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Composite sewage treatment agent and preparation method and application thereof

A technology of sewage treatment agent and composite microorganism, which is applied in the field of composite sewage treatment agent and its preparation, can solve the problems of high power consumption, water consumption, poor effect, etc., and achieve good photocatalytic sterilization and increase the effect of specific surface area

Active Publication Date: 2021-03-12
纳琦绿能工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, physical methods can only remove conventional suspended solids and substances that are easily adsorbed in sewage, but are helpless for chemical pollutants and microbial pollutants dissolved in sewage
Biological method is a method of using the metabolism of microorganisms in wastewater to decompose degradable organic matter in water, because it has the characteristics of large processing capacity, low investment, and economical reliability, but in the existing sewage treatment process, it is often necessary to divert clean water to carry out Engineering measures such as dilution and artificial aeration; however, some of these methods and measures consume a lot of water and electricity, and some of them have their own shortcomings.
The most widely used methods in the prior art are chemical and physical chemical methods, which can remove most of the suspended solids, oil and biochemical organic pollutants in sewage, but generally the processes used require the use of a large amount of catalysts, oxidants or disinfectants, etc. , there are many disadvantages in terms of economy, operation or reliability

Method used

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  • Composite sewage treatment agent and preparation method and application thereof
  • Composite sewage treatment agent and preparation method and application thereof
  • Composite sewage treatment agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 composite sewage treatment agent

[0045] The preparation method comprises the following steps:

[0046] S1. Preparation of chitosan dithiocarbamate: Dissolve 100g chitosan in 200mL 1wt% acetic acid solution, add 5g NaOH solid, stir well, control the temperature not higher than 5°C, add 75g CS 2 , control the reaction temperature not higher than 40°C, after the dropwise addition, raise the temperature to 45°C and stir for 2h, stop the reaction, add an equal volume of ethanol, filter, and freeze-dry to obtain chitosan dithiocarbamate;

[0047] The obtained dithiocarbamic acid chitosan is carried out infrared detection, in its infrared spectrogram, 3420-3437cm -1 The broad peak at 2875cm is a multiple absorption peak formed by the overlapping of chitosan O—H stretching vibration and N—H stretching vibration absorption. -1 is methylene—CH 2 - stretching vibration peak at 1185cm -1 It is the stretching vibration peak of C=S in NH-C=S, at 1157 and 1072cm -1...

Embodiment 2

[0056] Embodiment 2 composite sewage treatment agent

[0057] The preparation method comprises the following steps:

[0058] S1. Preparation of chitosan dithiocarbamate: Dissolve 100g chitosan in 200mL 3wt% acetic acid solution, add 10g KOH solid, stir evenly, control the temperature not higher than 5°C, add 92g CS dropwise 2 , control the reaction temperature not to be higher than 40°C, after the dropwise addition, raise the temperature to 65°C and stir for 4h, stop the reaction, add an equal volume of ethanol, filter, and freeze-dry to obtain chitosan dithiocarbamate;

[0059] S2. Preparation of magnetic thick-walled porous titanium dioxide hollow spheres: 100g of tetrapentyl titanate and 5g of titanate coupling agent TMC-27 were dissolved in 200mL of dichloromethane to obtain an oil phase; 30g of ferrous chloride, Dissolve 25g of cobalt chloride, 20g of sodium dodecylsulfonate and 10g of porogen in 70mL of water to obtain a water phase; add the water phase dropwise to the ...

Embodiment 3

[0067] Embodiment 3 composite sewage treatment agent

[0068] The preparation method comprises the following steps:

[0069] S1. Preparation of chitosan dithiocarbamate: Dissolve 100g of chitosan in 200mL of 2wt% acetic acid solution, add 7g of NaOH solid, stir well, control the temperature not higher than 5°C, add 84g of CS 2 , control the reaction temperature not to be higher than 40°C, after the dropwise addition, raise the temperature to 55°C and stir for 3h, stop the reaction, add an equal volume of ethanol, filter, and freeze-dry to obtain chitosan dithiocarbamate;

[0070] S2. Preparation of magnetic thick-walled porous titanium dioxide hollow spheres: 100g of tetraisopropyl titanate and 3g of titanate coupling agent TMC-3 were dissolved in 200mL of dichloromethane to obtain an oil phase; 22g of ferrous chloride , 20g cobalt chloride, 18g sodium stearate and 7g porogen were dissolved in 70mL water to obtain the water phase; the water phase was added dropwise to the oil...

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Abstract

The invention provides a composite sewage treatment agent and a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing chitosan dithiocarbamate; s2, preparing magnetic thick-wall porous titanium dioxide hollow spheres; s3, preparing a nutrient solution; s4, preparing a strain seed solution; s5, preparing a compound microbial agent; s6, preparing the magnetic spheres coated with the chitosan dithiocarbamate; and S7, preparing the composite sewage treatment agent. According to the composite sewage treatment agent, the chitosan dithiocarbamate is wrapped in the hollow spheres so that the composite sewage treatment agent has excellent effects of adsorbing, precipitating and fixing heavy metals, and the titanium dioxide wall material alsohas photocatalytic activity, endocrine interferon, algal toxin, pathogenic microorganisms and the like are effectively removed; microorganisms fixed on the surface can effectively degrade organic pollutants in sewage, and the composite sewage treatment agent also has ferromagnetism, is removed through a magnet after sewage treatment operation is completed, and is safer and more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite sewage treatment agent and its preparation method and application. Background technique [0002] At present, the lack of water resources has become one of the major problems plaguing human development. Water pollution is an environmental problem that spreads all over the world. Whether in developing countries or developed countries, this problem has attracted more and more attention. Effectively treating wastewater and rehabilitating polluted water bodies and making them reusable resources has become increasingly urgent and important in China, where the economy is developing rapidly and per capita fresh water resources are very scarce. [0003] Domestic sewage and industrial sewage generally contain a large amount of suspended solids, heavy metal ions, N-containing pollutants, S-containing pollutants, P-containing pollutants, persistent organic pollutants, p...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/30
CPCC02F3/34C02F2101/30
Inventor 王存建董锡洪金峰
Owner 纳琦绿能工程有限公司
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