LIULan-jin,HEYuan-kai,ZHANGBing,et al.Performance and Granulation Process of Aerobic Granular Sludge for Treating Livestock Wastewater[J].China Water & Wastewater,2024,40(5):29-36.
好氧颗粒污泥处理畜禽废水的效能及颗粒化过程
- Title:
- Performance and Granulation Process of Aerobic Granular Sludge for Treating Livestock Wastewater
- 摘要:
- 为探究畜禽废水条件下好氧颗粒污泥（AGS）的特性变化，开展了基于AGS技术处理模拟畜禽废水的研究。结果表明，以模拟畜禽废水作为进水启动反应器，经过35 d的培养，形成了成熟稳定的AGS；在污泥颗粒化过程中，蛋白质（PN）和多糖（PS）含量分别增加了2.2和3.1倍，有利于维持颗粒污泥结构稳定性；蛋白质二级结构中，β-折叠相对含量增多，表明污泥疏水性增强，有利于微生物之间相互聚集从而加速污泥颗粒化进程；AGS系统对COD和NH4+-N的去除率最高达到97.31%和78.71%，其主要的去除机理是作为营养物质被微生物同化吸收。
- Abstract:
- This paper investigated the characteristics of aerobic granular sludge (AGS) for treating simulated livestock wastewater. The reactor was started by feeding simulated livestock wastewater, and mature and stable AGS were formed after 35 days of operation. In the aerobic sludge granulation process, the contents of protein (PN) and polysaccharide (PS) increased by 2.2 times and 3.1 times, respectively, which was conducive to maintaining the structural stability of granular sludge. As for the protein secondary structure, the relative content of β-sheets increased, indicating that the sludge hydrophobicity was enhanced, which was conducive to microbial aggregation and accelerated the aerobic sludge granulation process. The AGS system demonstrated the removal rates as high as 97.31% and 78.71% for COD and NH4+-N, respectively, and the main removal mechanism was that nutrients were assimilated and absorbed by microorganisms.
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