PSI (Poly Silicate Iron)
Coagulant materials for water treatment
1. Strong coagulation power
2. Environmentally friendly ( soil generatedby PSI can be used for agricultural use )3. Safe for living creature and human
Poly Silicate Iron (PSI) is the coagulant for water treatment. When compared withgeneral coagulant PAC (Poly Aluminium Chloride), it is the safe coagulant for earth,plant, animal and human health since PSI consists of safe abundant element, Fe(Iron) and Si (Silicon), and do not contain Al (Aluminium). PSI can be recycled backto agricultural soil owing to its environmentally friendly nature and therefore, PSI is
the new solution for water treatment industry.
In a recent world, the quantity of water which is contaminated with algae and toxic
soluble organic substances increases because of human population burst.
Therefore, PAC or aluminium sulfide as aluminium based general coagulant can not
fulfill the requirement of growing demand situation.
Aluminium based coagulant has the problematic issue due to its influence toenvironment and human health. When spread on soil, phosphate depletion could
occur and that will be a problem. PSI coagulant consists of iron and silica and is thevery environmentally friendly and safe coagulant or water treatment. Coagulation
force is very strong compared with PAC and even algae and organic substances
can be eliminatedin which PAC has the difficulty coagulating. Furthermore, PSI functions very welleven at low temperature in which PAC is inactive.

FUJI PIGMENT CO.,LTD
2-23-2 Obana Kawanishi-city, Hyogo prefecture 666-0015 JAPAN
Phone: 072-759-8501 Facsimile: 072-759-9008
WEB : http://www.fuji-pigment.co.jp

The Features
1. Strong coagulation effect under low temperature and lowimpurity conditions.
Owing to nature of iron and inorganic polymer (polymerized silica), strong
coagulation effect can be expected even at low temperature, low impurity conditions
in which general aluminium based coagulant (PAC) had only a weak effect.

2. Filtration time can be extended
Compared to PAC, increase speed of head loss can be lowered effectively.One canextend 10-20 % of filtration time period.

Moreover, youcan obtain clean filtrated

water without biasing more force to filtration layer.

3. The amount of sludge can be decreased
Specific effect of iron and inorganic polymer enables us to provide strong sludge
compressionand dehydration,by PSI.

Therefore, the water content in the sludge

can be lowered which results in decreasing the sludge quantity.

Eventually,

disposal cost of sludge can be saved.

4. Precursor substance materials of “trihalomethane”can beeffectively removed
Organic color chemicals as the precursor substance materials of trihalomethoane
can be effectively removed by strong coagulation effect of PSI.

5. Soil generated by PSI water treatment can be used toagricultural soil.
This is the most important feature of PSI.The soil generated by PSI water treatment
contains rich phosphor which is essential nutrition for plant growthand therefore, canbe used as agricultural soil.

PSI is the very environmentally friendly coagulant

compared to aluminium based coagulant such as PAC.

FUJI PIGMENT CO.,LTD
2-23-2 Obana Kawanishi-city, Hyogo prefecture 666-0015 JAPAN
Phone: 072-759-8501 Facsimile: 072-759-9008
WEB : http://www.fuji-pigment.co.jp

6. Environmentally friendly and safe for human and live animal
healthPSI is composed of iron and silica and very safe. Whereas aluminium based
coagulant PAC remains the problem of influencingthe central nerve system diseasebecause of residual aluminium.

7. The weak-point of PSI which is gelation during storage, issuppressed with our technology
PSI tends to cause gelation during long term storage in a container.

However, wehave succeeded to suppress gelation problem with our technology.

Si / Fe

0.11 - 0.25

Fe (wt %)5.0 - 6.0

pH

2 - 3.5

Specific gravity

1.05 - 1.15

Viscosity (mPa・s)

10 以下

Average molecularweight

500000appearance

Brownish yellow
liquidBasic properties of PSI(Above numbers could be modified upon customer’srequest)

FUJI PIGMENT CO.,LTD
2-23-2 Obana Kawanishi-city, Hyogo prefecture 666-0015 JAPAN
Phone: 072-759-8501 Facsimile: 072-759-9008
WEB : http://www.fuji-pigment.co.jp

Waste water from the chemical company factoryin Japan, treated with same amount ofPAC (poly Aluminium Chrolide)and PSI(poly Silicate Iron).

As one can see, only PSI

shows sedimentation whereas PAC was too little to be effective for coagulation.

River water from “Ina River”locates at Hyogo prefecturein Japan, treated with PSI(polySilicate Iron).

As one can see, PSI is very effective for River water.

FUJI PIGMENT CO.,LTD
2-23-2 Obana Kawanishi-city, Hyogo prefecture 666-0015 JAPAN
Phone: 072-759-8501 Facsimile: 072-759-9008
WEB : http://www.fuji-pigment.co.jp