An efficient denitrifying and carbon-removing device for culture wastewater anaerobic biogas slurry with a low C/N ratio and a process thereof

Abstract

An efficient denitrifying and carbon-removing device for culture wastewater anaerobic biogas slurry with a low C/N ratio and a process thereof are disclosed. The main part of the device comprises four-stage micro-aerobic aeration tanks. Based on a step-by-step water feeding technique, a micro-aerobic aeration technique and a coagulating sedimentation technique, the process which is capable of synchronously coupling denitrification and carbon removing through step-by-step water feeding and micro-aerobic aeration, self-balanced in carbon source, self-balanced in alkalinity, high in efficiency, low in consumption and capable of reaching standards is constructed. The process includes subjecting livestock culture wastewater to solid liquid separation, feeding the wastewater as a resource into a UASB reactor, producing biogas and the biogas slurry through anaerobic fermentation, feeding the biogas slurry with the low C/N ratio and high nitrogen and phosphorus concentrations into a step-by-step water feeding micro-aerobic aeration system (SFAO4), subjecting the biogas slurry to efficient denitrification and carbon removing, continuously feeding biochemical treatment effluent into a coagulating clarifier, performing deep denitrification and phosphorus removing, and discharging after clear water reaches the standards. The device and the method are advantaged by good denitrification and phosphorus removing effects, high resistance to impact load and a low running cost.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes different methods for treating organically polluted waters such as sewage or manure. These techniques aim at reducing ammonia levels while also increasing carbons sources like urea production. By combining these two steps together, they improve both the performance and durability of the treated systems compared to traditional activated sludges alone. Additionally, this new method allows for efficient integration into existing facilities without adding expensive chemical substances. Overall, this innovative technologies provide better environmental benefits over conventional ways of disposal.

Problems solved by technology

This patented technical problem addressed in the patents relates to improving the management of animal husbandry plants during their growth cycle, particularly when there was insufficient air supply available through exhaust systems like clogging ventilators used in feedstock processing units. Current methods involve reducing NOx levels in effluence streams caused by incomplete combustion of fossils while maintaining effective oxidative decomposition rates. These techniques have limitations because they require expensive chemical agents and consume significant amounts of power resources.

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