Waste water treatment system of ultraviolet light and ozone micro/nanobubbles and method

Abstract

The invention relates to a waste water treatment system of ultraviolet light and ozone micro / nanobubbles, which comprises a raw water lifting pump, a reaction tank, an ultraviolet lamp casing pipe group, a micro / nanobubble generator and an ozone generator. The water inlet of the reaction tank is positioned at the upper part of the water inlet end of the reaction tank; a water outlet overflow weir is arranged at the upper part of the water outlet end of the reaction tank; the ultraviolet lamp casing pipe group is hung on an upper cover of the reaction tank; the water outlet overflow weir is respectively communicated with a water outlet valve of the reaction tank and the water inlet of the micro / nanobubble generator; the air inlet of the micro / nanobubble generator is connected with the ozone generator; and the micro / nanobubble generator leads produced air-water mixture into the reaction tank. The waste water treatment system adopts ultraviolet light and ozone micro / nanobubbles, improves the mass transfer performance of ozone, greatly improves the utilization rate of ozone, and reduces the output of tail gas. The particle size of ozone micro / nanobubble is small, the quantity of the ozone micro / nanobubbles is large, the retention time of the ozone micro / nanobubbles is long, and the ozone micro / nanobubbles can scrub the surface of an ultraviolet lamp casing pipe while being spread in water to prevent the adhesion or scaling of organic or inorganic pollutant.

Description

technical field [0001] The invention relates to the application technical fields of environmental protection, industrial water treatment, etc., in particular to a system and method for advanced treatment of acrylic wastewater by ultraviolet light and ozone micro-nano bubbles. Background technique [0002] At present, the domestic acrylic fiber production process can be divided into two categories: dry spinning and wet spinning, and wet spinning is divided into one-step process and two-step process. The two-step method has the obvious advantages of good product quality, low unit consumption of raw materials and less pollutant discharge. Most new projects adopt the localized two-step process. The treatment of domestic acrylic fiber industrial wastewater is generally unsatisfactory. However, the introduction of new organic additives that are difficult to biodegrade in the two-step process has added a new burden to the original biological treatment system, making the biodegrada...

AI Technical Summary

Problems solved by technology

The treatment of domestic acrylic fiber industrial wastewater is generally unsatisfactory

However, the introduction of new organic additives that are difficult to biodegrade in the two-step process has added a new burden to the original biological treatment system, making the biodegradability of acrylic wastewater worse, and the COD removal rate is only about 50%, or even lower. , and there is SCN in the effluent of the biological treatment system - 、CN - , AN oligomers and their monomers, nitriles, amines and other toxic substances, usually have a low BOD / COD value and poor biodegradability, and conventional methods such as ordinary filtration and flocculation have basically no effect, while activated carbon adsorption The cost of advanced treatment technology is too high, and membrane separation technology is also difficult to apply due to investment and operation problems such as high investment and membrane pollution.

Images