Full-scale application of focused-pulsed pre-treatment for improving biosolids digestion and conversion to methane

Bruce Rittmann, Hyung Sool Lee, Husen Zhang, Jared Alder, James E. Banaszak, Ronald Lopez

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

We tested at full-scale the innovative Focused Pulsed (FP) technology for pre-treating waste sludge in order to improve methane gas production and biosolids reduction in sludge digestion, but without incurring problems of odors, toxicity, and high costs for chemical or energy consumption. FP pre-treatment of a mixture of primary and secondary sludge increased the soluble COD by 160% and DOC 120% over the control. FP pre-treatment of 63% of the input waste sludge increased biogas production by over 40% and reduced biosolids requiring disposal by 30% when compared to the plant baseline. FP pre-treatment also correlated with a shift of the bacterial and archaeal communities. The most significant change was that the acetate-cleaving Methanosaeta became the dominant methanogen. Full FP pre-treatment should increase biogas production and biosolids removal by 60% and 40%, respectively. Full FP pre-treatment should generate energy benefits of at least 2.7 times and as high as 18 times the FP energy input, depending on heat recovery from FP treatment. For a plant treating 76,000 m3/d of wastewater (380 m3-sludge/d), FP treatment should generate an annual economic benefit of approximately $540,000 net of electricity and other operating and maintenance costs. This represents a payback period of three years or less.

Original languageEnglish (US)
Pages (from-to)1895-1901
Number of pages7
JournalWater Science and Technology
Volume58
Issue number10
DOIs
StatePublished - 2008

Fingerprint

Biosolids
biosolid
digestion
Methane
methane
sludge
Biogas
Sludge digestion
biogas
Methanogens
Odors
Waste heat utilization
Waste disposal
Toxicity
Costs
Wastewater
Energy utilization
Electricity
gas production
cost

Keywords

  • Anaerobic digestion
  • Energy recovery
  • Focused pulse
  • Methane
  • Pulsed electric fields
  • Sludge pre-treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Cite this

Full-scale application of focused-pulsed pre-treatment for improving biosolids digestion and conversion to methane. / Rittmann, Bruce; Lee, Hyung Sool; Zhang, Husen; Alder, Jared; Banaszak, James E.; Lopez, Ronald.

In: Water Science and Technology, Vol. 58, No. 10, 2008, p. 1895-1901.

Research output: Contribution to journalArticle

Rittmann, Bruce ; Lee, Hyung Sool ; Zhang, Husen ; Alder, Jared ; Banaszak, James E. ; Lopez, Ronald. / Full-scale application of focused-pulsed pre-treatment for improving biosolids digestion and conversion to methane. In: Water Science and Technology. 2008 ; Vol. 58, No. 10. pp. 1895-1901.
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