Effect of High Hydraulic Loading on Intensive Shrimp Aquaculture Wastewater Treatment Performance in Constructed Wetland
高水力负荷对人工湿地处理精养虾塘排水效果的影响

A pilot scale experiment of intensive shrimp aquaculture wastewater treatment using horizontal subsurface flow constructed wetland is carried out and the effect of treatment performance under high hydraulic loading conditions 1.10-5.34m3·(m2·d)-1] is investigated. The results show that, hydraulic loading and reduction efficiency of COD, TN, TP and SS is negatively correlated. However, with the hydraulic load increases, the removal rate of CODup to 69g·(m2·d)-1], TNup to 1.8 g·(m2·d)-1] and SSup to 117.6 g·(m2·d)-1] first increased and then decreased, while the change of TP removal rate is not obvious. Therefore, under the range of 2.52 m3·(m2·d)-1 to 3.24 m3·(m2·d)-1 high hydraulic loading, constructed wetland shows best technically feasible for managing wastewater treatment of intensive aquaculture.