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Microalgal culture based biogas liquid treatment device and method

A technology for biogas slurry treatment and microalgae cultivation, applied in enzymatic/microbiology devices, filtration treatment, multi-stage water treatment, etc. Algae utilization efficiency and other issues, to achieve the effect of high value-added comprehensive utilization, harmless and simple structure

Active Publication Date: 2016-06-01
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of this device are: first, the main purpose of this device is to cultivate microalgae, and the treatment effect on wastewater is not good; second, the CO produced during the fermentation of wastewater by this device 2 The uneven distribution in the microalgae cultivation chamber reduces the CO of microalgae 2 Utilization efficiency affects the treatment effect of microalgae on high-concentration ammonia nitrogen in wastewater; thirdly, the pretreatment method of the device is a single anaerobic fermentation, and the high-concentration ammonia nitrogen produced in the process will inhibit the growth of microalgae and reduce the efficiency of the entire system. efficiency

Method used

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  • Microalgal culture based biogas liquid treatment device and method

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Effect test

Embodiment 1

[0038] Taking the pig biogas slurry as the treatment object, the ammonia nitrogen in the biogas slurry is 1073mg / L, the total alkalinity is 5422mg / L, the total phosphorus is 46mg / L, and the COD is 2655mg / L.

[0039] The biogas slurry treatment is carried out in the following steps, the details are as follows:

[0040] (1) After the biogas slurry undergoes natural precipitation and coagulation to remove part of COD, ammonia nitrogen, total phosphorus and large suspended particles, the biogas slurry stock solution is obtained. The biogas slurry stock solution enters the adjustment tank and is diluted 4 times by the effluent of the microalgae concentration device. , enter the biogas slurry treatment device, and control the flow rate of the biogas slurry to 0.3L / h when entering water.

[0041] When the water enters, the ammonia nitrogen in the biogas slurry is 257mg / L, the total alkalinity is 1218mg / L, the total phosphorus is 9mg / L, and the COD is 579mg / L.

[0042] (2) The biogas...

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Abstract

The invention discloses a microalgal culture based biogas liquid treatment device and method. The biogas liquid treatment device comprises a tank body, wherein a water outlet is formed in the top of the tank body; a water inlet is formed in the bottom of the tank body; an interlayer is arranged in the tank body and used for dividing the tank body into an upper microalgal culture chamber and a lower pretreatment chamber; a plurality of channels used for conveying materials into the microalgal culture chamber are formed in the interlayer; a filter device is arranged in each channel; the pretreatment chamber is divided into an upper aerobic reaction region and a lower facultative reaction region; solid fillers are arranged in each of the facultative reaction region and the aerobic reaction region; and an aeration device is further arranged at the lower part of the solid fillers in the aerobic reaction region. The biogas liquid treatment device has a good biogas liquid treatment effect and can achieve the purpose of treating high-concentration ammonia-nitrogen wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a biogas slurry treatment device and method based on microalgae cultivation. Background technique [0002] Livestock and poultry breeding wastewater is a kind of high-concentration organic wastewater, with high pollutant concentration and large wastewater discharge, which seriously pollutes the surrounding environment, especially the discharge of high-concentration nitrogen and phosphorus can easily cause eutrophication of surface water. The development of large and medium-sized biogas digesters can convert livestock and poultry polluted wastewater into biogas and fertilizers; however, livestock and poultry wastewater will produce a large amount of residual liquid during anaerobic fermentation, which is biogas slurry, which has become a new source of pollution . [0003] At present, the commonly used biogas slurry treatment methods can be divided into four categorie...

Claims

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Application Information

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IPC IPC(8): C02F9/14C12M1/34C12M1/04C12N1/12
CPCC02F1/001C02F1/444C02F3/02C02F3/322C02F9/00C02F2301/08C12M29/06C12M41/26C12M41/34C12N1/12
Inventor 国青青刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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