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Porous material capable of removing total phosphorus in wastewater and preparation method of porous material

A porous material and wastewater technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problems of complex operating conditions, large consumption of chemicals, and high operating costs, and achieve good chemical stability and use. Simple method and long service life

Inactive Publication Date: 2015-04-01
格丰科技材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009]This method has a low total phosphorus removal rate and is suitable for treating low-concentration total phosphorus (generally less than 50mg / L) wastewater, which needs to be carried out under anaerobic-aerobic conditions. The operating conditions are more complicated, and sludge needs to be discharged regularly (sludge age is about 7 days), which has a certain removal effect on organic matter
[0010]The above two methods have their own advantages and disadvantages, and both have certain limitations when used
For wastewater with high organic matter concentration (COD1000~5000mg / L) and high phosphorus (TP100~500mg / L), using chemical methods alone requires a large amount of chemicals and high operating costs, making it difficult to meet the removal requirements for organic matter; using biological methods alone is difficult to achieve Total phosphorus and organic matter removal requirements, the effect is not good

Method used

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  • Porous material capable of removing total phosphorus in wastewater and preparation method of porous material
  • Porous material capable of removing total phosphorus in wastewater and preparation method of porous material
  • Porous material capable of removing total phosphorus in wastewater and preparation method of porous material

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Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of a porous material applied to the removal of total phosphorus in wastewater comprises the following steps:

[0032] Preparation of porous material matrix: Weigh 5 kg of alumina, 1 kg of potassium feldspar, 50 kg of bentonite, 2 kg of quartz powder, 0.5 kg of calcite, 0.5 kg of talcum powder, and 2.5 kg of graphite powder, add water, balls, and dispersant , the dispersant is sodium tripolyphosphate, and their ratio is material: water: ball: dispersant = 1: 0.8: 2: 0.003, and then they are put into the ball mill tank together for 18 hours; Mesh sieve, pour it into a stainless steel tray, and then put it into an oven for drying; shape the dried mud powder into a ball through an extruder, put the ball into an oven for drying, and dry the water below 0.8%, and finally use it electric furnace firing;

Embodiment 2

[0034] Preparation of porous material matrix: Weigh and take 1 kg of CaO, 1 kg of alumina, 3 kg of potassium feldspar, 5 kg of bentonite, 3 kg of quartz powder, 1.5 kg of calcite, and 3.5 kg of graphite powder, then add water and balls, Their ratio is material: water: ball = 1:0.8:2, put them together into the ball mill tank for ball milling for 18 hours; pass the ball milled slurry through a 300-mesh screen, pour it into a stainless steel plate, and then put it into the oven together Carry out drying; the dried mud powder is rolled into balls by machinery, put the balls in an oven to dry, the dry moisture is less than 0.8%, and finally fired in an electric furnace. Thus, porous materials are synthesized. The specific surface of the porous material is 220m 2 / g, with an average pore size of 25nm.

[0035] The influent water of this project is the tail water discharged from a sewage treatment plant.

[0036] sewage type pH COD cr BOD 5 SS TP NH 3 -N ...

Embodiment 3

[0041] With embodiment 1, embodiment 2 and embodiment 2 materials are connected in sequence such as figure 1 , the filling quality of each material is 157g, 145g, 156g respectively, and it is filtered at a flow rate of 8ml / min. After filtering 500ml of tail water, 50ml is sampled to detect NH 3 -N and TP, experimental setup, the results are shown in Table 3.

[0042] Table 3 Results of optimized combined phosphorus and ammonia nitrogen removal

[0043]

[0044] For Table 3 filtered water volume and TP and NH 3 -N, make a change curve, as attached figure 2 shown, from figure 2 It can be seen that under this optimized combination, the removal of total phosphorus and ammonia nitrogen in the tail water is very good. When the permeate volume reaches 20L, the concentrations of total phosphorus and ammonia nitrogen are 0.078mg / L and 0.010mg / L, respectively. It is far lower than the requirements for Class IV water bodies in the "Surface Water Environmental Quality Standard"...

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Abstract

The invention relates to the technical field of environmental protection and particularly relates to a porous material capable of removing total phosphorus in wastewater and a preparation method of the porous material. The porous material comprises porous material matrixes having controllable pore diameters, wherein each porous material matrix is prepared by mixing a mixture of metal oxides, an inorganic material and an organic material, milling, molding, drying and sintering processes. By the characteristics that the porous material has high selectivity and high adsorption efficiency to total phosphorus, good chemical stability, high mechanical strength, simplicity in application method and long service life and can be directly paved inside a filtration tank or filled inside a filtration tower column, the porous material can be widely used in industrial wastewater treatment, mining and smelting, electroplating, electronics production, dyeing and garment industry, and can also be used in urban sewage, rivers, lakes and other groundwater management, especially in deep treatment of wastewater containing low concentration of total phosphorus, so that the content of total phosphorus in the treated water can be reduced to 0.05mg / L which is superior to the Class IV water body standard requirements in the national 'Surface Water Environmental Quality Standard' (GB3838-2002).

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a porous material for removing total phosphorus in waste water and a preparation method thereof. technical background [0002] The process of industrialization in the world has produced a large amount of industrial, agricultural, fishery and domestic liquid wastewater containing organic and inorganic phosphorus. The commonly used biochemical treatment is difficult to reduce the total phosphorus to the current surface water discharge standard stipulated by the state. Deep deepening treatment and precipitants are often used to further reduce total phosphorus in water, but the effect is limited. [0003] Currently, wastewater phosphorus removal technologies generally include two types: [0004] 1) Chemical phosphorus removal method: make phosphorus become insoluble solid precipitate and separate it from wastewater; [0005] 2) Biological phosphorus re...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/26B01J20/28B01J20/30C02F1/28C02F1/58
CPCB01J20/28054B01J20/04B01J20/041B01J20/08B01J20/103B01J20/12B01J20/20B01J20/28004B01J20/28057B01J20/28078C02F1/288
Inventor 奉向东
Owner 格丰科技材料有限公司
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