Preparation method of environment-friendly sewage treatment agent

Abstract

The invention discloses a preparation method of an environment-friendly sewage treatment agent, which comprises the following steps: inoculating chlorella into a culture medium according to the inoculum size of 2 * 10 < 6 >-4 * 10 < 6 > per milliliter under an aseptic condition, and circularly and alternately culturing for 72 hours under illumination and darkness to obtain a microalgae culture solution; adjusting the pH value of the microalgae culture solution to 5-6.5, adding sodium citrate and magnetic chitosan powder, stirring for 35-50 minutes, adding calcium chloride, stirring for 60 minutes, centrifugally separating, and cleaning with sterile normal saline to obtain the environment-friendly sewage treatment agent. The invention belongs to the technical field of sewage treatment, and particularly relates to a preparation method of an environment-friendly sewage treatment agent convenient for subsequent recovery.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and specifically refers to a preparation method of an environment-friendly sewage treatment agent. Background technique [0002] With the large-scale development of my country's livestock and poultry breeding industry, nearly one billion tons of livestock and poultry breeding manure will be produced every year, which poses a serious threat to limited water resources. At present, there are two main treatment methods for aquaculture sewage: one is to use biogas digesters for anaerobic fermentation, but the huge amount of biogas slurry still contains high concentrations of nutrients such as nitrogen and phosphorus. The arable land for absorbing biogas slurry is becoming increasingly scarce, and the resulting biogas slurry is directly discharged into the water body, which will lead to severe eutrophication of the natural water body; the second is biological removal, and biological treatment ...

AI Technical Summary

Problems solved by technology

However, using microalgae to treat sewage requires recycling microalgae, otherwise it will also cause water pollution

[0004] The patent application with the patent number CN201711429008.X discloses a preparation method of a microalgae sewage treatment agent, which includes the following steps: under aseptic conditions, chlorella is 1×106 / mL-1×107 / mL The inoculum amount of mL is inoculated into the culture medium, under the conditions of temperature 25-27°C and rotation speed 110-130 rpm, alternating light and dark cycles for 60-75 hours to obtain microalgae culture fluid; microalgae culture fluid Adjust the pH value to 4.5-6, add sodium citrate, stir for 20-30 minutes, add calcium chloride, stir for 40-50 minutes, and centrifuge to obtain a microalgae sewage treatment agent, which can effectively remove Ammonia nitrogen in sewage, but recovery is more difficult