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A method for cultivating and treating halophilic granular sludge from high-salt wastewater

A technology for high-salt wastewater and salt granules, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. Sludge, increasing the difficulty of granulation of halophilic sludge, etc., to achieve the effect of various sources of sludge, shortening the treatment cycle and shortening the settling time

Active Publication Date: 2021-10-01
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been many studies on the granulation technology of freshwater activated sludge, the granulation technology of halophilic sludge has not been reported.
This is mainly because the biological and physiological characteristics of halophilic sludge are significantly different from those of freshwater activated sludge, and the freshwater sludge granulation method cannot be directly applied to halophilic sludge.
In addition, to achieve granulation in this special high-salt environment needs to overcome the physical conditions of osmotic pressure environment and high dispersion, which increases the difficulty of halophilic sludge granulation

Method used

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  • A method for cultivating and treating halophilic granular sludge from high-salt wastewater
  • A method for cultivating and treating halophilic granular sludge from high-salt wastewater
  • A method for cultivating and treating halophilic granular sludge from high-salt wastewater

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Effect test

Embodiment 1

[0033] Step 1: Take 400m of sediment from the sea estuary of a certain city and inoculate it into the air-lift activated granular sludge SBR reactor (3) after pre-enrichment culture, and keep the volatile solid concentration at 3000mg / L.

[0034] Step 2: Inject domestic sewage into the raw sewage water tank (1), and add 30g / L coarse salt or sodium chloride to adjust the high-salt domestic wastewater to a salinity of 3%, as the raw influent for granulation cultivation. The COD concentration of the domestic sewage is 200-400mg / L, and the ammonia nitrogen concentration is 45-55mg / L.

[0035]Step 3: In the water inlet stage, the high-salt domestic wastewater configured in the raw water tank (1) is injected into the air-lift activated granular sludge SBR reactor (3) by using the water inlet peristaltic pump (2).

[0036] Step 4: Turn on the aeration pump (3.1) during the aeration stage, and send air to the aeration pan (3.3) through the connecting pipeline. Adjust the gas flow met...

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Abstract

The invention relates to a method for cultivating halophilic granular sludge, which belongs to the field of sewage biological treatment. The principle of the invention is as follows: (1) rapidly increasing the influent load to stimulate EPS secretion of halophilic microorganisms. Microorganisms attach and grow through the binding of EPS, and form mature halophilic active granular sludge under the action of hydraulic shear force; (2) The combined effect of long and short settling time. The long precipitation time in the early stage can achieve the growth of halophilic microorganisms in the reactor; the short precipitation time in the later stage can provide selective pressure for granulation. The halophilic activated granular sludge cultivated in the present invention has various sludge sources and simple technology. Since the enriched microorganisms come from the halophilic bacteria group deposited in the estuary, the salinity tolerance range is between 1% and 10%. And can retain the compact shape structure. It greatly shortens the precipitation time, effectively shortens the treatment cycle and ensures the treatment effect, realizes the rapid treatment of high-salt wastewater, realizes short-range nitrification, and reduces energy consumption by 30%.

Description

technical field [0001] The invention proposes a method for cultivating halophilic granular sludge to realize biological treatment of high-salt wastewater. The invention belongs to the field of sewage biological treatment, especially the field of high-salt wastewater biological treatment. Background technique [0002] Since high-salt wastewater contains a large amount of inorganic salts, freshwater microorganisms cannot survive in a high-salt environment and cannot achieve the function of pollutant degradation. Aiming at how to improve the salt tolerance of microorganisms to realize the biological treatment of high-salt wastewater, researchers have proposed many solutions. Some researchers proposed to improve the salt tolerance of freshwater activated sludge by means of salinity acclimation. For example, patent application number CN200910191713.X proposes a device and method for domesticating ordinary freshwater activated sludge to construct a high-salt wastewater biologica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/34
CPCY02W10/10
Inventor 崔有为黄基霖
Owner BEIJING UNIV OF TECH
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