Evaluation of the detoxification efficiencies of coking wastewater treated by combined anaerobic-anoxic-oxic (A 2 O) and advanced oxidation process

Na, Chunhong; Zhang, Ying; Quan, Xie; Chen, Shuo; Liu, Wei; Zhang, Yaobin

doi:10.1016/j.jhazmat.2017.05.037

Cited by 60 publications

(15 citation statements)

References 42 publications

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“…The only exception was the QD that used the A 2 /O + MBR process. The good removal efficiency of A 2 /O -based process could also be reported in the literatures 33,34 . For example, Shi et al .…”

Section: Resultssupporting

confidence: 73%

Comparative analysis of toxicity reduction of wastewater in twelve industrial park wastewater treatment plants based on battery of toxicity assays

Jiang

et al. 2019

Sci Rep

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Wastewater treatment plants (WWTPs) in industrial parks provide centralized treatment for industrial and domestic wastewater. However, the information on toxicity reduction of wastewater and its correlation with treatment process in industrial park is limited. This study compared the toxicity reduction of wastewater in 12 industrial park WWTPs based on battery of toxicity assays. Nine toxic endpoints involving microorganism, phytoplankton, zooplankton, plant and human cell lines were applied. All the influents of WWTPs induced high toxicities, which were significantly reduced after the treatments from 7 of the studied WWTPs. However, the effluents of five WWTPs induced higher toxicity in one or more toxic endpoints compared to the influents. This study also found that most of anaerobic-anoxic-oxic (A 2 /O)-based processes had good removal efficiency of wastewater toxicity, while the sequencing batch reactor (SBR)-based processes had the lowest removal efficiency. Moreover, low correlation coefficients were obtained among all toxic endpoints, indicating that battery of toxicity assays was necessary to completely characterize the toxicity and risk of wastewater in industrial parks. This study shed new lights to the toxicity reduction of wastewater and its correlation with treatment process, which is very useful for the design, management and operation of WWTPs in industrial parks.

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Section: Resultssupporting

confidence: 73%

Comparative analysis of toxicity reduction of wastewater in twelve industrial park wastewater treatment plants based on battery of toxicity assays

Jiang

et al. 2019

Sci Rep

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“…The study highlighted the necessity of monitoring the toxicity degree of coking wastewater. In another study (Na et al 2017), the raw coking wastewater exhibited acute toxicity to aquatic ecosystems accompanied by genotoxicity. The anaerobic-anoxic-oxic biological treatment removed the fish and embryotoxicity but was unsuccessful in removing the genotoxicity.…”

Section: Complexity and Toxicity Of Coking Wastewatermentioning

confidence: 96%

“…Therefore, coking wastewater must be treated properly to reduce its adverse impacts on the environment and human health. But even after meeting the discharge standards, coking wastewater still shows some potential risk to the environment in the form of genotoxicity (Na et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Advances in treatment of coking wastewater – a state of art review

Tamang

Paul

2021

Water Science and Technology

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Coking wastewater poses a serious threat to the environment due to the presence of a wide spectrum of refractory substances such as phenolic compounds, polycyclic aromatic hydrocarbons and heterocyclic nitrogenous compounds. These toxic substances are difficult to treat using conventional treatment methods alone. In recent years much attention has been given to the effective treatment of coking wastewater. Thus, this review seeks to provide a brief overview of recent developments that have taken place in the treatment of coking wastewater. In addition, this article addresses the complexity and the problems associated with treatment followed by a discussion on biological methods with special focus on bioaugmentation. As coking wastewater is refractory in nature, some of the studies have been related to improving the biodegradability of wastewater. The final section focuses on the integrated treatment methods that have emerged as the best solution for tackling the highly unmanageable coking wastewater. Attention has also been given to emerging microwave technology which has tremendous potential for treatment of coking wastewater.

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“…On the contrary, previous study showed that the prefix anaerobic bioreactor of traditional treatment processes had limited pollutant removal efficiency. One such example is the A/A/O treatment process that had low pollutant removal efficiency and the effluent quality did not meet the wastewater discharge standard in China [25]. Some literatures also reported below 35.00% COD removal by mesophilic anaerobic treatment [13,26,27].…”

Section: Plos Onementioning

confidence: 99%

Diversity and functional prediction of microbial communities involved in the first aerobic bioreactor of coking wastewater treatment system

et al. 2020

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The pre-aerobic process of coking wastewater treatment has strong capacity of decarbonization and detoxification, which contribute to the subsequent dinitrogen of non-carbon source/heterotrophic denitrification. The COD removal rate can reach > 90% in the first aerobic bioreactor of the novel O/H/O coking wastewater treatment system during long-term operation. The physico-chemical characteristics of influent and effluent coking wastewater in the first aerobic bioreactor were analyzed to examine how they correlated with bacterial communities. The diversity of the activated sludge microbial community was investigated using a culture-independent molecular approach. The microbial community functional profiling and detailed pathways were predicted from the 16S rRNA gene-sequencing data by the PICRUSt software and the KEGG database. High-throughput MiSeq sequencing results revealed a distinct microbial composition in the activated sludge of the first aerobic bioreactor of the O/H/O system. Proteobacteria, Bacteroidetes, and Chlorobi were the decarbonization and detoxification dominant phyla with the relative abundance of 84.07 ± 5.45, 10.89 ± 6.31, and 2.96 ± 1.12%, respectively. Thiobacillus, Rhodoplanes, Lysobacter, and Leucobacter were the potential major genera involved in the crucial functional pathways related to the degradation of phenols, cyanide, benzoate, and naphthalene. These results indicated that the comprehensive understanding of the structure and function diversity of the microbial community in the bioreactor will be conducive to the optimal coking wastewater treatment.

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Evaluation of the detoxification efficiencies of coking wastewater treated by combined anaerobic-anoxic-oxic (A 2 O) and advanced oxidation process

Cited by 60 publications

References 42 publications

Comparative analysis of toxicity reduction of wastewater in twelve industrial park wastewater treatment plants based on battery of toxicity assays

Comparative analysis of toxicity reduction of wastewater in twelve industrial park wastewater treatment plants based on battery of toxicity assays

Advances in treatment of coking wastewater – a state of art review

Diversity and functional prediction of microbial communities involved in the first aerobic bioreactor of coking wastewater treatment system

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