烟煤掺混对污泥电脱水性能的影响

doi:10.16085/j.issn.1000-6613.2023-2258

化工进展 ›› 2024, Vol. 43 ›› Issue (4): 2144-2152.DOI: 10.16085/j.issn.1000-6613.2023-2258

• 资源与环境化工 • 上一篇

烟煤掺混对污泥电脱水性能的影响

莎莉¹^,²(), 苏莹嘉³, 凌子琛³, 于晓艳⁴, 李书鹏¹^,², 郭丽莉¹^,², 熊静¹^,², 房连虎¹, 张冉¹^,², 张书廷³()

^1.北京建工环境修复股份有限公司，北京 100015
^2.污染场地安全修复技术国家工程实验室，北京 100015
^3.天津大学环境科学与工程学院，天津 300354
^4.太原工业学院环境与安全工程系，山西太原 030013

收稿日期:2023-12-25 修回日期:2024-02-04 出版日期:2024-04-15 发布日期:2024-05-13
通讯作者: 张书廷
作者简介:莎莉（1992—），女，博士，研究方向为固废处理处置与资源化技术、土壤污染修复与治理。E-mail: sunnyshali@qq.com。
基金资助:
来晋工作优秀博士科研资助项目(2022LJ006)

Effect of bituminous coal mixing on the electro-dewatering performance of sludge

SHA Li¹^,²(), SU Yingjia³, LING Zichen³, YU Xiaoyan⁴, LI Shupeng¹^,², GUO Lili¹^,², XIONG Jing¹^,², FANG Lianhu¹, ZHANG Ran¹^,², ZHANG Shuting³()

^1.Beijing Construction Engineering Group Environmental Remediation Co. , Ltd. , Beijing 100015, China
^2.National Engineering Laboratory for Site Remediation Technologies, Beijing 100015, China
^3.School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
^4.Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030013, Shanxi, China

Received:2023-12-25 Revised:2024-02-04 Online:2024-04-15 Published:2024-05-13
Contact: ZHANG Shuting

摘要/Abstract

摘要：

为推进污泥焚烧资源化利用进程，本文采用烟煤对活性污泥进行掺混，然后对掺混污泥的电脱水性能进行了研究，考察了掺混污泥在电脱水过程中的理化性质、有机性质和低位热值的变化。结果表明：污泥的脱水量随烟煤掺混量的增加呈先增大后减小的趋势。最佳煤粉掺混量50%污泥干重时，掺混污泥的含水率由81%±0.8%降至50.1%±0.6%，脱水时间较无掺混缩短30.8%；烟煤掺混可提高泥饼的电导率和欧姆热效应，从而提高脱水效率。污泥含水率与亲水性氨基酸苏氨酸、丝氨酸、组氨酸、谷氨酸及疏水性氨基酸缬氨酸的含量呈高度相关（|r|>0.883，p<0.05）。烟煤掺混后电脱水可降低泥饼亲水性氨基酸和含氧官能团含量，提高污泥疏水性能。掺混污泥电脱水后泥饼的低位热值较无掺混电脱水处理提高60%以上，有助于后续污泥和煤混烧资源化利用。

关键词: 污泥, 电渗透, 脱水性能, 干燥, 资源化, 环境

Abstract:

To promote the process of resource utilization of sludge incineration, this article used bituminous coal to mix activated sludge, and then the electro-dewatering performance of the mixed sludge was studied. The variations of physical and chemical properties, organic properties, and low calorific value of mixed sludge during the electro-dewatering process were examined. The results showed that the dewatering content of sludge first increased and then decreased with the increase in bituminous coal dosage. When the optimal coal dosage was 50%DS, the moisture content of the mixed sludge decreased from 81%±0.8% to 50.1%±0.6%, and the dewatering time was shortened by 30.8% compared to no-mixed sludge. Mixing bituminous coal could improve the conductivity and Ohmic heating effect of sludge, thereby improving the dewatering efficiency. The moisture content of sludge was highly correlated with the content of hydrophilic amino acids such as threonine, serine, histidine, glutamic acid, and hydrophobic amino acids such as valine (|r|>0.883, p<0.05). Electro-dewatering after mixing bituminous coal could reduce the content of hydrophilic amino acids and oxygen-containing functional groups in the sludge cake, improving the hydrophobicity of the sludge. After the electro-dewatering of mixed sludge, the low calorific value of sludge cake was increased by more than 60% compared to the no-mixed electro-dewatering treatment. This result was helpful for the subsequent resource utilization of mixed combustion of sludge and coal.

Key words: sludge, electro-osmosis, dewaterability, drying, resource utilization, environment

中图分类号:

X705

莎莉, 苏莹嘉, 凌子琛, 于晓艳, 李书鹏, 郭丽莉, 熊静, 房连虎, 张冉, 张书廷. 烟煤掺混对污泥电脱水性能的影响[J]. 化工进展, 2024, 43(4): 2144-2152.

SHA Li, SU Yingjia, LING Zichen, YU Xiaoyan, LI Shupeng, GUO Lili, XIONG Jing, FANG Lianhu, ZHANG Ran, ZHANG Shuting. Effect of bituminous coal mixing on the electro-dewatering performance of sludge[J]. Chemical Industry and Engineering Progress, 2024, 43(4): 2144-2152.

图/表 14

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参数指标	测试值
含水率	86.5%±0.6%
挥发性固体	50.6%±1.8%
pH	6.9±0.5
电导率	(263±18)μS/cm
温度	(4.3±0.4)℃

参数指标	测试值
含水率	86.5%±0.6%
挥发性固体	50.6%±1.8%
pH	6.9±0.5
电导率	(263±18)μS/cm
温度	(4.3±0.4)℃

掺混方案	电脱水污泥含水率/%	阳极泥含水率/%	阴极泥含水率/%
无掺混	63.3±0.5	57.5±1.6	69.0±1.2
烟煤掺混	50.1±0.6	43.4±0.4	60.7±0.6

掺混方案	电脱水污泥含水率/%	阳极泥含水率/%	阴极泥含水率/%
无掺混	63.3±0.5	57.5±1.6	69.0±1.2
烟煤掺混	50.1±0.6	43.4±0.4	60.7±0.6

掺混方案	电脱水污泥电导率/μS·cm^-1	最高泥饼温度/℃
无掺混	240±22	43.8±0.4
烟煤掺混	504±30	56.1±0.4

烟煤掺混对污泥电脱水性能的影响

Effect of bituminous coal mixing on the electro-dewatering performance of sludge

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参考文献 31

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氨基酸	原泥/%	无掺混- 阳极泥/%	无掺混- 阴极泥/%	烟煤掺混-阳极泥/%	烟煤掺混-阴极泥/%
亲水性氨基酸	42.8	25.1	24.3	13.8	21.1
疏水性氨基酸	57.2	74.9	75.7	86.2	78.9

亲水性氨基酸	相关系数	疏水性氨基酸	相关系数
天冬氨酸	0.868	丙氨酸	0.937
苏氨酸	0.943^①	缬氨酸	-0.889^①
丝氨酸	0.970^②	蛋氨酸	-0.858
谷氨酸	0.885^①	异亮氨酸	-0.853
甘氨酸	0.858	亮氨酸	-0.552
半胱氨酸	0.126	酪氨酸	-0.742
组氨酸	0.883^①	苯丙氨酸	0.331
赖氨酸	0.875	脯氨酸	0.367
精氨酸	0.624

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