| Constructed wetland technology is a kind of low-cost and high-efficiency ecosystem engineering for wastewater treatment and water reuse, which factor about hydraulics has a great effects towards the system's management. However, nowadays, there are few researches on the interior mechanism of the constructed wetland system, especially the ones relevant to the different flow. According to the reality that the construction and design of the wetland always depends on traditional experienced formula, which, in a certain extent, has a bad influence to the efficiency of the refine function of the constructed wetland, the author work comprehensively on the important problems on Hydraulics and optimal design of constructed wetland, then make three classical flow systems and five stuffing make up of six series processing unit.horizontal subsurface flow constructed wetland,vertical flow constructed wetland and subsurface-vertical flow constructed wetland are composed of six flow systems: vertical flow constructed wetland and subsurface-vertical flow constructed wetland, vertical flow constructed wetland and vertical flow constructed wetland, vertical flow constructed wetlandand horizontal subsurface flow constructed wetland ,subsurface-vertical flow constructed wetland and vertical flow constructed wetland, subsurface-vertical flow constructed wetland and subsurface-vertical flow constructed wetland, subsurface-vertical flow constructed wetland and horizontal subsurface flow constructed wetland.The three flow system all in low DO condition, vertical flow constructed wetland compare with other have high DO concentration and well condition where microorganism can contact stuffing. So vertical flow constructed wetland has good result on deeling with COD and nitrogenStuffing from local familiar materiel. Slag can strongly adsorb Phosphorus steady. Slag Can be available when sewage Phosphorus loading about 5mg/L three month ,when Stuffing in saturation ,Can adjust pH to let Phosphorus release to make Stuffing to renew. |
