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Processing method of coking steaming ammonia wastewater

A technology for ammonia steaming wastewater and treatment method, applied in the field of water treatment, can solve the problem of high investment cost of tertiary treatment process, achieve high oxygen transfer efficiency and high biochemical reaction efficiency, increase cascade use and recycling, and be difficult to sludge bulking. Effect

Active Publication Date: 2015-03-11
ANGANG STEEL CO LTD
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Problems solved by technology

However, the operation and investment costs of the tertiary treatment process are relatively high. If an appropriate pretreatment process can be selected, the content of toxic factors entering the secondary biochemical system can be greatly reduced after pretreatment, and the biodegradability of wastewater can be improved. In addition, the subsequent use of an efficient biochemical treatment system to strengthen the treatment of effluent water quality, in order to replace the costly tertiary treatment process, has important practical significance for the sustainable development of enterprises

Method used

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  • Processing method of coking steaming ammonia wastewater
  • Processing method of coking steaming ammonia wastewater
  • Processing method of coking steaming ammonia wastewater

Examples

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Effect test

Embodiment 1

[0022] Slowly add concentrated sulfuric acid to the ammonia distillation wastewater in the adjustment tank while stirring, control the pH of the ammonia distillation wastewater to 2.6, and then inject the ammonia distillation wastewater into the upper part of the rectangular inner electrolysis reactor by the pump to carry out the internal electrolysis reaction. The filler is composed of iron and steel filings and activated carbon particles, which are filled in the reactor with a volume ratio of 1:1. Keep the residence time of ammonia distilled wastewater in the internal electrolysis reactor at 0.5h, and the effluent flows into the Fenton oxidation tank.

[0023] The Fenton oxidation tank is operated intermittently. After the wastewater in the tank reaches 3 / 4, it starts stirring and adds concentrated sulfuric acid at the same time to control the pH value to 2.8. Add ferrous sulfate solid at one time, so that the concentration of ferrous ions reaches 100ppm, and then slowly add...

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Abstract

The invention discloses a processing method of coking steaming ammonia wastewater. The processing method of the coking steaming ammonia wastewater comprises pretreatment of coking steaming ammonia wastewater and biochemical treatment of the coking ammonia wastewater. The pretreatment of the coking steaming ammonia wastewater uses an adjusting pool, an internal electrolysis reactor, a Fenton oxidation pond and a coagulative precipitation tank. A sequencing batch membrane bioreactor technology is adopted by the biochemical treatment, and working procedures of inflow, unused-leaving, reacting and discharging are sequentially performed according to a time period. The processing method of the coking steaming ammonia wastewater can effectively remove persistent organic pollutants and ammonia nitrogen, strengthen effluent quality, and reduce operational and investing costs of equipment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a treatment method for coking ammonia distillation wastewater. Background technique [0002] The metallurgical industry is a super large pollutant discharge in my country, and coking wastewater is one of the largest pollution sources in the metallurgical industry. In addition to a large amount of volatile phenols, COD, cyanides, and sulfides, coking wastewater also contains high concentrations of ammonia nitrogen and many refractory fused-ring aromatics and heterocyclic compounds, such as indole, naphthalene, quinoline, etc., which are harmful to the environment. It has a great impact and is considered to be one of the most difficult industrial wastewater. It has been a difficult problem for various metallurgical enterprises in the country for a long time. In recent years, with the development of my country's iron and steel industry, the scale of the corresponding coking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 陈鹏胡绍伟王永王飞徐伟
Owner ANGANG STEEL CO LTD
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