ligands such as EDTA are being used, which bind metals and organic compounds from the soil. A large quantity of wastewater, which is produced during the process, needs to be separated from soil particles and cleaned.

    Arhel has invented for the Envit company, which uses a soil-washing technique, several solutions from the field of electronics and electrochemistry. For the final separation of water and soil particles, Arhel has produced microcomputer control system for the separation centrifuge, which allows specific settings of separation. Wastewater is treated in Arhel`s treatment plant with electrolytic cells for which a specially adapted computer-controlled adjustable 375 A current source power supply has been developed.

  • End-over-end rotator with water bath and precise temperature control MPB 1500s.

    The end-over-end rotator is suitable to carry out the in vitro extraction of biologically available metals from the soil samples and other soil matrices.

    The operation of the device is harmonised with the following procedures:

    • UBM BARGE (Unified Bioaccessibility Method of the Bioaccessibility Research Group of Europe)
    • U.S. EPA 9200.2-86 – Standard Operating Procedure for an In Vitro Bioaccessibility Assay for Lead and Soil
    • U.S. EPA TCLP – Toxicity Characteristic Leaching Procedure, etc.

    The problem of soils contaminated with metals is their mobility and bioavailability to organisms. For their detection, laboratories use different extraction procedures, which are time-consuming with high water and energy consumption. For the assessment of health risks of contaminated soil, uniform standrds and tests are needed.

    Arhel has developed End-over-end rotator MPB 1500 for in vitro extraction of biologically available metals from soils, based on the most commonly used standards . The device can be used for any other extraction and incubation procedures.

    The main advantage of the device is that it does not require a working environment with a constant flow of water and can therefore be placed anywhere in the laboratory. The device is made of high quality materials, equipped with an LCD display for the main measured parameters (temperature of the water bath, the speed of rotation, duration of the rotation).

    MPB 1500 can be upgraded according the specific needs of the user. It is possible to add simple functions like forced water-cooling, adjusting the temperature and rotation speed, adjusting the size of the bottles, as well as more advanced functions like installation of data-transfer applications for smart phones or tablet PC.

  • Adjustable computer-controlled expandble 4.5kW and 375 A power supply source
    Custom-made power supply module is designed to work with electrolytic cells for water treatment with up to 375 A and 12 V. Power supply can work in constant current mode with pre-settable maximum values of current and voltage. The system can be connected to PC for data logging.

    Infranet TNA Contact ID interface module for alarm systems communications
    Contact ID interface module converts DTMF messages received in Contact ID protocol from the alarm panels into RS232 communication protocol for TNA infranet communicator.

    Microcomputer control system for centrifugal separator LAPX 404
    System is controlling centrifugal separator valves, level switches and motor with pre-settable sequence. PC settable settings and working data logging is provided.