CN-224226811-U - UASB reactor based on denitrification of sulfur circulation biological system

CN224226811UCN 224226811 UCN224226811 UCN 224226811UCN-224226811-U

Abstract

The utility model relates to a UASB reactor based on denitrification of a sulfur circulation biological system, which comprises a reactor column, a bottom cover detachably connected to the bottom of the reactor column and a three-phase separator detachably connected to the top of the reactor column, wherein the reactor column is of a double-layer cavity structure, an inner cavity is used as a reaction zone, an outer cavity is used as a constant-temperature water bath zone, the constant-temperature water bath zone and the reaction zone are independently separated, a water inlet is arranged on the bottom cover, an air outlet, a water outlet and a sampling port are arranged on the three-phase separator, a sedimentation zone consisting of a sludge layer, a suspension layer and the three-phase separator is sequentially arranged in the reactor from bottom to top, a defoaming device is arranged in the reactor, and comprises a scum baffle arranged at the water outlet and used for intercepting granular sludge with bubbles, so that pollutants such as COD, nitrate or nitrate nitrogen in waste water can be effectively removed, the requirement of centralized treatment of the nitrogen-containing waste water is met, and the anaerobic biological treatment efficiency of the nitrogen-containing waste water is effectively improved.

Inventors

WEI HUIBIN
XU YING
WEN SHULONG
SUN YIHU
Zhou Shangteng

Assignees

湖南迪亚环境工程股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250508

Claims (10)

1. A UASB reactor based on denitrification of a sulfur circulation biological system is characterized by comprising a reactor column, a bottom cover detachably connected to the bottom of the reactor column and a three-phase separator detachably connected to the top of the reactor column; The reactor column body is of a double-layer cavity structure, the inner cavity is used as a reaction zone, the outer cavity is used as a constant-temperature water bath zone, and the constant-temperature water bath zone and the reaction zone are independently separated; A water inlet is formed in the bottom cover; the three-phase separator is provided with an exhaust port, a water outlet and a sampling port; the inside of the reactor is provided with a sludge layer, a suspension layer and a sedimentation zone formed by the three-phase separator from bottom to top in sequence, the reactor is internally provided with a defoaming device, and the defoaming device comprises a scum baffle arranged at the water outlet and is used for intercepting granular sludge with bubbles.
2. A UASB reactor according to claim 1, wherein a movable plate is provided inside the reactor column, the movable plate being secured to the reactor column by a stop collar block, the sealing of the reactor column being effected in the secured state of the movable plate.
3. The UASB reactor of claim 1, wherein the thermostatic waterbath zone is connected to an external thermostatic waterbath tank by a hot water circulation pump to form a closed loop temperature control system.
4. A UASB reactor according to claim 1, wherein the sludge layer is provided with a complex population of sulfate-reducing bacteria and sulfur autotrophic denitrifying bacteria.
5. A UASB reactor according to claim 1, wherein the water inlet of the reactor is connected to the raw water tank by a peristaltic pump and a gate valve is provided in the water inlet line to regulate the flow.
6. A UASB reactor according to claim 1, wherein the bottom of the reactor column is provided with a sludge circulation pump connection port for returning sludge to the suspension layer.
7. A UASB reactor according to claim 1, wherein the dross baffle is a removable mesh structure having a pore size of less than 0.5mm for intercepting sludge and allowing liquid to pass through.
8. A UASB reactor according to claim 1, wherein the reactor column is a component made of acrylic material.
9. A UASB reactor according to claim 1, wherein the reactor column and the bottom cap and the reactor column and the three-phase separator are connected by a flange structure.
10. A UASB reactor according to claim 1, wherein the surface of the three-phase separator is covered with a hydrophobic coating to enhance gas-liquid separation efficiency.

Description

UASB reactor based on denitrification of sulfur circulation biological system Technical Field The utility model relates to the technical field of anaerobic biological treatment of wastewater, in particular to a UASB reactor based on denitrification of a sulfur circulation biological system. Background The wastewater denitrification treatment process is various, high-concentration nitrate can be contained in wastewater in many industries, the nitrate can cause eutrophication of the water body after entering the water body, adverse effects are caused on production and life of aquatic organisms and human beings, currently, the common sewage denitrification process mainly comprises a physical and chemical method, a biological method and the like, wherein the physical and chemical method mainly comprises an ion exchange method, electrodialysis, reverse osmosis and the like, but the cost is too high, the wastewater denitrification process is rarely used, heterotrophic denitrification in the biological method can obtain good denitrification effect although the heterotrophic denitrification process is widely applied, but a large amount of carbon sources are generally required to be additionally added, the operation cost and the process complexity are increased, and in addition, higher sludge yield and greenhouse gas emission are caused. At present, the industry uses a sulfur circulation biological system denitrification technology to denitrify, and compared with other denitrification technologies, the sulfur circulation biological system denitrification technology has the advantages that the reduced sulfide serving as an electron donor is cheap and easy to obtain, is little influenced by water quality and is easy to use. An Upflow Anaerobic Sludge Blanket (UASB) is a common sewage anaerobic biological treatment device widely applied to the biological treatment process of organic wastewater, however, the wastewater has complex components and total nitrogen exceeding standard, and a great amount of organic carbon is consumed and the reaction condition is controlled in the process of removing nitrate nitrogen. Therefore, the application provides a UASB reactor based on denitrification of a sulfur circulation biological system, in the process of treating nitrogen-containing wastewater by using the UASB reactor, the denitrification technology of the sulfur circulation biological system can reduce the use of carbon sources under the condition of low carbon nitrogen ratio so as to reduce the operation cost, the denitrification technology of the sulfur circulation biological system takes sulfate as a main sulfur source, sulfate reducing bacteria are introduced to reduce the sulfate into sulfide for autotrophic bacteria, and the UASB reactor integrates biological reaction and precipitation separation, so that the structure is simple, and the operation is convenient. Disclosure of utility model In view of the defects of the traditional wastewater denitrification method, the UASB reactor based on denitrification of the sulfur circulation biological system is provided, can effectively remove pollutants such as COD, nitrate or nitrate nitrogen in wastewater, meets the requirement of concentrated treatment of the nitrogen-containing wastewater, and effectively improves the anaerobic biological treatment efficiency of the nitrogen-containing wastewater. In order to achieve the above purpose, the utility model adopts the following technical scheme: A UASB reactor based on denitrification of a sulfur circulation biological system comprises a reactor column, a bottom cover detachably connected to the bottom of the reactor column and a three-phase separator detachably connected to the top of the reactor column; The reactor column body is of a double-layer cavity structure, the inner cavity is used as a reaction zone, the outer cavity is used as a constant-temperature water bath zone, and the constant-temperature water bath zone and the reaction zone are independently separated; A water inlet is formed in the bottom cover; the three-phase separator is provided with an exhaust port, a water outlet and a sampling port; the inside of the reactor is provided with a sludge layer, a suspension layer and a sedimentation zone formed by the three-phase separator from bottom to top in sequence, the reactor is internally provided with a defoaming device, and the defoaming device comprises a scum baffle arranged at the water outlet and is used for intercepting granular sludge with bubbles. Optionally, a movable plate is arranged inside the reactor cylinder, the movable plate is fixed on the reactor cylinder through a limiting ring block, and sealing of the reactor cylinder is achieved under the fixed state of the movable plate. Alternatively, the constant-temperature water bath area is connected with an external constant-temperature water bath box through a hot water circulating pump to form a closed-loop temperature control system. Alternatively