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Porous biological filler for purifying polluted seawater as well as preparation method and application of porous biological filler

A biological filler and seawater purification technology, applied in the direction of water pollutants, chemical instruments and methods, applications, etc., can solve the problems of microbial growth and aggregation that are difficult to degrade, marine pollution, single filler components, etc., to improve the slow growth of microorganisms in water treatment and aggregation difficulties, increase the contact area with water body, and strengthen the effect of heterotrophic denitrification process

Inactive Publication Date: 2022-08-02
DALIAN OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Marine-related industries such as marine aquaculture produce a large amount of polluted seawater containing various organic substances and nitrogen compounds; marine pollution; due to the adverse effects of seawater salinity and other factors, water treatment microorganisms cannot produce a high removal rate of pollutants as in freshwater environments, and a considerable part of pollutants are discharged into seawater without sufficient removal, resulting in pollution of the marine environment
[0003] The reason why the degradation of pollutants in seawater is more difficult than in fresh water is that conditions such as high salinity in seawater are not conducive to the growth and aggregation of microorganisms. The use of biological fillers can increase the biomass in sewage treatment systems, but the single composition of fillers and unconnected pores cause specific surface area Problems such as small size, less available carbon source, and unfavorable biological oxidation and reduction will cause problems such as low biomass and accumulation of microorganisms in contaminated seawater biological treatment devices, and unsatisfactory treatment effects. The biological fillers and effects applied to seawater treatment are still Need to further develop and improve

Method used

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  • Porous biological filler for purifying polluted seawater as well as preparation method and application of porous biological filler
  • Porous biological filler for purifying polluted seawater as well as preparation method and application of porous biological filler
  • Porous biological filler for purifying polluted seawater as well as preparation method and application of porous biological filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a porous biological filler for purification of polluted seawater, comprising the following steps:

[0041] Step 1: Prepare materials and their weight percentages are: reduced iron powder 17.4%, activated carbon powder 4.3%, graphite powder 4.3%, quartz powder 17.2%, tourmaline powder 4.4%, diatomite 4.4%, zeolite powder 8.6%, volcanic stone powder 4.4%, medical stone powder 4.4%, ammonium bicarbonate 0.5%, sodium bentonite 30%; after mixing uniformly, an inorganic mixture is obtained.

[0042] Step 2: Disperse the graphene with a weight of 1% by weight of the inorganic mixture with a dispersant (sodium dodecyl sulfate) (wherein 1g of graphene is put into 0.07g of the dispersant, and the concentration is recommended not to exceed 2mg / mL when configuring the dispersion liquid, That is, 0.07g of dispersant is put into 35mL of distilled water) for subsequent use.

[0043] Step 3: The dispersed graphene and the tap water (chlorinated water) whose weigh...

Embodiment 2

[0051] The porous biological filler prepared in Example 1 was filled into a cylindrical plexiglass column (10 cm in diameter, 70 cm in height; the reactor was completely covered with tin foil), and the bottom layer of the cylindrical column was filled with about 5 cm of gravel filler as a supporting layer, and then filled with 50cm porous biological packing; a water distribution tank with a working volume of 10L was used. The temperature of the water distribution tank was controlled by an electric heater at a temperature of 25 °C, and the influent water was controlled by a peristaltic pump at the same flow rate. For waste water, the water level was adjusted to 5 cm above the surface of the filler, and the cylindrical reactor was continuously operated at 25°C for 2 months to a stable hanging period, and then the pollutant removal experiment was started.

[0052] Further, glucose, potassium nitrate, ammonium chloride, and potassium dihydrogen phosphate were added to the tap water...

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Abstract

The invention discloses a porous biological filler for purifying polluted seawater as well as a preparation method and application of the porous biological filler, and belongs to the technical field of sewage treatment. The biological filler is composed of an external porous mineral sphere and an embedded carbon source organism, the mass ratio of the porous mineral sphere to the embedded carbon source organism is 7.5-8.5: 1.5-2.5, the porous mineral sphere has a single channel and a porous skeleton structure, the embedded carbon source organism forms a slow-release organic carbon source, and the slow-release organic carbon source forms a slow-release carbon source. The biological filler contains a plurality of mineral substances, has a large surface area due to intercommunication of gaps, and has the advantages of slow release of a carbon source, facilitation of biological redox and the like. The porous biological filler prepared by the invention has a relatively large specific surface area, a communicated pore structure, multiple mineral components, a slow-release organic carbon source and a substance for promoting electron transfer, is not easy to harden, and can obviously improve the problems of slow growth, difficult aggregation and the like of water treatment microorganisms caused by the conditions of high seawater salinity and the like; the method can be used for removing pollutants in polluted seawater, and especially has an ideal nitrogen removal effect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a porous biological filler for purifying polluted seawater, a preparation method and application thereof, and can be widely used in the treatment of seawater polluted by nitrogen-containing and organic compounds to meet higher treatment requirements . Background technique [0002] Marine-related industries such as marine aquaculture produce a large amount of polluted seawater containing various organic matter and nitrogen compounds; for example, the excretion products and remaining bait of organisms in the process of marine aquaculture increase the concentration of nitrogen pollutants and organic matter in the marine environment, causing marine pollution; due to the adverse effects of seawater salinity and other factors, water treatment microorganisms cannot produce a high removal rate of pollutants like in freshwater environments, and a considerable part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/00C02F3/28C02F101/16C02F101/38C02F103/08C04B111/40
CPCC04B28/001C02F3/2806C02F2101/16C02F2101/38C02F2305/06C02F2103/08C04B2111/40C04B2201/20C04B22/04C04B22/126C04B14/022C04B14/024C04B14/06C04B14/08C04B14/047C04B14/14C04B14/36C04B24/045C04B24/283C04B24/38C04B24/026C04B18/24C04B24/10C04B38/02C04B38/0074C04B38/0067Y02W10/10
Inventor 韩蕊吴英海李可心张翠雅张倩马贺衣隆强
Owner DALIAN OCEAN UNIV
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