Unbalanced inhibition on granular and mixed anammox sludge by different molecular weight fractions of unbiodegradable proportion of sludge anaerobic digestion reject water
Unbalanced inhibition on granular and mixed anammox sludge by different molecular weight fractions of unbiodegradable proportion of sludge anaerobic digestion reject water
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DOI：
10.1016/j.jwpe.2021.102197
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发表时间：
2021-08
影响因子：
7
通讯作者：
Shunyu Wang;H. Gong;Jianning Ding;Enhui Xu;Rongrong Cui;Dianhai Yang;Gu Guowei-;Xiaohu Dai
中科院分区：
文献类型：
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作者：
Shunyu Wang;H. Gong;Jianning Ding;Enhui Xu;Rongrong Cui;Dianhai Yang;Gu Guowei-;Xiaohu Dai
厌氧氨氧化是一种可持续的低成本高氨氮废水处理方法。污泥厌氧消化废水中的不可生物降解部分对厌氧氨氧化比活性（SAA）表现出不平衡的抑制作用。当原水预处理后的尾水投加量为50%时，可获得0.155 gN·gVSS−1·d−1（以氨氮计）的SAA。相比之下，100%未经稀释的原水预处理后废水的SAA降至0.061 gN·gVSS−1·d− 1，约为半稀释率的60.65%。比较颗粒污泥和混合厌氧氨氧化污泥的SAA，在相同的污泥浓度下，颗粒污泥比混合厌氧氨氧化污泥表现出更大的恢复力，且具有更高的丰度。不同分子量级分的废水的不平衡抑制观察。SAA试验表明，分子量在10 ~ 30 kDa之间的有机物对厌氧氨氧化活性的抑制作用较强，但这一截留分子量范围内的有机物所占比例有限。此外，三维激发发射矩阵荧光光谱（EEM）和傅里叶变换红外光谱（FTIR）分析结果表明，在此MWCO范围内的难降解污泥消化废水中存在类富里酸物质、类蛋白质物质、羧酸及其衍生物和小分子酰胺基团。
Anaerobic ammonium oxidation (anammox) was a sustainable low-cost method to deal with high ammonia wastewater. Unbiodegradable proportion of sludge anaerobic digestion reject water demonstrated unbalanced inhibitory effects on specific anammox activity (SAA). The SAA of 0.155 gN·gVSS−1·d−1(based on ammonia) was obtained with 50% raw pretreated reject water proportion. In contrast, SAA decreased to 0.061 gN·gVSS−1·d−1with 100% raw pretreated reject water without dilution, about 60.65% of that at half dilution ratio. Comparing the SAA of granular and mixed anammox sludge, granular sludge demonstrated more resilience than mixed anammox with higher abundance at same sludge concentration. Unbalanced inhibition by different molecular weight fractions of reject water was observed. The SAA tests shown that the organics between 10 kDa and 30 kDa caused more severe inhibition on anammox activity, though the organic concentration in this molecular weight cut-off (MWCO) range was only accounted for limited proportion. Besides, the results of three-dimension excitation emission matrix fluorescence spectroscopy (EEM) and Fourier transform infrared spectra (FTIR) analysis demonstrated the existence of fulvic acid-like substances, tryptophan-like protein substances, carboxylic acid and derivatives and small amide groups in this MWCO range of unbiodegradable sludge digestion reject water.