Treatment of TFT-LCD wastewater by hydrolysis acidification+ two-stage AO/MBR+ozone catalytic oxidation+BAF+air flotation process
This paper analyzed the wastewater treatment of a thin film transistor-liquid crystal display(TFT-LCD) manufacturer. In response to the complex composition, changes in water quality, high concentration of pollutants, poor biodegradability, and high discharge requirement, the wastewater was classifie...
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| Main Author: | |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Industrial Water Treatment
2024-10-01
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| Series: | Gongye shui chuli |
| Subjects: | |
| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2024-0062 |
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| Summary: | This paper analyzed the wastewater treatment of a thin film transistor-liquid crystal display(TFT-LCD) manufacturer. In response to the complex composition, changes in water quality, high concentration of pollutants, poor biodegradability, and high discharge requirement, the wastewater was classified into organic wastewater, acid/base wastewater, and fluorine-containing wastewater for collection and pre-treatment. After pretreatment, the three types of wastewater were mixed for further treatment. Based on the characteristics of the wastewater mixed after pretreatment, a combined process of hydrolysis acidification+two-stage AO/MBR+ozone catalytic oxidation+BAF(DN type)+air flotation+sodium hypochlorite disinfection was designed and developed. The results showed that the process was stable, the average effluent COD, BOD5, NH3-N, TP, TN, SS, F-, and total Cu during trial operation were 15, 2.1, 0.16, 0.13, 3.8, 2, 0.81, and 0.19 mg/L respectively. The effluent quality could meet the design requirements stably, with direct treatment cost of about 5.17 yuan/m3. |
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| ISSN: | 1005-829X |