A/O/O和O/A/O对焦化废水中PAHs削减行为的影响

doi:10.11894/iwt.2019-0294

摘要/Abstract

摘要：

考察了A/O/O以及O/A/O两种工艺对PAHs削减行为的影响，分析发现A/O/O工艺对水相中总PAHs的去除率为95.85%，高于O/A/O工艺的88.50%；两种工艺中污泥均表现出对4环及以上PAHs的富集；A/O/O工艺对于高环PAHs（4环以上）的生物降解表现出更佳的效果；A/O/O工艺对于总PAHs削减能力为73.44%，高于O/A/O工艺的64.64%，说明A/O/O工艺在PAHs的削减方面要强于O/A/O工艺。

关键词: 焦化废水, A/O/O, O/A/O, PAHs, 削减行为

Abstract:

The effects of A/O/O and O/A/O treatment processes on the reduction behavior of PAHs were examined. The results showed that the removal efficiency of the total PAHs in the wastewater in the A/O/O process was 95.85%, which was higher than 88.50% of the O/A/O process. The sludge in both two processes showed concentration enrichment of the PAHs with four rings and above. The A/O/O process showed better results for the biodegradation of refractory high-ring PAHs(more than 4 rings). The PAHs reduction capability of the A/O/O process was 73.44% higher than 64.64% of O/A/O process, which indicated that the A/O/O process was greater than the O/A/O process in terms of PAHs reduction.

Key words: coking wastewater, A/O/O, O/A/O, PAHs, reduction behavior

中图分类号:

X703.1

马栋,周娜,贾媛,肖乃友. A/O/O和O/A/O对焦化废水中PAHs削减行为的影响[J]. 工业水处理, 2020, 40(3): 58-62.

Dong Ma,Na Zhou,Yuan Jia,Naiyou Xiao. The effects of A/O/O and O/A/O processes on the reduction behavior of PAHs in the treatment of coking wastewater[J]. Industrial Water Treatment, 2020, 40(3): 58-62.

https://www.iwt.cn/CN/Y2020/V40/I3/58

图/表 6

图1 A/O/O和O/A/O工艺流程

图2 A/O/O及O/A/O工艺进出水中10种PAHs的平均浓度

图3 A/O/O和O/A/O水相和泥相中10种PAHS的平均浓度分布

图4 A/O/O工艺与O/A/O工艺各单元水相和泥相中4类PAHs的平均浓度

表1 A/O/O与O/A/O工艺各工段中总PAHs含量 μg/L

工艺	进水	A池	O1池	O2池	外排泥	出水
A/O/O泥相	—	1 165.23	1 061.51	709.24	816.87	—
A/O/O水相	393.56	59.46	8.88	16.94	—	16.35
O/A/O泥相	—	117.46	430.28	1 481.54	574.86	—
O/A/O水相	149.16	131.86	222.98	39.15	—	17.15

图5 PAHs在两种工艺中的平均削减率

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