Accelerant for quick recovery of nitrifying bacteria after suppression by heavy metals

A rapid recovery, heavy metal technology, used in chemical instruments and methods, sustainable biological treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of less carbon source content, conducive to rapid recovery, and no infrastructure costs

Inactive Publication Date: 2015-12-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no technical method to quickly restore the nitrification activity of a large amount of activated sludge in the biological reaction tank. It can only be restored naturally by microorganisms, which takes a very long time and brings great challenges to the stable operation of ammonia nitrogen and total nitrogen in sewage plants.
[0003] Chinese patent CN102198980A discloses a preparation method of a bioaccelerator, which aims to improve the activity of indigenous beneficial microorganisms in sewage, but the bioaccelerator is aimed at microorganisms that are not inhibited by heavy metals, and the patent is rich in carbon sources. It is conducive to the enrichment and growth of nitrifying bacteria, which is not conducive to the efficient removal of nitrogen

Method used

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  • Accelerant for quick recovery of nitrifying bacteria after suppression by heavy metals
  • Accelerant for quick recovery of nitrifying bacteria after suppression by heavy metals
  • Accelerant for quick recovery of nitrifying bacteria after suppression by heavy metals

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Experimental program
Comparison scheme
Effect test

Embodiment 4

[0017] Embodiment 4 A kind of nitrifying bacteria is subjected to the preparation of fast recovery promoter aqueous solution after being suppressed by heavy metals:

[0018] Weigh each component raw material (in milligrams) according to the formula of each example in Table 1, add pure water to 10 L, heat to 40°C, stir until the solution is completely dissolved, let stand at room temperature for 2 hours, and store in a sealed container.

Embodiment 5

[0020] Effect experiment:

[0021] (1) Heavy metal Cu 2+ Recovery experiment after inhibiting nitrifying bacteria

[0022] Four groups of SBR reactors were operated in parallel, and the operation period was 2 hours, in which water was fed for 2 minutes, aeration was 80 minutes, static settling was 35 minutes, and water outlet was 3 minutes. The amount of water treated in each operation cycle is 0.80L. Using artificial self-distribution water, water NH 4 + -N concentration is 80.00mg / L, COD concentration is 120.00mg / L. The inoculum sludge was taken from a sewage treatment plant A in Tianjin 2 O aeration tank. In the experiment, the temperature was 25±0.1°C, DO≥2mg / L in the reactor was controlled during aeration, and the sludge was discharged regularly to ensure that the MLSS was about 2000mg / L.

[0023] Water NH in each reactor 4 + - When the N concentration is maintained below 0.10mg / L, add Cu 2+ Make influent Cu 2+ Concentration is 50.00mg / L, when Cu 2+ When the i...

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Abstract

The invention discloses an accelerant for quick recovery of nitrifying bacteria after suppression by heavy metals. The accelerant comprises components by weight as follows: 1-7 parts of vitamin H, 0-8 parts of lysine, 2-17 parts of aspartic acid, 0-6 parts of tryptophane, 0.5-3 parts of 6-benzyladenine, 0-2 parts of zeatin, 2-20 parts of iron, 4-16 parts of zinc, 4-12 parts of magnesium, 0-10 parts of copper, 4-8 parts of manganese and 2-6 parts of cobalt, wherein the content of the lysine, the content of the tryptophane, the content of the zeatin and the content of the copper are not zero simultaneously. According to the accelerant, raw materials are easy to obtain, the price is low, and the accelerant is non-toxic and environment-friendly, has extremely low content of a carbon source and is beneficial to quick recovery of nitrifying bacteria after suppression; the accelerant is simple to prepare and use and free of capital expenditure and power consumption; the accelerant can be applied to the condition that the nitrifying bacteria of domestic and industrial sewage treatment plants are suppressed and can be widely applied.

Description

technical field [0001] The invention belongs to the field of biotechnology, and more specifically relates to a rapid recovery accelerator after nitrifying bacteria are inhibited. Background technique [0002] The biological denitrification process of wastewater is to remove nitrogen through ammonification, nitrification and denitrification reactions. Due to the low growth rate of nitrifying bacteria and their high sensitivity to pH, dissolved oxygen concentration, temperature, toxic chemicals, etc., nitrification has been regarded as the rate-limiting step in the denitrification process. In recent years, with the rapid development of industry, electroplating, metallurgy, chemical industry and other industries have produced a large amount of wastewater containing heavy metal ions. Some urban sewage treatment plants will receive industrial wastewater at the same time. When the concentration of heavy metal ions in the influent suddenly increases to form an impact load, the nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/12
CPCY02W10/10
Inventor 季民赵迎新王越
Owner TIANJIN UNIV
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