Method of preparing nano-silicon fungi type magnetic aerobic granular sludge and application

A technology of aerobic granular sludge and nano-silicon, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. Inhomogeneity, long-term use performance of aerobic granular sludge needs to be discussed and other issues, to achieve the effect of avoiding core disintegration, small particle size and high utilization rate

Inactive Publication Date: 2017-05-31
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Abstract
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Problems solved by technology

Among them, nano-iron ferric oxide is a good nucleating carrier, which can not only improve the biological activity of sludge, but also induce the secretion of extracellular polymers, promote sludge coagulation, and facilitate sludge granulation, but unmodified Magnetic Nanoparticles Ferric Oxide Are Prone to Chemical Changes and Agglomeration Effects in Water
Chinese patent CN 106115908A discloses a method for cultivating induced aerobic granular sludge. Diatomaceous earth, nutrient salts, polyferric, and liquid engineering strains are used as additives and added to the activated sludge reactor. Gas, standing, and decanting water circulation treatment to obtain oxygen-containing granular sludge. This method promotes the precipitation of aerobic granular sludge through additives, and shortens the cultivation period of aerobic granular sludge. However, the material form of additives is not uniform, which is easy to cause The size of aerobic granular sludge is uneven and irregular, and the long-term performance of the prepared aerobic granular sludge is also open to question

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  • Method of preparing nano-silicon fungi type magnetic aerobic granular sludge and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve 0.02mol of ferric chloride and 0.01mol of ferric chloride as raw materials in 100ml of distilled water, stir for 1 hour under a nitrogen atmosphere, slowly add 10ml of concentrated ammonia water to adjust the pH value to 8.5-10, and cool to room temperature , after magnetic separation, repeated washing with distilled water to obtain ferric oxide nanospheres.

[0027] (2) Dilute 1g of iron ferric oxide nanospheres in a mixture of 20ml of distilled water, 60ml of absolute ethanol and 1.5ml of concentrated ammonia water, stir evenly, vibrate ultrasonically for 3 hours in a constant temperature water tank, and add 4.5-5ml dropwise Tetraethyl orthosilicate, continue magnetic stirring for 12 hours, use magnet to separate to obtain magnetic particles, wash the magnetic particles with absolute ethanol 3 times, dry and dry to obtain magnetic nanosphere ferric oxide / silicon dioxide.

[0028] (3) In the sequencing batch activated sludge reactor, the volume index SVI o...

Embodiment 2

[0032] (1) Dissolve 0.02mol of ferric chloride and 0.01mol of ferric chloride as raw materials in 100ml of distilled water, stir for 1 hour under a nitrogen atmosphere, slowly add 10ml of concentrated ammonia water to adjust the pH value to 8.5-10, and cool to room temperature , after magnetic separation, repeated washing with distilled water to obtain ferric oxide nanospheres.

[0033] (2) Dilute 1g of iron ferric oxide nanospheres in a mixture of 20ml of distilled water, 60ml of absolute ethanol and 1.5ml of concentrated ammonia water, stir evenly, vibrate ultrasonically for 3 hours in a constant temperature water tank, and add 4.5-5ml dropwise Tetraethyl orthosilicate, continue magnetic stirring for 12 hours, use magnet to separate to obtain magnetic particles, wash the magnetic particles with absolute ethanol 3 times, dry and dry to obtain magnetic nanosphere ferric oxide / silicon dioxide.

[0034] (3) In the sequencing batch activated sludge reactor, the volume index SVI of ...

Embodiment 3

[0038] (1) Dissolve 0.02mol of ferric chloride and 0.01mol of ferric chloride as raw materials in 100ml of distilled water, stir for 1 hour under a nitrogen atmosphere, slowly add 10ml of concentrated ammonia water to adjust the pH value to 8.5-10, and cool to room temperature , after magnetic separation, repeated washing with distilled water to obtain ferric oxide nanospheres.

[0039] (2) Dilute 1g of iron ferric oxide nanospheres in a mixture of 20ml of distilled water, 60ml of absolute ethanol and 1.5ml of concentrated ammonia water, stir evenly, vibrate ultrasonically for 3 hours in a constant temperature water tank, and add 4.5-5ml dropwise Tetraethyl orthosilicate, continue magnetic stirring for 12 hours, use magnet to separate to obtain magnetic particles, wash the magnetic particles with absolute ethanol 3 times, dry and dry to obtain magnetic nanosphere ferric oxide / silicon dioxide.

[0040] (3) In the sequencing batch activated sludge reactor, the volume index SVI o...

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Abstract

The invention provides a method of preparing nano-silicon fungi type magnetic aerobic granular sludge and an application. The preparation method comprises the steps that ferroferric oxide nano balls are diluted in distilled water, ultrasound is conducted on the mixed liquid of absolute ethyl alcohol and thick ammonia, tetraethoxysilane and magnetic ferroferric oxide nano ball / silicon dioxide are dripped in; in a sequence batch type active sludge reactor, magnetic ferroferric oxide nano ball / silicon dioxide and fungi are added into an active sludge system, to prepare and form modified aerobic granular sludge; the modified aerobic granular sludge is immersed in modified solution of ferric chloride, and oscillated under constant temperature and repeatedly washed with deionized water, and the nano-silicon fungi type magnetic aerobic granular sludge is obtained, then sedimented. The usage of granular sludge comprises the steps that after the waste water is filtered by a grille, the pH value is adjusted to neutral, then added with nano-silicon fungi type magnetic aerobic granular sludge, and precipitated. The prepared nano-silicon fungi type magnetic aerobic granules are high in the forming efficiency, the wastewater nitrogen and phosphorus removal capability is good.

Description

technical field [0001] The invention belongs to the technical field of aerobic granular sludge materials, and in particular relates to a preparation method and application of nano silicon fungus type magnetic aerobic granular sludge. Background technique [0002] Sludge granulation refers to the aggregation of microorganisms in the wastewater biological treatment system under appropriate environmental conditions to form a microbial aggregate with higher density, larger volume and better constitution. Granular sludge has good settling properties, compact structure, high concentration of biomass, strong impact load and the ability to resist toxic and harmful substances. Granular sludge is divided into aerobic granular sludge and anaerobic granular sludge according to the different electron acceptors in the microbial metabolism process. Among them, aerobic granular sludge was discovered by Mishima et al. in 1991, and aerobic granular sludge is Aggregate particles derived from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/34C02F9/14
CPCC02F1/001C02F1/66C02F3/1205C02F3/1263C02F3/347C02F9/00C02F2101/105C02F2101/16C02F2101/20C02F2301/08Y02W10/10
Inventor 李风浪
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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