城镇污水处理厂排放标准升级——增设4项污染物瞬时值要求

Core Viewpoint - The Ministry of Ecology and Environment, in collaboration with the State Administration for Market Regulation, has issued a modification to the "Urban Wastewater Treatment Plant Pollutant Discharge Standards" to enhance the precision and scientific nature of pollution discharge standards, effective from March 1 [1][2] Group 1: Regulatory Changes - The modification introduces instantaneous value requirements for four key pollutants: chemical oxygen demand, ammonia nitrogen, total nitrogen, and total phosphorus, which are slightly higher than the daily average values [1] - The daily average values for pH, color, and fecal coliform bacteria have been adjusted to instantaneous values to mitigate the impact of sudden high pollution levels on water bodies [1] Group 2: Industry Impact - The modification aims to promote better self-management among urban wastewater treatment plants, ensuring stable compliance with discharge standards [2] - The changes do not require treatment plants to alter their processing methods or incur additional economic burdens, but they must enhance operational management and improve their ability to handle abnormal inflows and shock loads [2] Group 3: Current Statistics - According to the "2023 Urban and Rural Construction Statistical Yearbook," the actual annual wastewater treatment volume in cities and county towns is 759.9 billion cubic meters, with a centralized treatment rate of 97.3% [1] - There are a total of 4,816 urban and county wastewater treatment plants with a treatment capacity of 27 million cubic meters per day [1]