摘要：

渗滤液浓缩液是一种高盐、高有机物含量和具有难降解特性的废水，其处理难度极大，已成为渗滤液处理中的一道难题。结合热泵技术和增湿去湿（HDH）技术的优点，提出一种基于热泵耦合HDH的渗滤液浓缩液处理新方法，并进行中试研究，旨在验证其在实际应用中的可行性和优缺点。试验结果表明，热泵耦合HDH技术对渗滤液浓缩液的处理效果显著。在处理过程中，脱盐率、有机物去除率和酸性条件下的氨氮去除率分别达到99.5%、98.2%和67.8%，处理后产水水质能够满足回用和排放标准，同时，原水浓缩倍率达到20，减量化效果明显。技术经济分析表明，热泵耦合HDH技术投资为8.76万元/t，运行成本为54.47元/t，与其他蒸发技术相比，具有节省投资及运行成本的优势。

关键词: 渗滤液浓缩液, 增湿去湿, 蒸发, 脱盐率, 热泵

Abstract:

Concentrated leachate is a type of wastewater with high salt content, high organic matter content, and difficult degradation characteristics. Its treatment is extremely difficult and has become a difficult problem in leachate treatment. This article combined the advantages of heat pump technology and humidification-dehumidification(HDH) technology to propose a new method for treating concentrated leachate based on heat pump coupled HDH technology. A pilot study was conducted to verify its feasibility and advantages and disadvantages in practical applications. The experimental results showed that the heat pump coupled with HDH technology had a significant effect on the treatment of concentrated leachate. During the treatment process, the desalination rate, organic matter removal rate, and ammonia-nitrogen removal rate under acidic conditions reached 99.5%, 98.2%, and 67.8%, respectively. The treated condensate water quality could meet the standards for reuse and discharge. At the same time, the concentration rate of the raw water reached 20 times, indicating a significant reduction effect. Economic analysis showed that, the investment of heat pump coupled HDH technology was 87 600 yuan/t, and the operating cost was 54.47 yuan/t. Compared with other evaporation technologies, it had the advantage of saving investment and operating costs.

Key words: concentrated leachate, moisturizing and dehumidifying, evaporation, desalination rate, heat pump

中图分类号: 

• X7