| Title |
The Effect of the Salt Concentration on the Biodegradability and Settleability in Activated Sludge Process |
| Authors |
서정범 ( Seo Jeong Beom ) ; 황창민 ( Hwang Chang Min ) |
| Keywords |
Activated Sludge; Salt concentration; Biodegradability; Settleability |
| Abstract |
This study was aimed at finding out the influence of salinity on the treatability and settleability in activated sludge process. For this, according to salinity, the distinctive feature of organic concentration such as TOC and BOD, sludge volume index(SVI) and observed yield coefficient were examined. The result of batch reactor test showed that the influence of salinity at the high concentration of MLSS was low on the removal efficiency of TOC. On the other hand, the result of continuous flow stirred tank reactor(CSTR) test showed that the TBOD removal efficient was higher the F/M ratio 0.4㎏BOD/㎏MLSS·day than the F/M ratio 0.2㎏BOD/㎏MLSS·day. The influence of salinity on the SVI was found higher the F/M ratio 0.4㎏BOD/㎏MLSS ·day than the F/M ratio 0.2㎏BOD/㎏MLSS·day to 10,000㎎/L of salinity. The test also showed that filamentous microorganism rapidly increased when salinity was l5,000㎎/L. SVI was stabilized in the reactor with F/M ratio 0.4㎏BOD/㎏MLSS·day causing activated sludge more viscous. On the other hand, when the F/M ratio kept at about 0.2㎏BOD/㎏MLSS·day, SVI increased rapidly due to a sludge bulking. |