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Anaerobic ammonia oxidation coupled ammonia distillation denitrification method and device for coking wastewater

A technology for anaerobic ammonia oxidation and coking wastewater, applied in anaerobic digestion treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of difficult control of denitrification process, difficult stable operation, limited total nitrogen TN amount, etc. Achieve the effect of reducing processing capacity, saving aeration volume, and reducing operating costs

Pending Publication Date: 2021-06-18
BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ammonia nitrogen concentration after ammonia distillation in the current ammonia distillation process is less than 100mg / L. If the anaerobic ammonium oxidation process is used to remove nitrogen, the ammonia nitrogen concentration is low, and it is difficult for the system to stably control the ammonia nitrogen oxidation process at the nitrite stage, and the denitrification process is difficult to control. The removal of total nitrogen TN is limited, and it is difficult to operate stably

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  • Anaerobic ammonia oxidation coupled ammonia distillation denitrification method and device for coking wastewater

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Effect test

Embodiment 1

[0115] Raw water of coking wastewater from a coking plant (the concentration of ammonia nitrogen is 4800mg / L (C 0 ), the COD is 4600mg / L, and the water temperature is 30°C), use the water inlet pump 1-2 to lift part of the coking wastewater into the ammonia distillation tower 1-1, measure the water intake through the ammonia distillation water flow meter 1-4, and measure the water intake through the ammonia distillation water flow meter 1-4. Regulating valve 1-3 adjusts the flow rate, carries out ammonia distillation treatment, obtains ammonia distillation effluent; ammonia nitrogen concentration is 80mg / L (C 1 ), nitrate nitrogen is 250mg / L, COD is 3000mg / L;

[0116] After the ammonia distillation effluent is cooled by the cooling system 1-7, the cooling effluent (T 1 );

[0117] The remaining raw water of undistilled ammonia coking wastewater that has not entered the ammonia distillation tower is measured by crossing the water inlet flow meter 1-6, and is mixed with the co...

Embodiment 2

[0123] A certain iron and steel enterprise, supporting a coking enterprise within the enterprise, the ammonia nitrogen concentration of the coking wastewater raw water is 4000mg / L (C 0 ), the water temperature is 60°C, the factory is equipped with a sewage treatment system, and part of the coking wastewater is treated with ammonia distillation. 1 );

[0124] Mix the ammonia-distilled effluent with the undistilled ammonia coking wastewater raw water, and cool the resulting mixed water to obtain cooled mixed wastewater; control the ammonia nitrogen concentration C of the cooled mixed wastewater to be 500 mg / L, and calculate the proportion of the undistilled ammonia coking wastewater The proportion of total water n=(C-C 1 ) / (C 0 -C 1)=(500-150) / (4000-150)=9.09%, that is, 90.91% of the raw water enters the ammonia distillation system, 9.09% of the raw water does not enter the ammonia distillation system, and mixes 9.09% of the coking wastewater raw water with 90.91% of the ammo...

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Abstract

The invention provides a coking wastewater anaerobic ammonia oxidation coupling ammonia distillation denitrification method and device, and belongs to the technical field of wastewater treatment. According to the method, part of the coking wastewater is subjected to ammonia distillation treatment, obtained ammonia distillation effluent is cooled and then mixed with the coking wastewater without ammonia distillation (or the ammonia distillation effluent is directly mixed with the coking wastewater without ammonia distillation and then is cooled), so that the water temperature and the ammonia nitrogen concentration of the mixed wastewater can be adjusted to be in a suitable interval for anaerobic ammonia oxidation; stable operation of the anaerobic ammonia oxidation system is guaranteed; meanwhile, the operation cost of ammonia distillation is reduced; and the problems that the water temperature is difficult to reduce after ammonia distillation, the operation temperature of a biochemical system is high, the microbial activity is low, the treatment effect is poor and the operation is unstable are solved. Meanwhile, by controlling the ammonia nitrogen concentration in the optimal interval of anaerobic ammonia oxidation operation, the biochemical system can adopt an anaerobic ammonia oxidation technology for denitrification instead of a traditional nitration and denitrification substitution technology, so that the denitrification efficiency is improved, the operation cost is reduced, and no by-product is generated.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a coking wastewater anaerobic ammonium oxidation coupled ammonia distillation and denitrification method and device. Background technique [0002] The ammonia nitrogen concentration of coking wastewater is 3000-5000mg / L, and the water temperature of coking wastewater is 30-60°C. Traditional treatment systems need to remove ammonia nitrogen in coking wastewater through an ammonia distillation system, and the concentration of ammonia nitrogen in the effluent is 100mg / L. However, the general ammonia distillation process needs to heat the water temperature of coking wastewater to above 90°C, but the ammonia distillation process is followed by the traditional nitrification and denitrification process, and the water temperature needs to be lowered to below 35°C through a circulating cooling system before entering the subsequent biochemical system for treatment. However, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F103/34
CPCC02F1/048C02F3/28C02F3/303C02F3/305C02F3/307C02F2101/16C02F2103/34C02F2209/02C02F2209/08C02F2209/14C02F2209/15C02F2209/16C02F2209/38
Inventor 田盛杨岸明
Owner BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO