WANGJian,LUHui,YOUZhilei,et al.Productive Experiment Study on Aerobic Granular Sludge Process Based on Pelletizing Agent for AAO Transformation[J].China Water & Wastewater,2025,41(13):100-105.
基于成球剂的AAO-好氧颗粒污泥工艺生产性试验
- Title:
- Productive Experiment Study on Aerobic Granular Sludge Process Based on Pelletizing Agent for AAO Transformation
- Keywords:
- aerobic granular sludge; AAO process; continuous flow; sludge reduction; water quality enhancement
- 摘要:
- 在苏南某污水处理厂开展生产性试验，将筛选后的污泥使用成球剂接种后加入AAO工艺的生化单元，研究此策略下好氧颗粒污泥（AGS）的造粒过程与污染物去除效果。结果表明，该工艺仅需14 d即可实现AGS的成功造粒，平均粒径为186 μm，粒径>200 μm的AGS占比可达34.6%。在污泥接种阶段，微生物依托成球剂作为载体凝聚形成结构致密的污泥聚集体，并在加入生化反应池后在水力剪切力作用下进一步颗粒化。改造后的工艺对污染物具有良好的去除效果，出水COD、TN和TP浓度分别为39、9.7和0.23 mg/L，比原工艺分别降低了3%、5%和4%，且出水水质波动较小。相较于传统AAO工艺，该工艺不仅提高了污染物去除能力，还降低了能耗和剩余污泥产量，具有用于连续流污水处理厂升级改造的潜力。
- Abstract:
- A productive experiment was conducted in a wastewater treatment plant (WWTP) in Southern Jiangsu Province to investigate the granulation process and pollutants removal efficiency of aerobic granular sludge (AGS) inoculated with pelletizing agents based on AAO. The results showed that successful AGS granulation could be achieved within 14 days, with an average particle size of 186 μm and 34.6% of AGS exceeding 200 μm. During the sludge inoculation phase, microorganisms aggregated into compact sludge clusters using pelletizing agents as carriers, which subsequently underwent further granulation under hydraulic shear forces in the bioreactor. The modified process exhibited enhanced pollutant removal performance, with effluent COD, TN, and TP concentrations reaching 39 mg/L, 9.7 mg/L, and 0.23 mg/L respectively, representing 3%, 5%, and 4% reductions compared to the original process, while maintaining stable effluent quality. Compared with conventional AAO processes, this process not only improves the pollutants removal capacity, but also reduces the energy consumption and residual sludge production, and has the potential to be used for upgrading continuous flow WWTPs.
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