关键词: 污染物排放, COD, NH3-N, 工业污染物, 影响因素分解, LMDI, 浙江省

Abstract: The Logarithmic Mean Divisia Index(LMDI)was used to decompose the driving factors of industrial waste water pollutants discharge in Zhejiang Province from 2010 to 2017.The pollutants included Chemical Oxygen Demand(COD)and ammonia nitrogen(NH3-N).The driving factors were decomposed into scale effect,structure effect and technology effect.During the research period,the industrial structure of Zhejiang Province changed from labor-intensive and resource-intensive industry to technology-intensive industry.The industrial COD and NH3-N discharge decreased by an average of 14.2% and 16.9% per year,respectively.The results showed that industrial growth increased the pollutants discharge.The scale effect raised COD discharge by 47 200 tons and NH3-N discharge by 3 300 tons.Structure effects reduced COD discharge by 21 900 tons and NH3-N discharge by 1 500 tons.The decrease of high-pollution industries proportion in Zhejiang Province led to obvious pollutant-reducing effects,while the increase of low-pollution industries proportion had little impact.Technology effect was crucial for industrial pollutants reduction,especially in high-pollution industries.

Key words: pollutant discharge, COD, NH3-N, industrial pollutant, driving factors decomposition, LMDI, Zhejiang Province;