Inter-American Development Bank
facebook
twitter
youtube
linkedin
instagram
Abierto al públicoBeyond BordersCaribbean Development TrendsCiudades SosteniblesEnergía para el FuturoEnfoque EducaciónFactor TrabajoGente SaludableGestión fiscalGobernarteIdeas MatterIdeas que CuentanIdeaçãoImpactoIndustrias CreativasLa Maleta AbiertaMoviliblogMás Allá de las FronterasNegocios SosteniblesPrimeros PasosPuntos sobre la iSeguridad CiudadanaSostenibilidadVolvamos a la fuente¿Y si hablamos de igualdad?Home
Citizen Security and Justice Creative Industries Development Effectiveness Early Childhood Development Education Energy Envirnment. Climate Change and Safeguards Fiscal policy and management Gender and Diversity Health Labor and pensions Open Knowledge Public management Science, Technology and Innovation  Trade and Regional Integration Urban Development and Housing Water and Sanitation
  • Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

Caribbean Development Trends

  • HOME
  • CATEGORIES
    • Agribusiness
    • Antigua and Barbuda
    • Barbados
    • BehaviorChange
    • Belize
    • Bermuda
    • biodiversity
    • Blockchain
    • Caribbean
    • Caribbean Culture and Media
    • Climate Change
    • Creative Economy
    • Crime Prevention and Citizen Security
    • Data and Knowledge
    • De-risking
    • Dominica
    • Dutch
    • Early Childhood Development
    • Economic Growth
    • Education Policy
    • energy
    • entrepreneurship
    • Environmental and Climate Change
    • Events
    • Extractives
    • Finance
    • Fiscal Rules
    • gender
    • Governance and Regulatory Policy Reforms
    • Grenada
    • Guyana
    • Haiti
    • Health
    • Health Policy
    • Hurricane
    • Hurricane Irma
    • infrastructure
    • Innovation and change
    • Intellectual Property
    • IWD
    • Jamaica
    • JumpCaribbean
    • Labor
    • Labour Markets
    • MOOC
    • Music
    • Natural Disasters
    • Nurturing Institutions
    • OECS
    • Podcast
    • Poverty
    • Private Sector and Entrepreneurship
    • Saint Kitts and Nevis
    • Saint Lucia
    • Saint Vincent and Grenadines
    • skills
    • Sports for Development
    • Suriname
    • Technology
    • The Bahamas
    • The Blue Economy
    • Transportation
    • Tourism
    • Trinidad and Tobago
    • Uncategorized
    • VAWG
    • Webinar
    • women
    • Women for Change
    • youth
  • Country Offices
    • Bahamas
    • Barbados
    • Guyana
    • Jamaica
    • Suriname
    • Trinidad and Tobago
  • Press Releases
    • Bahamas
    • Barbados
    • Guyana
    • Jamaica
    • Suriname
    • Trinidad and Tobago
  • Authors

Biomass Gasification: An Option to Reduce Energy Costs in Rice Milling

January 22, 2016 by lmaparicio Leave a Comment


Photo courtesy Mark Wenner. View of Rice husk intake into top of gasifier

by Luis Miguel Aparicio and Mark Wenner

 

Many agroprocessing activities require significant amounts of energy to produce the food and beverages we consume.  In the case of rice milling, energy is needed to dry unhulled rice to an ideal moisture level of 14%, to separate the husk from the grain, to polish the grain, and in some cases to parboil the grain, and then bag the rice.  According to the Guyana Rice Exporters and Millers Association, energy constitutes 20-22 percent of all costs, excluding the cost of purchasing paddy from individual rice producers.  The typical energy requirements in rice mills are heat generation and electricity: heat to dry the raw material and operate boilers and electricity to operate machines that peel, sort and pack.

In Guyana the cost of electricity averages 31 US$ cents per kilowatt hour (kWh) which is considerably more than .12 US$/kWh in the United States and the .08 US$/kWh in India and above the typical .20 US$/kWh for the rest of Latin America according to 2011 data.   In addition, fluctuations in voltage are common in Guyana, and large spikes can damage machinery and lead to reduced lifespans for the equipment or the need for more frequent repairs and capital expenditures, all of which add to operational costs of any industry and reduce productivity and profitability.

Considering the disadvantages of acquiring power from the grid, most rice mills in Guyana rely on standalone power generation based on fossil fuels, which is an expensive alternative.  A U.S. gallon of diesel costs US$3.51 in Guyana and diesel generators are not known for efficiency.

Agricultural and agroprocessing waste (e.g. cotton and corn straw, rice straw and husks, sunflower oil cake residues, coconut shell, sugar cane bagasse, brewery and distillery residues) and other types of biomass wastes (e.g. animal manure, wood chips, forestry and forest industry waste, food and paper industry residues, municipal green residues, dried sewage sludge), even municipal solid waste are utilized around the globe for heat and power generation at different  scales. The most common methods are direct combustion for operation of boilers that produce steam for heating and operating high pressure turbines; and biogas production for subsequent combustion and gasification processes.

One rice miller in Guyana, Ramesh Ramlakhan, decided to lessen dependence on diesel fuel and reduce energy costs.   He invested in a gasifier that produces 350 kWh of electricity by burning 350kg/h of rice husk, a “waste product”.    The investment is paying off handsomely, reducing the consumption of diesel fuels by 60%: the generator consumes 55 gallons in 4 hours when running on diesel only, whereas while using syngas it consumes 20 gallons in the same time. The systems’ energy efficiency could be improved if the diesel generator were replaced for a gas one.

The rice husks represent a problem for the millers who need to transport the husks for open burning in the fields, generating an additional operational cost and emitting greenhouse gases that produce global warming, with no benefit.

Thermochemical gasification is essentially a partial oxidation process wherein carbon rich material is converted into a synthesis gas composed mainly of carbon monoxide (CO), methane (CH) and hydrogen (H) along with contaminants such as tars, char, and ash.  The mix of gases is known as a ‘producer gas’ or ‘syngas’.   The gas can then be used to produce heat or to run machines; it can also be used as a feedstock for petrochemical and refining industries

The fundamental elements of gasification to energy plant include

  1. feedstock preparation, which may involve shredding, drying and even briquetting, and is particularly important when there is more than one type of biomass used and/or if it is not dry or if it’s too bulky;
  2. gasifier, where the controlled combustion and the high temperature chemical processes occur to produce the combustible gas;
  3. a gas cleanup system, necessary to remove harmful compounds (ash) and to dry the combustible gas; and
  4. an energy production system, where the gas can be combusted.

Additionally, a heat recovery system can be installed allowing for the use of the otherwise wasted heat energy.

The use of bioenergy is a viable means to improve energy efficiency and reduce greenhouse gas emissions.  Multilateral development institutions and bilateral donors can do much to popularize this technology. The technology is highly scalable and can be used from small scale—a stove, to medium-scale– power for one processing plant; to large scale as a source of energy for entire communities or for selling to national grids.  Multiple examples of large scale power and heat generation based on biomass are available in Europe (Spain, UK, Germany, and Italy), Turkey, Viet Nam, India and the US.  This is a technology worthy of further study and application in the LAC region, especially in the Caribbean where energy costs are so high.

2
Photo courtesy Mark Wenner. View of  gas cleaning system

3

Photo courtesy Mark Wenner. External view of  gasifier, and mount of rice husk  that that is used as feedstock. Tractor and trailer captures ash, a  byproduct,  that is used as fertilizer in rice fields.

 

Follow us on Twitter: @IDB_CarDevTrend


Filed Under: Climate Change & Environment, Guyana Tagged With: Bioenergy, biomass gasification, clean energies, climate change mitigation, energy efficiency, gasification, Guyana, rice mills, sustainable agroprocessing, technology

lmaparicio

Luis Miguel is a forest engineer from Universidad Nacional Agraria La Molina, in Peru; has a BSc in forest science, and a MSc in forest resources conservation from the same university, a diploma on environmental resources management & sustainable development from Hiroshima University, and a diploma in forest certification from Swedish University of Agricultural Sciences. Has worked in more than a dozen countries and his areas of expertise include climate change, natural resources policy and management. Among other positions, has been the technical coordinator of the General Directorate of Forestry and Wildlife in Peru, lead auditor of FSC forest management and forest chain-of-custody projects, forestry expert and validator/verifier for CDM and VCS emission reductions projects, programs of activities and REDD+ jurisdictional programs. Currently works as a consultant for the Climate Change Division of the Inter-American Development Bank.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Follow Us

Subscribe

Search

Caribbean Dev Trends

We provide unique and timely insights on the Caribbean and its political, social, and economic development. At the IDB, we strive to improve lives in the Caribbean by creating vibrant and resilient economies where people are safe, productive and happy.

Similar posts

  • Dispatches from the Front Line: The Caribbean Struggle for Energy
  • How can Jamaica lower the costs of energy? (Part I)
  • Saint Kitts and Nevis’ Energy Market
  • Guyana’s Energy Market
  • Antigua and Barbuda’s Energy Market

Footer

Banco Interamericano de Desarrollo
facebook
twitter
youtube
youtube
youtube

    Blog posts written by Bank employees:

    Copyright © Inter-American Development Bank ("IDB"). This work is licensed under a Creative Commons IGO 3.0 Attribution-NonCommercial-NoDerivatives. (CC-IGO 3.0 BY-NC-ND) license and may be reproduced with attribution to the IDB and for any non-commercial purpose. No derivative work is allowed. Any dispute related to the use of the works of the IDB that cannot be settled amicably shall be submitted to arbitration pursuant to the UNCITRAL rules. The use of the IDB's name for any purpose other than for attribution, and the use of IDB's logo shall be subject to a separate written license agreement between the IDB and the user and is not authorized as part of this CC- IGO license. Note that link provided above includes additional terms and conditions of the license.


    For blogs written by external parties:

    For questions concerning copyright for authors that are not IADB employees please complete the contact form for this blog.

    The opinions expressed in this blog are those of the authors and do not necessarily reflect the views of the IDB, its Board of Directors, or the countries they represent.

    Attribution: in addition to giving attribution to the respective author and copyright owner, as appropriate, we would appreciate if you could include a link that remits back the IDB Blogs website.



    Privacy Policy

    Copyright © 2025 · Magazine Pro on Genesis Framework · WordPress · Log in

    Banco Interamericano de Desarrollo

    Aviso Legal

    Las opiniones expresadas en estos blogs son las de los autores y no necesariamente reflejan las opiniones del Banco Interamericano de Desarrollo, sus directivas, la Asamblea de Gobernadores o sus países miembros.

    facebook
    twitter
    youtube