高速公路服务区污水生态土壤处理的基质配比研究

采用清水渗透、污水渗透、静态吸附、动态穿透和给水度等试验，确定了重庆地区高速公路服务区污水生态土壤处理系统中基质配比、水力负荷和湿干比.结果表明，根据选材容易、水力负荷大、除污能力强等原则，推荐重庆地区高速公路服务区污水生态土壤系统中处理层的配比基质为30.67%紫色土、61.33%河沙和8.00%煤渣混合基质，承托层为0.20 m厚的卵石与0.10 m厚的碎石.生态土壤处理系统总高度1.6 m，其中1.00、1.20、1.40、1.60 m处的水力负荷分别为0.344、 0.322、0.307、 0.298 m·d^-1.处理层的淹水时间1 d、落干时间1.5 d，即湿干比为1∶1.5.

Matching Study on Treatment of Sewage from Highway Service Area by Ecological Soil System in Chongqing

The osmotic coefficient by clear water and sewage, static adsorption, dynamic and water penetration tests were conducted to determine the parameters, which including materials matching, hydraulic loading, and wet to dry ratio, in the treatment of sewage from highway service area (SHSA) in Chongqing by ecological soil system. The results showed that, according to principles of easier getting, high and stable hydraulic load, large decontamination capability, the materials matching of working layer SHSA was made of 30.67% soil, 61.33% sand and 8.00% cinder in Chongqing, and the supporting layer was consisted of 0.20 m cable and 0.10 m broken stone (height). The total height of the ecological soil system was 1.6 m, at which 1.00, 1.20, 1.40, 1.60 m department of hydraulic loading were 0.344, 0.322, 0.307, 0.298 m x d(-1), respectively. The flooding period of working layer was 1 d and the drying period 1.5 d, i. e, the ratio of wet to dry was 1:1.5.