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Design Technology for Bioenergy Conversion of Organic Fraction of Municipal Solid Waste

  • Anthony Njuguna Matheri
  • Charles Mbohwa
  • Mohamed Belaid
  • Jane Catherine Ngila
Chapter
Part of the Green Energy and Technology book series (GREEN)

Abstract

In this study, we investigated the use of a laboratory batch anaerobic digester technology, for biochemical methane potential (BMP) and the bioenergy process design from anaerobic co-digestion of different organics fraction of municipal solid waste (OFMSW) originating from the city’s landfills. The carbon-to-nitrogen (C/N) ratio of OFMSW was found to be below 13. Through co-digestion, the C/N ratio settled at 14. Laboratory experimental data from 500 ml batch anaerobic digester operating at mesophilic temperature of 37 °C and pH of 7 had good productivity of methane of average 59.49% with (54–62%) recommended in the literature and was used to derive volume of digester and surface area. Via the application of the simple multi-attribute rating (SMART) technique of multiple-criteria decision analysis (MCDA) as a decision support tool, the most preferred model option for bioenergy design technology was selected from a list of potential alternatives available in the market. The geometry of the biodigester parameters was comparable with the process.

Keywords

Anaerobic digestion Co-digestion Energy Mesophilic temperature OFMSW Process design 

Nomenclature

AD

Anaerobic digestion

AMPTS II

Automatic methane potential test system

AHP

Analytic hierarchy process

APHA

American Public Health Association

BMP

Biochemical methane potential

CaCO3

Calcium carbonate

CO2

Carbon dioxide

C/N

Carbon to nitrogen

CBR

Case-based reasoning

CSTR

Continuous stirred tank reactor

CM

Cow manure

D

Diameter of the tank

DM

Dry matter

DS

Dry solid

f

Height of dome

GHG

Greenhouse gas

H

Height of the digester

HRT

Hydraulic retention time

MCDA

Multiple-criteria decision analysis

MSW

Municipal Solid Waste

OFMSW

Organics fraction of municipal solid waste

PEETS

Process Energy and Environmental Technology Station

Q

Volumetric flow rate

r

Radius of the digester

S1

Surface area of the digester top dome

SMART

Simple multi-attribute rating

NaOH

Sodium hydroxide

TS

Total solid

UASB

Up-flow anaerobic sludge blanket

V1

Volume of the digester top dome

V2

Volume of the digester cylinder

VS

Volatile solids

Vr

Volume of the digester

Notes

Acknowledgements

The authors are grateful to the City of Johannesburg, Pikitup, Robinson landfill, Johannesburg Market, Thabo Maahlatsi, Mlawule Mashego, Ms. Ireen Maile, and Renewable energy team members through the Process Energy and Environmental Technology Station (PEETS) at the University of Johannesburg for supporting this research.

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Anthony Njuguna Matheri
    • 1
  • Charles Mbohwa
    • 2
  • Mohamed Belaid
    • 1
  • Jane Catherine Ngila
    • 3
  1. 1.Department of Chemical EngineeringUniversity of JohannesburgJohannesburgSouth Africa
  2. 2.Department of Mechanical EngineeringUniversity of JohannesburgJohannesburgSouth Africa
  3. 3.Department of Applied ChemistryUniversity of JohannesburgJohannesburgSouth Africa

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