The Ministry of Ecology and Environment recently released the "Water Pollutant Discharge Standards for the Petrochemical Industry (Second Draft for Public Comment)", marking a structural adjustment in the management of wastewater discharge in the petrochemical industry.The revision of the new standard not only involves tightening the emission limits, but also represents a shift from the "result-based compliance" regulatory model to a "process-certifiable" model.Fuzhou Probest Intelligent Technology Co., Ltd., based on a deep understanding of the characteristics of petrochemical wastewater, has built a full-stack monitoring solution covering compliance of discharge outlets, process perception and data governance around the new standards, helping petrochemical enterprises achieve compliance in wastewater discharge and reduce costs.

The analysis results of the online monitoring data from petrochemical enterprises show that the compliance rates of conventional pollutants and some heavy metal indicators are relatively high, reaching 98% or above. However, in the batch monitoring data of direct discharge enterprises, the compliance rate of total organic carbon is only 60%.The new standard has officially incorporated TOC into the control system for indirect emissions and has assigned it a key role in the investigation of leakage from circulating cooling water.

Probest recommends adopting a dual-track monitoring strategy combining chemical oxygen demand (COD) and total organic carbon (TOC). The PCM300-CODcr chemical oxygen demand water quality online automatic monitor strictly follows the principle of the dichromate method and serves as the legal basis for pollutant discharge permit and compliance determination.PCM300 - TOC Total Organic Carbon Water Quality Online Automatic Monitoring Instrument using the combustion oxidation - non-dispersive infrared absorption method,For complex petrochemical wastewater, especially those containing refractory halogenated hydrocarbons and aromatic compounds, the combustion oxidation method offers a more thorough oxidation efficiency and lower matrix interference.Meanwhile, the ceramic valve core multi-way valve equipped in the ProbestTOC online analyzer effectively addresses the issue of core flow path components' wear caused by high-salt and highly corrosive media in the petrochemical industry, ensuring the stability of long-term operation.

The Probest PCM300 series online analyzer precisely captures ammonia nitrogen, total nitrogen, total phosphorus, etc. In response to the stricter limits on total phosphorus set by the new standards, the equipment adopts the ammonium molybdate spectrophotometric method to ensure measurement accuracy in low concentration ranges. At the same time, in accordance with the mandatory requirements of the benchmark drainage volume system for flow measurement, Probest is equipped with high-precision electromagnetic flowmeters and ultrasonic level meters, aligning the flow data with the water quality concentration data in a time series, providing enterprises with a complete and traceable calculation basis for total discharge volume, and avoiding compliance risks caused by missing measurement.

Probest independently develops and produces water quality analysis equipment such as COD, ammonia nitrogen, total phosphorus, total nitrogen, and TOC online automatic monitors. These devices operate reliably and stably over the long term, with compliant monitoring data that can be traced, and controllable operation and maintenance costs. They provide a one-stop solution for petrochemical enterprises, covering from compliance at the discharge outlet to process risk control.