Treatment method of chemical wastewater containing nitrogen heterocyclic compounds

A technology for nitrogen heterocyclic compounds and chemical wastewater, applied in biological water/sewage treatment, water/sewage treatment, anaerobic digestion treatment, etc., can solve the problem of further improvement of treatment effect, low load impact resistance, and biological toxicity resistance Weakness and other problems, to avoid continuous release of ammonia nitrogen, improve load impact resistance, and avoid toxic effects

Inactive Publication Date: 2019-11-29
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems in the existing nitrogen-containing heterocyclic compound wastewater treatment technology, such as low load impact resistance, weak biological toxicity resistance, treatment effect to be further improved, and high operating costs, the present invention provides a nitrogen-containing heterocyclic compound chemical wastewater treatment method

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  • Treatment method of chemical wastewater containing nitrogen heterocyclic compounds
  • Treatment method of chemical wastewater containing nitrogen heterocyclic compounds
  • Treatment method of chemical wastewater containing nitrogen heterocyclic compounds

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Effect test

Embodiment 1

[0035] Such as figure 1 Shown, the processing method of a kind of nitrogen-containing heterocyclic compound chemical industry waste water of the present invention, concrete steps are:

[0036] S10. Collect the actual production wastewater from a chemical company that produces 4,6-dihydroxypyrimidine (DHP) in a wastewater collection pool. The specific indicators of the wastewater quality are shown in Table 1 below. Adjust the pH of the waste water to 6 to 8, which is pH 7.5 in this embodiment, then pump the waste water into the coagulation sedimentation tank, add coagulant and flocculant to the coagulation sedimentation tank for coagulation and sedimentation treatment to remove the waste water The suspended particles in the waste water A and sediment are obtained. After the sediment is press-filtered and dehydrated, the solid precipitation waste and the filtrate are obtained. The filtrate is recycled to the water inlet pipe of the coagulation sedimentation tank, and the coagula...

Embodiment 2

[0050] The basic content of this embodiment is the same as that of Example 1, and the difference is that this embodiment treats the production wastewater of a certain pharmaceutical company containing quinoline, and the specific indicators of the wastewater quality are as follows:

[0051] Table 3 Pharmaceutical wastewater water quality indicators

[0052]

[0053] In this embodiment, the production wastewater from a quinoline-containing pharmaceutical company is collected in a wastewater collection tank, and the pH of the wastewater is adjusted to 6.0. Then the wastewater is pumped into the coagulation sedimentation tank for coagulation and sedimentation treatment, so as to remove the suspended particles in the wastewater. The wastewater A after coagulation and sedimentation enters the electrolysis generating tank and the electrolytic reaction tank in turn. The anode in the electrolysis generating tank is RuO 2 -IrO 2 -SnO 2 / Ti, the cathode is graphite; the electrolysi...

Embodiment 3

[0058] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that this embodiment treats the oil trap + air flotation effluent of a certain coal chemical sewage treatment station, and the specific indicators of the oil trap + air flotation effluent water quality as follows:

[0059] Table 5 Water quality indicators of a coal chemical oil trap + air flotation effluent

[0060]

[0061] In this embodiment, waste water is collected in a waste water collection tank, and the pH of the waste water is adjusted to 8.0. Then the wastewater is pumped into the coagulation sedimentation tank for coagulation and sedimentation treatment, so as to remove the suspended particles in the wastewater. The wastewater A after coagulation and sedimentation enters the electrolysis generating tank and the electrolytic reaction tank in turn. The anode in the electrolysis generating tank is RuO 2 -IrO 2 -SnO 2 -Sb 2 o 5 / Ti, the cathode is 316L; the electro...

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Abstract

The invention discloses a method for treating chemical wastewater containing nitrogen heterocyclic compounds, belonging to the field of wastewater treatment. According to the invention, through the combined pretreatment of an electrolysis generating tank and an electrolysis reaction tank, the nitrogen heterocyclic compounds are subjected to ring-opening chain scission to reduce biological toxicity, heterocyclic organic nitrogen is completely converted into ammonia nitrogen, and continuous release of the ammonia nitrogen in the subsequent biological treatment process is avoided; and then anaerobic biological treatment and biological denitrification reaction systems are combined for treatment. The method has the advantages of strong load impact capability, easy operation and control and lowoperation cost, and especially has good treatment effect on chemical wastewater containing nitrogen heterocyclic compounds.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically relates to a treatment method for nitrogen-containing heterocyclic compound chemical wastewater. Background technique [0002] Heterocyclic compound refers to an organic compound containing a heterocyclic structure in the molecule. In addition to carbon atoms, the atoms constituting the ring contain at least one heteroatom. The most common heteroatoms are nitrogen atoms, sulfur atoms and oxygen atoms. Heterocyclic compounds are commonly found in the pharmaceutical chemical industry, dye chemical industry and other industries, and among the many heterocyclic compounds, the heterocyclic compounds containing nitrogen atoms are the most common. [0003] Nitrogen-containing heterocyclic compounds are mostly toxic, harmful and refractory organic compounds, relatively stable in nature, not easily destroyed in the metabolic process, highly toxic, serious environmental pollution a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F1/4672C02F1/52C02F3/00C02F3/28C02F3/30C02F9/00C02F2001/46138C02F2101/38C02F2209/06C02F2209/08C02F2209/14C02F2209/16
Inventor 姜笔存谢实涛曲艳南于伟华宋均轲
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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