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Biomass phosphorus-locking agent and method for in-situ removal of phosphorus from polluted water body sediment

A technology of biomass and phosphorus-locking agent, applied in biological sludge treatment, sludge treatment, water pollutants, etc., can solve the problem of removing phosphorus in water body sediment, and achieve the effect of high-efficiency in-situ removal of phosphorus in sediment

Active Publication Date: 2022-03-25
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not fundamentally remove the phosphorus in the sediment of the water body, and the phosphorus in the sediment of the water body will still be slowly released into the water body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A biomass phosphorus-locking agent comprises: dewatered sludge, rice husk powder, organic meal waste, clinker and shell powder. Its preparation method comprises the following steps:

[0024] (1) Preparation of fermented sludge: dehydrated sludge, clinker, organic meal waste and rice husk powder were mixed according to the mass ratio of 1:1:1:1.5 and naturally fermented for 1.5 months, and stirred and mixed every 12 hours for 1 times, get fermented sludge;

[0025] (2) Preparation of biomass phosphorus-locking agent: fermented sludge and shell powder are mixed at a mass ratio of 2:1, placed in a sealed tank for carbonization, and the temperature is raised from room temperature to 400 °C at a heating rate of 3 °C / min. Then pyrolyze at 400°C for 34 hours, and then cool to room temperature to obtain a biomass phosphorus-locking agent.

[0026] A method for in-situ removal of phosphorus from polluted water body sediment by using a biomass phosphorus-locking agent, specific...

Embodiment 2

[0028] A biomass phosphorus-locking agent comprises: dewatered sludge, corn stalk powder, organic meal waste, clinker and shell powder. Its preparation method comprises the following steps:

[0029] (1) Preparation of fermented sludge: dehydrated sludge, clinker, organic meal waste and corn stalk powder were mixed according to the mass ratio of 1:1:1:2 and naturally fermented for 2 months, and stirred and mixed every 14 hours for 1 times, get fermented sludge;

[0030] (2) Preparation of biomass phosphorus-locking agent: fermented sludge and shell powder are mixed in a mass ratio of 3:1 and then placed in a sealed tank for carbonization. The temperature is raised from room temperature to 420 °C at a heating rate of 5 °C / min. Then pyrolyze at 420° C. for 3 hours, and then cool to room temperature to obtain a biomass phosphorus-locking agent.

[0031] A method for in-situ removal of phosphorus from polluted water body sediment by using a biomass phosphorus-locking agent, speci...

Embodiment 3

[0033] A biomass phosphorus-locking agent comprises: dewatered sludge, sawdust powder, organic meal waste, clinker and shell powder. Its preparation method comprises the following steps:

[0034](1) Preparation of fermented sludge: dehydrated sludge, clinker, organic meal waste and sawdust powder are mixed in a mass ratio of 1:1:1:1 and naturally fermented for 1 month, and stirred once every 12 hours , get fermented sludge;

[0035] (2) Preparation of biomass phosphorus-locking agent: fermented sludge and shell powder are mixed at a mass ratio of 1:1, placed in a sealed tank for carbonization, and the temperature is raised from room temperature to 380°C at a heating rate of 2°C / min. Then pyrolyze at 380° C. for 5 hours, and then cool to room temperature to obtain a biomass phosphorus-locking agent.

[0036] A method for in-situ removal of phosphorus from sediments in polluted water bodies by utilizing a biomass phosphorus-locking agent, specifically: mixing the biomass phosp...

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Abstract

The invention relates to the technical field of sewage treatment, and discloses a biomass phosphorus-locking agent and a method for in-situ removal of phosphorus from polluted water body sediment. The biomass phosphorus-locking agent includes: dewatered sludge, plant fiber powder, organic meal waste, clinker and shell powder. Mixing it with the bottom mud near the root system of Hydra algae has a good effect on removing phosphorus from the bottom mud of polluted water bodies. The invention adopts fermented sludge and shell powder to prepare biomass phosphorus-locking agent, and combines with large-scale submerged plants to provide an in-situ phosphorus removal method of polluted water bottom mud. The biomass phosphorus locking agent can not only effectively control the release of phosphorus into the water body, but also convert part of the solid phosphorus in the sediment into phosphorus that can be absorbed by plants, and can provide plants with nitrogen, mineral elements and other nutrients, effectively combining chemical locks The advantages of phosphorus method and plant absorption can achieve the purpose of efficient in-situ removal of sediment phosphorus.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biomass phosphorus-locking agent and a method for in-situ removal of phosphorus from polluted water bottom sludge. Background technique [0002] Eutrophication of lakes and reservoirs is a hot environmental issue of global concern. A large number of studies have found that phosphorus is one of the important nutrient sources that cause eutrophication of water bodies. Due to the long-term input of exogenous pollution, the sediment of eutrophic water body has become a phosphorus pool, which directly affects the phosphorus content of water body as endogenous phosphorus. At present, the in-situ control methods of endogenous phosphorus in sediment include physical covering method, chemical phosphorus locking method and plant absorption method. Both physical and chemical methods keep phosphorus in the sediment, and it will still be released to the water body under long-term ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C02F101/10
CPCC02F11/00C02F11/02C02F2101/105
Inventor 冯丽娟骆玉琴阳广凤穆军
Owner ZHEJIANG OCEAN UNIV
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