LU Bo,CUI Rong-rong,GONG Hui,et al.Short-term Impact of Salinity and N-Vanillylnonanamide on Activity of Anaerobic Ammonium Oxidation Bacteria[J].China Water & Wastewater,2024,40(1):32-38.
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Short-term Impact of Salinity and N-Vanillylnonanamide on Activity of Anaerobic Ammonium Oxidation Bacteria

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第1期 Page: 32-38 Column: Date of publication: 2024-01-01
Author(s):
LU Bo1; CUI Rong-rong2; 3; GONG Hui3; KUANG Qian1; TAO Ben-sen1; CHEN Zhi-gang1; LU Dan-dan2; 3; DIAO Si-yuan2; 3; SHI Wen-jing2; 3; YIN Rui-hong2; 3; DAI Xiao-hu3
（1. Chongqing Environment & Sanitation Group， Chongqing 400000， China； 2. College of Environmental and Chemical Engineering， Shanghai University of Electric Power， Shanghai 200090， China； 3. College of Environmental Science and Technology， Tongji University， Shanghai 200092， China）
Keywords:
Anammox;  salinity;  N-vanillylnonanamide;  kitchen waste;  inhibition model
Abstract:
Anaerobic ammonium oxidation (Anammox), an efficient nitrogen removal process with low energy and chemical consumption, has attracted much attention in the field of wastewater treatment. The traditional treatment process of liquid digestate from anaerobic fermentation of kitchen waste has high energy input and large carbon source consumption, and the selection of Anammox is expected to significantly reduce the treatment cost. Kitchen waste often has high salinity, and in some areas such as Chongqing and Sichuan, there often contains a large amount of chili peppers in kitchen waste due to dietary habits. This paper investigated the effects of salinity and N-vanillylnonanamide on the activity of Anammox bacteria. The separate and synergistic effects of N-vanillylnonanamide concentration and salinity shocks on nitrogen removal performance were investigated by setting up batch experiments for detection of Anammox activity. Both salinity and N-vanillylnonanamide inhibited the Anammox activity. The fitting results of Hill inhibition model showed that the 50% inhibitory concentration of NaCl was 15.4 g/L. The inhibition of N-vanillylnonanamide on Anammox activity was limited due to its solubility, and high concentration of N-vanillylnonanamide (20 mg/L) reduced the Anammox activity by approximately 20%. The simultaneous presence of salinity and N-vanillylnonanamide had a synergistic inhibitory effect on Anammox activity, resulting in the 50% inhibitory concentration of NaCl decreased to 14.6 g/L.
Last Update: 2024-01-01