A Method for Effectively Removing Ammonia Nitrogen in Polluted Water

Abstract

The invention provides a method for effectively removing ammonia nitrogen from a polluted water body, which comprises the following steps of: removing large suspended particles from source water polluted by a nitrogen source by the conventional drinking water treatment process; introducing into a modified nitrifying bacteria immobilization filter to remove the ammonia nitrogen by using immobilized nitrifying bacteria; and performing loading modification and nitrifying bacteria immobilization on activated carbon used in the nitrifying bacteria immobilization filter. By the method, the ammonia nitrogen in micro-polluted source water can be effectively removed at normal temperature and at a low temperature; meanwhile, operating cost is obviously reduced; the active element iron loaded by theactivated carbon is favorable for improving the ammonia nitrogen adsorption property of the activated carbon; and the nitrifying bacteria are stably attached. The method is suitable for treating water bodies with different pollution degrees, and is good in effect and wide in application range.

Description

technical field [0001] The invention relates to a water treatment method, mainly an advanced treatment method for drinking water, specifically a method for effectively treating source water polluted by nitrogen sources. Background technique [0002] In recent years, the environmental pollution of surface water in our country is worrying, and the water quality is declining year by year. Among the pollutants exceeding the standard, the frequency of ammonia nitrogen is very high. The safety of domestic water will be included in the country's binding control indicators for the discharge of major water pollutants in the "Twelfth Five-Year Plan". Aiming at the pollution of ammonia nitrogen, my country's newly promulgated drinking water hygiene standard (GB5749-2006) stipulates that ammonia nitrogen is equivalent to adopting foreign standards, and stipulates that ammonia nitrogen (in NH 3 The standard value of 0.5mg / L. [0003] Researchers have made some progress in the treatment...

AI Technical Summary

Problems solved by technology

On the one hand, affected by water quality, water volume impact and environmental factors in the actual application process, the growth of dominant nitrifying bacteria on the surface of activated carbon is inhibited, resulting in a decrease in the number and activity of dominant nitrifying bacteria, and a decrease in the biodegradation of the bacteria. The removal performance of ammonia nitrogen is reduced, and even the dominant nitrifying bacteria are eliminated in the system due to inactivation; on the other hand, the adhesion of nitrifying bacteria is not strong enough and is easy to be washed away, which affects the safety of water supply

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