| Title |
Wastewater Treatment Characteristics of Anaerobic Fixed Bed Reactors Packed with Iron Media |
| Authors |
전석준 ( Seok Jun Jeon ) ; 현경학 ( Kyoung Hak Hyun ) ; 정경영 ( Gyoung Young Jung ) |
| Abstract |
The purpose of this study was to develop an alternative coagulant supply device to replace a conventional chemical dosing system used in the chemical precipitation process for phosphorus removal, Bench-scale multi-stage anaerobic fixed bed reactors were packed with iron nuts and domestic wastewater was fed continuously to enhance microbially induced corrosion under anaerobic condition. Total iron concentrations in the effluent varied between 7.8mg/L- 13.0mg/L over the 90days of testing period ensuring sustained corrosion of iron in the reactors. The corrosion of iron in the anaerobic reactor was greatly influenced by sulfate reducing bacteria(SRB) as sulfate concentration was inversely proportional to total iron concentration from the first to the last reactor effluents, Besides the merits of iron as coagulants supply, favourable characteristics such as alkalinity production and minimal organic loss for sustained biological denitrification were identified, In case of introducing the anaerobic fixed bed reactor prior to secondary treatment system, it is required to operate the anaerobic reactor at the HRT of 67.5 minute or above in order to remove phosphorus from domestic wastewater. |