Landfill leachate concentrated solution resource utilization system and method

• Main Authors: GUO MINYING, LI JUNFENG, XIE YONGXIN, HUANG MUKAI, HE SHIXING, XIA WENJING, LIU CHENG, WANG XIAOYAN, HUANG LIYUE, CHEN RISHENG, HE YUPING, LI RUIJING, LIN XINLEI, ZHOU WENDONG
• Format: Patent
• Language: Chinese; English
• Published: 19.06.2020
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a landfill leachate concentrated solution resource utilization system and method. The resource utilization system comprises a concentrated solution softening system, an electrodialysis system, an MAP sedimentation tank and an inorganic salt evaporation concentration system which are sequentially communicated, and the electrodialysis system is also connected with a humic acid adsorption system. According to the landfill leachate concentrated solution resource utilization system, the two-stage electrodialysis system is adopted for effectively separating humic acid organic matter from inorganic salt, the inorganic salt separation effect is effectively improved, meanwhile, the processes of intermittence/circulation, backflow and the like can be omitted, and the processis simplified; the softening system is added to reduce the hardness of a concentrated solution, avoid pollution to an electrodialysis system membrane, prolong the service life of the membrane and reduce the maintenance cost