Systems Simulation of the Effects of Tertiary Treatment for Carbon,Nitrogen,and Phosphorus Removal Upon Primary Productivity,Standing Crop and Community Structure of Autotrophic and Metertrophic Communities in Receiv ing Model Streams.

摘要

A controllable laboratory system was designed,composed of several model streams established under comparable environmental conditions. The streams were used in studying the effects of various conventional tertiary nutrient removal schemes upon the standing crop biomass, phytopigments,primary productivity,and community structure,of autotrophic periphyton communities. Ferric chloride coagulation-precipitation,breakpoint chlorination,and activated carbon absorption with dual media filtration was used for removal of phosphorus,nitrogen,and carbon respectively. All types of teritary treatment methods studied resulted in varying increases in the above biological parameters. These results indicate that using accepted methods for nutrient removal may not prevent algal productivity resulting in more rapid euthrophication.