Removal of Chloride, Sulphate, TOC and COD from Aqueous Solution by Vacuum Distillation
3rd International Conference on Recycling and Reuse, İstanbul, Turkey, 28 - 30 September 2016, vol.1, no.1, pp.242-243, (Full Text)
- Publication Type: Conference Paper / Full Text
- Volume: 1
- City: İstanbul
- Country: Turkey
- Page Numbers: pp.242-243
- Istanbul University Affiliated: Yes
Abstract
Recycling of effective methods that used in domestic and industrial wastewater treatment systems shows that acceptable values of reuse water can be achieved. Concentrated contaminate wastewaters have some treatment disadvantages by conventional treatment systems. In these conditions, wastewater can be treated and recycling by advanced treatment methods. For this purpose, membrane systems usually preferred and other processes couldn’t evaluate enough. Highly concentrated brain water problem makes membrane systems unfavourable. Vacuum evaporation systems used for spring water from seawater and economically has some disadvantages. However, a distillate from an evaporation system can be used in system and effectively economically.
In this study, usage of vacuum evaporation systems in environmental engineering was investigated as alternatives and application conditions by treating different characteristics of wastewater. In the first study, by the aim of testing performance of system, removal of chloride and sulphate from seawater was investigated and conductivity in distillate determined. Seawater tests were carried under 0.7 bar vacuum, at 600 C temperature, in 2 hours and conductivity of distillate was reduced 99.9% ratio. Also removal ratios of chloride and sulphate parameters were calculated as 99.7% and 99.6%, respectively.
In another study, chloride and sulphate parameters were both removed 99.3% ratio, whereas conductivity reduced by 99.5%, which was carried with sea water under 0.6 bar vacuum, 600 C temperature, in 2 hours.
By the aim of testing low temperatures, seawater evaporated under 0.7 bar vacuum at 500 C temperature and conductivity was reduced 99.4% ratio. Chloride and sulphate parameters were both removed 99.1% ratio. Ongoing studies were carried with textile wastewater, which is treated by advanced methods because of the colour parameter problem. Textile wastewater evaporation was carried under 0.7 bar vacuum at 500 C temperature and in the first 30 minutes 2% of sample distilled and 92% of TOC were removed. At the end of tests, 97% of removal capacity has been reached.