Integrating Small Scale Digestion Systems in Developing Regions

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People in developing countries regularly lack access to energy or their energy source is not reliable. Low cost anaerobic digestion systems have the potential to provide methane to be used in a variety of end uses. Unfortunately, many low cost systems are not evaluated and it is unclear if they are living up to the expectations of the end users or those that are promoting or financially supporting their installation.…

Manure Treatment Technology Proceedings for Waste to Worth 2013

W2W13 proceedings | Waste to Worth home
On this page: Anaerobic Digestion | Composting | Separation |
Vegetative | ThermalNutrient Recovery


Composting Thermal Technologies & Biochar

In Vessel Composting of Horse Manure (Case Study)

Financial Benefits of Composting Stable Waste

Effect of Fractionation and Pyrolysis on Fuel Properties of Poultry Litter

Developing Alternative Markets for Poultry Litter Biochar

The Farm Manure to Energy Initiative

Solid-Liquid Separation Nutrient Recovery

Solid-Liquid Separation Alternatives for Manure

Benefits of Liquid-Solid Separation with Lagoons

Recovery of Phosphorus from Solid Manure
Vegetative Treatment Systems (VTS)  

Automating Management for a VTS


 Anaerobic Digestion

Cattle Manure/Solid Manure Feedstocks

Anaerobic Digestion of Finishing Cattle Manure

Trickle Flow Leach Bed Reaction for Solid Cattle Waste

Pilot Scale Leach-bed Multistage Digester for Dry-lot Wastes

Dry Anaerobic Digestion (AD) for High Solids Manure

Feasibility at Cattle Operations and Demonstrations of a Decision Support Tool

Valuing Feedstocks–Balancing Energy Potential & Nutrient Content

Improving Methane from Manure Solids through Pretreatment

Co-Digestion and Operational Issues

Dairy Manure Digestion Influenced by Wasted Milk

Systems Nutrient Recovery

Design, Construction, and Implementation of a Pilot Scale Digester

Coupling Dairy Manure Digesters with Commercial Greenhouses

On-Site Analytical Laboratories to Monitor Process Stability

Operation of Internal Combustion Engines

Economical Recovery of Ammonia from Digestate
Pathogens Uses for Solids

Inactivation of Dairy Manure-borne Pathogens

Organic Mulches in Ginseng Production



Poultry Digestion – Emerging Farm-Based Opportunity

While EPA AGSTAR has long supported the adoption of anaerobic digestion on dairies and swine farms, they have not historically focused on the use of anaerobic digestion on egg laying and other poultry facilities. This has been because the high solids and ammonia concentrations within the manure make anaerobic digestion in a slurry-based system problematic.…

Effects of Mixing Duration on Biogas Production and Methanogen Distribution in Dairy Manure Anaerobic Digesters

Why Did We Study Mixing Duration?

Mixing is an important parameter for anaerobic digesters for both design and operation. This is especially true for digesters that treat diary manure, which is a mixture of feces, urine, blood, food wastes, and bedding. Many of the solids fed to the digester have no or low degradability, and some of the large fibers can clog pumps or pipes in the transfer system.…

Low Tech Waste to Energy Applications in Developing Countries


Animal waste is fully utilized in most developing countries, particularly in Afghanistan, Pakistan and Sri Lanka.  Utilization of animal waste for energy, cooking and heating is often of greater importance than use for soil conditioning and fertilization.  The simplest processing of manure, including gut waste from slaughter operations, is to sun-dry the material which is then burned in small, efficient clay burners. …

Farm-Based Anaerobic Digestion Projects – Wastewater Disposal and Nutrient Considerations

While anaerobic digestion is often touted for producing renewable energy/fuels, producers at concentrated animal feeding operations (CAFOs) are often most concerned about nutrient loading, an issue that has garnered increasing regulatory scrutiny. Anaerobic digestion, while a carbon management tool capable of producing carbon fuels, does little in regard to nitrogen and phosphorus management.…