Ammonia Removal Membrane (Deammoniation Membrane) Small-Scale Test Equipment

Ammonia Removal Membrane (Deammoniation Membrane) Small-Scale Test Equipment

This small-scale ammonia removal device is independently developed by our company to meet customers’ experimental needs. Customers can operate the device according to their specific requirements. After completing the installation as per the instructional video provided, you can begin the experiment. Below are usage recommendations and precautions.

Recommendations for Using the Ammonia Removal Test Equipment：

1.    Check Pipe Connections

Before starting the experiment, ensure that the raw water and acid circulation pipelines are unobstructed and properly connected. It is recommended to use silicone hoses with an inner diameter of 8mm and an outer diameter of 14mm for the entire system.

2.    Prepare the Acid Absorption Solution

Add 5 liters of tap water at 45°C to the acid circulation tank (note that 45°C is not a fixed value; the temperature of the acid absorption solution should be adjusted based on the raw water temperature due to heat exchange during operation). Then, add concentrated sulfuric acid to adjust the pH to between 0.5 and 1.5 (ensure the acid absorption solution volume is not less than 5 liters).

3.    Prepare the Raw Water

Add 5 liters of raw water to the raw water tank (the volume can be adjusted as needed but should not be less than 5 liters). Heat the raw water to 40-45°C and add an alkaline solution to adjust the pH to above 11.5 (the pH can also be adjusted as needed).

4.    Start the Acid Circulation Pump

While heating the raw water, start the acid circulation pump in advance and adjust the flow rate to 64 L/h (the flow rate is not fixed and is usually 2-4 times the raw water inflow rate; flow rate can be calculated by measuring the volume).

5.    Start the Raw Water Pump

Once the raw water’s pH and temperature reach the experimental conditions, start the raw water pump and adjust the flow rate to 16 L/h (the inflow rate is also not fixed and can be calculated by measuring the volume).

6.    Sample Testing

After the system operates stably for 10-15 minutes, take samples from the inflow and outflow for testing.

7.    Clean the Membrane Module

After the experiment, clean the membrane module. Replace the liquid in the raw water and acid circulation tanks with clean water, heat it to 40-45°C, and let the system run for 10-15 minutes. After cleaning, remove the membrane module, drain the water, and store it properly.

Note: The conditions provided are ideal for the experiment; customers may adjust the parameters based on their actual requirements.

Precautions：

1.    Adjustable Parameters

The pH of the raw water and acid absorption solution, raw water temperature, and the flow rates of raw water and acid circulation can be adjusted based on experimental needs.

2.    Safety Precautions

Since the system involves strong acids, strong bases, and the generation of ammonia gas when treating ammonia-containing wastewater, conduct the experiment in a well-ventilated environment. Ensure operators take adequate protective measures before proceeding.

3.    Ensure Even Mixing

When adding the alkaline solution to adjust the raw water’s pH, stir thoroughly to prevent NaOH from forming clumps at the bottom of the tank.

4.    Avoid Dry Heating

Ensure the heater is fully submerged in liquid during operation to prevent safety risks due to dry heating.

5.    Flow Rate Adjustment

If adjusting the raw water inflow rate, simultaneously adjust the acid circulation flow rate to ensure the acid circulation flow rate is 2-4 times the raw water inflow rate.

6.    Monitor Acid Absorption Solution pH

The acid absorption solution is recirculated, and its pH will gradually rise during operation. Monitor the pH closely and replenish concentrated sulfuric acid as needed to maintain the pH around 1.

7.    Raw Water Outlet Height

The raw water outlet must be higher than the overall system height. If the outlet is lower than the membrane outlet, siphoning may occur, leading to air bubbles in the membrane that affect ammonia removal efficiency.

8.    Shutdown Sequence

When ending the experiment, first turn off the acid circulation pump, then turn off the raw water pump.

9.    Ammonia Removal Efficiency

The ammonia removal efficiency of a single-stage membrane system ranges from 60% to 90%. The exact efficiency depends on the specific water quality conditions..

Product size specifications：