Gardner E A, Morton D, Sands J, Matthews P, Cook F J, Jayawardane N S
University of Queensland, Gatton Campus, Queensland, Australia, 4343.
Water Sci Technol. 2001;43(10):335-42.
FILTER is an innovative, CSIRO developed system for treating effluent using high rate land application and subsequent effluent recapture via a closely spaced, subsurface drainage network. We report on the summer performance of a FILTER system established in a subtropical environment on a relatively impermeable swelling clay soil underlain by a deep regional water table. Using secondary treated sewage effluent, the FILTER system produced effluent of tertiary nutrient standards (< or = 5 mg/L TN; < or = 1 mg/L TP), with salinity levels suitable for subsequent irrigation reuse (EC < or = 2.5 dS/m). Removal of faecal coliforms was considerably less effective. The hydraulic loading rate achieved was about two and a half times large than conventional irrigation demand, but this was associated with high deep percolation losses (c 3 mm/day). Comparisons are made with the original FILTER system developed and tested by Jayawardane et al. in temperate Australia. Suggestions are made for modifications to, and further testing of FILTER in a subtropical environment.
FILTER是一种创新系统，由澳大利亚联邦科学与工业研究组织（CSIRO）开发，用于通过高速土地灌溉处理废水，并随后通过紧密间隔的地下排水网络回收废水。我们报告了在亚热带环境中，于相对不透水的膨胀黏土上建立的FILTER系统的夏季运行情况，该黏土下方有深层区域地下水位。使用经过二级处理的污水，FILTER系统产生了符合三级营养标准（总氮≤5毫克/升；总磷≤1毫克/升）的废水，且盐度水平适合后续灌溉回用（电导率≤2.5 dS/m）。粪便大肠菌群的去除效果则要差得多。实现的水力负荷率约为传统灌溉需求的2.5倍，但这伴随着较高的深层渗漏损失（约3毫米/天）。文中将该系统与Jayawardane等人在澳大利亚温带地区开发并测试的原始FILTER系统进行了比较。针对在亚热带环境中对FILTER系统进行改进和进一步测试提出了建议。
