A waste load allocation method based on unfairness factors and its application in the Zhangweinan Watershed, northern China

摘要

A waste load allocation method was developed for industrial wastewater management basednon unfairness factors, an industrial allocation factor and pollution reduction discounts. Threenunfairness factors were defined to assess the relative efficiencies of energy consumption,npollution discharge and waste treatment costs for different industries. The overall effect of thesenfactors was described by an industrial allocation factor. Based on the values of these factors,nindustries were classified into three types, after which waste load allocation proportions amongndifferent industries were determined using different pollution reduction discounts. This waste loadnallocation method was then applied in the Zhangweinan Watershed, which is one of the mostnseriously polluted watersheds in northern China. The results revealed that extractive, mechanicalnand food industries comprise the type I industries, which had the lowest pollution reductionndiscounts of 0, 0.25 and 0.5, respectively. The metallurgical industry and other industries werencharacterized as type II and discounts of 0.5 and 0.6 were given to their primary reductions.nTextile, pharmaceutical, oil and pyrogenic, chemical and paper industries were classified as typenIII industries and had a waste load reduction of more than 80% of the pollution discharge in 2004.