Organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor

A technology for organic wastewater treatment and organic wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of low treatment efficiency, high operating cost, complex process, etc. Achieve high processing efficiency and save floor space

Active Publication Date: 2009-11-25
HARBIN INST OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for organic wastewater treatment in which carbon, nitrogen and sulfur are simultaneously removed in one reactor, so as to solve the problems of high operating cost, complex process and low treatment efficiency in the existing methods for treating sulfur-containing and nitrogen-containing sewage

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  • Organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor
  • Organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor
  • Organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor

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specific Embodiment approach 1

[0016] Specific implementation mode one: see figure 1 , the organic wastewater treatment method for synchronous removal of carbon, nitrogen and sulfur in a reactor described in this embodiment comprises the following steps:

[0017] Step 1, using only one fluidized bed reactor 3 organic wastewater carbon, nitrogen and sulfur synchronous removal integrated equipment to treat wastewater; the wastewater (wastewater to be treated) is mainly polluted by sulfate, nitrate and organic matter Sulfur-nitrogen-containing organic wastewater with a mass ratio of sulfur to nitrogen of 0.5-5 and a mass ratio of COD to N of 3-8;

[0018] Step 2. Cultivate granular sludge: First, add activated sludge into the fluidized bed reactor 3; then, introduce the waste water to be treated into the fluidized bed reactor 3, and the volume load of the influent in N shall not exceed 2.0kgN / m 3 d, keep the temperature in the fluidized bed reactor 3 at 20-35°C, the hydraulic retention time (HRT) 4h-16h, an...

specific Embodiment approach 2

[0022] Specific embodiment two: In step one of this embodiment, the sulfur-nitrogen mass ratio is 2-2.5, and the sulfur-nitrogen-containing organic wastewater with a COD and N mass ratio of 3-8, wherein the sulfur-nitrogen mass ratio is 2.5, COD to N mass ratio is 5.0, nitrate volume load is 1.5kgN / m 3 When d, the removal effect is the best, and the removal rate of sulfate, nitrate and organic matter reaches 98%, 98% and 80% respectively. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation method three: In step two of this embodiment, the trace element solution contains 500 mg of H per liter. 3 BO 3 , 500mg of ZnCl 2 , 500mg of (NH 4 ) 6 Mo 7 o 24 4H 2 O, 500mg of NiCl·6H 2 O, 500mg of AlCl 3 ·6H 2 O, 500mg of CoCl 2 ·6H 2 O, 500mg of CuSO 4 ·5H 2 O, 1000mg of NaSeO 3 ·5H 2 O, 1500mg of FeCl 3 ·6H 2 O, 5000mg of MnCl 2 4H 2 O and 5 ml of a 37% HCl solution. The addition of trace elements can promote and strengthen the formation of granular sludge, shortening the formation time of granular sludge by half a month. Other steps are the same as in the first embodiment.

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Abstract

An organic waste water processing method with synchronously carbon, nitrogen and sulfur removal in one reactor relates to an organic waste water processing method. The invention settles the problems of high operating cost and low processing efficiency in the prior method for processing the sulfur-containing nitrogen-containing sewage. The method of the invention mainly comprises the following steps: (1) cultivating the particle sludge; (2) strengthening the autotrophic denitrification desulfurizing microorganism; and (3) in one fluid bed reactor, respectively converting the organic matter, the sulphate and the nitrate in the wastewater to the carbon dioxide, elemental sulfur and nitrogen gas for removing through the synergistic reaction of the autotrophic microorganism and the heterotrophic microorganism thereby completing the synchronously removing of the carbon, the nitrogen and the sulfur. The method of the invention has the advantages of high processing efficiency, more than 98% of the conversion rate of the sulphate and the nitrate, about 80% of the removal rate of the organic matter, no nitrite content in the discharge water, no secondary pollution; small accommodation area and one reaction system required for removing the sulphate, the nitrate and the organic matter.

Description

technical field [0001] The invention relates to a method for treating organic wastewater, belonging to the technical field of wastewater biological treatment. Background technique [0002] In recent years, the pollution of organic wastewater containing sulfur and nitrogen has become increasingly serious. The wastewater discharged from pharmaceutical, fermentation, chemical, food processing, tannery and mining industries in modern industrial production contains organic wastewater with high concentrations of sulfate and ammonia nitrogen. Nitrogen-containing compounds can promote the proliferation of plankton such as algae, thereby causing eutrophication of water bodies and causing algal blooms and red tides; sulfur-containing compounds are reduced by microorganisms under anaerobic conditions, which will not only cause biological corrosion, but also produce toxic The gaseous hydrogen sulfide can easily cause the pH value of the water to drop, which is poisonous to the water bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 王爱杰刘春爽任南琪毕建培张莉刘充
Owner HARBIN INST OF TECH
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