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Quaker helps customers solve microbial contamination and odor problems
Quaker recently received a call from a customer who raised concerns about the safety of microbes and odors in their coolant system. The company quickly mobilized its technical team to visit the site, aiming to address the issue promptly and effectively. During the on-site meeting with the factory’s personnel, it became clear that the main problem was **low pH levels in the coolant**, which can be irritating to the skin and mucous membranes. Following the visit, Quaker submitted a detailed analysis report to the customer's chemical management department, revealing a high level of bacterial contamination in the coolant.
Bacterial contamination in coolants is a common challenge, often caused by microorganisms present in the air. In this particular factory, the local atmospheric conditions contributed to the presence of various types of bacteria and fungi. Over time, these microorganisms have become dominant in the area due to air flow patterns, which explains why different factories may experience varying types of microbial issues.
In general, **microbial contamination and odor generation** are closely linked to several factors:
**1. Coolant pH Level**
a) pH measures the acidity or alkalinity of an aqueous solution or emulsion.
b) It plays a key role in the solubility of alkanolamines, which are commonly used in coolants. When pH drops, these compounds tend to volatilize into the air, releasing an ammonia-like odor.
c) The ideal pH range for coolant is typically between 9.0 and 9.5.
d) Microbial activity produces acidic byproducts, which lower the pH. Raising the pH can help suppress microbial growth and reduce odor formation.
**2. Prolonged Microbial Contamination**
a) Microorganisms consume components like alkanolamines in the coolant to support their growth.
b) This process generates metabolic waste, which contributes to unpleasant odors.
c) Regular maintenance and monitoring are essential to prevent long-term issues.
**3. Systemic Pollution**
a) Oils from machine spindles, hydraulic systems, and rail systems can contaminate the coolant, altering its composition.
b) Some oils contain additives, such as zinc, which can negatively affect aluminum-based systems due to their high electronegativity.
Based on the customer's situation, when the pH dropped below the acceptable limit, microbial growth increased significantly. To counteract this, Quaker recommended raising the pH using amines, which helps control microbial activity and reduces volatile odors. However, if not managed properly, this could still lead to discomfort for workers.
To address this, Quaker introduced a dynamic control program designed to maintain a stable and bio-stable coolant environment. By managing pH fluctuations, the program effectively controls microbial growth and prevents odor release, ultimately improving workplace health and safety.
The customer followed Quaker’s recommendations and successfully resolved the issue. As always, Quaker remains committed to providing on-site technical support and solving real-world application challenges for its clients.
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