High-concentration ammonia water recovery system based on anaerobic fermentation and composite membrane distillation

By combining anaerobic fermentation and composite membrane distillation technology in wastewater treatment, the problems of high energy consumption, high cost and low concentration of ammonia water recovery in the prior art have been solved, and efficient ammonia nitrogen recovery and carbon neutrality goals have been achieved.

CN119707153APending Publication Date: 2025-03-28STATE GRID HUBEI ELECTRIC POWER RES INST
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Patent Information

Application Number
CN202411838281.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art has problems of high energy consumption, high cost and low recovery concentration when recycling high concentrations of ammonia from wastewater, making it difficult to effectively reduce the carbon footprint and achieve efficient utilization of resources.

Method used

A high-concentration ammonia water recovery system based on anaerobic fermentation and composite membrane distillation is adopted to treat agricultural organic wastewater through anaerobic fermentation, and combined with a composite membrane distillation system with direct contact membrane distillation and reduced pressure membrane distillation, the efficient recovery of ammonia nitrogen is achieved.

Benefits of technology

It effectively reduces water recovery, increases the recovery concentration of ammonia nitrogen, reduces energy consumption and costs, and achieves efficient resource utilization and carbon neutrality goals.

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Abstract

The invention relates to a high-concentration ammonia water recovery system based on anaerobic fermentation and composite membrane distillation, which comprises an anaerobic fermentation device, the anaerobic fermentation device is used for carrying out anaerobic fermentation on nitrogen-rich biomass, conveying the obtained preliminary biogas slurry to a solid-liquid separation device, conveying the biogas to a biogas storage tank, and conveying the biogas to a composite membrane distillation device; the solid-liquid separation device is used for carrying out solid-liquid separation on the primary biogas slurry, the separated biogas slurry is conveyed to the biogas slurry circulation tank, and an outlet of the biogas slurry circulation tank is heated by a biogas slurry heater under the action of a second biogas slurry pump and then is conveyed to an inlet of a first channel of the composite membrane distillation device; the composite membrane distillation system is provided with three flow channels from the feeding side to the permeation side, the vacuum pump is used for providing vacuum for the permeation side of the composite membrane distillation so as to provide conditions for vacuum membrane distillation of the permeation side, and the vacuum membrane distillation device on the feeding side is combined to form the composite membrane distillation device. According to the invention, water recovery can be effectively reduced, and the ammonia nitrogen recovery efficiency is greatly improved.
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