Method for adsorbing and removing microscale antibiotic in livestock and poultry waste water by modified zeolite

Abstract

The invention discloses a method for adsorbing and removing microscale antibiotic in livestock and poultry waste water by modified zeolite, which belongs to the waste water treatment technical field. The method comprises the following steps: 1) biological pretreatment of livestock and poultry waste water; 2) zeolite modified treatment; and 3) adsorption and treatment of livestock and poultry waste water and the like. According to the invention, after the adsorption treatment by zeolite modified by nitric acid, hydrochloric acid and sulfuric acid, the removal rate of tetracycline antibiotics in livestock and poultry waste water can respectively reach 61.1%, 90.7% and 88.8%, but the removal rate of the natural zeolite are only 10.3%, 12.9% and 16.0% under the same condition, thereby the method of the invention has the characteristics of simple process flow, convenience, less investment, abundant material source, cheap and easily available material, low treatment cost and the like. The invention can be popularized and applied in large-scale livestock and poultry breeding enterprises.

Description

technical field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a method for removing trace antibiotics in livestock and poultry wastewater by using modified zeolite to adsorb and remove them. Background technique

[0002] In recent years, with the rapid development of domestic intensive livestock and poultry breeding industry, the problem of antibiotic pollution in livestock and poultry wastewater has become increasingly serious, and antibiotics in water bodies have become a major obstacle to the reuse of water resources. Because tetracycline antibiotics such as tetracycline, oxytetracycline, chlortetracycline, etc., which are widely used in livestock and poultry breeding industry, have good water solubility, most of them are still excreted in the original form after metabolism in the body, and are not easy to be destroyed in the environment. Because of biodegradation and other reasons, it is easy to be stored and accumulated in...