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| Effects of Trichlorophenol in Paper-making Wastewater on Toxicity of Anaerobic Granular Sludge |
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| DOI：10.11980/j.issn.0254-508X.2012.07.006 |
| Key Words:paper-making wastewater 2,4,6-TCP toxicity anaerobic granular sludge methanogenic activity |
| Author Name | Affiliation | | 王 艳1 | 1.华南理工大学环境科学与工程学院,广东广州,510640 | | 胡梦蝶1 | 1.华南理工大学环境科学与工程学院,广东广州,510640 | | 万金泉1,2 | 1.华南理工大学环境科学与工程学院,广东广州,510640；2.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 | | 马邕文1,2 | 1.华南理工大学环境科学与工程学院,广东广州,510640；2.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 |
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| Abstract:Methanogenic toxicity and methanogenic activity recovery experiments in different concentrations of 2,4,6-TCP in the paper-making wastewater were carried out. The results showed that the inhibition of methanogens was positively correlated with the concentration of 2,4,6-TCP, and the recovery of methanogenic activity was negatively correlated. It illustrated that 2,4,6-TCP is a type of fungicides. The effect of different concentrations of 2,4,6-TCP on the characteristics of domestic anaerobic granular sludge was studied. It proved that concentrations of 20 mg/L and 30 mg/L of 2,4,6-TCP promoted sludge granulation and accelerated the formation of large particles, increased the activity of granular sluge, due to the lack of nutrients, it formed a cavity, the sedimentation rate decreased. In the conditions of high concentration (20 mg/L and 30 mg/L) of 2,4,6-TCP, the main metabolic pathway was metabolic reductive dechlorination, so the amount of biomass increased. Furthermore, high concentration 2,4,6-TCP provided sufficient nutrients for reductive dechlorination and anaerobic microorganisms to increase biological activity, and the concentration of coenzyme also increased. In the situations of high concentration (20 mg/L and 30 mg/L) 2,4,6-TCP,bacterial decomposed and permeated to the extracellular, thus the total content of extracellular polymeric substance (EPS) increased. |
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