Hydrolysis reactor for strengthening sludge utilization and process thereof

Abstract

The invention provides a hydrolysis reactor for strengthening sludge utilization and a process thereof. The hydrolysis reactor comprises a reactor barrel, wherein an upper layer water distribution device and a lower layer water distribution device are arranged in the reactor barrel so as to form a sludge hydrolysis region and a solid-liquid separation region. According to the invention, the two layers of water distribution devices are used for increasing the residence time of the sludge and strengthening the hydrolysis of the retained sludge, micromolecule organics released by the synchronous hydrolysis of sewage and sludge can be used as high quality carbon source for the subsequent nitrogen and phosphorus removal process, thus the problem of lacking the carbon source in the municipal sewage nitrogen and phosphorus removal process can be alleviated, and the reduction of the sludge can be realized. Besides, two-layer water distribution can not only timely migrate the carbon source released by the sludge hydrolysis region to the upper layer, but also effectively reduce the ascending flow rate of the sludge hydrolysis region, thus the problem of poor removal effect of suspended particulate matters caused by the fact that granule sludge hydrolyzed in the sludge hydrolysis region can be taken away by water outlet can be avoided.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a hydrolysis reactor for enhancing sludge utilization and a process thereof. Background technique [0002] With the increasingly serious water pollution, sewage treatment technology has received more and more attention in our country. Compared with developed countries, my country's urban sewage has an influent carbon-to-nitrogen ratio (BOD 5 / TN) is significantly low, which leads to the lack of sufficient carbon source in the subsequent denitrification process of sewage. According to statistics, my country's urban sewage influent BOD 5 The proportion of sewage treatment plants with a / TN ratio of less than 3.0 is as high as 40%. The removal rate of total nitrogen in these sewage treatment plants is low, usually between 50-80%, and it is difficult for the total nitrogen in the effluent to reach the standard stably. In order to solve this problem, those skilled in the...

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Problems solved by technology

[0004] However, the process in the above-mentioned prior art is as follows: after the sewage enters from the water inlet pipe, it passes through the suspended sludge area, the mud-water separation area and the biofilm strengthening area successively from bottom to top, and then enters the water collection device, and then flows out through the water outlet pipe.

In order to meet the needs of sewage treatment, the water inflow of the hydrolysis acidification process is usually relatively large, which makes the water flow have a higher rising velocity, and the higher rising velocity will cause the small particle sludge in the sludge hydrolysis zone to be discharged with the effluent , resulting in difficult separation of mud and water, which reduces the removal efficiency of suspended particulate matter by the hydrolytic acidification device, and also leads to a short residence time of small particle sludge in the sludge hydrolysis zone, which affects the hydrolysis effect of sludge

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