Cooling — Process Challenge

冷却水システムにおける微生物制御

温暖・曝気・栄養豊富な冷却水は細菌、藻類およびバイオフィルム(SRB含む)を増殖させ、フィル材を汚損し、沈積下腐食を引き起こし、レジオネラを温存する。設計では酸化性殺生物剤による全量殺菌と、非酸化性剤および第四級アンモニウム塩によるバイオフィルムおよび耐性菌対策を併用
Updated Jun 2026
ソリューションアプローチ

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Treatment Workflow
1
Water & System Assessment
Characterize the water and the system — hardness, alkalinity, pH, TDS/conductivity, microbial load, and the metallurgy and temperatures of the equipment being protected.
2
Program & Chemistry Selection
Match coagulants, flocculants, scale and corrosion inhibitors, biocides, or pH adjusters to the water profile and discharge limits, factoring compatibility with any existing program.
3
Jar Testing & Dosing
Confirm coagulant and flocculant dose and feed point by jar test, set inhibitor and biocide treat rates, and size packaging (drums, totes, bulk) to consumption.
4
Monitoring & Control
Track residuals, turbidity, ORP, corrosion coupons, and effluent compliance, adjusting chemistry and dose as feedwater and load change.
Recommended Chemistries (8)
Sodium Hypochlorite
CAS 7681-52-9
酸・塩類
Primary oxidizing biocide
1791 (SODIUM HYPOCHLORITE) · Class
Primary oxidizing biocide; hypochlorite/HOCl oxidizes cell membranes for broad, low-cost bulk-water kill. (Spine tags this pH Adjustment; the chemistry is oxidizing-biocide.)
融点:MP: 18 °C /Pentahydrate/   沸点:Boiling point: 111 °C in solution   密度:1.093 for 5% solution
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Calcium Hypochlorite
CAS 7778-54-3
特殊添加剤
殺生物作用
2208 (BLEACHING POWDER) · Class
Solid chlorine donor delivering HOCl where liquid bleach handling/decay is impractical; same oxidative disinfection mechanism
融点:100 °C   沸点:Decomposes at 100 °C   密度:2.350 g/cu cm
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Sodium Dichloroisocyanurate (SDIC)
CAS 2893-78-9
特殊添加剤
殺生物作用
2465 (SODIUM DICHLORO-S-TRIAZINETRIONE) · Class
Stabilized (chloroisocyanurate) chlorine releases HOCl slowly, holding a more persistent oxidant residual than free chlorine
融点:225 °C   密度:0.96 at 20 °C   Solubility: Soluble
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Chlorine Dioxide
CAS 10049-04-4
特殊添加剤
殺生物作用
9191 (CHLORINE DIOXIDE) · Class
ClO2 stays biocidal across a wide pH and penetrates biofilm better than chlorine, and does not form THMs; strong against established slime
融点:-59 °C   沸点:11 °C at 760 mmHg   密度:1.6 (Liquid at 0 °C)
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DBNPA (2,2-Dibromo-3-Nitrilopropionamide)
CAS 10222-01-2
特殊添加剤
速効性の非酸化性殺菌剤
2923 (2,2-DIBROMO-3-NITRILOPROPIONAMIDE) · Class
Fast-kill non-oxidizing biocide that hydrolyzes quickly to low-residual products; ideal for slug dosing where an oxidizer demand is too high
融点:123 to 126 °C   沸点:Decomposes at 190 °C   Solubility: In water, 1.5 g/100 mL (15,000 mg/L)
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グルタルアルデヒド
CAS 111-30-8
特殊添加剤
Broad-spectrum biocide
2810 (GLUTARALDEHYDE SOLUTION) · Class
Dialdehyde cross-links cell-wall proteins; the standard non-oxidizer for biofilm and sulfate-reducing-bacteria (SRB) control, effective in dirty/high-demand water
融点:< -7 °C   沸点:187–189 °C at 760 mmHg (decomposes)   密度:1.062 to 1.124 at 20 °C
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Benzalkonium Chloride (BKC, ADBAC)
CAS 8001-54-5
界面活性剤
Quaternary ammonium biocide
2928 · Class
Cationic quat disrupts membranes and acts as a biodispersant that lifts biofilm off surfaces, complementing the oxidizers
融点:241.02 °C   密度:0.9429 g/cu cm at 25 °C   Solubility: Very soluble in alcohol, acetone; slightly solu…
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Isothiazolinone(CMIT/MIT)
CAS 26172-55-4
特殊添加剤
防腐
CMIT/MIT isothiazolinone is a standard rotational non-oxidizing cooling-tower biocide for algae/bacteria, alternated with DBNPA/glutaraldehyde to limit resistance.
融点:54-55 °C   密度:For a mixture of 5-chloro-2-methyl-3(2H)-isothi…   Solubility: Solubility in g/100 mL solvent: water, infinite
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