Abstract
As a rule, the wastewater treatment system is not designed to filter substances formed, as a result of beyond design basis accident. The nature of the beyond design basis accident is associated with the shortterm appearance of a clot of these substances in wastewater, determined by the volume of the substance storage tank. Therefore, a rational approach is to divert this portion of the formed substances into a separate branch of the sewage system or sedimentation tanks. The aim of the work is to implement this approach by creating a laser monitoring system for water pollution.The article proposes a system for automatic detection of a clot of emergency discharge of pollutants into the wastewater of an industrial enterprise. The structural diagram of the system and the purpose of its main elements are given. The system should provide clot detection in real time. To ensure this function, a preliminary study is made of the spectral characteristics of all substances that may appear in wastewater in the event of an emergency.Based on these data, the wavelengths of laser radiation in the system are selected. The obtained measurement data from several probes are presented in the form of a lattice function, which is translated into a relative description representing the order relationship matrix on the set of lattice function components. The relative description is invariant to linear changes in the lattice function. The decision to detect any substance from emergency discharges is made based on a comparison of the relative description of the measurements with the standards prepared at the stage of system setup.The article provides an example of the formation of standards for emergency clots from glycerin and allyl alcohol. The graphs of the lattice functions obtained from the IR spectra of emergency discharges of these substances are given; algorithms for constructing a lattice function and comparison of lattice functions. Thus, using the developed mathematical description of the shape of digital signals based on the relative description, the signal of the monitoring curve can be described in the form of a curve of the optical density change of an aqueous medium.
Highlights
Wastewater monitoring of enterprises is carried out by periodic sampling, processing and analysis of samples in laboratories
Using the developed mathematical description of the shape of digital signals based on the relative description, the signal of the monitoring curve can be described in the form of a curve of the optical density change of an aqueous medium
The nature of the beyond design basis accident is associated with the shortterm appearance of a clot of these substances in wastewater, determined by the volume of the storage capacity of the substances
Summary
Wastewater monitoring of enterprises is carried out by periodic sampling, processing and analysis of samples in laboratories. Laboratory instruments for sample analysis have several disadvantages: – lack of measurement continuity; – time delay associated with sample delivery, measurement and data processing; – the possibility of losing the properties of the investigated material in the samples; – the inability to automate the full monitoring cycle. The known devices and complexes have high accuracy and the ability to measure many parameters of aqueous media, such as equipment of the German company Hach [3], they do not allow real-time detection of emergency discharge of pollutants and prevent its entry into the system sewage enterprise. Optical spectroscopy eliminates the above disadvantages, which makes it possible to create complexes of continuous measurement in real time and to automate monitoring of environmental studies. The aim of the work was to implement this approach by creating a laser monitoring system for water pollution
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