Keywords: 
• reclaimed water /
• landscape water /
• bank filtration /
• water quality control /
• algae

Abstract: In the process of reclaimed water reused for landscape， in order to compare the effect on quality change of landscape lake recharged by reclaimed water with different processes， “municipal secondary effluent+BAF+ozonation+GFH” and “municipal secondary effluent + ozonation” were used as reclaimed water treatment processes respectively， while bank filtration was used as landscape quality maintenance technology，then the technology of reclaimed water quality control for landscape was studied. The result showed that the discharge of effluent of “municipal secondary effluent+ozonation” was larger which caused water flew fast. The average water flow was 25.5 m3/d when the system run 24 hours everyday. However， the concentrations of nitrogen and phosphorus were both higher. For the effluent of “municipal secondary effluent + BAF + ozonation + GFH”， the concentrations of nitrogen and phosphorus were controlled at lower level. The effluent flow of GFH ranged from 8 to 14 m3/d， which led to slow water flow. Algae were detected in artificial lake. The removal rates of NH+4-N were 30.5% and 20.8%， respectively by BF in two systems. In the system of “municipal secondary effluent + ozonation”， the TN average concentration of artificial lake influent was 24.309 mg/L， TP was 0.583 mg/L and N/P was 41 which were suitable for growth of hydrodictyon reticulatum. Hydrodictyon reticulatum had strong removal ability of nitrogen (mainly NH+4-N) and phosphorus in lake. In the system of “municipal secondary effluent + BAF + ozonation + GFH”， TP concentration of artificial lake influent was less than 0.05 mg/L， which was suitable for growth of cyanobacteria.