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Carbon-based slow-release phosphorus absorption coagulant for farmland ditch water treatment and preparation method thereof

A technology for water treatment and coagulant, which is applied in the field of agricultural non-point source pollution, can solve the problems of uncertainty of discharge route and pollutant discharge, large variation of pollution load over time, etc., achieving obvious coagulation effect and reducing subsequent treatment. Excellent effect of load and total strength

Inactive Publication Date: 2019-10-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because non-point source pollution is mainly dominated by the influence of the hydrological cycle process, and rainfall runoff is random, the resulting non-point source pollution must be random; (2) The discharge route and pollutant discharge are uncertain, which affects non-point source pollution The factors involved are complex and diverse, so the resulting discharge pathways and pollutant discharges have great uncertainty; (3) Spatial-temporal differences, temporal changes in pollution load (rainfall runoff process, different seasons within a year, and inter-annual) and spatial ( different locations) vary widely

Method used

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  • Carbon-based slow-release phosphorus absorption coagulant for farmland ditch water treatment and preparation method thereof
  • Carbon-based slow-release phosphorus absorption coagulant for farmland ditch water treatment and preparation method thereof
  • Carbon-based slow-release phosphorus absorption coagulant for farmland ditch water treatment and preparation method thereof

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Effect test

Embodiment 1

[0024] In this embodiment, the preparation method of carbon-based slow-release phosphorus-absorbing coagulant for farmland ditch water treatment, the specific steps are as follows:

[0025] (1) Grind the straw biochar through a 300-mesh sieve, grind the sliced ​​paraffin, and then mix the two with aluminum sulfate and polyacrylamide, wherein the sliced ​​paraffin, aluminum sulfate, polyacrylamide and straw biochar The mixing mass ratio is 1:10:1:10.

[0026] (2) Put the mixed material into a mould, and then use a tablet machine to press at 40MP for 10 minutes to form it.

[0027] (3) Put the pressed and molded material into an oven, bake at 105° C., and then cool and mold to obtain a carbon-based slow-release phosphorus-absorbing coagulant.

Embodiment 2

[0029] In this embodiment, the preparation method of carbon-based slow-release phosphorus-absorbing coagulant for farmland ditch water treatment, the specific steps are as follows:

[0030] (1) Grind the straw biochar through a 300-mesh sieve, grind the sliced ​​paraffin, and then mix the two with aluminum sulfate and polyacrylamide, wherein the sliced ​​paraffin, aluminum sulfate, polyacrylamide and straw biochar The mixing mass ratio is 1:10:1:10.

[0031] (2) Put the mixed material into a mould, and then use a tablet machine to press at 40MP for 10 minutes to form it.

[0032] (3) Put the pressed and formed material into an oven, bake at 110° C., and then cool and form to obtain a carbon-based slow-release phosphorus-absorbing coagulant.

Embodiment 3

[0034] In this embodiment, the preparation method of carbon-based slow-release phosphorus-absorbing coagulant for farmland ditch water treatment, the specific steps are as follows:

[0035] (1) Grind the straw biochar through a 300-mesh sieve, grind the sliced ​​paraffin, and then mix the two with aluminum sulfate and polyacrylamide, wherein the sliced ​​paraffin, aluminum sulfate, polyacrylamide and straw biochar The mixing mass ratio is 1:10:1:20.

[0036] (2) Put the mixed material into a mould, and then use a tablet machine to press at 40MP for 10 minutes to form it.

[0037] (3) Put the pressed and molded material into an oven, bake at 105° C., and then cool and mold to obtain a carbon-based slow-release phosphorus-absorbing coagulant.

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Abstract

The invention discloses a carbon-based slow-release phosphorus absorption coagulant for farmland ditch water treatment and a preparation method thereof. The preparation method comprises the followingsteps that sliced paraffin, aluminum sulfate, polyacrylamide and straw biochar are uniformly mixed, the mixture is pressed, molded, baked, cooled and molded to obtain the carbon-based slow-release phosphorus absorption coagulant. The overall strength is excellent, coagulation effect is obvious, a carbon source can further be provided, and the carbon-based slow-release phosphorus absorption coagulant has good effect on subsequent low carbon nitrogen wastewater treatment of ditch drainage. The problem of difficult pretreatment of farmland drainage is solved, the subsequent treatment load of ditch drainage is reduced, and the treatment effect of whole ecological ditches is improved.

Description

technical field [0001] The invention relates to the field of agricultural non-point source pollution, and relates to a technical method for subsequent treatment of farmland drainage. Background technique [0002] According to the survey in 2007, more than 40% of my country's main water pollutant discharge comes from agricultural non-point source pollution, and its chemical oxygen demand (COD) discharge is 13.2409 million tons, accounting for 43.7% of COD discharge. Agricultural non-point source pollution is also the main source of total nitrogen and total phosphorus emissions, with emissions of 2,704,600 tons and 284,700 tons, accounting for 57.2% and 67.4% of the total emissions, respectively. The data show that the sewage discharged from agricultural production brings a huge pollution load to the receiving water body, which seriously causes the eutrophication of the water body. Agricultural non-point source pollution is pollutants such as nutrients, pesticides, heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/28C02F1/56C02F101/10C02F101/30
CPCC02F1/283C02F1/288C02F1/52C02F1/5236C02F1/56C02F2101/105C02F2101/30C02F2103/007
Inventor 梁新强晋迎兵李发永金俊伟赵子熠刘枫
Owner ZHEJIANG UNIV
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