BOD/COD Online Measurement for Industry

BOD/COD Online Measurement for Industry
(Online BOD/COD Monitoring for Industrial Use: A Practical Guideline)

   Efficient wastewater management in the industrial sector is a key factor in promoting sustainability and regulatory compliance. Today, regulations require many industrial facilities to install specialized instruments for online BOD/COD monitoring to ensure
accurate, real-time assessment of water quality. These systems support environmental protection efforts and help industries meet long-term sustainability standards.

Industries Required to Install BOD/COD Monitoring Instruments

According to industrial pollution control regulations, the following types of facilities are required to install BOD/COD analyzers:

• Facilities Discharging More Than 500 Cubic Meters of Wastewater per Day
  Facilities that discharge over 500 m³ of wastewater per day face a high risk of pollution. Online BOD/COD monitoring enables more efficient and continuous assessment of wastewater quality to prevent environmental impact
  
• Facilities with Influent BOD Load Starting from 4,000 kg/day
  Facilities with an influent BOD load of 4,000 kilograms per day or more are considered high-load dischargers and must monitor the quality of incoming wastewater to prevent system overload and ensure effective wastewater
  treatment
  

Data Reporting and Accountability

In an era where environmental transparency is non-negotiable, real-time BOD/COD online measurement plays a crucial role in continuous monitoring and reliable reporting. It enhances not only pollution control but also compliance accuracy.

• Real-Time Data Submission
  Industries must be able to submit real-time data to environmental authorities for continuous pollution management. This supports prompt response and accurate analysis for better compliance.
•  Measurement Deviation Reporting
  To ensure measurement accuracy, factories are required to submit a report on measurement deviation at least twice a year, specifically in June and December. This report is essential for verifying the reliability of measuring instruments
  and the accuracy of wastewater monitoring processes. The key objectives are as follows:
                 - Evaluate Instrument Performance: The deviation report helps confirm that the analyzer is functioning correctly with a high level of accuracy.
                 - System Adjustment and Maintenance: If the deviation is found to exceed acceptable levels, the factory must take immediate corrective action, such as recalibration or maintenance of the equipment
  
  

Required Equipment and Operating Principles

Factories must be equipped with instruments capable of accurate, real-time online water quality monitoring. Recommended devices include :

• Flow meters and electricity meters for calculating total wastewater flow and treatment energy use.
• Online BOD and COD Analyzers based on optical principles, which ensure high-accuracy detection and continuous
  data reporting

How COD is Measured (Chemical Oxygen Demand)
COD is typically measured using UV Absorbance Technology. This involves detecting the absorbance of UV light at a wavelength of 254 nm to estimate the organic content of water samples

How BOD Is Measured (Biochemical Oxygen Demand)
BOD can be measured using AI-based data models that have been developed to estimate BOD values without the need for traditional 5-day incubation testing

Benefits of Online Water Quality Monitoring Systems
     The use of online analyzers for water quality monitoring offers numerous advantages that enhance the efficiency of quality inspection. This has become an essential tool for industrial facilities. While this technology ensures accurate BOD/COD measurements, it also significantly improves the overall efficiency of wastewater management. Key benefits include:

•  Speed and Accuracy: Provides real-time monitoring and reporting, enabling rapid response.
  
• Continuity and Compliance: Supports uninterrupted reporting aligned with regulatory requirements.
  
• Lower Operating Costs: Reduces chemical usage and risk, e.g., from potassium dichromate, improving environmental and occupational safety
  

Implementation Guidelines

Facilities required by law to install and operate BOD/COD analyzers should begin with proper planning, expert consultation, and system integration to ensure full compliance. Selecting the right measurement system is critical to minimizing long - term operational costs and maintaining sustainable business practices.

For Consultation and Product Support

If you need more information or guidance on selecting and installing BOD/COD monitoring instruments, please contact our expert team:

Website: https://www.ase-thai.com
Line: @ase-thai
Email: sales@ase-thai.com
Tel: 083 298 9222