Why Biomass

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Graduate Category: Engineering and Technology Degree Level: Doctorate Abstract ID# 376

Mapping Urban Biomass Production for Food and Fuel Mithun Saha1, Lauren Martin2, Jane Amidon3, Matthias Ruth2 and Matthew Eckelman1 1Civil & Environmental Engineering, 2School of Public policy & Urban Affairs, 3School of Architecture, Email: [email protected]

Research Question

Background This study describes the geospatial cataloging and mapping of existing and potential locations and schemes for urban biomass for bioenergy production in Boston. Apparently, there is an increasing interest in producing bioenergy in the Northeast US because it is one of the few promising local renewable source of fuels that can be used both for heat and power.

Willow

Switch grass

Miscanthus

Poplar

• • • • •

Carbon neutral fuel Reduce GHG emission Reduce environmental impacts Cheap compared to other pollutant sources Widely available around the globe

Total Available land area in Boston = 12500 ha Box values indicate percentages of total available land areas for bioenergy crop production within the city limit.

20%

Spatial Analysis Urban land

ArcGIS Model Builder

Marginal Land

Slope (15%) and Soil Quality

Urban land

Shadow Analysis

Slope Analysis

Roof Sites

Why Biomass ? 50% of US renewable energy sources

Can Boston be self sufficient in food and fuel ?

Biomass Resources in Boston

ArcGIS 10.2 was used to perform the spatial analysis.

Energy crop Species

Yield (T/acre)

Switch grass

4

coppiced willow chips

4.7

MA forest wood chips, net of saw logs

1.1

Poplar

4-5

Miscanthus

5-15

Biomass Sources

Existing

Potential

10%

Existing Resources

Potential Resources

2%

30%

387ha 1146 ha

Public and private vacant lots

Potential rooftop sites

Biomass Sources

Biomass cycle

4804 ha Potential marginal lands

171 ha Community gardens

Methods Here we performed a manual analysis of high-resolution aerial images using Google Earth Pro and ArcGIS data layers to identify and analyze suitable parcels that include existing public and private vacant spaces, ground level as well as roof top community gardens, potential marginal lands with favorable soil quality and ground slopes and waste wood generation (C&D and yard trimmings).

Conclusion

Bioenergy Yield The resulting spatial datasets demonstrate that urban biomass production is an extensive land use type with wide variations in the distribution of sites across the city. The study results suggest opportunities for scaling up existing food production networks as well as identifying possible locations for biomass cogeneration within the city limits. 120

Bioenergy

Biomass = A ×Y

Crop Yield, Y

Moderate to high yield

45

GHG Emissions (KgCO2e/GJ)

Marginal Land, A

40 Yield (MT/ha)

Land

Spatial Analysis

50

35 30 25 20 15 10 5

Biomass products reduce GHG emission

100 80 60 40

Pallet Consumption Pellet Stove  Biomass mapping shows ‘Boston’ as a promising city for Bioenergy production.  Possible bioenergy sites will be identified.  Bioenergy productions within the city can reduce transportation related direct or indirect emission.

References  Taylor JR, Lovell ST. Mapping public and private spaces of urban agriculture in Chicago through the analysis of high-resolution aerial images in Google Earth. Landsc Urban Plan. 2012 Oct;108:57–70.  Wilson TO, McNeal FM, Spatari S, G. Abler D, Adler PR. Densified Biomass Can Cost-Effectively Mitigate Greenhouse Gas Emissions and Address Energy Security in Thermal Applications. Environ Sci Technol. 2012 Jan 17;46(2):1270–7.

Acknowledgement

20 0

0 Switchgrass

Poplar

Willow

Energy Crops

Miscanthus

Heating Oil

Natural Gas

Pellets

Briquettes

Cubes

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