The performance of biological anaerobic filters packed with sludge-fly ash ceramic particles (SFCP) and commercial ceramic particles (CCP) during the restart period: effect of the C/N ratios and filter media.
Two lab-scale upflow biological anaerobic filters (BAF) packed with sludge-fly ash ceramic particles (SFCP) and commercial ceramic particles (CCP) were employed to investigate effects of the C/N ratios and filter media on the BAF performance during the restart period. The results indicated that BAF could be restarted normally after one-month cease. The C/N ratio of 4.0 was the thresholds of nitrate removal and nitrite accumulation. TN removal and phosphate uptake reached the maximum value at the same C/N ratio of 5.5. Ammonia formation was also found and excreted a negative influence on TN removal, especially when higher C/N ratios were applied. Nutrients were mainly degraded within the height of 25 cm from the bottom. In addition, SFCP, as novel filter media manufactured by wastes-dewatered sludge and fly ash, represented a better potential in inhibiting nitrite accumulation, TN removal and phosphate uptake due to their special characteristics in comparison with CCP.
Yue
Qinyan
Q
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. qyyue@sdu.edu.cn
Han
Shuxin
S
Yue
Min
M
Gao
Baoyu
B
Li
Qian
Q
Yu
Hui
H
Zhao
Yaqin
Y
Qi
Yuanfeng
Y
D000693:Anaerobiosis; D002244:Carbon / Q000032:analysis* / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D060729:Coal Ash; D003470:Culture Media; D005374:Filtration / Q000295:instrumentation*; D009566:Nitrates / Q000302:isolation & purification; D009584:Nitrogen / Q000032:analysis*; D052638:Particulate Matter / Q000737:chemistry*; D010710:Phosphates / Q000378:metabolism; D012722:Sewage / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid
D060729:Coal Ash; D003470:Culture Media; D009566:Nitrates; D052638:Particulate Matter; D010710:Phosphates; D012722:Sewage; D002244:Carbon; D009584:Nitrogen