Performance of landfill leachate treatment system with disc-tube reverse osmosis units |
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Authors: | Yanping LIU Xiujin LI Baozhen WANG Shuo LIU |
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Institution: | (1) Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China;(2) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China |
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Abstract: | Reverse osmosis system with the disc-tube module (DT-RO) was applied to treat landfill leachate on full scale at the Changshengqiao
Sanitary Landfill, Chongqing City, China. In the first six-mouth operation phase, the treatment performance of DT-RO system
had been excellent and stable. The removal rate of chemical oxygen demand (COD), total organic carbon (TOC), electrical conductivity
(EC), and ammonia nitrogen (NH3-N) reached 99.2–99.7%, 99.2%, 99.6%, and over 98%, respectively. The rejection of Ca2+, Ba2+, and Mg2+ was over 99.9%, respectively. Suspended solid (SS) was not detected in product water. Effective methods had been adopted
to control membrane fouling, of which chemical cleaning is of utmost importance to guarantee the long smooth operation of
the DT-RO system. The DT-RO system is cleaned in turns with Cleaner A and Cleaner C. At present, the 1st stage cleaning cycle
by Cleaner A and Cleaner C is conducted every 100 and 500 h, respectively, depending on raw the water quality. |
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Keywords: | Disc-tube reverse osmosis (DT-RO) landfill leachate performance chemical cleaning |
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