Advanced treatment method for production waste water of acrylic acid and ester device
A technology for production wastewater and advanced treatment, which is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve problems such as accelerated membrane damage, high membrane cost, and easy clogging of reverse osmosis membranes. , to achieve the effect of improving biodegradability, improving treatment efficiency and load
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Embodiment 1
[0025] Acrylic acid used in the present embodiment and ester plant wastewater water quality situation Table 1:
[0026] Table 1 Water quality of wastewater from acrylic acid and ester plant
[0027] pH
[0028]Firstly, the wastewater from the acrylic acid and ester plant is dealdehydeized, the reaction temperature is controlled at 95°C, and alkaline earth metal (sodium hydroxide and calcium hydroxide ratio 1:2) is slowly added to adjust the pH of the system to 13, and the reaction time is 0.5h. Add coagulant polyferric sulfate 300mg / L to the effluent after dealdehyde treatment, residence time 5min, G value 550S -1 , add 3mg / L coagulant PAM, the velocity gradient is 200S -1 Weaken to 20S -1 , hydraulic retention time 20min, solid-liquid separation time 0.5h. After the wastewater is pretreated, the organic load of the influent is controlled to be 12.0kgCOD Cr / m 3 d, using two-stage EGSB (granular sludge property parameters 57-69gVSS / L, particle size 0.2-5.0mm, pH...
Embodiment 2
[0033] Table 3 between the acrylic acid and ester plant waste water quality situation that adopts in the present embodiment:
[0034] Table 3 Water quality of wastewater from acrylic acid and ester plant
[0035] pH
COD Cr
TOC
BOD 5
B / C
Total aldehyde
3.9
35217
14972.0
23
0.0015
6512
7891
[0036] Firstly, the wastewater from the acrylic acid and ester plant is dealdehydeized, the reaction temperature is controlled at 45°C, and alkaline earth metal (sodium hydroxide and calcium hydroxide ratio 1:2) is slowly added to adjust the pH of the system to 13, and the reaction time is 12h. Add coagulant polyferric sulfate 300mg / L to the effluent after dealdehyde treatment, residence time 5min, G value 550S -1 , add 3mg / L coagulant PAM, the velocity gradient is 200S -1 Weaken to 20S -1 , hydraulic retention time 20min, solid-liquid separation time 0.5h. After the wastewater is pretr...
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