the Technical of end-of-pipe management technology for pollution chemical oxygen demandisAerobic biological treatment，Its Technical efficiency of end-of-pipe management65，The formula for calculating the actual operation rate (k-value) of the end-of-pipe treatment facility is K = normal operation time of wastewater treatment facility (hours/year) / normal production time of enterprises (hours/year) This dataset is derived from the Pollution Source Census Report and contains information on pollution emissions and related products. However, it does not include data on energy or chemical consumption, nor does it provide information on waste or co-product generation. When utilizing this dataset, please supplement the missing data based on actual conditions before use