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Treatment method for improving biodegradability of refractory organic wastewater

A technology of organic wastewater and treatment methods, which is applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., and can solve the problems of large equipment investment and high transportation costs

Pending Publication Date: 2021-12-24
FIRST RARE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Advanced oxidation and other physical and chemical methods need to be used for pretreatment before the deep removal treatment can be carried out in the biochemical pool, resulting in large investment in equipment and high transportation costs, which has become one of the key restrictive factors for the development of the ultrafine spherical silver powder manufacturing industry.

Method used

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  • Treatment method for improving biodegradability of refractory organic wastewater
  • Treatment method for improving biodegradability of refractory organic wastewater
  • Treatment method for improving biodegradability of refractory organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16

[0034] The reaction parameters of the treatment methods for improving the biodegradability of refractory organic wastewater described in Examples 1 to 16 are shown in Table 2, where the unit of temperature is °C, the unit of pressure is kPa, and the unit of time is min.

[0035] The treatment methods for improving the biodegradability of refractory organic wastewater described in Examples 1 to 16 are as follows: placing the organic wastewater in a reactor, adding an oxidant, and reacting at a certain temperature and pressure to obtain the treated wastewater. Organic waste water.

[0036] The NO of the treated organic wastewater described in Examples 1 to 16 was tested respectively 3 -N, COD Cr , NH 3 -N, TN, BOD 5 , BOD 5 / COD Cr , where NO 3 -N, COD Cr , NH 3 -N, TN, BOD 5 The unit is mg / L, and the results are shown in Table 2.

[0037] Table 2

[0038]

[0039]

[0040]

[0041] It can be seen from Table 1 and Table 2 that the COD degradation efficiency in ...

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Abstract

The invention provides a treatment method for improving biodegradability of refractory organic wastewater, and belongs to the field of environmental protection. The method comprises the following steps: putting the organic wastewater into a reactor, adding an oxidizing agent, and reacting at the temperature of 150-300 DEG C and the pressure of 2-6 MPa to obtain the treated organic wastewater. Nitrate nitrogen and other organic pollutants in the organic wastewater can be efficiently degraded through heating and pressurizing, various pollutants can be deeply removed from the treated organic wastewater through common biochemical treatment, the purpose of discharging is achieved, and the method has the advantages of being efficient, energy-saving, economical and reliable.

Description

technical field [0001] The invention relates to a treatment method for improving the biodegradability of refractory organic waste water, and belongs to the field of environmental protection. Background technique [0002] The chemical liquid-phase reduction method is a commonly used process for synthesizing spherical silver ultrafine powder. One of the difficulties in implementing this method in large-scale production is that it produces high concentrations of nitrate nitrogen, organic nitrogen and ammonia nitrogen and is difficult to biochemically degrade the disposal of silver powder mother liquor wastewater. The organic components include macromolecular dispersants, medium and small molecular dehydroascorbic acid and its derivatives, BOD 5 / COD Cr The ratio is very low (less than 0.1), and the biodegradability is poor. At present, the technology for treating this high COD, high salt, high ammonia nitrogen wastewater mainly includes evaporation and concentration, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F9/00C02F1/74C02F1/727C02F1/70C02F3/30C02F2101/30C02F2209/14C02F2209/15C02F2209/16C02F2209/08
Inventor 王继民秦婷婷黄娟邢娜何兵祥王富康谢子欣
Owner FIRST RARE MATERIALS CO LTD
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