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A high-efficiency biological treatment system and process for organic nitrogen industrial wastewater

A technology for industrial wastewater and biological treatment, applied in biological water/sewage treatment, electrochemical biological combination treatment, water/sludge/sewage treatment, etc. Removal of low efficiency and other problems, to achieve the effect of improving microbial denitrification ability, biodegradability, and stable operation

Active Publication Date: 2021-04-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of unstable process operation effect, poor organic nitrogen degradation effect, low inorganic nitrogen removal efficiency and poor economy in the existing organic nitrogen industrial wastewater treatment process, and then provide an organic nitrogen Nitrogen Industrial Wastewater Efficient Biological Treatment System and Its Technology

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  • A high-efficiency biological treatment system and process for organic nitrogen industrial wastewater
  • A high-efficiency biological treatment system and process for organic nitrogen industrial wastewater
  • A high-efficiency biological treatment system and process for organic nitrogen industrial wastewater

Examples

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Embodiment 1

[0035] This embodiment adopts a set of small-scale test equipment with a processing capacity of 10L / d. The organic nitrogen industrial wastewater treated is taken from the effluent of a textile printing and dyeing factory. The average value is 150mg / L, and the average value of COD concentration is 2300mg / L. The wastewater treatment process is as follows figure 1 As shown, it includes a compound hydrolytic acidification tank 1, an upflow anaerobic sludge bed filter 2, a low-voltage electric enhanced biological reaction tank 3 and a secondary sedimentation tank 4 connected in series.

[0036] Such as figure 2 As shown, the bottom of the composite hydrolytic acidification tank 1 is provided with a multi-point water distribution system-11, a submersible pump 12 and a mud discharge device-13, wherein the multi-point water distribution system-11 includes a The bottom has a water distribution pipe 110 with multiple water distribution holes 14, the distance between the water inlet ...

Embodiment 2

[0043] This embodiment adopts the same test scope as that of Example 1, that is, adopts a set of small test equipment, the same processing system, and a processing capacity of 4 L / d. The difference with Example 1 is that the processed organic nitrogen industrial wastewater is taken from the production wastewater of a certain pharmaceutical factory. The water quality characteristics include that the average value of total nitrogen concentration is 83mg / L, the average concentration of organic nitrogen is 432mg / L, and the average value of COD concentration is 10300mg / L, the system process flow chart is as follows figure 1 As shown, the process of wastewater treatment by this system includes the following steps:

[0044] Step 1: The organic nitrogen industrial wastewater is treated by the grid; it is controlled by the multi-point water distribution system 11 to enter the compound hydrolysis acidification tank 1, and the pH in the control tank is 8.0, the hydraulic retention time i...

Embodiment 3

[0048] This embodiment adopts the same test range as that of Example 1, that is, adopts a set of small-scale test equipment, the same processing system, and a processing capacity of 5 L / d. The difference from Example 1 is that the processed organic nitrogen industrial wastewater is organic amine wastewater, and the water quality characteristics include an average total nitrogen concentration of 1300 mg / L, an average organic nitrogen concentration of 520 mg / L, and an average COD concentration is 17000mg / L, the system process flow chart is as follows figure 1 As shown, the process of wastewater treatment by this system includes the following steps:

[0049] Step 1: The organic nitrogen industrial wastewater is treated by the grid; it is controlled by the multi-point water distribution system 11 to enter the compound hydrolysis acidification tank 1, and the pH in the control tank is 8.0, the hydraulic retention time is 10h, and the sludge concentration is 5.2g / L-6.0g / L, the slu...

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Abstract

The invention discloses a high-efficiency biological treatment system and process for organic nitrogen industrial wastewater, which belongs to the technical field of sewage treatment. Biological reaction tank and secondary sedimentation tank. The bottom of the compound hydrolysis acidification tank is equipped with multi-point water distributor, submersible pump and sludge discharge device, the middle part is equipped with suspended soft packing, and the top is equipped with water collection tank and diversion pipe; upflow anaerobic sludge bed filter The bottom is equipped with a multi-point water distribution system and mud discharge device, the top is equipped with a gas collection device and an overflow weir, and the upper part of the pool is equipped with a perforated partition and a combined packing. The low-voltage electric enhanced biological reaction pool includes A1 section, O1 section, A2 section, and O2 section. The A2 section and O2 section are equipped with low-voltage electric strengthening devices. The system and process of the invention have the advantages of stable operation and high denitrification rate, and have practical significance for solving the problem of effluent water quality of organic nitrogen industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a high-efficiency biological treatment system for organic nitrogen industrial wastewater and a process thereof. Background technique [0002] Organic nitrogen industrial wastewater originates from tanning, dyestuff, rubber, petroleum and other industries. It has complex composition, various pollutants, difficult to degrade, toxic, high concentration of organic pollutants, high nitrogen-carbon ratio, poor biodegradability, deep color, The difference in water quality is large and the discharge volume is large, which is a kind of industrial wastewater that is difficult to treat. Nitrogen in organic nitrogen industrial wastewater mainly exists in the form of organic nitrogen. The degradation of high specific gravity organic nitrogen pollutants in organic nitrogen industrial wastewater and the subsequent removal of inorganic nitrogen are the most difficult points ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/16C02F101/38
CPCC02F3/005C02F3/302C02F2101/16C02F2101/38
Inventor 胡海冬廖可薇任洪强朱燕
Owner NANJING UNIV
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