The Coagulant and Flocculant for alternative. Present to Provincial Waterworks Authority By Behn Meyer Techno-Chemical. Behn Meyer Group Since 1840. Group History Behn Meyer today Behn Meyer Thailand Behn Meyer Chemical (T) Co., Ltd. Behn Meyer Techno-Chemicals (T) Co., Ltd.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Provincial Waterworks Authority
Behn Meyer Techno-Chemical
The group‘s business lines can be categorized into three main groups:
Chemical Agricare Trading
Clinton,NJ 08809 USA
Coagulants are chemicals, typically salts of iron or aluminum, that cause suspended solids in water to agglomerate into larger particles which can then be removed by physical separation methods.
% Basicity= [OH] / (3 x [Al]) x 100
“ The Goal of using Coagulants in Water Treatment is the removal of Suspended Solids and soluble and insoluble organic material.”
Suspended Solids are stable in solution due to small size / low density and negative surface charge.
Negative Surface charges on particles help stabilize them in aqueous solution.
The higher the charge to surface area ratio, the more stable the particle
Particle Classification mm mm/s
Gravel 1.0 100
Coarse Sand 0.4 42
Sand 0.1 8.0
Fine Sand 0.02 0.62
Silt 0.004 0.025
Schultz -Hardy Rule:
C = k / Z6
C = Concentration, Z = Charge, k = constant
The aluminum chloride complex stays soluble longer than an aluminum sulfate ion
When simple Aluminum (or Iron) salts are added to water, they produce a positively charged ion:
Al2(SO4)3 >>>>>> 2 Al3+ + 3 SO42-
The positive charge can destabilize the negative surface charge on suspended particles.
Alum, for example, must be added until the pH falls into the range where the aluminum ion is soluble (< 5) and then removes the organic acid through charge neutralization.
Ferric chloride sometimes operates at pH < 4.
The problem is that the pH must be brought back up.
Renewable resources Forest
Without change the water characteristics
Patented product and manufacturing process
No effluent discharge
Scrubbers in the Chaminees with close loop/cycle
Filtration / separation of ash
Spent bark fuels the boiler (energy conservation)
Excess residues : ash + spent bark = organic fertilizer
Hoverth ( 1981) gave one of the most satisfactory definitions of tannin :
“Any phenolic compound of sufficiently high molecular weight containing sufficiently hydroxyls and other suitable group ( i.e. carboxyl ) to form effectively strong complexes with protein and other macromolecules under the particular environmental condition being studies “
Tannin can complex with Proteins, Starch, Cellulose, and Minerals.
Organic Cationic Vegetable Polymer
Non toxic, Low molecular weight
Consumed on the sludge
Does not change the pH
Act on a wide pH range
Tanfloc can be used as the primary coagulant or as an auxiliary flocculation agent , being compatible with most of products sold on the market for this purpose
Quaternary ammonium tannate monomer
Quaternary ammonium tannate polymerized
An irregular form , presenting a larger surface area than other flocculants with round flocs. This enable more efficient clarification with minor turbidity in final treated water
The sludge generate from water treatment with TANFLOC is organicand is notof environmental concern like Aluminum based flocculants. TANFLOC sludge can therefore be used as an agricultural organic compost.
Pulp and paper
Behn Meyer Techno-Chemicals(T) Co.,ltd.189 Moo 6 Bangkok-Chonburi( New highway)Rd. Tabyao, Ladkrabang, Bangkok , THAILAND 10520tel. 0 2327 9800fax 0 2360 6076