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Wet air oxidation (WAO) is one of the most economical and environmentally-friendly advanced oxidation processes. It makes a promising technology for the treatment of refractory organic pollutants in industrial wastewaters. In wet air oxidation aqueous waste is oxidized in the liquid phase at high temperatures (125–320°C) and pressures (0.5–20MPa) in the presence of an oxygen-containing gas (usually...
Due to the enormous amount of fly ash and its pollution to environment, fly ash was investigated for preparation of coagulant. By measuring the Al3+ and Fe3+ solubility rate by changing the dosage of Na2CO3, it was concluded that the best ratio of Na2CO3 and fly ash was 0.8. At the condition of the best ratio, 805 and 1.5 h were recognized the best reaction temperature and reaction time. On the basis...
In order to explore new municipal sewage sludge treatment method and reduce its harm for environment, fly ash discarded from power plant was used as conditioner in sludge treatment in the paper. The properties of sewage sludge were changed after adding fly ash. The optimum fly ash amount 0.03 kg/kg was obtained through the compressive strength test. After adding optimum amount fly ash, the percentages...
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