芬顿调理对含铅工业污泥电渗透脱水减量效果的影响

吕航; 李佳旭; 黄烨; 熊巧; 吴旭

doi:10.12153/j.issn.1674-991X.20210390

芬顿调理对含铅工业污泥电渗透脱水减量效果的影响

doi: 10.12153/j.issn.1674-991X.20210390

吕航^1,,
李佳旭¹,
黄烨¹,
熊巧¹,
吴旭^{1, 2, ,}

1.
华中科技大学环境科学与工程学院
2.
湖北华德莱节能减排科技有限公司

基金项目: 国家重点研发计划项目（2020YFC1908704）

详细信息

作者简介:
吕航（1993—），男，博士后，主要研究方向为环境电化学，593818401@qq.com

通讯作者:
吴旭（1984—），男，教授，主要研究方向为环境电化学，profxuwu@hust.edu.cn

中图分类号: X705
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- HTML全文浏览量: 151
- PDF下载量: 17
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-07

Effect of Fenton conditioning on the reduction of lead-containing industrial sludge by electroosmotic dewatering

LÜ Hang^1
,,
LI Jiaxu¹,
HUANG Ye¹,
XIONG Qiao¹,
WU Xu^{1, 2
, ,}

1.
School of Environmental Science and Engineering, Huazhong University of Science and Technology
2.
Hubei Huadelai Energy Saving and Emission Reduction Technology Co., Ltd.

摘要

摘要:
针对铅酸电池厂含铅工业污泥难以脱水减量的问题，利用污泥中存在的Fe²⁺进行芬顿调理预处理，探究H₂O₂添加量对后续污泥电渗透脱水减量化效果的影响。结果表明：芬顿调理预处理会打破污泥中部分絮体，使污泥黏度由18.0 mPa·s降至4.7 mPa·s，污泥中部分无机离子在脱水过程中从污泥固相体系进入滤液中，造成后续电渗透脱水剩余泥饼的含水率由82.72%降至69.34%，挥发性悬浮物含量增加约30%。相对于原始污泥直接进行脱水，采用优化的H₂O₂添加量调理污泥可促进后续的污泥电渗透脱水减量66.20%，同时污泥干基中铅含量由265.2 g/kg提高到453.6 g/kg，这有利于污泥的后续资源化利用或无害化填埋处理。
- 含铅污泥 /
- 芬顿 /
- 电渗透脱水 /
- 污泥减量 /
- 重金属
Abstract:
Aiming at the difficulty of dewatering and realizing volume reduction of the lead-containing industrial sludge produced from lead-acid battery plants, Fe²⁺ in the sludge was used to perform Fenton preconditioning, and the effect of different dosages of hydrogen peroxide on the subsequent electroosmotic dewatering and reduction of the sludge was explored. The experimental results showed that the sludge pretreated by Fenton conditioning would break some of the flocs and reduce sludge viscosity from 18.0 mPa·s to 4.7 mPa·s. Part of the inorganic ions in the sludge left the solid phase system and entered the filtrate during the dewatering process, resulting in the water content of the subsequent electroosmotic dewatered sludge cake reducing from 82.72% to 69.34% and the content of volatile suspended solids increasing about 30%. Compared with the direct dewatering of the original sludge, the optimized H₂O₂ addition could promote the subsequent reduction of 66.20% of sludge by electroosmotic dewatering. At the same time, Pb content in the dry basis was increased from 265.2 g/kg to 453.6 g/kg, which was beneficial for the subsequent resource utilization or harmless landfill treatment of the sludge.
- lead-containing sludge /
- Fenton /
- electroosmotic dewatering /
- sludge reduction /
- heavy mental

HTML全文

图 1 污泥处理流程

Figure 1. Flow chart of sludge treatment

下载: 全尺寸图片幻灯片

图 2 剩余泥饼质量、污泥减量程度与H₂O₂添加量的关系

Figure 2. Relationship between residual sludge cake quality, sludge reduction degree and the amount of H₂O₂ added

下载: 全尺寸图片幻灯片

图 3 污泥调理后LSV扫描曲线及电渗透脱水过程电流和脱水质量变化

Figure 3. LSV scanning curve after sludge conditioning, electroosmotic dewatering process current and dewatering mass variation

下载: 全尺寸图片幻灯片

图 4 电渗透脱水剩余泥饼的含水率和VS/TS

Figure 4. Water content and VS/TS of electroosmosis dehydrated residual mud cake

下载: 全尺寸图片幻灯片

图 5 调理过程中过氧化氢和Fe²⁺浓度随时间的变化

Figure 5. H₂O₂ and Fe²⁺ concentration variation curve during the conditioning process

下载: 全尺寸图片幻灯片

图 6 不同调理条件下电渗透脱水后泥饼SEM形貌

Figure 6. SEM morphology of sludge cake after electroosmotic dewatering under different conditioning conditions

下载: 全尺寸图片幻灯片

表 1 污泥调理参数

Table 1. Sludge conditioning parameters

试验编号加入硫酸使污泥pH=3 H₂O₂添加量/（mg/mL）

SC0 不添加 0
SC1 添加 0
SC2 添加 8.82
SC3 添加 17.65
SC4 添加 35.29
SC5 添加 52.95

下载: 导出CSV

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