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Sewage recovering and microbial protein synthesizing device and method

A microbial protein and sewage technology, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of hidden safety hazards in methane storage, and achieve the effect of saving energy consumption and high economic value

Active Publication Date: 2018-08-17
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that using the nutrients in sewage as carbon and nitrogen sources for microbial protein synthesis has broad prospects in the field of environmental engineering, but there are still two problems: (1) In order to ensure that the synthesized microbial protein can be used as feed, it is necessary to While recovering carbon and nitrogen resources, isolate harmful substances (such as antibiotics, etc.) that may exist in sewage; (2) Methanotrophs need to use methane to grow, but methane is an explosive gas, and a large amount of methane storage has potential safety hazards. need to guard against

Method used

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  • Sewage recovering and microbial protein synthesizing device and method

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Effect test

Embodiment 1

[0030]Embodiment 1: A sewage resource recovery and microbial protein synthesis device, including water intake system A, anaerobic digestion unit B, gas storage and gas supply system C, nanofiltration membrane separation unit D, regulating device E and microbial protein production unit F, the water storage tank A-1 of the water inlet system A is connected to the water inlet valve A-2 through the pipeline, the water inlet valve A-2 is connected to the water inlet pump A-3 through the pipeline, and the water inlet pump A-3 is connected to the anaerobic digestion unit B through the pipeline , the cavity of the anaerobic digestion unit B is connected to the agitator B-4, the lower end of the agitator B-4 is connected to the stirring blade B-5, the suspended sponge carrier B-1 is distributed under the cavity of the oxygen digestion unit B, and the heating and heat preservation device B-6 wraps the outside of the cavity of anaerobic digestion unit B, the upper part of the cavity of an...

Embodiment 2

[0031] Embodiment 2: A sewage resource recovery and microbial protein synthesis device, including water intake system A, anaerobic digestion unit B, gas storage and gas supply system C, nanofiltration membrane separation unit D, regulating device E and microbial protein production unit F.

[0032] The main body of water inlet system A is composed of water storage tank A-1, which can be square, with an effective volume of 3L, a cross-section length of 10cm, width of 10cm, liquid level height of 30cm, and a total height of 40cm.

[0033] It is connected to the anaerobic digestion unit B through the water inlet pipeline through the water inlet valve A-2 and the water inlet pump A-3 (flow rate 0.1-5L / d).

[0034] The main body of the anaerobic digestion unit B is a cylindrical structure with an effective volume of 5L, an inner diameter of 8cm, a liquid level of 25cm, and a total height of 35cm. The bottom is connected to the water inlet pipeline, and the interior is filled with a...

Embodiment 3

[0039] Embodiment 3: a kind of sewage resource recovery and microbial protein synthesis method, containing steps are as follows:

[0040] Step (1), based on a sewage resource recovery and microbial protein synthesis device in the above embodiment, the simulated sewage containing ammonia nitrogen resources, its water quality index COD is 10000mg / L, ammonia nitrogen is 1000mg / L, powered by a water pump with 1L The / d flow sequentially flows through the water inlet system A, the anaerobic digestion unit B and the nanofiltration membrane separation unit D, and then is stored by the regulating device E. The microbial protein production unit F is fed with water once every 3 days, and the water intake is 3L each time. After passing through the above units, pollutants such as organic matter and ammonia nitrogen are reduced, and the removal rates can reach 80-95% and 50-80%, respectively, and are finally discharged by the water outlet system, and the recovery rate of nitrogen resources...

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Abstract

The invention discloses a sewage recovering and microbial protein synthesizing device and method, and belongs to the technical fields of water treatment and recycling. An anaerobic digestion unit decomposes organic substances in sewage and generates methane and carbon dioxide. A nano-filtration membrane separation unit holds back macromolecular harmful substances in effluent from the anaerobic digestion unit and releases the ammonia nitrogen micromolecular substance. Methane and carbon dioxide generated by the anaerobic digestion unit are introduced into a microbial protein production unit; under the interaction between micro-alga and methane oxidizing bacteria, ammonia nitrogen in the effluent from the nano-filtration membrane separation unit is taken as a nutrient to synthesize microbialprotein, the micro-alga uses carbon dioxide as a carbon source and generates oxygen through photosynthesis; methane oxidizing bacteria take methane as a carbon source and utilize oxygen generated bymicro alga to generate carbon dioxide at the same time; three unit are coupled together; and the nano-filtration membrane separation unit effectively isolates the harmful substances in the effluent from the anaerobic digestion unit to guarantee that the subsequent microbial protein production is not influenced by the pollutants.

Description

technical field [0001] The invention relates to a sewage resource recovery and microbial protein synthesis device and method, belonging to the technical field of water treatment and resource utilization. Background technique [0002] Water pollution is one of the most important environmental problems today, and the up-to-standard discharge of organic matter, ammonia nitrogen and other pollutants in sewage still faces great challenges. For a long time, sewage treatment mainly aims at the removal of pollutants, which consumes a lot of energy. Today, under the guidance of the concept of sustainable development, there is an urgent need to develop new green sewage treatment technologies to simultaneously achieve pollutant reduction and resource recovery. [0003] At present, researchers have developed a variety of resource recovery methods for nutrients in sewage. For example, the struvite precipitation method has a high recovery rate of phosphorus in sewage, but its products a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14A23K10/12A23K10/18A23K20/147
CPCA23K10/12A23K10/18A23K20/147C02F1/442C02F3/2806Y02E50/30
Inventor 邢薇姚宏
Owner BEIJING JIAOTONG UNIV
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