Burning fossil fuels increases greenhouse gas emissions and introduces more carbon dioxide into the atmosphere. This can be addressed using anaerobic digestion to convert biomass waste into biogas for energy. Anaerobic digestion is an efficient process where different types of bacteria break down organic waste into methane gas without oxygen. There are three main types of digesters - covered lagoons, complete mix digesters, and plug-flow digesters - that vary in their solid concentrations and mechanisms for waste breakdown and biogas collection. Anaerobic digestion has advantages such as being environmentally friendly, economically profitable, improving air quality, and reducing odors.

1. The burningfossilfuels are: More expensive; Increasegreenhousesgases; Introduce more carbondioxideinto the atmosphereToresolvethisproblemwe can usewastewithanaerobicdigestion.This system recyclingmanureto produce methanefor industrial purposes. Thisisanefficient and ingenious way to reduce greenhousegases, hence riduce global warming, whileproducingenergyfromwasteBURNING FOSSIL FUELS

2. The anaerobicdigestiontoconvertbiomasswastesasbionergytosanitizewastes. Anaerobicdigestion can take placeonly in an air tight chamberkept at temperature notlowerthan 20°c nothigher 65°c. There are 4 typesofbacteria:HYDROLYTIC BACTERIA: break down complexorganicwasteintosugar and aminoacids;

3. FERMENTATIVE BACTERIA: convertsugar and aminoacidsintoorganicacids;

4. ACIDOGENIC BACTERIA: convert the acidsintohydrogen, carbondioxide and acetate;

5. METHANOGENIC BACTERIA: produce biogas fromacetic acid, hydrogen and carbondioxide.ANAEROBIC DIGESTION

6. Biogas iscomposedby: 55-70% METHANECARBON DIOXIDE PLUCE TRACE AMOUNT OF WATER HYDROGE SULPHIDE (H2S) AMMONIA (NH3)BIOGAS

7. Digestiondipendby: pH;Water/solidratio;Carbon/ nitrogenratio (20/1 – 30/1)Particlesizeof the material beingdigested and its mixing;Amountofantibiotic in livestoockfeed.

8. There are 3 typesofdigester:COVERED LAGOON;COMPLETE MIX DIGESTER;PLUG-FLOWTYPE OF DIGESTER

9. They are:Environmentfriendly;Economicprofitable;Improvequalityof the air;Reducesodour and toxicgases (reducesodour 97%);Weedseed more than 90% of the patogens are destroyed.ADVANTAGES