Waste water from hotel-restaurant complex as a potential threat to biodiversity of aquatic ecosystems (p.)

Abstract

Analysis of hotel-restaurant complex wastewater was studied on the example of chemical composition of wastewaterJSC“Hotel“Lybed”” situated inKievduring 2007–2009. We determined the following parameters: dry residue content of suspended solids, sulfates, chlorides, phosphates, ammonia nitrogen, total iron, fat, anionic surfactants (devi) and chemical oxygen demand (COD) and pH water (pH).Indicators of pollutants in wastewater discharged to the collectors of restaurant and household use does not exceed the corresponding MAC approved in Acceptance wastewater sewer system companies in Kyiv. The dry residue in household water were in the range of 567–596 mg/m3, restaurant – 551–637 mg/m3. Number of suspended solids was not lower than 150 mg/m3. Indexes of the content of sulfates and chlorides in the hotel-restaurant complex’ return water was below their MCL. Wastewater both household and restaurant include a significant amount of ammonia nitrogen, phosphates and organic substances. COD index that characterizes the content of organic matter in the water was 1,9 times below the MAC, but 15 times higher than in highly polluted natural waters. Anionic surfactant content in restaurant and household wastewater dumped into municipal sewer does not exceed 5 dm3, and fat – 27 dm3.Dependence of chemical parameters on the amount of drainage water for months found no clear dependence.Devi, soluble forms of nitrogen and phosphorus, organic matter most polluting freshwater ecosystems. They change the surface tension, reduce the content of dissolved oxygen, causing algal blooms, foaming and increase turbidity, lead to pH changes and salt content, adversely affect the livelihoods of aquatic organisms.To prevent contamination of aquatic ecosystems by hotels and restaurants drains it is required to clean up wastewater before they getting to the central sewage drain/ It is necessary to install new sewer autonomous, self-contained sewage treatment plant (eg, grease, mesh filters, etc.) or use biological products.