Functional State Evaluation System with Distributed Intellect for Elderly and Disabled Persons

The main aim of this paper is to develop the system for recording and analysis of human vital signals. The decisionmaking algorithms are based on the complex system theory and distributed intellect and convolution of Mealy and Moore automata. In case of dangerous situation, a smart phone can send the alarm signal and analysis results to a physician’s server. The exceptional feature of the developed monitoring system is the synchronous analysis of multiple processes and integrated assessment of person’s functional state adaptation for user requirements at the individual level

Effect of External Carbon Source on Municipal Wastewater at Low Temperatures

eISSN 1573-2932Nitrogen removal from wastewater is usually severely inhibited under low temperatures. The wastewater enrichment using an external carbon source has the influence on the stability and efficiency of the nitrification and denitrification processes during the biological wastewater treatment. This paper reports the results of the study where the effect of temperature and addition of an external carbon source on the efficiency of wastewater treatment process were investigated. Nitrification and denitrification rates were determined in the laboratory-scale treatment system, operating under low-temperature conditions, ranging from 6 up to 15 °C. Ethanol was used as an external carbon source. The addition of ethanol resulted in the increase during the nitrification rate at lower temperature (up to 71% at 6 °C and up to 11% at 15 °C). Similar tendency was observed during the denitrification process. Denitrification rate increased up to 81% at 6 °C and up to 10% at 15 °C, respectively. Nitrification rate was slightly higher compared to the denitrification rate. Two-variablemodel equations for calculation of an external carbon amount required were based on the experimental data and in order to reach desirable process rate at particular wastewater temperature were developed. The independency from wastewater temperature and the amount of loaded carbon explicit interdependence between nitrification and denitrification rates were observedKauno technologijos universitetasVytauto Didžiojo universitetasŽemės ūkio akademij