What is Chloride?
Chloride is an essential mineral that can be found in natural waters and introduced through sources such as de-icing salts, agricultural runoff, industrial processes, and domestic use. One of the most familiar forms of chloride is sodium-chloride, or table salt.
While important for our nutrition, excess chloride can build up in water bodies, impacting aquatic life, soil quality, and our water supply.
Why is Monitoring Chloride Important for Drinking and Wastewater Treatment Process Optimization?
In drinking water, high levels of chloride can mean a few things:
- Taste impact: high chloride can make water noticeably salty.
- Corrosion risks: chloride can lead to corrosion in pipes and distribution infrastructure, allowing metals to leach into the water.
- Source contamination: increased levels can indicate contamination from road salt, or other potentially harmful contaminants.
It is recommended that chloride is 250mg/L in the Guidelines for Canadian Drinking Water Quality. The US also follows this guideline.
In wastewater, chloride is closely monitored due to its environmental impact:
- Harmful to aquatic life: elevated concentrations can stress aquatic ecosystems and reduce overall biodiversity.
- Disrupts biological processes: high chloride can inhibit the microorganisms responsible activated sludge in treatment plants, reducing treatment efficiency.
- Regulatory compliance: many facilities must meet strict chloride discharge limits, and continuous monitoring helps identify sources contributing to chloride levels.
Monitoring chloride in wastewater treatment is critical for regulatory compliance and ensuring water safety.
Online Chloride Monitoring
Traditional methods rely on grab sampling and lab analysis, which can be costly and time-consuming. Online ion selective electrode (ISE) eliminates labor costs and additional delays by providing continuous, real-time measurements. The benefits of ISE-based online systems include:
- Rapid response for immediate process adjustment
- Ease of integration with other automated analysis and control systems
- Reliable performance across a wide concentration range.
MANTECH’s Online MO systems help operators improve corrosion control, optimize treatment performance, and protect water quality using advanced ISE technology. The MO systems provide fast feedback and send alerts via remote network or email notifications. This allows operators to make actionable decisions, leading to treatment efficiency. The MO500 is most applicable for one to two parameters while the MO1000 can measure more parameters.
References:
https://www.epa.gov/sdwa/drinking-water-regulations-and-contaminants https://www.princeedwardisland.ca/en/information/environment-energy-and-climate-action/chloride-in-drinking-water
https://vitalibrary.com/chloride-functions-benefits-side-effects/
https://www.waterandwastewater.com/chloride-in-wastewater-treatment/
