Economic cost-benefit analysis for the agricultural use of sewage sludge treated with lime and fly ash  

作　　者：Efrat Hadas Uri Mingelgrin Pinchas Fine 

机构地区：[1]Investment Financing Department,Ministry of Agriculture and Rural Development,68 Hamakabim Road,P.O.Box 15159,7505101 Rishon LeZion,Israel [2]Agricultural Research Organization,Volcani Center,Institute of Soils,Water and Environmental Sciences,68 Hamakabim Road,P.O.Box 15159,7505101 Rishon LeZion,Israel

出　　处：《International Journal of Coal Science & Technology》2021年第5期1099-1107,共9页国际煤炭科学技术学报（英文）

基　　金：This work was funded by the Israel National Coal Ash Board(INCAB)Grant#39477.The authors wish to express their deep gratitude to the late Mr.Omri Lulav,Head of the INCAB.

摘　　要：A tool for calculating the economic and environmental impacts of the use of byproducts of industrial processes that can substitute for perishable resources was presented.This was exemplified by fly ash(the fine fraction of ash originating from coal burned to generate electricity and collected by filtering exhaust gases leaving the furnace),added to soil as a component of sewage sludge stabilized with fly ash and lime(NVS).Application to soil of NVS has potential agricultural and environmental advantages and disadvantages.The costs and benefits of such application were calculated using both a database and expert opinions.The calculations assumed a representative assemblage of soils and crops,with weights assigned to each crop type and soil characteristic.The annual weighted benefits(additional income for the farmer)and costs per hectare reached 324$/ha and 131$/ha respectively.Major potential benefits include:Chemical fertilizer replacement,159$/ha;Improvement to the soil’s physical properties,75$/ha;Supply of vital trace elements,33$/ha.Major potential costs were:Regulatory limitations on marketing of crops pending proof of absence of risk of heavy metals or radionuclides accumulation in these crops,(17$/ha and 36$/ha respectively);Application and incorporation cost,50$/ha.The presented estimates of the costs and benefits refer to the array of soils and conditions typical to Israel.It is possible to maximize potential benefits by applying fly ash only to the most suitable agricultural soils while improper use of fly ash will increase the costs incurred from its use.

关 键 词：Byproducts recycling Cost-benefit analysis Fly ash LIMING Sewage sludge 

分 类 号：S15[农业科学—土壤学]