Method for carrying out nitrogen and phosphorus resource recovery and carbon neutralization by coupling filamentous algae after moderately nitrifying high-concentration ammonia-nitrogen wastewater

Abstract

The invention belongs to the field of resource engineering or biological environment engineering, and relates to a method for carrying out nitrogen and phosphorus resource recovery and carbon neutralization by coupling filamentous algae after moderately nitrifying high-concentration ammonia-nitrogen wastewater. The method comprises the following specific steps: firstly, filamentous algae species are cultured, then the highest tolerant ammonia nitrogen concentration of the selected filamentous microalgae is determined, and the filamentous microalgae in wastewater is domesticated and cultured; after being subjected to primary treatment, the wastewater enters a biochemical pool, high-concentration ammonia nitrogen is moderately converted through the nitrification effect of nitrifying bacteria so as to remove the poisoning and growth inhibition effect of the high-concentration ammonia nitrogen on microalgae, and after the ammonia nitrogen concentration is converted and reduced to the highest tolerance concentration of filamentous microalgae, a supernate is taken for culturing the filamentous microalgae after sedimentation; the filamentous microalgae utilize CO2 as a carbon source to generate oxygen through photosynthesis; meanwhile, ammonium nitrogen can be utilized for biomass accumulation, nitrogen and phosphorus elements can be rapidly absorbed and converted into biomass energy in organisms, and nitrogen and phosphorus water resource recovery and carbon neutralization are achieved.

Description

technical field [0001] The invention belongs to the field of resource engineering or biological environment engineering, and specifically relates to a method for recovering nitrogen and phosphorus resources and neutralizing carbon by coupling filamentous algae culture with high-concentration ammonia nitrogen wastewater after moderate nitrification. Background technique [0002] Due to their unique ecological viability and high nutrient scavenging capacity, microalgae are considered to be a promising method for treating sewage, such as domestic sewage, landfill leachate, agricultural wastewater (eg: milk and meat slaughtering processing wastewater), even petrochemical wastewater that is difficult to degrade. Studies have reported that the microalgae treatment system can reduce total nitrogen and total phosphorus to 2mg / L and 0.1mg / L. However, although microalgae treatment of wastewater is cheap and does not cause secondary pollution, few microalgae-based wastewater treatment...

AI Technical Summary

Problems solved by technology

In order to remove ammonia inhibition, wastewater is usually diluted, but this not only consumes more water resources, but also does not meet the research purpose of reducing water consumption

In traditional sewage treatment, ammonia nitrogen is mainly removed by physical stripping or converted into nitrate / nitrite nitrogen by nitrifying bacteria, which is then converted into nitrogen by denitrifying bacteria to remove it, causing energy and nitrogen loss.

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