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Environmental Monitoring

Leak Control NH3 in Industrial Cold Storage
10/16/2026 16:35:37

Managing refrigeration systems using ammonia (NH3) aims to minimize the risk of poisoning, fires, and explosions, ensuring occupational safety and system operation

Toxic Gas Traps in Sewers & Tanks and The 3-Minute Rule
10/15/2026 16:12:33

Confined space environments frequently accumulate hazardous gases originating from organic decomposition or long-term chemical reactions. Therefore, strictly adhering to the minimum 3-minute air testing procedure using a Portable Gas Detector is considered a mandatory safety requirement to protect workers' lives.

Formula for Converting TOC to COD for Wastewater
10/14/2026 11:27:30

This article addresses various questions in turn, covering whether conversion is permitted, how to establish the K-factor, when the factor ceases to be valid, and which equipment is suitable

Measuring COD and TOC in Electroplating Wastewater Using a Benchtop Analyzer? What Sources of Error Should Be Avoided?
10/13/2026 10:55:11

The current situation regarding electroplating wastewater analysis presents challenges: the wastewater contains acids, alkalis, and heavy metals (such as Cr, Ni, and Cu), alongside persistent cyclic organic compounds derived from brightening agents, anti-misting additives, and degreasing solvents. This complex composition causes significant fluctuations in COD levels depending on the specific process stage and production shift. Sending samples to external laboratories results in a delay of several days—by which time the biological treatment tanks or coagulation systems may have already been operating improperly for too long. Utilizing a benchtop COD analyzer on-site reduces this turnaround time to just a few hours, provided the user fully understands the specific sources of error associated with electroplating wastewater

How to Rapidly Reduce COD in Domestic Wastewater?
10/13/2026 10:25:11

Wastewater treatment plants serving apartment complexes, buildings, and residential areas sometimes experience effluent COD levels approaching regulatory limits, particularly following sudden load surges or shortly before scheduled compliance sampling. QCVN 14:2025/BTNMT, applicable to domestic wastewater from September 1, 2025, sets COD limits based on discharge volume and the receiving water body, while allowing dischargers to choose between TOC and COD parameters

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