农户秸秆处置及供生物质电厂成本分析

Analyses of Farmers' Straw-Disposal Condition and Biomass Supply Cost for Power

为了分析农户秸秆就地焚烧造成面源污染而生物质电厂秸秆收购难的问题,通过对七省124个农户进行调研,结合家庭情况得到了农户秸秆处置的数据.结果显示59.3%的农户焚烧过秸秆,82.3%的农户未出售过秸秆.基于调研对农户秸秆供应进行场景设置,并建立供应成本的数学模型.以江苏省某生物质电厂秸秆供应为例,对不同场景下水稻秸秆供应成本进行分析,得到成本最高250元·t-1、最低186元·t-1.该模型可为引导农户合理利用秸秆、生物质电厂制定秸秆收购价格提供参考依据.

In order to analyze the problem of straw shortage from the perspective of farmers, an investigation was conducted.Among the respondents,59.3% burned the straw,and 82.3% did not sell the straw to any enterprise.Four scenarios with three stubble heights are established. An mathematical model about straw harvesting, collection,transportation,and storage is established. Parameters are selected basing on one biomass power plant in Jiangsu Province.The results show that the cost of straw selling is 186-250 CNY·t^-1.The machinery collection reduces the total cost finitely.The relation between the labor price and the cost is examined.The labor price affects the manpower collection scenarios more obviously than the machinery collection scenarios.The cost model is made without considering the information problem.