亚铁-过二硫酸盐法深度氧化造纸废水工艺研究

doi:10.11894/iwt.2020-0083

摘要/Abstract

摘要：

采用正交实验方法，探讨了过二硫酸盐用量、硫酸亚铁用量、初始pH及反应时间4个工艺参数对亚铁-过二硫酸盐法深度氧化处理造纸废水（二级生化出水）效果的影响。结果表明：过二硫酸盐用量为436 mg/L，亚铁用量为654 mg/L，原水基础上微调或不调初始pH，反应30 h，为处理效果最优工艺条件。经亚铁-过二硫酸盐法处理后上清液COD_Cr去除率可达90%，色度去除率可达97%。与Fenton法相比，亚铁-过二硫酸盐法在处理效果及经济成本上具有明显优势，应用前景良好。

关键词: 造纸废水, 亚铁, 过二硫酸盐, 深度氧化

Abstract:

The effects of four process parameters including persulfate content, ferrous sulfate content, initial pH, and reaction time on the effect of ferrous-persulfate method for deep oxidation treatment of papermaking wastewater(secondary biochemical effluent) were investigated using orthogonal experiments. The results showed that the optimum process was obtained under the condition of ferrous-persulfate dosage 436 mg/L, ferrous 654 mg/L, with or without adjusting the initial pH based on raw water and the reaction was performed for 30 h. After the ferrous-persulfate treatment, the COD_Cr removal rate of the supernatant was up to 90%, and the chroma removal rate could reach 97%. Compared with Fenton method, it has obvious advantages in processing effect and economic cost, and has a good application prospect.

Key words: papermaking wastewater, ferrous, persulfate, deep oxidation

中图分类号:

X703

解玉佳,李群. 亚铁-过二硫酸盐法深度氧化造纸废水工艺研究[J]. 工业水处理, 2020, 40(12): 45-49.

Yujia Xie,Qun Li. Study on the process of deep oxidation treatment of papermaking wastewater by ferrous-persulfate method[J]. Industrial Water Treatment, 2020, 40(12): 45-49.

https://www.iwt.cn/CN/Y2020/V40/I12/45

图/表 8

参考文献 16

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项目	色度/度	COD_Cr/（mg·L^-1）	pH	悬浮物/（mg·L^-1）	盐/（mg·L^-1）
数值	545	218	8.15	106	1 500

项目	色度/度	COD_Cr/（mg·L^-1）	pH	悬浮物/（mg·L^-1）	盐/（mg·L^-1）
数值	545	218	8.15	106	1 500

因素	水平
因素	1	2	3	4
A（Na₂S₂O₈用量）/（mg·L^-1）	109	218	436	872
B（FeSO₄·7H₂O用量）/（mg·L^-1）	218	654	1 090	1 526
C（反应时间）/h	6	18	30	42
D（pH）	2	5.5	9	12.5

因素	水平
因素	1	2	3	4
A（Na₂S₂O₈用量）/（mg·L^-1）	109	218	436	872
B（FeSO₄·7H₂O用量）/（mg·L^-1）	218	654	1 090	1 526
C（反应时间）/h	6	18	30	42
D（pH）	2	5.5	9	12.5

项目	A/（mg·L^-1）	B/（mg·L^-1）	C/h	D	色度去除率/%	COD_Cr去除率/%
1	109	218	6	2	76	71
2	109	654	18	5.5	87	78
3	109	1 090	30	9	76	74
4	109	1 526	42	12.5	62	74
5	218	218	18	9	77	83
6	218	654	6	12.5	81	85
7	218	1 090	42	2	84	77
8	218	1 526	30	5.5	80	78
9	436	218	30	12.5	86	84
10	436	654	42	9	88	88
11	436	1 090	6	5.5	92	86
12	436	1 526	18	2	87	80
13	872	218	42	5.5	97	86
14	872	654	30	2	96	90
15	872	1 090	18	12.5	82	81
16	872	1 526	6	9	73	73

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