매립지 침출수로부터 암모니아 회수를 위한 막 증류 공정의 타당성 평가

초록

This study investigated the potential of direct contact membrane distillation (DCMD) torecover ammonia from mature landfill leachate. While previous studies has showed the applicabilityof the membrane distillation process in recovering ammonia from ammonia-rich wastewaters, such asanaerobic digestion effluent (ADE) and mature landfill leachate (MLL). However, these studies oftenlacked comprehensive water quality analyses, which are crucial for a thorough feasibility assessment. We first evaluated DCMD performance by examining the impact of feed temperature on ammonia fluxand recovery efficiency. Under specific operating conditions, the process achieved an ammonia fluxof 3.35 g/m2h and recovery efficiency of 37.9%. Water quality analysis of the product (freshwater)revealed that the DCMD process effectively removed most contaminants, including heavy metals, and ions. However, high levels of total organic carbon (TOC), total dissolved solids (TDS), and biochemicaloxygen demand (BOD) were observed in the product. In conclusion, the comprehensive water qualityresults highlighted the presence of multiple impurities as well as ammonia in the product. This studyalso discussed the limitations of using DCMD as a single process and proposes directions for futureresearch to address these challenges.

키워드