Contaminant

General Features

The chemical clean

Inorganic salt deposit

The salt rejection:Clearly reduce.

The Delta pressure : Increase.

The System water yield: Slightly reduce

2% Citric acid，add the ammonia water to adjust the PH to 4, temperature:40℃

Oxide/hydroxide

The salt rejection:Clearly reduce.

The Delta pressure : Clearly increase.

The System water yield:Clearly reduce.

2% Citric acid，add the ammonia water to adjust the PH to 4, temperature:40℃

colloid

The salt rejection: Slightly reduce.

The Delta pressure : Gradually increase.

The System water yield: Gradually reduce.

2% STTP, add the sulphuric acid to adjust the PH to 10, temperature:40℃

Calcium carbonate

The salt rejection:Clearly reduce.

The Delta pressure : Slightly increase.

The System water yield: Slightly  reduce.

8% EDTA, 2% STTP,add the sulphuric acid to adjust the PH to 10, temperature:40℃

Organic precipitation

The salt rejection:Not change clearly.

The Delta pressure : Gradually increase.

The System water yield: Gradually reduce.

8% EDTA, 2% STTP,add the sulphuric acid to adjust the PH to 10, temperature:40℃

Bacterial contamination

The salt rejection:Not change clearly.

The Delta pressure : Clearly increase.

The System water yield:Clearly reduce.

8% EDTA, 2% STTP,add the sulphuric acid to adjust the PH to 10, temperature:40℃