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Modified tea tree lignin flocculating agent and preparation method thereof

A flocculant, lignin technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of secondary environmental pollution and degradation difficulties, and reduce production costs. , Improve the dispersion uniformity, enhance the effect of photocatalytic efficiency

Active Publication Date: 2014-11-26
JIANGSU SHANGDA WATER AFFAIR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a modified tea tree quality composite flocculant, which overcomes the problems that most of the current water treatment flocculants are synthetic polymer flocculants, which are difficult to degrade and cause secondary pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prune the branches of a tea tree with a diameter of 0.8-1.0cm from a 1.5-year-old tea tree, remove the leaves, and dry the branches in a closed oven at 55°C at a constant temperature. After the water content is lower than 30%, take them out and crush them to 80-200 eye, spare;

[0035] Take 100 grams of the above-mentioned tea tree pruning powder, add 500ml of deionized water to soak, make it fully absorb water and expand, after soaking for about 0.4 hours, add 50ml of alcohol to the preliminary mixed liquid, continue soaking for 0.5 hours, then pass through the metal Filter through a net to obtain solution A1; in solution A1, add a mixture of citric acid and phosphoric acid with a dropper, the molar ratio of citric acid and phosphoric acid is 1:1, roughly adjust the pH value of the extract of solution A to 4.5, and obtain solution C1;

[0036] Take out the lignin obtained in the filter screen, dry it, and reduce its water content to less than 30%, and obtain material B...

Embodiment 2

[0040] Prune branches of tea trees with a diameter of 0.2-0.5 cm from 3-year-old tea trees, remove the leaves, and dry the branches in a closed oven at 60°C at a constant temperature. After the water content is lower than 30%, take them out and crush them to 80-200 eye, spare;

[0041]Take 100 grams of the above-mentioned tea tree pruning powder, add 400ml of deionized water to soak, make it fully absorb water and expand, after soaking for about 0.3 hours, add 40ml of alcohol to the preliminary mixed liquid, continue soaking for 0.4 hours, then pass through the metal Filter through a net to obtain solution A1; in solution A1, add a mixture of citric acid and phosphoric acid with a dropper, the molar ratio of citric acid and phosphoric acid is 1:1, roughly adjust the pH value of the extract of solution A to 4.5, and obtain solution C1;

[0042] Take out the lignin obtained in the filter screen, dry it, and reduce its water content to less than 30%, and obtain material B1;

[0...

Embodiment 3

[0046] 100 grams of flocculant obtained in implementation example 1 is carried out as follows:

[0047] a. Rural domestic sewage in a certain place in Jiangsu is polluted by heavy metals in mining and metallurgy wastewater, so it needs to be decontaminated. After testing, the heavy metal content of the sewage: After the wastewater is filtered through a grid to remove solids, add alkali to adjust the pH to 8-9, and stir Mix, then filter and remove sediment to obtain rural domestic wastewater after precipitation;

[0048] b. Analyze the total mass of heavy metals in the wastewater after precipitation, add a flocculant with a particle size of 1 times the total mass of heavy metals as 100 mesh flocculant in the wastewater after precipitation, add acid to adjust the pH value to 4.5, stir and mix for 120 minutes to obtain a mixed solution ;

[0049] C. Transfer the mixed solution to the secondary separation tank, add the flocculant at a rate of 0.1 milliliters of flocculant per lit...

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Abstract

The invention discloses a modified tea tree lignin flocculating agent and a preparation method thereof, and belongs to the technical field of sewage treatment. The preparation method breaks a conventional pure polymer synthetic mode for preparing a wastewater flocculating agent, introduces modified tea tree lignin in raw materials for preparing the wastewater flocculating agent to be used as a molecular basic skeleton, increases biodegradability of the conventional flocculating agent, and reduces production cost of the wastewater flocculating agent. The flocculating agent provided by the invention is suitable for various water qualities, and is particularly suitable for instantaneous precipitation of chemical sewage with relatively high content of heavy metals, high-concentration domestic sewage, garbage leachate and backwashing wastewater. The flocculating agent provided by the invention has important environmental, social and economic benefits.

Description

technical field [0001] The invention relates to a modified tea tree quality flocculant and a preparation method thereof, belonging to the technical field of sewage treatment. Background technique [0002] At the turn of spring and summer, after the spring tea leaves the market, many tea farmers often cut off the tea trees, and burn the branches of the tea trees after drying, which wastes a lot of the functions of the tea tree branches in terms of environmental protection. Tea tree branches are used as raw materials, which to a certain extent rediscover the economic and ecological value of tea trees. Tea tree pruning branches are mainly composed of cellulose, hemicellulose and lignin in chemical composition, and are also rich in nutrients such as polysaccharides and amino acids. [0003] At present, most of the organic polymer flocculants used for sewage treatment or their hydrolysis and degradation products are toxic, and the acrylamide monomer used for synthesis is toxic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F9/04
Inventor 徐卫东顾杨丁青松申萍萍孟宪忠
Owner JIANGSU SHANGDA WATER AFFAIR
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