Publication detail

Review on the characteristic and feasibility of leachate for biogas production by anaerobic digestion

Bong, C.C.P. Lim, L.Y. Lee, C.T. Ho, W.S. Ho, C.S. Klemeš, J.J.

English title

Review on the characteristic and feasibility of leachate for biogas production by anaerobic digestion

Type

conference paper

Language

en

Original abstract

The sound handling of municipal solid waste (MSW) is of high priority to minimise environmental degradation and pollution. MSW can be treated via various technologies including landfilling, incineration, composting, anaerobic digestion (AD) and more. Landfill without landfill gas capturing serves as an enclosed bioreactor to store and stabilise waste. Other technologies such as incineration, composting and AD allow substantial volume reduction and generate value-added products. The treatment for MSW is commonly focusing on the solid part. Organic waste contains high moisture content of 70 – 90 %. The pressing of the water content before entering treatment unit, the release of water during and after the treatment, can generate high strength wastewater, known as leachate. Leachate is rich in organic matter, organic pollutants, pathogens, heavy metals and more, which can lead to severe secondary environmental pollution if not properly treated. Leachate from different treatment units showed certain unique characteristics, such as high Na, high Ca, different species and availability of heavy metals. This review summarised some of the important characteristics of different leachates and the suitability of AD as a mean of treatment. The efficiency of AD to treat leachate was presented in terms of the removal efficiency of chemical oxygen demand (COD) and biogas production. The COD removal efficiency was between 60 – 98 %, following the treatment of different leachates under different reactors and operational parameters. Among the different stream of leachates, the leachate from landfill is most commonly studied as a co-digestion substrate for AD, as compared to leachate from the composting facility.

English abstract

The sound handling of municipal solid waste (MSW) is of high priority to minimise environmental degradation and pollution. MSW can be treated via various technologies including landfilling, incineration, composting, anaerobic digestion (AD) and more. Landfill without landfill gas capturing serves as an enclosed bioreactor to store and stabilise waste. Other technologies such as incineration, composting and AD allow substantial volume reduction and generate value-added products. The treatment for MSW is commonly focusing on the solid part. Organic waste contains high moisture content of 70 – 90 %. The pressing of the water content before entering treatment unit, the release of water during and after the treatment, can generate high strength wastewater, known as leachate. Leachate is rich in organic matter, organic pollutants, pathogens, heavy metals and more, which can lead to severe secondary environmental pollution if not properly treated. Leachate from different treatment units showed certain unique characteristics, such as high Na, high Ca, different species and availability of heavy metals. This review summarised some of the important characteristics of different leachates and the suitability of AD as a mean of treatment. The efficiency of AD to treat leachate was presented in terms of the removal efficiency of chemical oxygen demand (COD) and biogas production. The COD removal efficiency was between 60 – 98 %, following the treatment of different leachates under different reactors and operational parameters. Among the different stream of leachates, the leachate from landfill is most commonly studied as a co-digestion substrate for AD, as compared to leachate from the composting facility.

Keywords in English

Air pollution; Anaerobic digestion; Biogas; Biological water treatment; Chemical oxygen demand; Efficiency; Heavy metals; Municipal solid waste; Organic pollutants; Waste incineration; Wastewater treatment; COD removal efficiency; Composting facilities; Environmental pollutions; High moisture contents; High strength wastewater; Municipal solid waste (MSW); Operational parameters; Removal efficiencies; Leachate treatment

Released

01.05.2018

Publisher

Italian Association of Chemical Engineering - AIDIC

ISBN

978-88-95608-61-7

ISSN

2283-9216

Book

Chemical Engineering Transactions

Volume

63

Number

63

Edition number

63

Pages from–to

73–78

Pages count

6

BIBTEX


@inproceedings{BUT151631,
  author="Jiří {Klemeš},
  title="Review on the characteristic and feasibility of leachate for biogas production by anaerobic digestion",
  booktitle="Chemical Engineering Transactions",
  year="2018",
  volume="63",
  number="63",
  month="May",
  pages="73--78",
  publisher="Italian Association of Chemical Engineering - AIDIC",
  isbn="978-88-95608-61-7",
  issn="2283-9216"
}