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Device and method for strengthening resource utilization of excess sludge by sidestream biological nitrogen and phosphorus removal process

A technology for excess sludge and biological denitrification, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve environmental secondary pollution and other problems, and achieve enhanced removal effect , The effect of simplifying the sewage treatment process

Pending Publication Date: 2021-03-19
BEIJING UNIV OF TECH
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Problems solved by technology

With the increase of urban sewage discharge, the output of excess sludge has also increased sharply. Many sewage treatment plants cannot properly treat excess sludge. Because excess sludge contains a large number of toxic and harmful substances such as pathogenic microorganisms and heavy metal ions, Random dumping and landfilling of excess sludge will cause secondary pollution to the environment

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  • Device and method for strengthening resource utilization of excess sludge by sidestream biological nitrogen and phosphorus removal process

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Embodiment Construction

[0018] The patent application is further described in conjunction with accompanying drawings and examples: as figure 1 Shown, the present invention comprises city sewage water tank (1) to be connected with anoxic zone (3) of mainstream reaction zone by influent peristaltic pump (2), and anoxic zone is connected with aerobic zone (4), and air pump (5) The rotameter (6) is connected to the aeration head in the aerobic zone, the aerobic zone is connected to the anoxic zone through the nitrifying liquid return pump (7), and the effluent from the aerobic zone is connected to the secondary settling tank (8). There are drainage holes (9), and part of the sludge in the secondary settling tank is connected to the side flow reaction zone (11) through the first sludge return pump (10), and is connected to the main flow reaction zone through the side flow zone sludge return pump (13). The anoxic zone (3) is connected, and another part of sludge is connected with the anoxic zone of the mai...

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Abstract

The invention discloses a device and a method for strengthening resource utilization of excess sludge by a sidestream biological nitrogen and phosphorus removal process, and belongs to the technical field of biological sewage treatment. One part of returned sludge in a secondary sedimentation tank enters a side flow reaction zone, and activated sludge which has a harmful effect on the environmentdue to the fermentation capacity of phosphorus-accumulating bacteria Tetrasphaera is used as a substrate for fermentation, so that sludge reduction and resource utilization are realized; and the otherpart of the returned sludge and the returned sludge in a side flow fermentation zone enter an anoxic zone of a main flow reaction zone together for denitrification nitrogen and phosphorus removal, and then enter an aerobic zone for aerobic phosphorus absorption and nitrification, so that the biological nitrogen and phosphorus removal process is completed. According to the invention, sludge reduction and resource utilization are realized by utilizing the sludge fermentation effect in the side flow reaction zone, and as volatile fatty acid VFA in inlet water and VFA generated by side flow sludge fermentation directly enter the anoxic zone, the available carbon source in the anoxic zone is increased, the nutrient removal effect is greatly enhanced, and the sewage treatment process is simplified.

Description

technical field [0001] The invention relates to a device and a method for strengthening resource utilization of excess sludge by a side-flow biological denitrification and dephosphorization process, and belongs to the technical field of sewage biological treatment. Background technique [0002] The traditional biological nitrogen and phosphorus removal theory holds that in the mainstream anaerobic zone, phosphorus accumulating bacteria and denitrifying bacteria absorb the volatile fatty acid VFA in the influent and store internal carbon sources, and the phosphorus accumulating bacteria release phosphate into the water, which accumulates in the anoxic zone. The phosphorus bacteria use the internal carbon source stored in the anaerobic section to denitrify and remove phosphorus. The denitrifying bacteria use the carbon source in the sewage and the body to denitrify and denitrify. Turn it into nitrate, the phosphorus accumulating bacteria complete the aerobic phosphorus uptake,...

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Application Information

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IPC IPC(8): C02F3/30C02F101/16C02F101/10
CPCC02F3/30C02F2101/16C02F2101/105
Inventor 曾薇樊志伟贾媛彭永臻
Owner BEIJING UNIV OF TECH
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