Method for achieving fast cultivation of shortcut nitrifying granule sludge

A granular sludge and short-range nitrification technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problem of long start-up time, high operating temperature, and Insufficient stability and efficiency and other problems, to achieve the effect of accelerating the granulation speed, improving the settlement performance, and improving the compactness

Active Publication Date: 2013-06-12
BEIJING UNIV OF TECH
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Problems solved by technology

However, the start-up time of anaerobic granular sludge technology is relatively long.
[0005] The high operating temperature, unstable treatment of low-load sewage, and low efficiency in nitrogen and phosphorus removal have promoted people's research on aerobic granular sludge technology, and achieved a series of research results. Development of Biological Denitrification Technology of Aerobic Granular Sludge

Method used

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  • Method for achieving fast cultivation of shortcut nitrifying granule sludge
  • Method for achieving fast cultivation of shortcut nitrifying granule sludge
  • Method for achieving fast cultivation of shortcut nitrifying granule sludge

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Embodiment 1

[0023] SBR reactor is adopted, with a height of 50cm, a diameter of 23.5cm, and an effective volume of 21L. It is made of plexiglass. A row of sampling ports with a spacing of 10cm is set on the vertical direction of the reactor wall, and a sludge discharge pipe is provided at the bottom. The drainage ratio 60%. The rubber microporous aeration disc is used as the aerator, and the air blowing is used for aeration, and the rotameter controls the aeration volume to keep it constant at 1L / h. The temperature in the reactor is controlled by a temperature controller and kept at 25-28°C. The operation of the SBR reactor realizes the automatic control of the reaction process through the time program controller, and runs 3 cycles a day, each cycle is 8h. The influent is artificially simulated domestic sewage, with sodium acetate as the organic carbon source, and the corresponding COD concentration is 400mg / L, NH 4 + -N concentration is 80mg / L. The MLSS of the inoculated sludge was 4...

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Abstract

The invention belongs to the fields of treatment and regeneration of municipal sewage, and particularly relates to a method for rapidly cultivating aerobic granular sludge with good shortcut nitrifying performance. A sequencing batch reactor (SBR) is operated by fixed aeration time and aeration rate by gradually shortening the settling time; and the shortcut nitrifying granule sludge is rapidly cultivated. The granulation of common floc sludge is successfully achieved within 20 days via three stages of overdue cultivation, granule forming and granule maturation; the nitrite accumulation rate (NAR) achieves 80% within 80 days; the mean grain size is greater than 800 microns; the removal rate of the NH4<+>-N is close to 100%; and the removal rate of the chemical oxygen demand (COD) is 94%.

Description

technical field [0001] The invention belongs to the field of urban domestic sewage treatment and regeneration, and in particular relates to a rapid cultivation method of aerobic granular sludge with short-range nitrification performance. Background technique [0002] With the rapid development of science and technology, environmental problems represented by water pollution have become increasingly prominent, and the removal of ammonia nitrogen in wastewater has attracted the attention of many scholars. With the development of sewage treatment technology, many treatment methods have appeared today, among which biological denitrification technology has become a research hotspot in this field. [0003] Compared with the whole process of denitrification, the short-range denitrification can save 25% of the aeration volume in the nitrification stage, and can reduce the organic carbon source by 40% in the denitrification stage, and the short-range nitrification-denitrification biol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/34
CPCY02W10/10
Inventor 李军刘国洋王昌稳孟维举卞伟郑照明郑林雪刘彬
Owner BEIJING UNIV OF TECH
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