在中断脉冲电压下,污水污泥的电解水性能:方形形状和半正弦形状波形之间的比较
Wenyi Deng1, Xiaodan Xie1, Jie Zhou1
1School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Songjiang Dist., Shanghai, 201620, PR China.
Chemosphere
|May 8, 2024
概括
与正方形波 (SQW) 相比,半正方形波 (HSW) 脉冲电压电解水显著降低了污水污泥的水分含量. 在60%的工作周期下,HSW实现了最佳性能和能源效率.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 电化学 电化学 电化学
背景情况:
- 污水污泥排水对于减少处理量和成本至关重要.
- 脉冲电压电解水为高效的污泥处理提供了一个有希望的替代方案.
- 了解电压波形状和工作周期的影响是优化这一过程的关键.
研究的目的:
- 调查脉冲电压波形 (正方波与半正弦波) 和工作周期对污水污泥排水性能的影响.
- 为了比较SQW和HSW电气排水之间的排水效率,过质量和能源消耗.
- 用脉冲电压来确定污水污泥电气排水的最佳操作条件.
主要方法:
- 在污水污泥上进行了电气排水实验,使用正方波 (SQW) 和半正弦波 (HSW) 配置的脉冲电压.
- 对于每个波形,应用了不同的工作周期,以评估它们对脱水性能的影响.
- 测量和分析了脱水污泥的水分含量,过物的化学氧气需求 (COD) 和特定能耗.
主要成果:
- 在相当的平均电压下,HSW导致脱水污泥中的水分含量比SQW低10.3%-35.4%.
- 在SQW的80%工作周期和HSW的60%工作周期下观察到最佳的脱水性能.
- HSW 具有更高的破碎泥细胞/流体结构能力,其过物中COD 含量高出13%.
- 具体能源消耗范围在0.015-0.269千瓦时/公斤 (去除的水) 之间,并且与工作周期呈现出近乎线性关系.
结论:
- 半正弦波 (HSW) 脉冲电压在污水污泥排水方面比方波 (SQW) 更有效.
- 使用HSW的60%工作周期提供了除水性能和能源消耗之间的最佳平衡.
- 这些发现为脉冲电压电解水技术在污水污泥管理中的实际应用提供了宝贵的指导.
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