|
The performance comparison of SPFS and PAC |
| Item
|
SPFS
|
PAC |
Remark
|
flocculant
|
iron salt |
aluminum salt
|
|
coagulant
|
purifying agent
|
water treatment agent
|
GB
|
| |
name |
one step
|
common liquid phase immerse
select method
|
|
characteristic |
easy, low cost,
no pollution, high production efficiency
|
complicated, high cost, pollution,
low efficiency |
| corrosiveness |
small |
big |
| materials |
copperas water treatment agent
|
aluminum
|
|
|
properties |
steadiness,no
bad in long time
|
common stability,alid period
is 6 months
|
106 times |
solubility |
good
|
no bad
|
solution |
red brown transparent
|
lemon yellow turbid |
application PH |
4--11,best 6--9
|
5--7.5,best 6.7--8.0 |
If the temperature
<4  |
good
effect |
bad |
corrosiveness |
small |
corrosiveness |
alum flower |
large
SG, fast settlement |
smalll
SG, slow settlement |
flocculus hydroxide |
Ksp=10-39 |
Ksp=10-33 |
color light |
red
brown |
achromatic
or lemon yellow |
ion water phase
metastasis |
no
|
increase
1--2 times |
ratio of ion
theoretical metastasis
|
1
|
106
|
water mechanics conditions
|
increase strength
|
high strength
|
|
| |
the effect of
purify body |
excellent |
good |
|
toxicity experiment
|
no |
toxicity |
muddy reducing
ratio |
99.6% |
96% |
decolor ratio |
>90% |
60% |
remove rate of
COD |
>90% |
50% |
deodorization
effect |
clear |
no clear |
remove rate of
bacteria |
98.89% |
no clear |
remove rate
of iron |
96.49% |
no |
remove rate
of hardness |
15.31% |
no |
remove rate
of chloride |
50% |
increase |
remove rate
of fluoride |
91.67% |
noof |
remove rate
of ammonia nitrogen |
57.14% |
no clear |
remove rate
of zinc |
41.67% |
no |
comprehensive
effect |
increase water
quality,lower cost
|
two sequence pollution,high
cost
|