Method for separating active protein in sewage treatment process

A technology for active protein and sewage treatment, which is applied in the field of active protein separation and can solve the problem that active protein cannot be fully utilized.

Active Publication Date: 2014-10-29
SHANDONG XIWANG SUGAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims at the problem that the active protein in the sewage cannot be fully utilized in the prior art, and provides a method for separating the active protein in the process of sewage treatment

Method used

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  • Method for separating active protein in sewage treatment process
  • Method for separating active protein in sewage treatment process

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Experimental program
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Embodiment 1

[0031] Embodiment 1 A kind of method for separating active protein in sewage treatment process, comprises the following steps:

[0032] 1. Sedimentation in a settling tank

[0033] The sewage is introduced into a settling tank. According to the characteristics of high pollution concentration and fast sedimentation rate of sewage, natural sedimentation is used to remove suspended solids with a mass fraction of 70-80% and COD with a mass fraction of 8%-12%.

[0034] 2. Treatment in the adjustment pool

[0035] The sewage is introduced into the adjustment tank, and the pH value of the sewage is adjusted with soda ash, and the pH value is 7.0, which is conducive to improving the activity of anaerobic bacteria under this condition.

[0036] 3. UASB reactor treatment

[0037] The treated sewage in the regulating tank enters the reactor through the bottom of the UASB reactor, and the sewage flows upward through the sludge bed area to contact with a large number of anaerobic bacteri...

Embodiment 2

[0049] Embodiment 2 A kind of method for separating active protein in sewage treatment process

[0050] The active protein in the sludge that obtains in embodiment 1 step 5 is separated:

[0051] (1) Transfer 500g of the sludge obtained in step 5 to a beaker, add 500g of water and stir for 3 minutes to obtain a sludge suspension with a mass fraction of 80% water, and then settle for 30 minutes. Among them, fungi, Active proteins such as algae will float on the upper layer of the liquid surface, and the upper layer of the sludge tank is taken to obtain 720g of active protein slurry. The mass fraction of dry matter contained in the active protein slurry is 5.2%.

[0052] (2) Filter the active protein slurry obtained in step (1) with filter paper to obtain 363.5 g of a material with a dry matter content of 10.3%.

[0053] (3) Put the material obtained in step (2) into a beaker, add water to the beaker, and stir to obtain 913.2 g of the material, with a mass fraction of dry matte...

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Abstract

The invention relates to a method for separating an active protein in a sewage treatment process. The method comprises the following steps: settling sewage in a primary sedimentation tank, settling in a secondary sedimentation tank to obtain sludge after treatment in a regulating reservoir, a UASB reactor and an oxidation pond, and then separating the active protein from the sludge, wherein the separating step comprises the following processes: transferring the sludge to a sludge tank to treat, so as to obtain active protein slurry containing 4.5-5.5% by mass of dry matters, filtering, washing and adjusting the active protein slurry to obtain an active protein material containing 30% by mass of dry matters, then drying the active protein material into the material containing 88-93% of dry matters, and crushing and screening the material by a 200-mesh sieve. By adopting the method, the problem that the active protein in the sludge cannot be fully utilized in the prior art is overcome, the active protein obtained by the method achieves the quality requirements of feed additive protein powder, the additional value of products is increased when the active protein is applied to production of high protein feeds, and the economic benefits of enterprises are increased.

Description

technical field [0001] The invention relates to a method for separating active protein, in particular to a method for separating active protein in a sewage treatment process, and belongs to the field of deep processing of active protein. Background technique [0002] In the prior art, the general method of wastewater treatment is: the wastewater enters a high-efficiency anaerobic reactor for anaerobic digestion, and most of the organic matter in the wastewater is degraded by anaerobic microorganisms and converted into methane, carbon dioxide, water and other substances. The anaerobic effluent flows into the A / O system. In the A / O system, the remaining organic matter is oxidized into carbon dioxide and water by aerobic microorganisms. The ammonia nitrogen is first converted into nitric acid and nitrite nitrogen in the O tank, and then reduced to Nitrogen, so that ammonia nitrogen and total nitrogen are removed. The effluent from the A / O tank enters the secondary settling tan...

Claims

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Application Information

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IPC IPC(8): C02F9/14C07K1/34
Inventor 王棣王岩陶兴发葛金华王非
Owner SHANDONG XIWANG SUGAR
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