Justification of the Winter Temperature Regime of Water Hyacinth Content for Urban Wastewater Treatment

Therefore, it determined an urgent need of reducing water pollution in urban wastewater facilities. The analysis of efficiency of domestic wastewater treatment in Shakhty of the Rostov region is given in the article. The negative impact of discharging treated domestic and groundwater into small rivers of the region is determined. The perspectives of additional treatment by means of higher aquatic plants (HAPs) are stated. The possibility of using water hyacinth as additional water purification is being considered. Taken into account the weather conditions which are unfavorable for Eichhornia, its vegetation period was described, which can reach up to 200 days. Based on the analysis of wastewater temperature measurements in municipal and mine wastewater treatment plants, favorable conditions for modeling of the water hyacinth in laboratory conditions were determined. While modeling conditions close to the water temperature in ponds of mine treatment plants, the conditions for survival of Eichhornia during the unfavorable winter time were determined. The most favorable temperature range for long-term storage of water hyacinth has been obtained allowing reducing the period of plants adaptation to natural conditions and active vegetation. Possible options of technical solutions for providing necessary conditions for preserving the thermophilic plant at low temperatures are determined. Among five wastewater treatment plants located in the town, the only one settling pond located at the Glubokaya mine can provide favorable temperature conditions for long-term storage of water hyacinth seedlings in winter. This will significantly increase the period of high-quality additional treatment of household wastewater.