Method for treating industrial wastewater by using MBBR (Moving Bed Biofilm Reactor) process
An industrial wastewater and process technology, applied in chemical instruments and methods, special compound water treatment, biological water/sewage treatment, etc., can solve problems such as poor filtration effect, membrane fouling, blocking membrane pores, etc. The effect of enhancing filtration and stabilizing effluent quality
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Embodiment 1
[0028] The amphoteric monomer comprises the following steps:
[0029] Add N,N-dimethylethanolamine and methyl methacrylate into a three-necked flask, add phenothiazine and 2-mercaptobenzothiazole sequentially under constant stirring, stop stirring and slowly raise the temperature to 95°C, distill methanol and excess Methyl methacrylate, react for 4h, then reduce the pressure to 40kPa, distill off the remaining methyl methacrylate, then reduce the pressure to 1.5kPa, fractionally distill the product at 80°C, which is intermediate 1, control N,N-di The weight ratio of methylethanolamine and methyl methacrylate is 1:5, the consumption of phenothiazine is 1.5% of the weight of methyl methacrylate, and the consumption of 2-mercaptobenzothiazole is 1% of the weight of methyl methacrylate. %;
[0030] Add the prepared intermediate 1 into deionized water, stir at a constant speed for 5 minutes, adjust the pH to 7, then add phenothiazine, stir at a constant speed and feed in methyl ch...
Embodiment 2
[0033] The amphoteric monomer comprises the following steps:
[0034]Add N,N-dimethylethanolamine and methyl methacrylate into a three-necked flask, add phenothiazine and 2-mercaptobenzothiazole sequentially under constant stirring, stop stirring and slowly raise the temperature to 100°C, distill methanol and excess Methyl methacrylate, react for 4h, then reduce the pressure to 40kPa, distill off the remaining methyl methacrylate, then reduce the pressure to 1.5kPa, fractionally distill the product at 80°C, which is intermediate 1, control N,N-di The weight ratio of methylethanolamine and methyl methacrylate is 1:5, the consumption of phenothiazine is 2.5% of the weight of methyl methacrylate, and the consumption of 2-mercaptobenzothiazole is 1.5% of the weight of methyl methacrylate. %;
[0035] Add the prepared intermediate 1 into deionized water, stir at a constant speed for 5 minutes, adjust the pH to 7, then add phenothiazine, stir at a constant speed and feed in methyl ...
Embodiment 3
[0038] The amphoteric monomer comprises the following steps:
[0039] Add N,N-dimethylethanolamine and methyl methacrylate into a three-necked flask, add phenothiazine and 2-mercaptobenzothiazole sequentially under constant stirring, stop stirring and slowly raise the temperature to 105°C, distill off methanol and excess Methyl methacrylate, react for 4h, then reduce the pressure to 40kPa, distill off the remaining methyl methacrylate, then reduce the pressure to 1.5kPa, fractionally distill the product at 80°C, which is intermediate 1, control N,N-di The weight ratio of methylethanolamine and methyl methacrylate is 1:5, the consumption of phenothiazine is 3.5% of the weight of methyl methacrylate, and the consumption of 2-mercaptobenzothiazole is 2% of the weight of methyl methacrylate. %;
[0040] Add the prepared intermediate 1 into deionized water, stir at a constant speed for 5 minutes, adjust the pH to 8, then add phenothiazine, stir at a constant speed and feed in meth...
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