Water Supply & Drainage Division

coagulants

Main Coagulants to be applied to Dehydrators

  Appearance Content Soluble Concentration Standard Addition volume Applicable Sludge Recommendable Dehydrator
Inorganic Coagulant
Ferric Chloride Liquid FeCl3 39% Undiluted solution 1～3ml/L
(Undiluted solution)		 Excess sludge
Mixed sludge		 Single Filter
Cloth type
(CS・MZ type)
Polyferric Sulphate Liquid Fe3+ 11% Undiluted solution 1～3ml/L
(Undiluted solution)
PAC
(Polyaluminum Chloride)		 Liquid Al2O3
10～11%		 Undiluted solution 2～4ml/L
(Undiluted solution)
Polymer Coagulant（organic）
Cation Powder 100% 0.2～0.3% 1.0～1.5%
against DS		 Excess sludge
Mixed sludge
Belt Press type
(L・BPS type)
Screw press type
(NS・SX type)
Liquid 40% 0.2%
(200times dilution)		 1.0～1.5%
against DS
(purity)
Nonion Powder 100% 0.2～0.3% 1.0～1.5%
against DS		 Pressure
Floatation sludge
Excess
combined Sludge
Belt Press type
(L・BPS type)
Screw press type
(NS・SX type)
Liquid 40% 0.2%
(200times dilution)		 1.0～1.5%
against DS
(purity)
Anion Powder 100% 0.1% 0.2～0.5%
against DS		 Coagulating
sedimentation
sludge
Belt Press type
(L・BPS type)
Screw press type
(NS・SX type)
Liquid 40% 0.1%
(400times dilution)		 0.2～0.5%
against DS
(purity)
(Caution)
  • When operation Screw press type dehydrator, the usage of polyferric sulphate and liquid Polymer Coagulant together is recommended, in order to forming stronger coagulation flocculation.
  • For obtaining effective Dehydrator's performance, Consult with us about the kind of coagulant ・addition volume. Use the coagulant which we recommend.

Pictures of Main Coagulant

Inorganic Coagulant Powder Polymer Coagulant Liquid Polymer Coagulant
Polyferric sulphate Powder Undiluted solution
PAC Dissolved Liquid Diluted Liquid

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