Method for recovering phosphorus from domestic sewage biological treatment system and directly recycling phosphorus

A technology for biological treatment and domestic sewage, applied in the direction of adsorption water/sewage treatment, bio-organic part treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, poor economic benefit, low degree of industrialization, etc., to achieve Increase added value, reduce pollution, and promote plant growth

Pending Publication Date: 2022-08-02
JILIN AGRICULTURAL UNIV
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  • Description
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Problems solved by technology

However, due to the low industrialization degree of comprehensive utilization of straw, poor economic benefits, and high cost, straw in my country is mainly used for direct combustion or incineration.

Method used

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  • Method for recovering phosphorus from domestic sewage biological treatment system and directly recycling phosphorus
  • Method for recovering phosphorus from domestic sewage biological treatment system and directly recycling phosphorus
  • Method for recovering phosphorus from domestic sewage biological treatment system and directly recycling phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: This example uses agricultural waste straws as raw materials to prepare phosphorus-rich biomass charcoal materials, according to the following steps:

[0031] (1) Pretreatment of agricultural waste corn stalks

[0032] Wash the corn stalks with water, put them into a drying box and dry at 120°C, and sieve them to 6-8 mm after crushing to obtain corn stalks;

[0033] (2) Preparation of zinc chloride modified corn stover

[0034] (3) Weighing step (1) Weigh an appropriate amount of sieved corn stalk, add 100 ml of zinc chloride solution with a concentration of 50 g / L, and the immersion ratio is 1.0:1. After immersing for 8 hours, wash it with deionized water. Put it in a drying oven to dry at 120°C.

[0035] (3) Preparation of modified corn stover biochar

[0036] Put the zinc chloride-modified corn stalk charcoal obtained in step (2) into a crucible, put it into a muffle furnace for carbonization, the carbonization temperature is 400 ° C, and the carbonizat...

Embodiment 2

[0040] Embodiment 2: the difference between this embodiment and implementation 1 is: the concentration of zinc chloride solution 40g / L, 50g / L, 60g / L or 70g / L.

Embodiment 3

[0041] Embodiment 3: This embodiment differs from Embodiment 1 in that the impregnation ratio is 0.9:1, 0.8:1, 1.1:1 or 1.2:1.

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Abstract

The invention discloses a method for recovering phosphorus from a domestic sewage biological treatment system and directly recycling phosphorus, and belongs to the technical field of domestic sewage recycling. The method comprises the following steps: by taking agricultural and forestry wastes as raw materials, cleaning the agricultural and forestry wastes, drying, crushing, sieving, impregnating and modifying, and carbonizing at high temperature to form a biomass charcoal material with high adsorption performance on phosphorus, then adding the biomass charcoal material into an urban domestic sewage biological treatment system to form a phosphorus-rich biomass charcoal material, and mixing the material with soil without any retreatment, so that the phosphorus-rich biomass charcoal material has the advantages of high adsorption performance and low cost. The fertilizer can improve soil fertility and promote plant growth. According to the method, phosphorus can be recycled from domestic sewage and directly applied to soil, the trend of increasing shortage of phosphorus resources can be slowed down, meanwhile, forestry and agricultural residues are turned into wealth, sustainable recycling is achieved, cost is low, pollution is avoided, pollution caused by incineration of the forestry and agricultural residues such as straw is avoided, the utilization value of the forestry and agricultural residues is increased, and the method is suitable for industrial production. Wide application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of domestic sewage recycling, and also belongs to the technical field of agricultural and forestry solid waste recycling technology, and in particular relates to a method for recovering phosphorus from a biological treatment system of domestic sewage, and the direct recycling of products obtained by recycling phosphorus. method. Background technique [0002] Phosphorus (P) is one of the very important and difficult to regenerate non-metallic mineral resources on the earth. It is a necessary nutrient element for the growth and reproduction of all organisms, but it is also a limited and non-renewable resource. Although my country's current phosphate rock reserves are 3.3 billion tons, ranking second in the world, the proportion of high-grade phosphate rock resources in my country is relatively low, and the annual mining volume is large. High-quality phosphate rock will be depleted in less than 20 years. The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20C02F1/281C02F2101/105Y02W30/40
Inventor 赵玉鑫于合龙蒋宝军郝晓磊陈桂芬赵曼颖李淑于俊洪
Owner JILIN AGRICULTURAL UNIV
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