Method for enriching phosphorus by using aerobic granular sludge

An aerobic granular sludge and chemical technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. The effect of denitrification and carbon removal is good, the cost of capital construction is reduced, and the operation is stable.

Active Publication Date: 2013-07-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are patents for cultivating aerobic granular sludge for nitrogen and phosphorus removal, but there is no patent for using aerobic granular sludge to enrich phosphorus from the perspective of phosphorus recovery
Yilmaz, De Kreuk, van Loosdrecht and other literatures all reported the process of chemical phosphorus precipitation in aerobic granular sludge. Angela directly proved it through X-Ray Diffusion (XRD), Raman Spectroscopy and Scanning Electron Microscopy–Energy dispersive spectrum (SEM-EDS). There is chemical phosphorus in aerobic granular sludge, but there is no use of aerobic granular sludge to enrich and recover phosphorus resources from the perspective of phosphorus recovery

Method used

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  • Method for enriching phosphorus by using aerobic granular sludge
  • Method for enriching phosphorus by using aerobic granular sludge
  • Method for enriching phosphorus by using aerobic granular sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this embodiment, a kind of aerobic granular sludge process enriched with chemical phosphorus adopts a sequence batch reactor (SBR) with an aspect ratio of 9, such as figure 1 Shown: The main body of the reactor is composed of plexiglass, the total volume of the reactor is 9L, and the working volume is 7L; the bottom of the reactor is equipped with a microporous aeration head 6, which is connected with an external air compressor 3 by an air pipe 4 for aeration. The flow rate is adjusted by the rotameter 5, the stirring is realized by the stirring paddle 2, the reactor is drained by the solenoid valve 7, and the water is fed by the water inlet pump 1, and the whole process is automatically operated under the control of the time controller 8.

[0051] In this case, the operation process of using the above-mentioned SBR to cultivate an aerobic granular sludge enriched in chemical phosphorus is as follows:

[0052] (1) Inoculate the flocculent sludge at the end of the aer...

Embodiment 2

[0063] Reactor used in the present embodiment is with embodiment 1, and concrete operating process is as follows:

[0064] (1) Inoculate the flocculent sludge at the end of the aeration tank of a sewage treatment plant, inoculate 2.5L into the reactor after sedimentation and concentration, add artificially prepared influent water to the working volume of the reactor at 7L (total of the sequencing batch reactor The volume is 9L), the sludge concentration at this time is maintained at 1000mg / L, the sludge is acclimated by continuous aeration for 24 hours, and then the sludge is settled for 2 hours, and the supernatant is discharged to the outlet of the reactor;

[0065] (2) Ingress of water,

[0066] The influent water quality is artificially distributed, and the quality of the distributed water is: COD is 600mg / L, NH 4 Cl is 115mg / L, KH 2 PO 4 43.9-87.8mg / L, Ca 2+ 60mg / L, Mg 2+ 20-30mg / L, trace elements: FeCl 3 ·6H 2 O is 1.5mg / L, H 3 BO 3 0.15mg / L, CuSO 4 ·5H 2 O is...

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Abstract

The invention belongs to the field of wastewater treatment and phosphorus resource recovery, and relates to a method for enriching phosphorus by using aerobic granular sludge. The method comprises the following steps of: (1) inoculating flocculent sludge which is precipitated and concentrated to a sequencing batch reactor, then introducing water into the sequencing batch reactor, continuously aerating to acclimate the sludge, then precipitating, and discharging supernatant liquid to a water outlet of the reactor; (2) introducing water; (3) aerating; (4) precipitating; (5) draining; (6) idling; and (7) repeating the steps (2) to (6), thereby obtaining high-phosphorus-enriched aerobic granular sludge. The phosphorus-enriched aerobic granular sludge prepared by the method has excellent sedimentation characteristics, the particle diameter and specific gravity of particles are large, and meanwhile, the denitrification and decarburization effects are good, so that the capital construction cost of a sewage treatment plant can be reduced in actual projects, and the process is simple.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and phosphorus resource recovery, and relates to a method for enriching chemical phosphorus by using aerobic granular sludge. Background technique [0002] Phosphorus is an indispensable inorganic nutrient element for the growth of animals and plants, and plays an important role in the composition and metabolism of the protoplasm of organisms. As a non-renewable resource, phosphate rock is becoming more and more scarce, and the cost of mining is getting higher and higher. An article "Environment: The disappearing nutrient" (Environment: The disappearing nutrient, 2009, Nature) published in the journal Nature mentioned that the global total phosphorus reserves can still be used by humans for hundreds of years. But relying on the current mining technology, the phosphate rock that can be economically mined actually only has a usable time of about 50 years! Contradicting with the increasingly ser...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李咏梅邹金特张丽丽孙静
Owner TONGJI UNIV
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