AMMONIA NITROGEN REMOVAL USING OYSTER SHELL AS ALKALINITY-RELEASING MEDIA IN A BIOLOGICAL NITRIFICATION SYSTEM

作者：Han, Z.; Li, C.; Fan, R.; Lin, X.; Liu, D.; Wang, S.; Zhu, S.; Ye, Z.^*

来源：Transactions of the ASABE, 2017, 60(5): 1721-1728.

DOI：10.13031/trans.12232

• Alkalinity
• Ammonia nitrogen
• Nitrification
• Oyster shell (OS)
• pH
• Wastewater

The booming shellfish aquaculture industry in China generates a large amount of oyster shell (OS) as a by-product, which poses an urgent threat to the sensitive ecosystem. In this study, the feasibility of enhanced NH4+-N removal from wastewater using OS as an alkalinity provider was explored using a set of shaken flasks continuously operated in batch mode. The results indicated that NH4+-N removal was enhanced due to the presence of OS, considering the variations in NH4+-N concentration and NH4+-N removal efficiency. Furthermore, the nitrification rate, calculated as NH4+-N removed per hour, was higher with greater OS addition. The most important result is an equation for estimating OS addition, based on alkalinity analysis, that provides a reference for the design of nitrifying biofilters with OS as media. Additionally, the alkalinity released from OS due to biological nitrification was confirmed using x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM).

• 出版日期2017
• 单位浙江大学; 太原理工大学