To improve treatment performance of the solar septic tank technology, novel constructed wetland systems have been proposed as an effective post-treatment system. This study aimed to investigate the treatment performance of the multi-soil layer based constructed wetland (MSL-CW) and comparing with the modified constructed wetland (mCW) for treating solar septic tank effluent in long-term operation. Pilot-scale MSL-CW and mCW units were operated in parallel under the same conditions during the period of 2016 - 2019. Removal efficiencies of TCOD, SCOD and TBOD in the MSL-CW were not significantly different (p<0.05) from those of the mCW unit, which were 70-72%, 63-68 % and 78-82%, respectively. The removal efficiencies of TSS, TKN, NH₄-N and TP were found in the same magnitude in both units. The total coliform and E.coli counts in the effluent of MSL-CW and mCW units were reduced from 10⁵ MPN/100 mL to be lower than 10³ MPN/100 mL. These long-term operational results demonstrated that the effluent from the MSL-CW and mCW units could meet the global standards of non-sewered sanitation systems and the WHO guidelines. The effects of seasonal variations and plant harvesting on the monthly treatment performance are discussed in this study.

为了提高太阳能化粪池技术的处理性能，已经提出了新颖的湿地系统作为有效的后处理系统。这项研究旨在研究基于多土壤层的人工湿地（MSL-CW）的处理性能，并将其与改良的人工湿地（mCW）进行长期操作，以处理化粪池废水。在2016年至2019年期间，中试MSL-CW和mCW单元在相同条件下并行运行。MSL-CW中TCOD，SCOD和TBOD的去除效率与PLS的去除率没有显着差异（p <0.05）。 mCW单位分别为70-72％，63-68％和78-82％。TSS，TKN，NH ₄的去除效率在两个单位中发现-N和TP的幅度相同。MSL-CW和mCW单元流出物中的大肠菌群和大肠杆菌总数从10 ⁵ MPN / 100 mL降低到低于10 ³ MPN / 100 mL。这些长期的运行结果表明，MSL-CW和mCW单元的废水可以满足非下水道卫生系统的全球标准和WHO的准则。在这项研究中讨论了季节性变化和植物收获对每月处理性能的影响。