Integrated treating device and method of fuel ethanol distillation wastewater of corn straw and high ammonia nitrogen pretreatment wastewater

A technology for fuel ethanol and corn stalks, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of enhancing impact resistance, reducing impact, and operating flexibility.

Inactive Publication Date: 2011-03-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes two different ways to improve the decomposition or oxidizing activity of microorganisms used in water treatment systems: one uses anaerotic acid hydrophilic colloidal carriers called activated charcoal, while another uses highly porous materials like ceramics fixed onto solid supports such as growing algae. These techniques help control the amount of nutrients released during the activation phase by adjusting factors like flow rates, pressure levels, and residence times. Additionally, these technologies allow for continuous stable operations without interruptions due to changes overrun conditions caused by sedimentation. Overall, this innovative technical results provide improved environmental management capabilities and enhanced operational flexibilities compared to existing conventional approaches.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving efficient use of biofueled fuels like sugarcane or maize residues while minimizing their impacts upon our natural ecosystems due to excessive amounts of fertilizers containing harmful compounds called humitones. Previous methods have had limitations including slow reaction rates caused by long residence times between acidification steps, difficulty separating suspending solid particles into pure fractions during processing, and incomplete reduction of dissolved oxygen levels leading to greenhouse gas emissions. Therefore there is a demand for new technologies to address these issues.

Method used

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  • Integrated treating device and method of fuel ethanol distillation wastewater of corn straw and high ammonia nitrogen pretreatment wastewater
  • Integrated treating device and method of fuel ethanol distillation wastewater of corn straw and high ammonia nitrogen pretreatment wastewater

Examples

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Embodiment 1

[0029] System startup: Connect 50% of the anaerobic activated sludge to the anaerobic fluidized bed reactor, add 10% of the reactor volume to the activated carbon carrier with a particle size of 0.8-1.3mm, the effective volume of the anaerobic reactor is 4L, and the outer shell The diameter is 80mm, the height is 880mm, the diameter of the guide tube is 55mm, and the height is 750mm. Keep the reactor temperature at 53-55°C, dilute 3-5 times the fuel ethanol distillation wastewater intermittently domesticated for 5 days, and then continuously feed water. The hydraulic retention time is 50-55h, and the liquid The upflow rate is 9.0m / h, the COD removal rate of the effluent is higher than 75%, the concentration of the influent is increased, and the activated sludge is enriched by gradient acclimatization. After 25 days of gradient acclimatization, the raw water is directly fed into the water. After 11 days of continuous operation, the immobilization of the biofilm film is completed....

Embodiment 2

[0032] The effective volume of the anaerobic fluidized bed bioreactor is 7L, the diameter of the outer shell is 100mm, the height is 1000mm, the diameter of the guide tube is 75mm, and the height is 800mm; Flow cylinder diameter 70mm, height 900mm; aerated biological filter bed effective volume 4.65L, shell diameter 130mm, height 390mm, guide cylinder diameter 70mm, height 360mm; anaerobic fluidized bed reactor inoculated with 40% anaerobic sludge, Dosing 7% activated carbon particles, inoculating 30% of aerobic sludge in the aerobic ascending loop reactor, adding 4% of activated carbon particles, inoculating 12% of aerobic sludge in the aerated biological filter bed, filling the height of the reactor with 75% of the thickness activated carbon, start the integrated device according to the method in Example 1.

[0033] Corn straw fuel ethanol distillation wastewater COD 24500-25000mg / L, ammonia nitrogen 50.3-55.5mg / L, pH 4.4-4.5; pretreatment wastewater COD 751-783mg / L, ammonia...

Embodiment 3

[0035]The effective volume of the anaerobic fluidized bed bioreactor is 10L, the diameter of the outer shell is 120mm, the height is 1080mm, the diameter of the guide tube is 80mm, and the height is 900mm; Flow cylinder diameter 80mm, height 1000mm; aerated biological filter bed effective volume 7.5L, shell diameter 150mm, height 450mm, diversion cylinder diameter 100mm, height 400mm; anaerobic fluidized bed reactor inoculated with 30% anaerobic sludge, Add 5% activated carbon particles, inoculate aerobic sludge with 20% of aerobic sludge in the aerobic ascending loop reactor, add 3% of activated carbon particles, inoculate 10% of aerobic sludge in the aerated biological filter bed, fill the reactor height with 70% thickness activated carbon, start the integrated device according to the method in Example 1.

[0036] Corn straw fuel ethanol distillation wastewater COD 15000-15500mg / L, ammonia nitrogen 38.1-40.5mg / L, pH 4.6-4.7; pretreatment wastewater COD 652-683mg / L, ammonia n...

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Abstract

The invention relates to an integrated treating device and method of the fuel ethanol distillation wastewater of corn straw and the high ammonia nitrogen pretreatment wastewater. In the device of the invention, the anaerobic fluidized bed reactor is provided with a cylindrical outer shell, a cylindrical guide cylinder and a three-phase separator are arranged in the anaerobic fluidized bed reactor; the airlift circulation flow reactor is provided with a cylindrical outer shell, a cylindrical guide cylinder is arranged in the outer shell, the top of the reactor is provided with a solid-liquid separation area; and the aeration biological filter bed is provided with a cylindrical outer shell, a cylindrical guide cylinder is arranged in the filter bed, and a backwashing pump is arranged outside the filter bed. The integrated treating method comprises the following steps: the high-temperature anaerobic primary treatment of distillation wastewater is performed in the anaerobic fluidized bed reactor, the anaerobic effluent and the high ammonia nitrogen pretreatment wastewater are commonly degraded in the airlift circulation flow reactor, and finally the advanced treatment of the aerobic effluent is performed in the aeration biological filter bed. The integrated system has simple and compact structure and good removal effect of high concentration COD and ammonia nitrogen; and after the distillation wastewater and the pretreatment wastewater are treated by the integrated system, the major indexes of the treated wastewater can satisfy the grade A wastewater discharge standard of the national alcohol industry.

Description

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Claims

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Application Information

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Owner TIANJIN UNIV
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