Biological nitrogen removal reactor for sewage and using method thereof

A technology of sewage biology and reactor, which is applied in the direction of chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problems of long start-up period, difficult control of reaction conditions, low denitrification efficiency, etc., and achieve convenient and flexible Adjustment, good operation effect, and effect of reducing sludge loss

Active Publication Date: 2017-12-19
DALIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment cost, floor space and energy consumption of the two-stage process are relatively high.
In addition, some scholars have developed a single-stage process that combines semi-nitrification and anammox, but there are common problems such as low nitrogen removal efficiency, long start-up period, and difficult control of reaction conditions.

Method used

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  • Biological nitrogen removal reactor for sewage and using method thereof
  • Biological nitrogen removal reactor for sewage and using method thereof
  • Biological nitrogen removal reactor for sewage and using method thereof

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Effect test

Embodiment 2

[0051] Embodiment 2 Reactor operation effect

[0052] Reactor of the present invention moves about 120 days altogether, and the working process of each stage of operation is described below:

[0053] In the first stage (0-50 days), the concentration of ammonia nitrogen in the influent is 50-100mg / L, and the concentration of nitrite nitrogen is 30mg / L. After about 15 days of adaptation period, the ammonia nitrogen (NH 4 + -N), nitrous nitrogen (NO 2 - -N) concentrations were all less than 2mg / L, indicating that AOB bacteria and ANAMMOX bacteria had basically adapted to the environment in the reactor.

[0054] From day 16 onwards, water NH 4 + -N concentration increased to 100mg / L, NO 2 - -N concentration increased to 50mg / L, when the reactor runs to 30 days, the water NH 4 + -N concentration decreased to 8mg / L, indicating that the activities of AOB bacteria and ANAMMOX bacteria in the reactor were basically restored. Within 30 days to 40 days of reactor operation, the...

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Abstract

The invention relates to the technical field of sewage treatment, and particularly relates to a biological nitrogen removal reactor for sewage and a using method thereof. The invention adopts the main technical scheme that the biological nitrogen removal reactor for the sewage has an integrated communication structure which consists of a fluidized bed and a trickle bed; support legs are arranged at the bottom of the reactor; electric heating belts are circularly arranged outside the reactor; the inner part of the fluidized bed is filled with an oxygen-limiting carrier; a gas-liquid separator is arranged above the oxygen-limiting carrier; the bottom part of the fluidized bed is provided with an air inlet; a gas distributor is arranged at the air inlet; a sewage inlet is formed in one side of the fluidized bed. According to the biological nitrogen removal reactor disclosed by the invention, different requirements on oxygen concentration required by two reaction are met while the advantages that the mass-transfer efficiency of the fluidized bed is high and biomass is repeatedly applied to the trickle bed are fully utilized, the loss of a biological bacterium body is also reduced, and input of equipment energy is reduced.

Description

technical field [0001] The invention relates to a biological nitrogen removal reactor for sewage and a method for using the same, belonging to the technical field of sewage treatment. Background technique [0002] The fluidized bed reactor keeps the solid particles in the liquid suspended in the liquid through the fluidized state of the liquid to achieve the purpose of enhancing mass transfer. The energy to achieve fluidization is usually provided by high-speed flowing liquid or gas. Due to the advantages of good mass transfer effect and simple structure, fluidized bed has been widely used in wastewater treatment process. Its main design parameters are bed expansion ratio, suitable fluid velocity, density difference between vapor and solid, etc. Because most of the fluidization energy of the fluidized bed is provided by gas, its application in aerobic process is more common, but its application in anaerobic process is limited. [0003] A trickle bed is a type of fixed bed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F3/28C02F101/16
CPCC02F3/28C02F3/2833C02F3/307C02F3/34C02F2101/16
Inventor 韩越梅
Owner DALIAN UNIV
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