By adding polyaluminum chloride to the raw water, the impurities flocculation in the water precipitation to achieve the purpose of water purification
Two, pharmaceutical preparation
1. Take 1g of polyaluminum chloride powder and dissolve it with water, and transfer it to 1000ml volumetric bottle to obtain 0.001g / ml polyaluminum solution of polyaluminum chloride
Iii. Experimental steps
Three groups of 1000ml of raw water were placed in a beaker with 3ml, 5ml and 7ml of polymer aluminum chloride solution respectively, fully stirred, and 15min of alum after natural settlement, the supernatant was measured for turbidity, pH, COD, total phosphorus, total nitrogen and ammonia nitrogen, and the data were recorded
Iv. Experimental results
raw water
Add 3ml
Add 5ml
Add 7ml
turbidity (NTU)
3.67
0.53
0.26
0.10
pH price
7.56
7.52
7.43
7.40
COD(mg/L)
52.05
33.74
14.22
12.26
Total phosphorus (mg/L)
0.7
0.11
0.09
0.05
Total nitrogen (mg/L)
21.6
12.635
11.46
10.79
Ammonia nitrogen (mg/L)
1.26
0.78
0.56
0.33
V. Experimental conclusions
In the drainage depth treatment application, polymer aluminum chloride can be quantitatively added according to the actual drainage index, which can remove the raw water index to reach the drainage index.
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