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

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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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.

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