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Method for utilizing activated sludge, ozone and magnetic field to reduce sludge

A sludge reduction and activated sludge technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve problems such as deterioration of effluent water quality, increase of effluent COD, nitrogen, and phosphorus , to achieve the effect of improving effluent water quality, VSS/SS, and improving the reduction effect

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

(Yasui H, Shibata M. An innovative approach to reduce excess sludge production in the activated sludge process[J]. Water Science and Technology. 1994, 30(9): 11-20.) But in the ozone-activated sludge process , nitrogen and phosphorus are dissolved in the sludge supernatant due to ozone oxidation and accumulate in the system, resulting in an increase in effluent COD, nitrogen and phosphorus (Kamiya T, Hirotsuji J. New combined system of biological process and intermittent ozonation for advanced wastewater treatment. Water Science and Technology. 1998, 38(8-9): 145-153.)
[0004] In order to solve the problem of poor water quality in the ozone-activated sludge process, our laboratory has developed a new process of activated sludge-ozone-magnetic field

Method used

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  • Method for utilizing activated sludge, ozone and magnetic field to reduce sludge
  • Method for utilizing activated sludge, ozone and magnetic field to reduce sludge

Examples

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Embodiment 1

[0023] Example 1: What this embodiment adopts is the activated sludge process and its improved process. The volume ratio of each reactor is aeration tank:secondary sedimentation tank:magnetization tank=20:8:1. The concentration of sludge in the aeration tank is 1-3g / l, the temperature in the aeration tank is kept at 20-40 degrees, the pH is kept at 6.8-7.5, and trace elements calcium, iron, magnesium, and cobalt are added to the aeration tank , Nickel, the addition amount is 0.08 mg / l, 0.08 mg / l, 0.08 mg / l, 0.04 mg / l, 0.04mg / l respectively, so that the concentration of trace elements iron, manganese, calcium, magnesium and sodium are kept at A certain concentration, the magnetic field strength of the magnetization pool is 50GS. There are 3 sets of experimental devices (marked as a, b, c). The three sets of devices are all connected to the activated sludge of the secondary settling tank of a sewage treatment plant, and the untreated sewage (COD is 250mg / l) is fed into the ...

Embodiment 2

[0026] Example 2:What this embodiment adopts is the activated sludge process and its improved process. The volume ratio of each reactor is aeration tank:secondary sedimentation tank:magnetization tank=20:8:1. The concentration of sludge in the aeration tank is 1-3g / l, the temperature in the aeration tank is kept at 20-40 degrees, the pH is kept at 6.8-7.5, and trace elements calcium, iron, magnesium, and cobalt are added to the aeration tank , Nickel, the addition amount is 0.08 mg / l, 0.08 mg / l, 0.08 mg / l, 0.04 mg / l, 0.04mg / l respectively, so that the concentration of trace elements iron, manganese, calcium, magnesium and sodium are kept at With a certain concentration, the magnetic field strength of the magnetization pool is 200GS. There are 3 sets of experimental devices (marked as a, b, c). The three sets of devices are all connected to the activated sludge of the secondary settling tank of a sewage treatment plant, and the untreated sewage (COD is 250mg / l) is fed into ...

Embodiment 3

[0029] Example 3: What this embodiment adopts is the activated sludge process and its improved process. The volume ratio of each reactor is aeration tank:secondary sedimentation tank:magnetization tank=20:8:1. The concentration of sludge in the aeration tank is 1-3g / l, the temperature in the aeration tank is kept at 20-40 degrees, the pH is kept at 6.8-7.5, and trace elements calcium, iron, magnesium, and cobalt are added to the aeration tank , Nickel, the addition amount is 0.08 mg / l, 0.08 mg / l, 0.08 mg / l, 0.04 mg / l, 0.04mg / l respectively, so that the concentration of trace elements iron, manganese, calcium, magnesium and sodium are kept at A certain concentration, the magnetic field strength of the magnetization pool is 500GS. There are 3 sets of experimental devices (marked as a, b, c). The three sets of devices are all connected to the activated sludge of the secondary settling tank of a sewage treatment plant, and the untreated sewage (COD is 250mg / l) is fed into the ...

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Abstract

The invention relates to a method for utilizing activated sludge, ozone and a magnetic field to reduce sludge, which belongs to the field of sewage treatment and is characterized by including adding parts of sludge taken from a secondary sedimentation tank into an ozone reactor for ozone breaking, adding broken sludge into a magnetization tank, reinforcing enzymatic activity of microorganism in the magnetization tank through effects of the magnetic field to the microorganism, promoting continuous decomposition of refractory fragments and dead microorganism thallus after ozone breaking, and simultaneously enabling high-activity enzyme produced in the magnetization tank to enter an aeration tank with sludge to stimulate regeneration and activation of microorganism in the aeration tank and remove the dead microorganism thallus. The cast quantity of ozone is 0.01-0.05gO3 / gSS, the strength of the magnetic field in the magnetization tank is 50-600 GS, the aeration mode is that an aeration head is utilized for aeration, the dissolved oxygen density is 2ppm. And the reduction amount of the sludge can reach over 90%.

Description

technical field [0001] The invention relates to a method for reducing the amount of sludge by using activated sludge, ozone and a magnetic field in the field of sewage treatment. Background technique [0002] Sludge is the main product of the activated sludge process, and its output accounts for 0.5-1% of the influent. Under normal circumstances, the treatment cost of sludge accounts for about 65% of the whole sewage treatment cost. The essence of sewage biochemical treatment is to use the colloidal and dissolved organic matter in sewage as a source of nutrition for microorganisms, and convert them into carbon dioxide, water and biological matter, and the excess biological matter constitutes the remaining sludge produced by biochemical treatment. The sludge contains organic matter, heavy metals, inorganic salts, microbial eggs and other substances. If the sludge is not treated, it will cause serious secondary pollution. Sewage treatment plants usually use incineration and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F11/00
CPCY02W10/10
Inventor 王哲明沈树宝黄勇陈英文罗翔章继龙惠祖刚刘臻臻郭玉旗王桂林韩晓磊
Owner CHINA PETROLEUM & CHEM CORP
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