Department of Environmental Engineering, Istanbul Technical University, Ayazaga, 34469 Istanbul, Turkey.
Water Sci Technol. 2009;60(10):2515-20. doi: 10.2166/wst.2009.614.
Collection of wastewater in segregated streams is one of the new concepts in domestic wastewater management. One such stream is yellow water which is mainly human urine. Direct use of this richest fraction in terms of nutrients on plants as fertilizer is one of the recommendations as the final end use. Indirect use of urine as fertilizer may also be exercised after various modes of processing. One of those is processing with clinoptilolite to transfer plant nutrients onto the zeolite and then to recover them subsequently. One of the significant factors in this process is the initial nutrient loading with which clinoptilolite is charged. This paper aims to investigate the transfer of ammonium and potassium from source-separated urine onto clinoptilolite, concentrating upon surface concentrations attained and removal efficiencies under various initial ammonium loadings. The results have indicated that variations in initial loading have no significant effect in terms of removal efficiencies up to 10 mg NH(4) (+)/g clinoptilolite. Highly acceptable efficiencies could be attained up to 15 mg NH(4) (+)/g clinoptilolite after which the efficiency goes down as initial loading is increased. Overall, increased initial loadings result in higher final surface concentrations but decreased removal efficiencies.
分质收集污水是生活污水管理中的新概念之一。其中一种污水是黄水，主要是人类尿液。将这种最富营养的部分直接作为肥料施用于植物是推荐的最终用途之一。尿液也可以经过各种处理方式后间接用作肥料。其中一种方法是用斜发沸石处理，将植物养分转移到沸石上，然后再回收。在这个过程中，一个重要的因素是斜发沸石所承受的初始养分负荷。本文旨在研究从源分离的尿液中向斜发沸石转移铵和钾，重点研究在不同初始氨负荷下达到的表面浓度和去除效率。结果表明，在达到 10 mg NH4 (+)/g 斜发沸石的去除效率之前，初始负荷的变化对去除效率没有显著影响。在初始负荷增加后，去除效率随着初始负荷的增加而降低，可达到高达 15 mg NH4 (+)/g 斜发沸石的高度可接受的效率。总的来说，增加初始负荷会导致最终表面浓度增加，但去除效率降低。
