A method for recycling fermentation bacteria and treating waste water

A technology for fermenting bacteria and collecting bacteria, which is applied in chemical instruments and methods, neutralized water/sewage treatment, aerobic and anaerobic process treatment, etc. Low added value and other issues to achieve the effect of avoiding excessive proliferation, simple process and high porosity

Active Publication Date: 2021-12-28
内蒙古阜丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The applicant has conducted long-term research on the treatment of xanthan gum fermentation wastewater. Chinese patent technology "CN104313004A, a preparation for treating xanthan gum production sewage" discloses a preparation for treating xanthan gum production sewage, which is a carrier and The composite microbial agent is prepared by mixing according to the weight ratio of 2:1. The carrier is chitosan. There are many bacterial strains contained in this preparation, the cultivation operation process is relatively difficult, and it cannot be reused.
The Chinese patented technology "CN106882909A, Environmental Protection Technology for Treatment of Xanthan Gum Fermentation Wastewater" also uses a biological agent, which is prepared by mixing four kinds of bacteria and a carrier, and the carrier is made of zeolite, kaolinite, starch, chitosan It is sintered from other raw materials, has good adhesion, can be suspended in water, reduces the sludge output, and can be reused by calcination, but the biological preparation cannot thoroughly ammonia nitrogen, and the water contains a large amount of nitronitrogen and nitrosonitrogen
[0007] Xanthan gum fermentation waste contains a large amount of bacterial protein. In order to save production costs and avoid waste of available resources, the applicant's previous invention patent technology "A method for utilizing threonine bacterial protein" processes bacterial protein into Protein feed has achieved certain economic benefits, but its industrial added value is relatively low, and its application potential has not been fully explored; how to effectively use bacterial protein and improve efficiency is a technical problem that manufacturers need to solve

Method used

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  • A method for recycling fermentation bacteria and treating waste water
  • A method for recycling fermentation bacteria and treating waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A biological agent for treating waste water from a xanthan gum fermentation process, which is prepared according to the following process:

[0038] Mix kaolin and bentonite according to the mass ratio of 2:1, and then add them to a ball mill equipped with ball milling media (5mm silicon carbide balls, mass ratio of material balls: 1:5) for ball milling for 30min, dry at 80°C for 15min, and then pass 100 Mesh sieve to collect undersize;

[0039] Mix polyvinyl alcohol, attapulgite, urea, water, and undersieve according to the mass ratio of 3:5:7:70:100, and then put them into a granulator for granulation to obtain wet granules with a diameter of 1mm , then placed in 80 ℃ drying for 30 minutes, then placed in a resistance furnace for calcination at 1000 ℃ for 30 minutes, after natural cooling, ceramsite was obtained;

[0040] Mix bacterial agent A and ceramsite according to the ratio of 1L:2kg, and culture at 30°C for 6h.

[0041] Then add bacterial agent B, 40g / L sodium...

Embodiment 2

[0046] A biological agent for treating waste water from a xanthan gum fermentation process, which is prepared according to the following process:

[0047] Mix kaolin and bentonite according to the mass ratio of 2:1, and then add them to a ball mill equipped with ball milling media (5mm silicon carbide balls, mass ratio of material balls: 1:5) for ball milling for 30min, dry at 80°C for 15min, and then pass 100 Mesh sieve to collect undersize;

[0048] Mix polyvinyl alcohol, attapulgite, urea, water, and undersize according to the mass ratio of 3:5:7:70:100, and then put them into a granulator for granulation to obtain wet granules with a diameter of 2mm , then placed in 80 ℃ drying for 30 minutes, then placed in a resistance furnace for calcination at 1000 ℃ for 40 minutes, after natural cooling, ceramsite was obtained;

[0049] Mix bacterial agent A and ceramsite according to the ratio of 1L:2kg, and culture at 30°C for 6h.

[0050] Then add bacteria agent B, 50g / L sodium a...

Embodiment 3

[0056] Index detection of ceramsite in the present invention.

[0057] Porosity: use the boiling method of GB / T1966-1996 to measure the porosity of the sample;

[0058] Mechanical strength: measured by GBT1965 / 1996 test method for bending strength of porous ceramics.

[0059] The specific indicators are shown in Table 1:

[0060] Table 1

[0061] group Porosity% Mechanical Strength Mpa Density g / ml Example 1 72.8 14.6 1.04 Example 2 70.6 15.3 1.08

[0062] It can be seen that the porosity of the ceramsite carrier of the present invention reaches more than 70%, the pore diameter is between 0.1-10 microns, it is easy to process, the strength is high, the porosity is high, the density is close to water, it is in a suspended state, and the dispersion in waste water is good , which is conducive to the rapid adsorption and treatment of pollutants.

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Abstract

The invention belongs to the technical field of waste water treatment, and discloses a method for recycling fermentation cells and treating waste water, which comprises the following steps: separating the xanthan gum fermentation liquid through a disc separator with a rotating speed of 4000 rpm and a centrifugation time of 5 min , collecting the bacterial cell sediment and the upper liquid; the bacterial cell sediment is used to prepare bacterial protein powder, the upper layer liquid is used to extract xanthan gum, and the generated wastewater is subjected to a wastewater treatment process. The invention utilizes discarded bacterial protein to prepare bacterial protein powder with comprehensive nutritional components, which can be used to replace yeast extract, reduces the cost of fermentation medium, and comprehensively treats waste water.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for recycling fermentation bacteria and treating waste water. Background technique [0002] Water is the most precious wealth on earth and an indispensable material for the survival and development of human beings and all living things. At present, most of the fresh water resources on the earth that can be used by people are the surface water in the underground aquifer below the depth of 800m, accounting for only 2.6%. In fact, the water resources that can really be used as human life and production are only global a very small portion of the total water volume. The world's water crisis has seriously threatened the survival of human beings. More than one-fifth of the world's people will face medium-to-high water shortages. This pressure is warning the world of water shortages. The total amount of water resources in my country ranks fourth in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/34C02F3/30C02F101/16
CPCC02F3/34C02F3/302C02F9/00C02F2003/001C02F1/001C02F2001/007C02F1/66C02F1/50C02F2101/16C02F2303/04
Inventor 卢松王峰伏广好杜鹏郄子玥
Owner 内蒙古阜丰生物科技有限公司
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