Activated sludge for treating crushed coal gasification wastewater and culturing domestication method and application of activated sludge

A technology of coal gasification wastewater and activated sludge, which is applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problems of dosing, improve adaptability, improve denitrification ability and Nitrification ability, the effect of improving nitrification ability and denitrification ability

Active Publication Date: 2019-05-21
中海油山西能源投资有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activated sludge cultivated by this method has a good effect on sewage treatment, but in the process of cultivating activated sludge using this method, it is necessary to continuously add biological antidotes and biologically active phosphorus.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] This embodiment provides a method for cultivating and acclimating the activated sludge of waste water from crushed coal gasification. The method for cultivating and acclimating comprises the following steps:

[0089] (a) Add water to the A pool of the A / O pool, and make the water overflow from the A pool to the O pool until the water in the O pool is 1 / 3 of the volume of the O pool, and the dosage is 3kg / m 3 Dosing activated sludge with a water content of 75wt.% in water is added in water, exposed for 24 hours, and then cultivated activated sludge at 25°C. During the cultivation, glucose, urea and sodium phosphate were added to the water to make The mass ratio of C, N and P in the water is 100:6:1, CODcr is 450mg / L, the cultivation time is 20d, and every 24h needs to be aerated for 4.5h, and the concentration of dissolved oxygen in O pool water is 8.5mg / L during aeration. L;

[0090] (b) Carry out preliminary intermittent acclimatization to the activated sludge after c...

Embodiment 2

[0095] This embodiment provides a method for cultivating and acclimating the activated sludge of waste water from crushed coal gasification. The method for cultivating and acclimating comprises the following steps:

[0096] (a) Add water to the A pool of the A / O pool, and make the water overflow from the A pool to the O pool until the water in the O pool is 1 / 4 of the volume of the O pool, and the dosage is 2.5kg / m 3Dosing activated sludge with a water content of 80wt.% in water is added to the water, exposed for 22 hours, and then cultivated the activated sludge at 20°C. During the cultivation, methanol, urea and potassium phosphate were added to the water to make The mass ratio of C, N and P in the water is 95:5:1, CODcr is 420mg / L, the cultivation time is 15 days, aeration is required for 4 hours every 24 hours, and the concentration of dissolved oxygen in O pool water during aeration is 8.5mg / L ;

[0097] (b) Carry out preliminary intermittent acclimatization to the activ...

Embodiment 3

[0102] This embodiment provides a method for cultivating and acclimating the activated sludge of waste water from crushed coal gasification. The method for cultivating and acclimating comprises the following steps:

[0103] (a) Add water to the A pool of the A / O pool, and make the water overflow from the A pool to the O pool until the water in the O pool is 1 / 2 of the volume of the O pool, and the dosage is 3.5kg / m 3 Dosing activated sludge with a moisture content of 75wt.% in water is added to the water, exposed for 26 hours, and then the activated sludge is cultivated at 30°C. During the cultivation, sodium acetate, urea and sodium phosphate are added to the water, The mass ratio of C, N and P in the water is 105:7:1, the CODcr is 480mg / L, the cultivation time is 25 days, every 24 hours needs to be aerated for 5 hours, and the concentration of dissolved oxygen in O pool water is 8.5mg / L during aeration. L;

[0104] (b) Carry out preliminary intermittent acclimatization to t...

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Abstract

The invention relates to activated sludge for treating crushed coal gasification wastewater and a culturing domestication method and application of the activated sludge. The culturing domestication method comprises the following steps that 1, a culture solution is added into an A / O tank, the activated sludge is put into the culture solution for closed aeration, and the activated sludge is culturedthrough intermittent aeration; 2, the activated sludge obtained after being cultured through intermittent aeration in the step 1 is domesticated through intermittent aeration; 3, the activated sludgeobtained after being domesticated through intermittent aeration in the step 2 is domesticated through continuous aeration. The activated sludge cultured and domesticated by using the method has gooddegrading effects on CODcr, ammonia nitrogen and total phenols, wherein the removal rate of the CODcr is up to 93.5%, the removal rate of the NH3-N is up to 98.3%, and the removal rate of the total phenols is up to 93%.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a method for cultivating and domesticating activated sludge, in particular to an activated sludge for treating waste water from crushed coal gasification, a method for cultivating and domesticating the same and its application. Background technique [0002] Coal chemical wastewater refers to the wastewater generated during the pretreatment and treatment of coal processing, mainly including gasification wastewater, purification and washing wastewater and wastewater generated by other coal products, which are difficult to treat. The coal chemical industry has many and complex production processes, huge water consumption, and the composition of the wastewater is extremely complex, especially the organic pollutants contained in the waste water from crushed coal gasification include phenols, polycyclic aromatic compounds, and impurities containing nitrogen, oxygen, and sulfur. Cyclic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
Inventor 张文博张志东刘侃刘彦强李耀武许贵彦安文忠李耀智乔英存贾兴国王浩飞汤中文王京立方长传
Owner 中海油山西能源投资有限责任公司
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