LIXiang-dong,CHENFang-fang,YAOPeng,et al.Treatment of Landfill Leachate Membrane Concentrate via Low Temperature Evaporation Technology[J].China Water & Wastewater,2025,41(3):84-88.
Treatment of Landfill Leachate Membrane Concentrate via Low Temperature Evaporation Technology
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第3期
Page:
84-88
Column:
Date of publication:
2025-02-01
- Abstract:
- Low temperature evaporation technology was employed to decrease the concentration of reverse osmosis (RO) concentrate from the leachate of a garbage incineration plant. This study examined the operational stability, reduction efficiency, pollutants removal performance, and comprehensive operating cost of the system. Additionally, it evaluated the environmental impact of the RO concentrate after treatment and investigated pollution control measures for the heat exchanger. By employing this technology, the average concentration ratio could be doubled. The low temperature evaporation system operated stably, with the average conductivity of the produced water being less than 26 μS/cm. The desalination rate reached as high as 99.9%, while the average COD of the produced water was below 20 mg/L and the average Cl- concentration was less than 7 mg/L. Additionally, the pH remained near neutral. The overall water quality significantly surpassed the limits outlined in The Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses (GB/T 19923-2005). The system utilized waste heat from the garbage incineration plant as a heat source. Without accounting for the cost of this heat source, the comprehensive operating cost was 14.88 yuan/m3. The system’s heat exchanger was the main pollutant site, and the pollution rate of the heat exchanger exhibited a positive correlation with the concentration ratio. The primary pollutants consisted of organic compounds. This pollution rate could be effectively managed through online chemical cleaning and by adjusting the concentration ratio.
Last Update:
2025-02-01