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This paper uses the closed circulatory coal gas of coking plant to replace water vapour of the traditional ammonia stripping method to treat coking wastewater containing ammonia. The removing rate of NH3-N is 99.57% in the intermittent experimentation, the target of NH3-N can reach the national discharging second standard. On the basis of this, by simulating industrialization continuous experimentation,...
Magnesium-ammonium-phosphate precipitation method (MAP) is a newly-developed technique to remove ammonia nitrogen from wastewater. In this study, MAP method has been studied by using MgCl2-6H2O and Na2HPO4-12H2O as precipitators for treating highly concentrated ammonia nitrogen wastewater. The effect of pH value, formulas of precipitation and precipitator ratio on MAP precipitation efficiency has...
The purpose of this study was to choose a fine chemical to efficiently remove ammonia nitrogen from the ammonia water in AS Process, which provides a new available approach to treat coking wastewater. The experiment adopted "Air Stripping and Adsorption" to remove ammonia nitrogen from the ammonia water, and studied the reaction temperature T, pH, the time of stripping t, the dosage of the...
Ammonia nitrogen is a common pollutant in water environment, and the nitrogen removal techniques have been studied extensively. In this work, a new kind of annular reactor was developed and the photocatalysis with suspended TiO2 was used for degradation of ammonia nitrogen. The effects of experimental conditions on the ammonia degradation efficiency and the photocatalytic products in the effluent...
Chemical precipitation with alum was employed as the post-treatment of a micro-aerobic EGSB system treating domestic wastewater to reduce TP concentration. Effectiveness evaluation focused on the influences of reaction/settling time, pH, coagulant dosage and temperature when original TP ranged in 2-8 mg/L. It was found that 20 min was appropriate for flocculation or sedimentation. Samples with original...
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