在没有有机碳的情况下,为废水同时进行化和脱的移动床生物反应器的过程优化
Roumi Bhattacharya1, Debabrata Mazumder1
1Civil Engineering Department, Indian Institute of Engineering Science and Technology, Shibpur, India.
Environmental technology
|June 22, 2023
概括
这项研究优化了从生物质中使用内部碳来源的移动床生物反应器的同时化和脱化 (SND). 35%的最佳载体填充比率实现了高废水的97.9%的SND效率.
科学领域:
- 环境生物技术 环境生物技术
- 废水处理工程 废水处理工程
- 微生物生态学 微生物生态学
背景情况:
- 移动床生物反应器 (MBBR) 通过同时化和脱 (SND) 有效地去除.
- 由于碳不足,低C/N比率的废水给SND带来了挑战,增加了外部碳添加的处理成本.
- 内源生物质降解为脱提供了一个可持续的,具有成本效益的内部碳来源.
研究的目的:
- 为了优化MBBR中的SND,利用内源碳来源.
- 调查操作参数 (溶解氧,负载,HRT,CFR) 对SND效率的影响.
- 在生物膜中识别涉及SND的微生物群落.
主要方法:
- 实验室规模的有氧移动床生物反应器 (MBBR) 设置用于连续处理.
- 研究不同的 (NH4-N) 度,载体填充率 (CFR) 和液压保留时间 (HRT).
- 控制溶解氧 (DO) 水平和温度,然后在生物膜中识别细菌物种.
主要成果:
- 有影响的NH4-N度对使用新型载体对SND效率的影响微不足道.
- 较高的加载率导致了酸盐的积累,表明不完全的脱化.
- 确定了35%的最佳CFR,在22小时HRT时达到97.9%的SND效率,在500mg/L NH4-N,受控的DO (5 mg/L) 和温度 (28°C) 下.
结论:
- 优化生物质含量和操作参数使得使用内源碳的可持续SND成为可能.
- 该研究表明,MBBR在挑战低C/N比率废水时具有高的SND效率.
- 生物膜分析证实了SND过程中必不可少的多种细菌 (固,化,脱) 的存在.
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