UASB external circulation temperature and PH regulating system

Abstract

The invention relates to the field of the sewage treatment and in particular to a UASB external circulation temperature and PH regulating system. The UASB external circulation temperature and PH regulating system comprises a UASB pool. The bottom of the UASB pool is provided with a dendritic water distributing pipe. The left end of the dendritic water distributing pipe is connected with a water inlet, and the right end of the dendritic water distributing pipe is connected with a circulation water return pipe. The circulation water return pipe is provided with a temperature sensor and a PH sensor, and the circulation water return pipe is further connected with a circulation water pump. The circulation water return pipe is connected with an upper water return perforated pipe. A steam heaterfor heating the pipe and a liquid caustic soda pipe for transmitting liquid caustic soda are installed between the circulation water return pipe and the upper water return perforated pipe. The steam heater is connected with a steam pipe. The liquid caustic soda pipe is connected with an alkali addition metering pump. A liquid caustic soda storage box for storing the liquid caustic soda is installed beside the alkali addition metering pump. The benefit is that the UASB external circulation temperature and PH regulating system is capable of guaranteeing a suitable reaction temperature and a PH value in the UASB pool, promoting sludge to be stirred, improving the contact mixing effect of sewage and sludge, and improving treatment efficiency.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a UASB external circulation temperature and pH adjustment system. Background technique [0002] In the traditional UASB reactor, high-concentration organic sewage enters from the bottom of the reactor, and there is a high-concentration and high-activity sludge bed at the bottom of the reactor, where most organic pollutants in the sewage are degraded through hydrolysis-acidification-anaerobic fermentation For biogas, mainly methane and carbon dioxide. The biogas is continuously released in the form of micro-bubbles, and the micro-bubbles are continuously merged during the rising process to gradually form larger bubbles. The bubbles stir the sludge at the bottom and promote the contact reaction between sewage and sludge. [0003] During the process of hydrolysis and acidification of sewage at the bottom of UASB, alkalinity needs to be consumed, and the pH of the water will graduall...

AI Technical Summary

Problems solved by technology

With the passage of time, the heat of sewage will gradually lose, and the temperature will gradually drop, especially in the case of low temperature in winter. When the temperature drops too much, it will have a serious impact on the growth and reproduction of anaerobic microorganisms, and it will also affect the treatment effect makes a big difference

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