Ocean dumping of food wastewater in the Korean littoral sea since 2013 will be prohibited. Prohibition of ocean dumping of food wastewater will cause problems in future treatment method by a generator of food waste who fails to find any alternative f...
Ocean dumping of food wastewater in the Korean littoral sea since 2013 will be prohibited. Prohibition of ocean dumping of food wastewater will cause problems in future treatment method by a generator of food waste who fails to find any alternative for overland treatment. In the Ministry of Environment is promoting the overland treatment of all food wastewater through expansion of overland treatment facilities or use of the existing treatment facilities, etc by the end of the 2012 to comply with the London Convention, etc and will prevent the overalll disposal of wastes from 2013.
This study examined for possibility of the food wastewater incineration treatment method as one of overland treatment method by incineration through liquefied spray of food wastewater when incinerating life wastes under operation and for the relationship, etc of air discharge material discharged in incineration, and the results of study are as follow:
1. Design of a nozzle suitable for a structure within an incinerator and control of spray quantity must be achieved for incineration of food wastewater. It is also important not to prevent any damage of refractory bodies within the incinerator owing to food wastes and install a proper input device after understanding nature and state of food wastewater.
2. Concentration of nitrogen oxides(NOx) among air discharge gases was reduced by effect of ammoniac nitrogen (NH3-N) in food wastewater when inputting food wastewater into the incinerator as the quantity of food wastewater increased. It is because ammoniac nitrogen (NH3-N) reacts with nitrogen oxide and removes nitrogen oxides(NOx).
3. Concentration of air discharge gases such as sulfuric oxide (SOx) and heavy metal, etc except for nitrogen oxides(NOx) in incineration was not largely changed and the nozzle. With regard to spray quantity of food wastewater at a suitable position, stable incineration was performed without increased concentration of discharge gases such as carbon oxide (CO) since no incomplete burning within the incinerator occurred.
4. Concentration of dioxin during mixed incineration of food wastewater with MSW was average 0.0095 ng-TEQ/S㎥ and average concentration of dioxin generated in incineration of only MSW was 0.0075 ng-TEQ/S㎥, and no mixed incineration of food wastewater gave effect on dioxin concentration.
5. In the mixed incineration of food wastewater, generation speed of scales in the inside of a tubular exhaust gas boiler became rapid and the scale generation quantity became large but the exhaust gas boiler normally operated since scales were removed in cleaning of the tube with a compressive air cleaning facility and there was no opening clogging phenomena in a filter cloth of the filtering dust collector.
6. The overland treatment method, not ocean dumping of food wastewater can be proposed as a technology since mixed incineration of food wastewater with MSW in the existing life waste incineration plant is possible, and operation costs of the incineration facility were reduced since use of drugs such as ammonia and urinary hydrogen ion excretion, etc used in incineration facilities for removing nitrogen oxides(NOx) owing to reduced concentration of nitrogen oxides(NOx) of discharge gas in the mixed incineration.