Method for phosphorus enrichment and struvite recovery by sludge anaerobic fermentation broth synergistic biofilm process

CN119219191APending Publication Date: 2024-12-31SUZHOU UNIV OF SCI & TECH
View PDF 5 Cites 3 Cited by

Patent Information

Application Number
CN202411388998.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-08
Publication Date
2024-12-31

AI Technical Summary

Technical Problem

The release of nitrogen and phosphorus in the anaerobic fermentation broth of existing sludge leads to an increase in the load of nitrogen and phosphorus in subsequent biological treatment units, and the phosphorus recovery efficiency of the existing struvite crystallization method is not high, the process is complicated, and the carbon source cost is high.

Method used

The synergistic method of sludge anaerobic fermentation broth and biofilm enrichment broth is adopted. Through multiple aerobic/anaerobic alternating operation and magnesium salt addition, the ammonium magnesium phosphate crystals are directly formed in the anaerobic fermentation broth to achieve nitrogen and phosphorus The synchronous removal and recovery of the removal of anaerobic fermentation broth is used as a clean carbon source for biofilm phosphorus enrichment process.

Benefits of technology

The synchronous recovery of nitrogen and phosphorus is achieved, the process flow is shortened, the phosphorus recovery efficiency is improved, the carbon source cost is reduced, and the nitrogen and phosphorus loads in the biofilm reactor are avoided.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119219191A_ABST
    Figure CN119219191A_ABST
Patent Text Reader

Abstract

The invention provides a method for phosphorus enrichment and struvite recovery through cooperation of sludge anaerobic fermentation liquor and a biofilm process, and the method comprises the following steps: supplementing phosphorus enriched based on the biofilm process into the sludge anaerobic fermentation liquor as a phosphorus source; phosphorus in the recovery liquid is enriched through a biofilm method, synchronous removal and recovery of nitrogen and phosphorus in the sludge anaerobic fermentation liquid are achieved through a struvite crystallization one-step method, the technological process is shortened, and meanwhile the recovery efficiency of phosphorus in the anaerobic fermentation liquid and biofilm phosphorus enrichment liquid is improved. Meanwhile, the sludge anaerobic fermentation liquor is rich in volatile fatty acid and can be used as a high-quality carbon source to be applied to anaerobic phosphorus release of the biological membrane, so that the filtrate obtained after nitrogen and phosphorus are removed from the sludge anaerobic fermentation liquor is recycled as a clean carbon source in an anaerobic stage in a biological membrane phosphorus enrichment process to be recycled and applied; therefore, the carbon source cost of a biofilm process phosphorus enrichment process can be greatly reduced, and the increase of nitrogen and phosphorus loads in a biofilm reactor cannot be caused.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Biological phosphorus accumulating and phosphorus recycling method for treating phosphorus-containing liquid waste

    CN102503035A

  • Method for regulating acidogenic effect of liquid state fermentation of sludge and removing nitrogen and phosphorus on line

    CN107162314A

  • Variable-volume operation method applied to phosphorus recovery process by biofilm method

    CN112645448A

  • Process for enriching phosphorus and recovering blue iron ore by using biofilm method

    CN112661266A

  • Method and unit for recovering phosphorous in sewage sludge effluent

    WO2020156978A1

Cited By

  • Method and system for treating biogas slurry through electrochemical membrane ammonia stripping

    CN120157280A

  • Device and method for realizing efficient recovery of phosphorus and PHAs by fermenting aerobic phosphorus removal granular sludge

    CN120247238A

  • Device and method for extracting high-carbon-nitrogen-ratio fermentation liquor by strengthening organic waste fermentation

    CN120286479A