Is A/A/O process effective in toxicity removal? Case study with coking wastewater

Liu, Shi; Dong, Wang; Cao, Di; Na, Chunhong; Quan, Xie; Zhang, Ying

doi:10.1016/j.ecoenv.2017.04.034

Cited by 16 publications

(2 citation statements)

References 25 publications

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“…For example, Shi et al . found that the A 2 /O -based process was efficient in acute toxicity removal of coking wastewater 35 . The A 2 /O -based processes might be good choice to reduce the toxicity of industrial wastewater.…”

Section: Resultsmentioning

confidence: 98%

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: Resultsmentioning

confidence: 98%

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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“…A remoção de toxicidade em UT obtidas pelos reatores deste trabalho foi maior do que os encontrados na literatura. Shi et al (2017) avaliaram o tratamento de efluentes da produção de coque em um reator anaeróbio e reportaram que a toxicidade aguda avaliada com Daphnia magna diminuiu de 32,3 a 2,9 UT. Em um estudo similar, Deng et al (2017) observaram que a toxicidade aguda avaliada com D. magna diminuiu de 13,5 a 4,5 UT após tratamento de efluentes da indústria de pigmentos.…”

Section: Remoção Da Toxicidadeunclassified

Tratamento anaeróbio de efluentes em reatores de alta taxa

Garay¹

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Aos meus pais, meus pilares, Felipe e Beatriz, que sempre apoiaram as minhas decisões e confiaram em mim, agradeço tudo. Aos meus irmãos, meus ídolos, Daniel e Erika, que são a força para continuar. Ao prof. Flávio e à profa. Teresa, agradeço a oportunidade e a confiança para desenvolver o mestrado. Ao meu parceiro de laboratório, Felipe, que sempre esteve disposto para ajudar. Aos técnicos da ETE, Brandão e Manoel, que sempre torceram para que os experimentos tenham resultados positivos. Ao time do laboratório e grupo de pesquisa pelo apoio nas atividades de laboratório e por harmonizar o ambiente de trabalho. Aos meus amigos que fizeram de Lorena um lar e com os quais tenho lembranças memoráveis.

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Seasonal dynamics of bacterial composition and functions in biological treatment of coking wastewater

Tan,

Chen,

Guo

et al. 2024

Appl Microbiol Biotechnol

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Seasonal dynamics of bacterial composition and functions were demonstrated for the biological fluidized-bed bioreactors combined in the anoxic/aerobic1/aerobic2 (AOO) coking wastewater (CWW) treatment sequences. The bacterial composition and functions in the CWW activated sludge samples were revealed by 16S rRNA genes amplicon sequencing. Thiobacillus, Cloacibacterium, Alkaliphilus and Pseudomonas were determined as core genera with seasonal changes. Mutable microbial community composition fluctuated in different seasons in same bioreactor. Distributions of predicted KEGG pathways along four seasons consistently demonstrated enrichment in biodegradation of carbon- and nitrogen-containing compounds. The major contaminants were removed from CWW by biochemical pathway of xenobiotics biodegradation and metabolism. This Level 2 pathway mainly owned the Level 3 pathways of benzoate degradation, drug metabolism-other enzymes, drug metabolism-cytochrome P450, metabolism of xenobiotics by cytochrome P450, and aminobenzoate degradation. The RDA results showed that dissolved oxygen with seasonal fluctuation was the main parameter shaping the microbial community. The observed dynamics within the microbial community composition, coupled with the maintained stability of CWW treatment efficiencies and a consistent profile of microbial functional pathways, underscore the presence of functional redundancy in the AOO bioreactors. The study underscored stable and effective operational performances of bioreactors in the AOO sequences, contributing the knowledge of microbiological basics to the advancement of CWW biological treatment. Key points • Seasonal fluctuations of bacterial composition described for the AOO system. • Seasonal distributions of metabolic functions focused on carbon and nitrogen removal. • Functional redundancy was revealed in the AOO microbial community. Supplementary information The online version contains supplementary material available at 10.1007/s00253-024-13274-4.

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Is A/A/O process effective in toxicity removal? Case study with coking wastewater

Cited by 16 publications

References 25 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

Tratamento anaeróbio de efluentes em reatores de alta taxa

Seasonal dynamics of bacterial composition and functions in biological treatment of coking wastewater

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