Device and method for synchronous treatment of ship waste gas desulfurization, denitrification waste liquid and ship domestic sewage

Abstract

The invention provides a device and a method for synchronously treating ship waste gas desulfurization, denitrification waste liquid and ship domestic sewage. The device includes a suspension area and a packing area. The upper part of the suspension area is provided with an overflow port to communicate with the filling area, the liquid inlet is connected to the suspension area, and the liquid outlet is connected to the packing area. There is an agitator in the suspension area. The inclined baffles are respectively fixed, and the filling area is sequentially provided with a ceramic ring layer, an activated carbon layer and a polyethylene multi-faceted hollow sphere layer from top to bottom. In the present invention, the mixed solution of exhaust gas washing waste liquid and domestic sewage from ships is pumped in, and after being fully contacted with the heterotrophic activated sludge mainly composed of sulfate-reducing bacteria in the suspension area after being stirred by an agitator, the overflow from the upper part of the suspension area The orifice enters the packing area, passes through each packing layer in turn, and is discharged from the water outlet at the bottom of the packing area after fully contacting with the biofilm. The method of the invention does not add carbon source, and realizes the synchronous treatment of ship waste gas desulfurization, sulfate and nitrite in denitrification waste liquid and organic matter in ship domestic sewage.

Description

technical field [0001] The invention relates to a device and method for treating ship exhaust gas desulfurization and denitrification waste liquid, in particular to a device and method for synchronously treating ship exhaust gas desulfurization, denitrification waste liquid and ship domestic sewage. Background technique [0002] Air pollution caused by ship exhaust gas is becoming more and more serious, which has attracted the attention of international organizations and countries. In order to deal with the pollution of ship exhaust gas, the International Maritime Organization (IMO) formulated the "MARPOL73 / 78 Anti-pollution Convention", which put SO X and NO X Listed as the primary pollutants to be controlled, SO X and NO X emission control area. Since 2014, my country's Ministry of Environmental Protection has also launched a phased limit for ship engine exhaust pollutants, and set up ship emission control areas in key waters around the Bohai Sea, the Yangtze River Del...

AI Technical Summary

Problems solved by technology

The conventional biological desulfurization treatment method is represented by the sulfate reduction process, which needs to add additional organic matter to supply sulfate-reducing bacteria as a carbon source, and its operating cost is greatly increased

However, the content of organic matter in ship exhaust gas washing liquid is extremely low. Therefore, the addition of additional organic carbon sources has become the main factor limiting the application of anaerobic biological methods in the treatment of ship exhaust gas washing liquid.

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