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

International Journal of Coal Science & Technology 2021年第5期8卷 1099-1107页

作者： Efrat Hadas Uri Mingelgrin Pinchas Fine Investment Financing Department Ministry of Agriculture and Rural Development68 Hamakabim RoadP.O.Box 151597505101 Rishon LeZionIsrael Agricultural Research Organization Volcani CenterInstitute of SoilsWater and Environmental Sciences68 Hamakabim RoadP.O.Box 151597505101 Rishon LeZionIsrael

A tool for calculating the economic and environmental impacts of the use of byproducts of industrial processes that can substitute for perishable resources was *** 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 *** costs and benefits of such application were calculated using both a database and expert *** calculations assumed a representative assemblage of soils and crops,with weights assigned to each crop type and soil *** annual weighted benefits(additional income for the farmer)and costs per hectare reached 324$/ha and 131$/ha *** potential benefits include:Chemical fertilizer replacement,159$/ha;Improvement to the soil’s physical properties,75$/ha;Supply of vital trace elements,33$/*** potential costs were:Regulatory limitations on marketing of crops pending proof of absence of risk of heavy metals or radionuclides accumulation in these crops,(17$/ha and 36$/ha respectively);Application and incorporation cost,50$/*** presented estimates of the costs and benefits refer to the array of soils and conditions typical to *** 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

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