A method for preparing flocculant from water purification plant sludge and its application in algae removal

A technology of flocculants and water purification plants, which is applied in the field of algae removal by preparing flocculants, which can solve the problems of cumbersome preparation process, long time consumption, and increased treatment costs, and achieve simple preparation process, less dosage of chemicals, The effect of easy operation

Inactive Publication Date: 2018-10-30
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent involves steps such as sludge hydrothermal oxidation, solid-liquid separation, drying, crushing, activation, standing still, adjusting pH and aging, and the preparation process is cumbersome and time-consuming; moreover, hydrogen peroxide, hydrochloric acid, Alkali and other medicines increase the processing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing flocculants using sludge from water purification plants using coal seam water or surface water as a source of water, comprising the following steps:

[0024] (1) Weigh 3 parts of dried and pulverized sludge, mix it with concentrated hydrochloric acid according to the mass: volume ratio of 1: 0.67~2, put it in an airtight container for modification reaction at 100~250°C 1 to 3 hours to obtain modified sludge;

[0025] (2) Take 60 parts by volume of ultrapure water, distilled water or boiled and cooled tap water for 1 to 3 times, add it to a closed container and mix it evenly with the modified sludge, then filter out the sludge residue and collect the filtrate for later use;

[0026] (3) Dilute the collected filtrate to 100 parts by volume with ultrapure water, distilled water or boiled and cooled tap water to obtain a finished flocculant.

Embodiment 2

[0028] In this example, the method of preparing flocculants using sludge from water purification plants using coal seam water or surface water as the water source is different from Example 1 in that in step (1), the process of obtaining dry sludge is as follows: After the sludge in the pool is dehydrated, it is air-dried under natural conditions or dried at 105°C to obtain dried sludge lumps, and then the dried sludge lumps are crushed to a particle size of ≤100 mesh.

Embodiment 3

[0030] This example uses coal seam water or surface water as the method of preparing flocculants from water purification plant sludge. The difference from the previous examples is that the dried sludge is first crushed to a particle size of ≤100 mesh, Then mix it with concentrated hydrochloric acid in a mass:volume ratio of 1:0.67.

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PUM

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Abstract

The invention relates to a method for preparing flocculant from water treatment plant sludge and application of the prepared flocculant to algae removal in water. The water treatment plant sludge with coalbed water or surface water as a water source serves as the raw material in the method for preparing the flocculant. Three parts of sludge which is dried and smashed are weighed and mixed with concentrated hydrochloric acid according to the volume ratio of 1:(0.67-2), the mixture is placed in a sealed container for modification reaction, and modified sludge is obtained; 60 parts of ultra-pure water or distilled water or cooled boiled tap water are added into the sealed container by volume to be evenly mixed with the modified sludge, then sludge residues are filtered out, and filter liquid is collected for use; the collected filter liquid is determined to 100 parts by weight by means of ultra-pure water or distilled water or cooled boiled tap water, and the flocculant finished product is prepared. The flocculant obtained through the method is used for algae removal in water, is small in consumption, quick in speed, thorough in algae removal and convenient to operate and provides a new means for resource utilization of water treatment plant sludge.

Description

technical field [0001] The invention relates to a method for preparing a flocculant, in particular to a method for preparing a flocculant by using coal seam water or surface water as a water source from water purification plant sludge, and the application of the prepared flocculant in algae removal. Background technique [0002] Cyanobacteria blooms have become a global problem that seriously affects the quality of the water environment. Microcystis is an important dominant group. In natural water bodies, when Microcystis blooms break out, a large number of Microcystis float on the surface of the water body in a group state, resulting in The drinking value, landscape value, and ecological service function of water body decline. Studies have shown that 80% of the outbreaks of cyanobacteria blooms produce toxins, and these toxins can not only enter drinking water sources directly to endanger human health, but also can be enriched in aquatic animals such as aquatic products thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/52
Inventor 王红强吴世超方晓敏张安娜雷相朴田长勋陈松涛毛艳丽郭一飞
Owner HENAN UNIV OF URBAN CONSTR
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