| Title |
Anaerobic and Aerobic ( AA ) Treatment of the Textile Wastewater |
| Authors |
김정규 ; 임연택 ; 류재근 ; 서윤수 ( Jeong Gyu Kim ; Yeong Taek Lim ; Jae Keun Ryu ; Yoon Soo Suh ) |
| Abstract |
The treatability of the textile wastewater containing so many kinds of recalcitrant such as organic dyes and PVA (polyvinyl alcohol) is usually poor, because of the high temperature high alikalinity and the recalcitrant containings of the wastewater. Although the major part of textile wastewater treatment plants in Korea consist of a physico-chemical process and a biological process, the treatability is not so high in the reason above mentioned. Therefore, we have developed a new process without physico-chemical pretreatment process, using anaerobic microorganisms which is more resistant for the biotoxicants and recalcitrants. A bench scale reactor of the anaerobic & aerobic (AA) process consists of two anaerobic tanks (2 liters each) and an aerobic tank. The hydraulic retention time(HRT) of anaerobic and aerobic tank was 30 hours and the temperature was setted to 40℃. The dissolved oxygen concentration was maintained at the range of 2∼3 ㎎/ℓ. The reactor was operated with the wastewater from the textile industry which produce cotton and systhetic fiber. This industry has a dyeing and a printing process. The chemical oxygen demand(COD), biochemical oxygen demand (BOD), concentration of PVA, color index and the Microtox biological toxicity were observed for 150 days of operation period. This experiment represents a good treatablity. The removal efficiency of COD, BOD, PVA and color index were 82%, 94%. 98% and 73%, respectively. The causes of this high treatment effciency were primary degradation of recalcitrants and the decreasing of biotoxicity in anaerobic tank. |