新型废水处理工艺--人工湿地的设计方法

根据水流形态的不同,人工湿地可以分为地表流工艺和地下潜流工艺,人工湿地实际上是一种推流式生物反应器,一般利用芦苇作为供氧手段,人工湿地具有良好的净化废水功能,BOD去除率达85—95％,SS去除率达90％,氨氮和磷的去除率约为40—50％,而其基建和运行费用仅为传统二级处理的1/10—1/2.本文介绍了人工湿地的设计方法.

Design Methods for Constructed Wetlands-A New Wastewater Treatment Process

The constructed wetland is a new wastewater treat-ment process. Based on the flow status, the constructed wetlands can be divided into surface flow system and subsurface flow system. Basically, the wetlands are plug flow reactor using common reeds or other plant for oxygen transfer. The BOD and SS removal rates can he as high as 85%-95% and about 90%, respectively. The NH3-N and P removal rates can reach about 40%-50%. However, the costs for the construction and operation of the constructed wetlands are 0.1-0.5 of the conventional secondary wastewater treatment processes. The design methods for constructed wetlands are introduced in this paper.