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

A biofilm method and blue iron ore technology, applied in the field of water treatment, can solve the problems of low phosphorus removal efficiency in sewage, high carbon source consumption, and low economic value of recovered products, and achieve the benefits of crystallization purity and carbon source reduction The effect of consuming and increasing economic value

Active Publication Date: 2021-04-16
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

[0008] The purpose of the present invention is to disclose a process for enriching phosphorus and reclaiming blue iron ore by biofilm method, which solves the problems of low efficiency of phosphorus removal in sewage, high consumption of carbon sources and low economic value of recovered products

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

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.

[0031] combine figure 1 As shown, the present invention provides a blue iron ore recovery system 101, comprising an upflow reactor 5, a phosphorus storage device 4 communicated with the upflow reactor 5 and a dosing device 6, and the upflow reactor 5 is A reflux system 53 and a discharge structure 51 are provided, and the phosphorus storage device 4 and the dosing device 6 communicate with the upflow reactor 5 respectively, and the upflow reactor 5 provides a phosphorus-rich solution (the phosphorus concentration is 60mg / L~300mg / ...

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Abstract

The invention provides a process for enriching phosphorus and recovering blue iron ore by using a biofilm method. The process comprises the following steps of 1) an aerobic phosphorus absorption stage, 2) an anaerobic phosphorus release stage, 3) a cyclic enrichment stage, 4) a seed crystal forming stage, and 5) a crystal formation stage. Phosphorus is enriched through a biofilm method, and phosphorus is recycled by taking the blue iron ore as a recycled product, so that the problem of phosphorus removal of municipal sewage is solved, and the economic value is greatly improved by taking the blue iron ore as the recycled product; high-dissolved oxygen is prepared in the aerobic stage, so that a high-concentration phosphorus recovery solution can be obtained with a relatively low carbon-phosphorus ratio and a relatively high enrichment factor, and the consumption of a carbon source is reduced; besides, the oxidation-reduction potential is controlled to be below -100mv in the anaerobic phosphorus release stage of the biofilm method, so that the oxidation-reduction potential does not need to be adjusted in the recovery process of the blue iron ore, the crystallization purity of the blue iron ore is facilitated, and the overall process efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a process for enriching phosphorus and recovering blue iron ore by using a biofilm method. Background technique [0002] The flow of phosphorus in nature is one-way, so it has the dual characteristics of scarcity and pollution at the same time. Based on the current storage and use speed of phosphorus, the storage of phosphorus in the world can only be used by humans for another 100 years. Phosphorus in urban sewage plants will become the main source of phosphorus resource recovery in the future. [0003] The enhanced biological phosphorus removal process (EPBR) used in the existing urban sewage plants mainly removes phosphorus in sewage by discharging excess sludge. The enhanced biological phosphorus removal process has problems such as low recovery efficiency and relatively high cost. [0004] The organisms on the biofilm have the characteristics of long generation ti...

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F3/02C02F3/28C02F9/14C01B25/37C02F101/10
CPCC02F3/308C02F1/5245C02F2001/5218C02F3/006C02F2209/22C02F2209/44C02F2209/04C02F3/1263C01B25/375B01D9/0059B01D9/0036C02F3/04C02F3/1268C02F3/282C02F2305/06Y02W10/10
Inventor 潘杨张星宇黄勇倪敏陈越
Owner SUZHOU UNIV OF SCI & TECH
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