Comprehensive treatment method for high-concentration aldehyde acrylic wastewater
A technology for comprehensive treatment of aldehyde-containing acrylic acid, which is applied in the field of comprehensive treatment of high-concentration aldehyde-containing acrylic acid wastewater, can solve problems such as microbial obstruction, poisoning, and impact on biological treatment effects, and achieve improved biochemical properties, wide application range, and good adaptability Effects on sex and stability
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Embodiment 1
[0016] Taking the acrylic acid wastewater from a factory as the target treatment water for experimental application, the wastewater was firstly analyzed for aldehydes, and it was divided into two categories based on whether it contained α-H. The analysis results showed that the aldehydes containing α-H The content is greater than the content of the two types of aldehydes that do not contain α-H. The specific water quality is shown in Table 1:
[0017] Control the reaction temperature at 95°C, slowly add alkaline earth metal (sodium hydroxide and calcium hydroxide ratio 1:2) to adjust the system pH=13, and the reaction time is 0.5h. After the dealdehyde treatment, the pH of the wastewater was adjusted to 7.0, and the UASB-ASP two-stage biological method was used for treatment. The treatment effects of each unit are listed in Table 2:
[0018] Table 1 Water quality table of raw water
[0019]
[0020] Table 2 process treatment effect
[0021]
[0022] It can be se...
Embodiment 2
[0024] Select the actual high-concentration aldehyde-containing acrylic acid wastewater from a certain company for process research. First, conduct a full analysis of aldehydes in the wastewater, and divide them into two categories based on whether they contain α-H. For specific water quality, see Table 3 below:
[0025] Table 3 Water quality of raw water
[0026]
[0027] Control the reaction temperature at 60°C, and slowly add sodium hydroxide to adjust the pH of the system to 10. After a reaction time of 5 hours, the residual total aldehyde content in the wastewater is detected to be 29.9 mmol, and the molar ratio of residual aldehyde to calcium hydroxide is 3:1. , control the reaction temperature to 50°C, and the reaction time to 6h. The specific process treatment effect is shown in Table 4:
[0028] Table 4 combined process treatment effect
[0029] Effluent water quality analysis
[0030] It can be seen from the above table that after dealdehyde treatment,...
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