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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Published on: May 19, 2019

Nutrient release from fish silage using microwave-enhanced advanced oxidation process.

Winnie I Chan1, K Victor Lo, Ping H Liao

  • 1Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada.

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
|January 9, 2009
PubMed
Summary
This summary is machine-generated.

Microwave-enhanced oxidation effectively treats fish silage, releasing nutrients like ammonia and reducing solids for fertilizer. Higher temperatures and hydrogen peroxide maximized nutrient release and decreased chemical oxygen demand.

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Area of Science:

  • Environmental Chemistry
  • Biotechnology
  • Sustainable Agriculture

Background:

  • Fish silage is a byproduct with potential fertilizer value.
  • Pre-treatment is necessary to enhance nutrient availability and reduce solids.
  • Advanced oxidation processes offer novel treatment solutions.

Purpose of the Study:

  • To evaluate microwave-enhanced advanced oxidation for fish silage treatment.
  • To optimize nutrient release and solids reduction for fertilizer production.
  • To determine the effects of temperature and hydrogen peroxide dosage.

Main Methods:

  • Utilized a microwave-enhanced advanced oxidation process.
  • Conducted 15 experiments varying hydrogen peroxide (H2O2) dosage and temperature.
  • Analyzed total Kjeldahl nitrogen, ammonia, nitrate/nitrite, and chemical oxygen demand (COD).

Main Results:

  • Up to 26% total Kjeldahl nitrogen released as ammonia with 6% H2O2 at 170°C.
  • Maximal nitrate/nitrite concentration of 10.2 mg/L achieved at 170°C and 6% H2O2.
  • Reduced total COD by up to 20.5% between 120°C and 170°C.
  • Volatile fatty acids generated at lower temperatures, increasing soluble COD.

Conclusions:

  • Microwave-enhanced advanced oxidation is a promising method for treating fish silage.
  • Optimized conditions enhance nutrient solubilization and solids reduction.
  • The process facilitates fish silage conversion into a viable fertilizer product.