A comparative study of permeable layer materials and aeration regime on efficiency of multi-soil-layering system for domestic wastewater treatment in Thailand
A comparative study of permeable layer materials and aeration regime on efficiency of multi-soil-layering system for domestic wastewater treatment in Thailand
复制标题
DOI：
10.1080/00380768.2003.10410350
复制
发表时间：
2003-12-01
影响因子：
2
通讯作者：
Wakatsuki, T
中科院分区：
文献类型：
--
作者：
Boonsook, P;Luanmanee, S;Wakatsuki, T
设计了多层土壤层（MSL）系统，用于净化生活污水和处理受污染河水。MSL系统通常由与渗透层交替的土壤混合块层组成。渗透层具有防止堵塞和增加废水通过土壤混合物块的渗透效率的作用。在这项研究中，五个MSL系统的比较效率作为五个渗透层材料（沸石，沸石化沸石，沸石，砾石，木炭）的功能进行了研究。MSL系统构建在15 x 50 x 100 cm的盒子中，其中土壤混合物块分别包含重量比为6：1：1的桑迪粘土、洋麻+玉米芯和铁屑，并与渗透层交替填充。结果表明，在非曝气条件下，负荷率为96-346 L·m（-2）·d（-1）的MSL系统均能降低COD（342- 1，231 mg L-1），BOD 5（201-802 mg L-1）和可溶性活性磷（SRP）（3.5-10.1 mg P L-1），百分比分别为79.0-98.1、80.0-99.6和97.1- 100%。在96-346 L·m（-2）·d（-1）负荷下，沸石和活性炭基质的MSL系统对TN（41.4-65.5 mg·N·L（-1））的去除率分别为79.0- 92.1%和30.7- 88.9%。在防止堵塞方面，木炭基MSL系统是最有效的，其次是砾石和沸石基MSL。污染物去除的表观效率，为沸石沸石，沸石和砾石为基础的MSL系统是低的。通过开-关曝气操作，MSL系统在降低COD、BOD 5和SRP水平（下文称为“去除”）方面的效率显著提高。总体而言，基于沸石的MSL系统似乎比其他MSL系统更有效。然而，如果能够获得最佳的曝气，炭基MSL系统的去除效率可能会有所提高。以64，000 L·m（-3）·d（1）（-）的速率曝气1周，交替2周不曝气，可提高COD、BOD_5和SRP的去除率，但对TN的去除率无影响。
Multi-soil-layering (MSL) system was designed for purifying domestic wastewater and for treating polluted river water. MSL system is typically comprised of layers of soil mixture blocks alternating with permeable layers. The permeable layer has roles of preventing clogging and to increasing the efficiency of infiltration of wastewater through the soil mixture blocks. In this study, the comparative efficiency of five MSL systems as a function of five permeable layer materials (zeolite, zeolitized perlite, perlite, gravel, and charcoal) was investigated. The MSL systems were constructed in 15 x 50 x 100 cm boxes where the soil mixture blocks contained sandy clay soil, kenaf + corncob, and iron scraps at a ratio of 6: 1 : 1 by weight, respectively, and filled up in alternation with the permeable layer. The results indicated that all the MSL systems at loading rates of 96-346 L m(-2) d(-1) under non-aerated conditions were able to reduce the levels of COD (342-1,231 mg L-1), BOD5 (201-802 mg L-1), and soluble reactive phosphorus (SRP) (3.5-10.1 mg P L-1) at percentages of 79.0-98.1, 80.0-99.6, and 97.1-100%, respectively. The zeolite and the charcoal-based MSL systems under a 96-346 L m(-2) d(-1) loading rate effectively reduced the level of TN (41.4-65.5 mg N L-1) at percentages of 79.0-92.1 and 30.7-88.9%, respectively. In terms of prevention of clogging, the charcoal-based MSL system was the most effective, followed by the gravel and zeolite-based MSL. The apparent efficiency of pollutant removal, for zeolitized perlite, perlite, and gravel-based MSL systems was low. With an on-off aeration operation, the efficiency of the MSL systems in the reduction of the levels of COD, BOD5, and SRP (hereafter reference to as "removal") was significantly enhanced. Overall, the zeolite-based MSL system seemed to be more effective than the other MSL systems. However, if optimum aeration could be obtained, the removal efficiency of charcoal-based MSL system might be improved. Aeration at a rate of 64,000 L m(-3) d(1)(-) for I week alternating with 2 weeks of non-aeration enhanced the removal of COD, BOD5, and SRP but not that of TN.