1. Sewage settlement
Sewage sedimentation generally uses inorganic water treatment flocculants containing polyaluminum ferric chloride, polyferric sulfate or aluminum sulfate. For daily use, we choose anionic and non-ionic polyacrylamide. It is convenient to judge the selection of anionic and non-ionic. We generally determine it according to the PH value of sewage. If the pH is less than 7, it is recommended to use non-ionic. If it is above 7, choose anionic type, if it is just 7, then we should choose anionic type with lower degree of hydrolysis.
2. Sludge dewatering
How to choose a water treatment agent for sludge dewatering? We mainly look at what industry the sewage belongs to, and judge the level of ionization based on the organic content in the sewage. To
For example, we use a beaker to do the experiment of sludge dewatering in the laboratory. In the experiment, we will encounter a lot of such problems. In theory, there is no standard to determine the sedimentation or sedimentation of the sewage It is the quality of sludge dewatering. Most of them choose water treatment chemicals according to the experimenter's own experience and feelings. To
Based on many years of experimental experience, we temporarily judge the water treatment agent based on its sedimentation rate, compression ratio, and clarity of the supernatant. To
1. The settling speed is the speed of coagulation after adding polyacrylamide flocculant. ,
2. Compression ratio refers to the ratio of sludge-water separation after sewage or sludge is flocculated by the flocculant. To
3. The clarity of the supernatant is well understood. We can observe by naked eyes.