电絮凝-微纳米气泡臭氧氧化工艺处理高盐印染废水的研究

张亮; 周姝岑; 李攀; 陈文松

doi:10.12153/j.issn.1674-991X.20220043

电絮凝-微纳米气泡臭氧氧化工艺处理高盐印染废水的研究

doi: 10.12153/j.issn.1674-991X.20220043

张亮^1,,
周姝岑¹,
李攀^1, ,,
陈文松²

1.
同济大学环境科学与工程学院
2.
浙江天行健水务有限公司

基金项目: 国家重点研发计划（2021YFC3200805），国家自然科学基金面上项目（51978489）

详细信息

作者简介:
张亮（1997—），男，硕士研究生，主要从事水体污染研究，1044172527@qq.com

通讯作者:
李攀（1980—），女，副教授，主要从事微纳米气泡研究，lipan@tongji.edu.cn

中图分类号: X703
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出版历程
- 收稿日期: 2022-01-14

Study on treatment of high-salt printing and dyeing wastewater by electroflocculation-micro-nano-bubble ozone oxidation process

1.
College of Environmental Science and Engineering, Tongji University
2.
Zhejiang Tianxingjian Water Co., Ltd.

摘要

摘要:
高盐印染废水具有色度大、可生化性差、水质水量不稳定等特点，以致难以通过传统生化方法得到高效处理。将微纳米气泡臭氧（O₃）高级氧化工艺与电絮凝（EC）工艺组合处理高盐印染废水，探究2种工艺的耦合作用，并研究电流密度、盐浓度、pH等因素对组合工艺处理效果的影响。结果表明，单独EC法处理印染废水在一定程度有脱色和去除有机物的效果，但效率低。在相同条件下，EC和O₃同时处理(EC+O₃)150 min与EC处理30 min后再经O₃处理120 min (EC→O₃)过程相比，EC+O₃处理印染废水的效率更高，去除1 mg COD消耗的O₃仅为0.46~1.39 mg。随着电流密度和pH的升高，EC+O₃工艺的色度、UV₂₅₄、COD和TOC去除率增加；盐浓度的增加对色度、UV₂₅₄、COD和TOC去除率影响不大。比较了O₃微纳米气泡工艺、高级氧化法H₂O₂/O₃、EC+O₃ 3种方法对新疆和浙江实际印染废水的处理效果，并进行了经济性分析。3种微纳米气泡处理工艺的单位污染物电能消耗量（EE/O）由低到高为EC+O₃ < H₂O₂/O₃ < O₃。
- 微纳米气泡 /
- 臭氧氧化 /
- 电絮凝 /
- 印染废水
Abstract:
High-salt printing and dyeing wastewater has the characteristics of high chromaticity, poor biodegradability and unstable water quality, which makes it difficult to be treated efficiently by traditional biochemical methods. Micro-nano-bubble ozone (O₃) advanced oxidation process and electric flocculation (EC) process were combined to treat high-salt printing and dyeing wastewater, the coupling effect of the two processes was explored, and the influence of current density, salt concentration, pH and other factors on the treatment effect of the combined process was studied. The experimental results showed that EC alone could decolorize dyeing wastewater and remove organic matter to a certain extent, but the efficiency was low. Under the same conditions, the treatment efficiency of printing and dyeing wastewater by EC+O₃ process was higher than that by EC→O₃ process (EC treatment for 30 min→O₃ treatment for 120 min), and the ozone consumed by removing 1 mg COD was 0.46-1.39 mg. With the increase of current density and pH, the decolorization rate, UV₂₅₄, COD and TOC removal rate increased. With the increase of salt concentration, the decolorization rate, UV₂₅₄, COD and TOC removal rate increased slightly. The effects of ozone micro-nano-bubble process, H₂O₂/O₃ of advanced oxidation process and EC+O₃ processes on the treatment of actual printing and dyeing wastewater in Xinjiang and Zhejiang were compared, and the economic analysis was carried out. The electrical energy per order (EE/O) value of each stage of the three micro-nano-bubble treatment processes was EC+O₃ < H₂O₂/O₃ < O₃ from low to high.
- micro-nano-bubble /
- ozone oxidation /
- electrocoagulation /
- printing and dyeing wastewater

HTML全文

图 1 电絮凝-微纳米气泡臭氧氧化装置

Figure 1. Electroflocculation-micro-nano-bubble ozonation oxidation device

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图 2 EC处理印染废水的色度、UV₂₅₄、COD、TOC去除率

Figure 2. Chromaticity, UV₂₅₄, COD and TOC removal rate of printing and dyeing wastewater treated by EC process

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图 3 EC→O₃工艺中不同EC处理时间下印染废水的色度、UV₂₅₄、COD、TOC去除率的变化

Figure 3. Change of chromaticity, UV₂₅₄, COD and TOC removal rate of printing and dyeing wastewater under different EC treatment time in EC→O₃ process

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图 4 EC+O₃过程中色度、UV₂₅₄、COD、TOC去除率及O/C的变化

Figure 4. Change of chromaticity, UV₂₅₄, COD, TOC removal rate and O/C of EC+O₃ process

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图 5 电流密度对色度、UV₂₅₄、COD、TOC去除率的影响

Figure 5. Effect of current density on chromaticity, UV₂₅₄, COD and TOC removal rate

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图 6 电流密度对O/C的影响

Figure 6. Effect of current density on O/C

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图 7 NaCl浓度对色度、UV₂₅₄、COD、TOC去除率和O/C的影响

Figure 7. Effect of NaCl concentration on chromaticity, UV₂₅₄, COD, TOC removal rate and O/C rate

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图 8 pH对色度、UV₂₅₄、COD、TOC去除率和O/C的影响

Figure 8. Effect of pH on chromaticity, UV₂₅₄, COD, TOC removal rate and O/C

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图 9 微纳米气泡臭氧及其组合工艺处理新疆实际印染废水的色度、UV₂₅₄、COD、TOC去除率及O/C变化

Figure 9. Change of chromaticity, UV₂₅₄, COD, TOC removal rate and O/C of micro-nano-bubbles ozone and its combined process to treat actual printing and dyeing wastewater from Xinjiang

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表 1 不同指标检测所用的仪器

Table 1. Detection instruments for different detection indexes

检测指标	仪器名称	型号	生产厂家
气体臭氧浓度	气相臭氧浓度检测仪	Model600	HARE
气体流量	气体质量流量计	ELP-200	Jitsugyo
TOC	总有机碳分析仪	TOC-L CPH	Shimadzu
pH	pH 酸度计	FE20	梅特勒-托利多仪器有限公司
UV₂₅₄、 COD	紫外-可见分光光度计	DR6000	Hach
色度	高效液相色谱仪	Acquity	Waters

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表 2 实际废水水质特征

Table 2. Water quality characteristics of actual wastewater

废水来源	pH	电导率/ (mS/cm)	色度	COD/ (mg/L)	TOC浓度/ (mg/L)
新疆	7.80	63.20	26.4	1 510	922.0
浙江	8.43	31.79	27.3	1 070	464.3

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表 3 O₃、H₂O₂/O₃和EC+O₃工艺的操作参数与EE/O

Table 3. Operating parameters and EE/O for O₃, H₂O₂/O₃ and EC+O₃ processes

废水来源	工艺	电压/V	电流/A	lg(C_init/C_fin)	(EE/O)/ (kW·h/m³)
新疆	O₃	220	1.746	0.0613	2.09
	H₂O₂/O₃	220	1.746	0.0709	1.81
	EC	6.90	3.000	0.0887	0.08
	O₃	220	1.746	0.0887	1.44
	EC+O₃				1.52
浙江	O₃	220	1.746	0.0960	1.33
	H₂O₂/O₃	220	1.746	0.1130	1.13
	EC	6.20	3.000	0.1330	0.05
	O₃	220	1.746	0.1330	0.96
	EC+O₃				1.01

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