Abstract: Using partially anaerobic granular sludge and flocculent sludge as seed sludge,aerobic granular sludge is cultivated by gradually decreasing sludge sedimentation time in the sequencing batch reactor (SBR) fed with synthetic wastewater.The effects of different temperature and C/N ratios of influent on the stability of aerobic granular sludge are investigated as well.It is found that the cultivation of aerobic granular sludge needs to spend only 30 days,the average granular sizes of aerobic granular sludge is 3 mm,its sludge volumetric index (SVI) is around 37 mL·g-1,and it exhibits good sedimentation performance.The determining results by scanning electron microscopy show there are many holes on the surface of granular.The impact of low cultivation temperature (10℃) and normal cultivation temperature (20℃) on the shapes of aerobic granular sludge is not significant.Under low cultivation temperature,however,the water quality indexes of effluent are unstable,and the removal rates of COD,NH3-N,TN all are lower than that under normal cultivation temperature.The C/N ratio has not obvious impact on COD removal rate,but has more obvious effect on nitrogen removal rate.The aerobic granular sludge will start to lose stability and the removal rate of TN and NH3-N will be less than 60% when C/N ≤ 5.The aerobic granular sludge loses completely its stability when the C/N reduces to 3.
黄思琦, 邓风, 张睿, 佘谱颖, 艾乐仙. 好氧颗粒污泥培养及其稳定性研究[J]. 现代化工, 2018, 38(2): 106-109.
HUANG Si-qi, DENG Feng, ZHANG Rui, SHE Pu-ying, AI Le-xian. Cultivation of aerobic granular sludge and its stability study. Modern Chemical Industry, 2018, 38(2): 106-109.
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