On-Line Monitoring and Control of a Partially Packed BAF System for Nitrogen Removal in a Synthetic Wastewater
In this study, dissolved oxygen (DO), pH and oxidation reduction potential (ORP) parameters were used to on-line monitor and control of a partially packed biological aerated filter (BAF) reactor for enhancing nitrogen removal efficiency by fuzzy tools. A BAF system was operated in a fixed 6 h hydraulic retention time with an organic loading rate of 0.4 kg COD/m3/d. This study aims to establish control strategies for biological nitrogen removal using ORP, DO and, pH profiles. A strong linear relation between ORP and log of DO was established in the study. The break point in the pH and ORP curves in the anoxic period coincided with the end of denitrifying activity. The nitrate break point (nitrate knee) measured by ORP indicates the end of the denitrification period whereas the ammonia valley by pH reflects the end of the nitrification period. During the period, the ammonia-nitrogen and COD removals were 92.3％ and 95.06％ respectively. Therefore, the fuzzy control was operated for 240 min aeration time and 120 min anoxic period which resulted with aeration cost saving of 33.33％. In general, the experimental study shows that the fuzzylogic tools can easily be implemented in wastewater process-control and monitoring systems to improve the effluent quality and reduce the energy consumption.
Oxidation-reduction potential (ORP) pH Dissolved Oxygen (DO) Biological Aerated Filter (BAF).
Pramanik BIPLOB Suja FATIHAH Zain SHAHAROM
Civil & Structural Engineering Dept, Faculty of Engineering & Built Environment University Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, UKM.
国际会议
昆明
英文
14-17
2010-10-17（万方平台首次上网日期，不代表论文的发表时间）