| Title |
Sewage Treatment by Activated Sludge Process Augmented with Additive |
| Authors |
성일화 ; 최용수 ; 박흥석 ; 유명진 ( Il Wha Sung ; Yong Su Choi ; Hung Suck Park ; Myong Jin Yu ) |
| Abstract |
An experiment was conducted in order to examine the effect of commercial additive which contained humus plus minerals. The additive with the trade name $quot;Biothrough$quot; was used in this study. In reactors A and B, an additional aeration tank for 12 hours detention of recycle sludge was installed and $quot;Biothrough$quot; was submerged inside the tank. In reactor C, $quot;Biothrough$quot; was submerged inside reactor and was not used in reactor D, the control unit. The experimental results are summarized as follows ; SVI was lowest for reactor A at the FiM ratio of both 0.15 to 0.83 and 0.14 to 0.51 ㎏ BOD/㎏ MLSS·day. The biopolymer excretion per unit weight of activated sludge increased in accordance with the increase of HRT. The results indicated that the reactors attached with additive were more efficient in improving the settling characteristics of activated sludge. In that respect, it was thought that the attachment of additive in tank improved activated sludge characteristics and further detention led the microbes towards favorable endogenous phase where more excretion of biopolymer was possible. Such increase of biopolymer excretion improved the aggregation and in turn the settle ability of activated sludges. |