Views: 0 Author: Site Editor Publish Time: 2026-08-14 Origin: Site
Uncontrolled bacteria, algae and slime are common problems in industrial circulating cooling water systems. Excessive growth will block pipelines and heat‑exchange equipment, reduce heat‑transfer efficiency, and trigger corrosion risks. 1227 (Dodecyl Dimethyl Benzyl Ammonium Chloride, DDBAC) is a widely‑used non‑oxidizing biocide, a type of cationic surfactant, for circulating water treatment. This article shares practical guidance on product selection, dosing, limitations and safety notes for on‑site operation.
1227 belongs to quaternary ammonium salt cationic surfactants. It works by damaging the cell membrane of bacteria and algae to suppress microbial reproduction. Besides bactericidal and algicidal effects, it delivers slime stripping, certain dispersion and mild corrosion‑inhibition performance. It dissolves well in water and works stably under different water hardness conditions.
It should be noted that 1227 cannot solve all water quality issues. It targets microorganisms only and does not remove suspended solids or scale independently.
Algae bloom, green or brown floating matter in cooling tower basin
Bio‑slime accumulation inside pipes, heat exchangers and fill materials
Reduced cooling efficiency, increased energy consumption
Local under‑deposit corrosion on metal surfaces
Blockage of filters and nozzles
Check active content: Commercial 1227 products usually have 44% or 80% active substance. Confirm the effective content before calculating dosage, do not dose by volume blindly.
Select suitable grade: Standard 1227 may generate foam under high dosage. If your system is sensitive to foam, choose low‑foam modified quaternary ammonium products.
Verify compliance: Choose products meeting industry standard specifications. Request product safety data sheet (SDS) for storage, handling and environmental reference.
Match water system size: For large circulating water loops, evaluate whether continuous feed or shock batch dosing fits your site condition.
All figures are for general reference. Actual dosage shall be adjusted according to on‑site water test results and system conditions.
Regular bactericidal and algicidal maintenance Dose range: 50‑100 mg/L. Apply shock dosing every 7‑14 days for routine control of bacteria and algae.
Slime stripping treatment (heavy biofouling condition) Dose range: 200‑300 mg/L. When thick slime already exists in the system, use higher concentration for stripping. Foam is likely to form; add suitable defoamer if required. After stripping, filter out suspended dirt to avoid re‑deposition on equipment surfaces.
Dosing tips Add 1227 into the circulating water basin or suction side of pump. Avoid direct contact with concentrated acid or incompatible chemicals. Monitor bacteria count, foam condition and water quality after dosing.
Never mix with anionic surfactants or anionic water treatment agents. Mixing will cause precipitation and completely lose biocidal performance. Clean containers thoroughly before switching chemicals.
Can be combined with selected non‑anionic biocides such as isothiazolinone, glutaraldehyde for synergistic effect. Avoid combination with chlorophenol‑based agents.
Long‑term continuous use of 1227 alone may lead to microbial resistance. Best practice is to rotate with other types of biocides (oxidizing biocides etc.) to lower resistance risk.
1227 has limited penetration for aged dense biofilm. For heavy biofilm, pre‑treatment with oxidizing agent can improve overall treatment effect.
Wear proper PPE including gloves and goggles during handling. Avoid skin and eye contact.
Store in cool, ventilated indoor area, keep away from strong oxidants. Typical shelf life is 12 months for sealed original package.
Do not discharge undiluted 1227 directly to the environment. Treated blow‑down water must comply with local discharge regulations.
This product is toxic to aquatic organisms. Prevent leakage into rivers and lakes.
1227 is a practical cationic surfactant biocide for circulating water bacteria, algae and slime control. Correct product selection, reasonable shock dosing and chemical compatibility control determine actual treatment performance. No single biocide fits all systems. Operators shall combine regular water quality testing, system maintenance and biocide rotation strategy to achieve stable circulating‑water operation.
