Method for treating folic acid wastewater
A treatment method and technology for wastewater, applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problems of complex operation, high energy consumption and high cost, and achieve a simple operation method, low cost and energy saving. Effect
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[0027] Example 1
[0028] First, take 200ml of folic acid wastewater, the pH of the folic acid wastewater is 0.5, the COD value is 2000mg / L, the ammonia nitrogen value is 210mg / L, and the total dissolved solids is 25000mg / L; sodium hydroxide is added to adjust the pH to 4.3 to obtain Solution; Then, pour the solution to be processed into the filter tank, and filter with a 0.45μm filter membrane; after the filtration is completed, the filtrate is obtained; then the filtrate is poured into the rotary evaporator to ensure that the pressure is controlled at 0.04Mpa and the temperature is 80 ℃, the concentration rate is 50%. After the distillation, the condensate is obtained, that is, the effluent is obtained.
[0029] The content of COD, ammoniacal nitrogen and TDS in the effluent of Example 1 was measured. The removal rate of COD was 97.9%, the removal rate of ammoniacal nitrogen was 93.9%, and the removal rate of TDS was greater than 99%.
Example Embodiment
[0030] Example 2
[0031] First, take 100ml of folic acid wastewater. The pH of folic acid wastewater is 1.1, COD value is 9500mg / L, ammonia nitrogen value is 330mg / L, total dissolved solids is 42000mg / L; sodium hydroxide is added, and the pH is adjusted to 4.2 to obtain Solution; Then, pour the solution to be processed into the filter tank and filter with a 0.22μm filter membrane; after the filtration is completed, the filtrate is obtained; then the filtrate is poured into the rotary evaporator to ensure that the pressure is controlled at 0.06Mpa and the temperature is 90 ℃, the concentration rate is 60%. After the distillation, the condensate is obtained, that is, the effluent is obtained.
[0032] The content of COD, ammonia nitrogen and TDS in the effluent of Example 2 was measured. The removal rate of COD was 99.4%, the removal rate of ammonia nitrogen was 95.7%, and the removal rate of TDS was greater than 99%.
Example Embodiment
[0033] Example 3
[0034] First, take 500ml of folic acid wastewater, the pH of folic acid wastewater is 2.3, COD value is 30000mg / L, ammonia nitrogen value is 600mg / L, total dissolved solids is 60000mg / L; sodium hydroxide is added and the pH is adjusted to 4.0 to obtain Solution; Then, pour the solution to be processed into the filter tank and filter with a 0.45μm filter membrane; after the filtration is completed, the filtrate is obtained; then the filtrate is passed into the MVR reactor to ensure that the pressure is controlled at 0.05Mpa and the temperature is 85 ℃, the concentration rate is 50%. After the distillation, the condensate is obtained, that is, the effluent is obtained.
[0035] The content of COD, ammonia nitrogen and TDS in the effluent of Example 3 was measured. The removal rate of COD was 99.8%, the removal rate of ammonia nitrogen was 98.5%, and the removal rate of TDS was greater than 99%.
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