优化性预处理剂量,以减少废物活性污泥的分解,提高生物气生产产量
Nitesh Machhirake1, Deval Singh1, Bholu Ram Yadav1
1CSIR- National Environmental Engineering Research Institute (NEERI), Nehru Marg, Nagpur, 440020, Maharashtra, India.
Environmental research
|April 6, 2024
概括
优化性/酸性预处理显著提高了废物活性污泥 (WAS) 的无氧消化 (AD). 这一过程促进了生物气和甲的生产,为城市污水污泥管理提供了可持续的解决方案.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 城市人口的增加对市政污水污泥管理提出了重大挑战.
- 无氧消化 (AD) 是从废物活性污泥 (WAS) 中回收能源的关键技术.
- 有效的污泥预处理对于分解结构和改善水解和发酵至关重要.
研究的目的:
- 引入和评估一种结合性/酸性预处理工艺,以提高WAS的AD.
- 研究不同性试剂和剂量的对污泥消化效率的影响.
- 优化预处理条件以最大限度地提高生物气和甲生产.
主要方法:
- 研究了四种性试剂 (NaOH,Ca(OH) 2,Mg(OH) 2,KOH) 用于在环境温度下进行预处理.
- 多种剂量从0.04-0.12g/gTS,以评估对物理化学参数的影响.
- 在预处理的WAS样本上进行生物甲潜在试验 (BMPT).
主要成果:
- 优化的性/酸性预处理实现了18%-30%的总悬浮固体 (TSS) 减少.
- 观察到可溶化学氧需求 (sCOD) 增加了24% - 50%,这表明溶解性增强.
- 记录了244毫升/克 (A1) 和253毫升/克 (D1) 的最大甲 (CH4) 产量,突出了有效的预处理.
结论:
- 性/酸性预处理是一种可行的策略,可以提高污泥消化和生物气产量.
- 优化剂量对于最大限度地提高无氧消化效率至关重要.
- 这项研究为改善污泥管理和能源回收过程提供了宝贵的见解.
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