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Method for quickly, efficiently and synchronously recycling phosphorus in source separation urine and septic tank anaerobic supernatant

A supernatant and source separation technology, which is applied in the field of environmental technology and agricultural resource utilization, can solve the problems of increasing phosphorus recovery costs, and achieve the effects of reducing phosphorus resource waste, reducing environmental pollution, and high economic benefits

Inactive Publication Date: 2016-11-23
UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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Problems solved by technology

At present, the main source of magnesium in the process of recovering phosphorus in wastewater by struvite method is MgCl. 2 , MgO, seawater and brine, etc., which virtually increases the cost of phosphorus recovery

Method used

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  • Method for quickly, efficiently and synchronously recycling phosphorus in source separation urine and septic tank anaerobic supernatant
  • Method for quickly, efficiently and synchronously recycling phosphorus in source separation urine and septic tank anaerobic supernatant
  • Method for quickly, efficiently and synchronously recycling phosphorus in source separation urine and septic tank anaerobic supernatant

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Embodiment Construction

[0016] With the acceleration of my country's urbanization process, the environmental pollution caused by urbanization has become increasingly prominent. The arbitrary discharge of domestic sewage caused by the undeveloped sewage pipe network in villages and towns has caused serious water pollution. In view of the above situation, the present invention combines the current actual situation and the characteristics of sewage from public toilets in villages and towns to invent a method for fast, efficient and synchronous recovery of phosphorus in urine and anaerobic supernatant of septic tanks. The principle is that within a certain pH range (8.4-8.6), when PO in struvite stock solution 4 3- -P, NH 4 + -N and Mg 2+ The ion product is greater than the solubility K of struvite SO When , that is, the solution supersaturation Ω>1, the three ions will combine and deposit in the form of precipitation. The present invention realizes source separation by controlling the pH of the re...

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Abstract

The invention relates to a method for quickly and efficiently synchronously recovering sources to separate urine and phosphorus in the anaerobic supernatant of septic tanks, which is characterized in that the method is carried out according to the following steps: 1. Transforming the sewage pipeline of a traditional flushing urinal ; 2. Use the urine source separation controller to realize the separation and collection of urine and flushing water; 3. Perform anaerobic fermentation on the septic tank sewage, and then filter the supernatant through double-layer grids; 4. Distill the supernatant After the liquid and stored urine are filtered through a fine sand column, they are mixed according to a certain ratio, so that the pH of the mixed solution is in the range of 8.4 to 8.6, and the off-white precipitate rich in struvite is recovered; 5. Use infrared diffraction spectroscopy and chemical methods to identify the Struvite purity. By strictly controlling parameters such as pH value and stirring speed of wastewater, the invention can not only recover phosphorus in urine and septic tank wastewater synchronously, reduce environmental pollution, reduce wastewater treatment cost, but also obtain high-purity struvite crystals. The invention has the advantages of low cost, simple process, high efficiency and rapidity.

Description

technical field [0001] The invention relates to an automatic controller for urine source separation to realize the automatic separation and collection of urine source, and combined with the physical and chemical properties of the anaerobic supernatant of septic tank wastewater, the urine and the supernatant are used as struvite reaction stock solution A method for preparing high-purity struvite belongs to the field of environmental technology and agricultural resource utilization. Background technique [0002] With the acceleration of the process of urbanization in our country, a series of environmental problems have become increasingly prominent. The lack of sewage pipe networks in villages and towns has led people to discharge domestic sewage, especially toilet sewage, directly into local rivers and lakes, which not only caused the loss of a large amount of phosphorus resources, but also caused serious water pollution due to high concentrations of nitrogen and phosphorus. ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 胡正义温国期王国曦刘小宁臧海兴张向茹
Owner UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
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