| Title |
A Study on the Application of Natural Zeolite as Coagulant Aid for Effluent Quality Improvement in Private Sewage Treatment Facility |
| Authors |
최정수 ( Jung Su Choi ) ; 주현종 ( Hyun Jong Joo ) |
| Keywords |
Hydraulic retention time; HRT; Natural zeolite; Setting velocity; Small size private sewage treatment facility; TSS; TP |
| Abstract |
The purpose of this study is to solve the problem of nutrient removal due to rapid hydraulic retention time (HRT) variation in small size private sewage treatment facility and to have better effluent quality by using natural zeolite as a coagulant aid. The experiments were conducted by applying different conditions of HRT, coagulant, and zeolite dosages. As an experimental result, TBOD5, TSS, and TP removal efficiencies were 64.9%, 94.5%, and 98.8% at co-injection with zeolite. Overall removal efficiencies of TBOD5, TSS, and TP have improved 15.7, 28.7, 6.1%, respectively. This result shows that zeolite addition could improve flocculation, increase setting velocity, and thus have better treatment. Therefore the use of zeolite as a coagulant aid can be useful in small size private sewage treatment facility, where especially extra nutrient removal is required to meet the legal standard for discharge. |