s) You are setting up a composting batch and have 8 tonnes (metric tons) of poultry litter with a C:N of 14, a dry weight % of N of 2.7%, density of 500 kg/m³, and a moisture content of 33%. You are aiming for a C:N of 25:1 for optimal composting performance, so you are considering several options of other wastes to make up your batch. The following table shows the moisture content, C:N and cost per tonne of each material. You estimate that you will lose 20% of the initial mass during the composting process. Determine which would provide the best return on investment if you can sell your compost for $80/m³ and the density of the finished compost is 400 kg/m³. Waste Type Shredded newsprint Sawdust RDF Moisture content C:N 152 530 60 18 40 45 Dry % N 0.2 0.1 1.1 Cost/tonne $200 $110 $80

s) You are setting up a composting batch and have 8 tonnes (metric tons) of poultry litter with a C:N of 14, a dry weight % of N of 2.7%, density of 500 kg/m³, and a moisture content of 33%. You are aiming for a C:N of 25:1 for optimal composting performance, so you are considering several options of other wastes to make up your batch. The following table shows the moisture content, C:N and cost per tonne of each material. You estimate that you will lose 20% of the initial mass during the composting process. Determine which would provide the best return on investment if you can sell your compost for $80/m³ and the density of the finished compost is 400 kg/m³. Waste Type Shredded newsprint Sawdust RDF Moisture content C:N 152 530 60 18 40 45 Dry % N 0.2 0.1 1.1 Cost/tonne $200 $110 $80

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter2: Municipal Solid Waste Characteristics And Quantities

Section: Chapter Questions

Problem 2.14P

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