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

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
W I ChanPing H Liao

Abstract

The microwave-enhanced advanced oxidation process was used to treat fish silage for nutrient release and solids reduction prior to its use as a fertilizer for greenhouse operations. Fifteen sets of experiments with varying hydrogen peroxide dosages and treatment temperatures were conducted to evaluate the effectiveness of the process on the solubilization of fertilizer constituents. It was found that up to 26% of total Kjeldahl nitrogen could be released as ammonia with 6% hydrogen peroxide dosage at 170 degrees C. An increase of nitrate/nitrite concentration was observed with higher hydrogen peroxide dosage and higher microwave temperature; the highest concentration of 10.2 mg L(- 1) nitrates/nitrites was achieved at at 170 degrees C and 6% H(2)O(2) dosage. Up to 20 +/- 9.5% of total chemical oxygen demand was reduced at temperatures between 120 and 170 degrees C. Large quantities of volatile fatty acids were generated at lower temperatures, corresponding to an increase in soluble chemical oxygen demand, but not at higher temperatures. The treatment of fish silage using the microwave-enhanced advanced oxidation process appears to be promising.

References

Sep 27, 2006·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Wayne T WongKwang V Lo
Nov 30, 2006·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Winnie I ChanKwang V Lo
Apr 25, 2007·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ping H LiaoWayne T Wong
May 3, 2007·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Wayne T WongPing H Liao
May 3, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Winnie I ChanPing H Liao

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Citations

Oct 26, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Yang YuKwang V Lo
Apr 12, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ulisses M Nascimento, Eduardo B Azevedo

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