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Deamination Small Trial Report of Xinhua Pharmaceutical (Shouguang) Co., Ltd.


Release time:

2024-04-23

Membrane deamination experimental data

Deamination Small Trial Report of Xinhua Pharmaceutical (Shouguang) Co., Ltd.

一、Purpose of the experiment

Optimal operating conditions for PTFE membrane deamination are determined through small-scale experiments, with temperature and flow rate recorded for subsequent amplification engineering applications.

二、Experimental chemicals and equipment

  1. Raw water for small test: absorption liquid from the scrubber

  2. Small test equipment:  PTFE membrane deamination small test device;

  3. Experimental auxiliary equipment: heating rod, digital thermometer, pH test paper

三、Experimental steps

  1. Prepare two 10L raw water buckets and one acid bucket
  2. Add 9L of condensed water into the original water bucket and heat it to 40 degrees Celsius;
  3. turn on the raw water valve and the acid cycle valve;
  4.  Start the raw water pump and acid circulation pump, adjust the raw water flow to the set range, and the acid circulation flow to the set range;
  5.  After the solution in the original water bucket a passes through the membrane contactors, pour it into the outlet water bucket b

The overall process is as follows

Raw water → water inlet bucket → raw water pump → deamination membrane device → outlet water

四、The pH of the raw water is adjusted to 12.5, and the pH of the outlet water is stable at 12.5. The COD content of the raw water is 33500 ppm.

Table 1 Experimental data

Temperature=40℃, raw water flow=16 L/h, acid circulation flow=40 L/h

 

ammonia nitrogen(mg/L)

remove rate

remark

raw water

4000

/

/

outlet water

81

97.98%

two steps of membrane contactor

Table 2 Experimental data

Temperature=40℃, raw water flow=8L/h, acid circulation flow=40 L/h

 

ammonia nitrogen(mg/L)

remove rate

remark

raw water

4000

/

/

outlet water

16

99.6%

two steps of membrane contactor

Table 3 Experimental data

Temperature=40℃, raw water flow=8L/h, acid circulation flow=40 L/h

 

ammonia nitrogen(mg/L)

remove rate

remark

raw water

4000

/

/

outlet water

213

94.68%

two steps of membrane contactor

Table 4Experimental data

Temperature=40℃, raw water flow=8L/h, acid circulation flow=40 L/h

 

ammonia nitrogen(mg/L)

remove rate

remark

raw water

4000

/

/

outlet water

415

89.63%

two steps of membrane contactor

五、Experimental data analysis

  1. It has been observed that the removal rate varies significantly with the change in raw water flow rate.

  2. However, it has been found that the removal rate remains above 97% even at different flow rates.

  3. The COD content, on the other hand, does not have any significant impact on the overall removal rate.

  4. It has been noted that the ammonia nitrogen removal rate drops significantly with the decrease in raw water temperature, even at different flow rates.