BIOGAS: Introduction to Anaerobic Digestion

About this Course

Anaerobic digestion is a natural biological process where microorganisms convert complex carbohydrates into biogas in an oxygen free environment. Anaerobic digestion mineralizes nutrients and reduces odors, which enables farmers to apply digestate (the slurry that is removed from the digester after digestion) in places manure cannot be applied. A growing number of farms are using anaerobic digestion to treat manure as part of a manure management plan.

An anaerobic digester simulates the digestive process of the ruminant animal. Like the ruminant animal, an anaerobic digester uses fermenting bacteria to break down biomass into organic acids. These acids are converted into methane by methanogens. Biogas is typically 60 percent methane and 40 percent carbon dioxide, with some trace gases

Anaerobic bacteria break down complex carbohydrates in the feedstocks into organic acids that are used by methanogens to create biogas and slurry. The biogas is removed to produce natural gas, electricity or heat. The slurry is removed and land applied as a source of nutrients on growing crops or further processed into a filtrate or fiber product. Both present value added opportunities for farmers.

This module provides background information on the anaerobic digestion process, biogas and other products of anaerobic digestion, and on the energy applications of biogas. Possible environmental benefits and concerns associated with anaerobic digestion are described.


Learning Outcomes & Objectives:


  • Understand the biological process for producing biogas.
  • Discuss anaerobic digester applications for agricultural and wastewater systems, the situations that warrant an on-farm digester and the various digester size options that are available for a producer.
  • Describe the uses for digestate and biogas.
  • Discuss the environmental benefits and concerns associated with anaerobic digesters.


Course CodeUNN/OC/0060
Course Start DateStarted
Course Duration3 Months
Dedication2 hours per week
Number of Modules10
School offering courseUNN Online School of Oil and Gas
Video/Audio MediaNone
Course Fee200000.00

  Naira (₦)      US Dollar ($)    

Course Lecturers

Associated Programs

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UNN Online Program

Bioenergy Production Operations (Biogas, Biofuel and Biodiesel)

In this program, you will learn all about Bioenergy which comprises of Biogas, Biodiesel and Biofuel. Bioenergy is energy derived from Biomass; an organic based energy source supplying the worlds energy needs.

Program Courses: 10

Course Prerequisites / Requirements

Graduates of Universities are eligible to register for Post Graduate Diploma programs, and complete/pass all the modules. NCE and HND holders with a minimum of 3 years working experience, especially in the petroleum industry will be considered. WAEC holders or equivalent, can enroll and do as many individual modules as they wish.