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Coupling treatment device and coupling treatment method for sweet sorghum fuel ethanol wastewater circumfluence bioreactor

A fuel ethanol wastewater and bioreactor technology, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of low crude protein content, difficult to handle waste residue, suspended solids content High-level problems, to achieve the effect of high treatment efficiency, short start-up time and high sludge concentration

Inactive Publication Date: 2010-07-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the waste dregs produced from raw materials such as corn and wheat to produce ethanol, the dregs are generally filtered through a plate-and-frame filter, and the filter residue is treated as DDG, or the dregs are directly passed through multi-effect concentrated feed to produce DDGS whole dregs feed, while After filtering sweet sorghum alcohol waste water (waste), the residue is dried or directly concentrated, and the solids obtained are mostly cellulose, with a very low crude protein content, which is not suitable for use as feed and has no economic value, and this process consumes a lot of calories
Moreover, the content of suspended solids in wastewater is high, mainly refractory cellulose, hemicellulose and lignin, etc., which are not suitable for direct application of high-speed anaerobic reactors such as UASB and EGSB. waste residue
The traditional anaerobic contact method requires a long residence time and a large footprint

Method used

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  • Coupling treatment device and coupling treatment method for sweet sorghum fuel ethanol wastewater circumfluence bioreactor
  • Coupling treatment device and coupling treatment method for sweet sorghum fuel ethanol wastewater circumfluence bioreactor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 30% normal temperature anaerobic activated sludge is connected to the anaerobic reactor, the effective volume of the anaerobic reactor is 10L, the diameter of the outer shell is 120mm, the height is 900mm, the diameter of the diversion tube is 80mm, the height is 800mm, the diameter of the settlement zone is 200mm, and the height is 100mm. The reactor temperature is 3335°C, the sweet sorghum fuel ethanol wastewater is diluted 5 times intermittently for 3 days, the water is fed continuously, the hydraulic retention time is 96h, the reflux rate is 35L / h, the COD removal rate of the effluent is higher than 75%, the concentration of the influent water is increased, and the gradient domestication is rich Collect activated sludge, after 18 days of gradient acclimatization, the raw water is directly fed into the water, the temperature of the reactor is raised to 55°C at 1°C / d, the temperature range is controlled at 53-55°C, and the COD removal rate of the anaerobic effluent reac...

Embodiment 2

[0030] The effective volume of the anaerobic internal circulation bioreactor is 5L, the diameter of the outer shell is 95mm, the height is 720mm, the diameter of the guide tube is 60mm, the height is 500mm, the diameter of the settlement zone is 160mm, and the height is 60mm; the effective volume of the aerobic circulation bioreactor is 1L, and the outer shell The diameter is 55mm, the height is 500mm, the diameter of the guide tube is 30mm, and the height is 390mm; the volume of the settler is 0.5L; start the coupling device according to the method in Example 1.

[0031] Sweet sorghum fuel ethanol wastewater COD24500-25000mg / L, SS10500-11000mg / L, pH4.5, directly into the coupling device for treatment without pretreatment, anaerobic internal circulation bioreactor operating temperature 53-55 ℃, reflux pump flow 21- 23L / h, the hydraulic retention time is 72 hours; the operating temperature of the aerobic circulation bioreactor is 33-35°C, and the air velocity is 0.035-0.040m 3 ...

Embodiment 3

[0033] The effective volume of the anaerobic internal circulation bioreactor is 3L, the diameter of the outer shell is 92mm, the height is 460mm, the diameter of the guide tube is 60mm, the height is 400mm, the diameter of the settlement zone is 160mm, and the height is 50mm; the effective volume of the aerobic circulation bioreactor is 1L, and the outer shell The diameter is 55mm, the height is 500mm, the diameter of the guide tube is 30mm, and the height is 390mm; the volume of the settler is 0.5L; start the coupling device according to the method in Example 1.

[0034] Sweet sorghum fuel ethanol wastewater COD15500-16000mg / L, SS7500-8000mg / L, pH3.5, without pretreatment, directly enters the coupling device for treatment, the operating temperature of the anaerobic internal circulation bioreactor is 53-55℃, and the flow rate of the reflux pump is 20- 22L / h, the hydraulic retention time is 36 hours; the operating temperature of the aerobic circulation bioreactor is 33-35°C, and...

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Abstract

The invention relates to a coupling treatment device and a coupling treatment method for a sweet sorghum fuel ethanol wastewater circumfluence bioreactor. The device comprises a feed pump, a reflux pump, an anaerobic inner circumfluence bioreactor, a sedimentation separation zone, a three-phase separator, an intermediate regulating tank, an aerobic feed pump, an air lift type circumfluence reactor, a solid-liquid separation zone, a precipitator, an air compressor and an air flowmeter, wherein the anaerobic inner circumfluence bioreactor is provided with a cylindrical shell; a cylindrical draft tube and the three-phase separator are arranged in the cylindrical shell; the air lift type circumfluence reactor is provided with a cylindrical shell; a cylindrical draft tube is arranged in the shell; the top part of the shell is provided with the solid-liquid separation zone; and the precipitator is arranged outside the shell. An activated carbon carrier is used to fix high-temperature anaerobic activated sludge and aerobic activated sludge to form a biomembrane for biological treatment of sweet sorghum fuel ethanol wastewater; a coupling system has simple and compact structure, good treatment effect and low energy consumption, and can degrade the sweet sorghum fuel ethanol wastewater without any pretreatment; and after the wastewater is treated by the coupling system, main indexes of the wastewater reach Grade-I wastewater emission standard of national alcohol industry.

Description

technical field [0001] The invention relates to a sweet sorghum fuel ethanol wastewater circulation bioreactor coupling treatment device and method, and belongs to the technical field of wastewater biological treatment in the alcohol industry. Background technique [0002] Fuel ethanol refers to anhydrous ethanol with a volume concentration of more than 99.5%. Fuel ethanol is a clean-burning, high-octane fuel that is a renewable energy source. Fuel ethanol is a kind of renewable energy, which can be used in special ethanol engines, and can be mixed with gasoline in a certain proportion, and can be used directly without any modification to the original gasoline engine. The use of alcohol-containing gasoline can reduce gasoline consumption, increase the oxygen content of fuel, make combustion more complete, and reduce the emission of pollutants such as CO and nitrogen oxides during combustion. [0003] In my country, most fuel ethanol is produced by fermenting grain raw mate...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 闻建平邱春生嘉晓强卢文玉
Owner TIANJIN UNIV
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