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A method for treating black and odorous water with graphene-modified straw materials

A graphene modification and material treatment technology, which is applied in water treatment parameter control, chemical instruments and methods, and sustainable biological treatment, can solve the problems of weak microbial adsorption, unfavorable microbial activity, and easy decomposition by bacteria. Achieve the effects of strong reproducibility, weakening impact and poisoning, and easy solid-liquid separation

Active Publication Date: 2021-03-19
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic carriers mainly include activated carbon, diatomaceous earth, etc. They have good strength and are easy to prepare and operate, but the adsorption of microorganisms is not firm.
Organic materials are mainly divided into two types: natural polymer materials and synthetic polymer materials: the former mainly includes agar, sodium alginate, etc., which are non-toxic to microorganisms, but have low mechanical strength, are easily decomposed by bacteria, and have a short lifespan; The other is polystyrene, polyvinyl alcohol and other materials, which have good mechanical properties and long life, but are not conducive to microbial activity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Cut the washed and dried corn stalks into blocks of uniform size: r=7mm, h=4mm, wash with deionized water and dry for later use; soak the above-mentioned treated straw blocks in 0.5mol / L hydrochloric acid solution , react in a constant temperature water bath at 50°C for 1.5h, take out the straw block, wash it with distilled water until the filtrate is neutral, and dry it in a blast drying oven at 35°C; use graphite oxide with a concentration of 2.4mg / mL Soak the above-mentioned treated straw material in a 45°C water bath, wash it three times with deionized water after 48 hours, and dry it naturally; soak the undamaged graphene-modified straw material with a concentration of 1.8% sodium alginate solution , after 32 hours, wash with deionized water for 3 times, and air-dry naturally to obtain a graphene-modified straw material;

[0022] The activated sludge is domesticated with black and odorous wastewater: after the sludge is taken from the sewage treatment plant, it is ...

Embodiment 2

[0025] Cut the washed and dried corn stalks into blocks of uniform size: r=7mm, h=4mm, wash with deionized water and dry for later use; soak the above-mentioned treated straw blocks in 0.5mol / L hydrochloric acid solution , reacted in a constant temperature water bath at 55°C for 1h, took out the straw block, washed it with distilled water until the filtrate was neutral, and dried it in a blast drying oven at 30°C; The solution soaked the above-mentioned treated straw material in a water bath at 50°C, washed three times with deionized water after 48 hours, and dried naturally; soaked the undamaged graphene-modified straw material with a concentration of 1.8% sodium alginate solution, After 32 hours, wash with deionized water 3 times, and air-dry naturally to obtain a graphene-modified straw material;

[0026] The activated sludge is domesticated with black and odorous wastewater. The domestication method is as follows: after the sludge is taken from the sewage treatment plant, ...

Embodiment 3

[0029] Cut the washed and dried corn stalks into blocks of uniform size: r=7mm, h=4mm, wash with deionized water and dry for later use; soak the above-mentioned treated straw blocks in 0.5mol / L hydrochloric acid solution , react in a constant temperature water bath at 60°C for 1.5h, take out the straw block, wash it with distilled water until the filtrate is neutral, and dry it in a blast drying oven at 40°C; use graphite oxide with a concentration of 2.4mg / mL Soak the above-mentioned treated straw material in a 45°C water bath, wash it three times with deionized water after 48 hours, and dry it naturally; soak the undamaged graphene-modified straw material with a concentration of 1.8% sodium alginate solution , after 32 hours, wash with deionized water for 3 times, and air-dry naturally to obtain a graphene-modified straw material;

[0030] The activated sludge is domesticated with black and odorous wastewater. The domestication method is as follows: after the sludge is taken...

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PUM

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Abstract

The invention relates to a method for treating black odorous water by graphene-modified straw material. The method comprises the following steps of cutting the cleaned and dried corn straw into blockswith uniform size, cleaning by deionized water, and drying for further use; soaking into a hydrochloric acid solution, reacting for 1 to 2h in a constant-temperature water bath pot at the temperatureof 50 to 60 DEG C, fetching out the straw, washing by water, drying, soaking the treated straw material by a graphene oxide solution, washing for three times after 48h, and naturally airing; soakingthe undamaged graphene-modified straw blocks into a sodium alginate solution at room temperature, washing after 32h, and airing; soaking the prepared graphene straw blocks into the domesticated sludge, aerating until a sludge-shaped biofilm is formed at the surface of the carrier, and then applying the graphene-modified straw material after film hanging to treat the black odorous wastewater. The method has the advantages that the treatment efficiency is high, the cost is low, the operation is simple and is easy to control, the change stability of water quality is high, and the carrier materialcan be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for smelly black water. Background technique [0002] Black and odorous water is an extreme state of organic pollution in water bodies, which has the characteristics of black and smelly, organic matter corruption, decomposition, fermentation and refractory degradation. Looking at the current situation of black and odorous water pollution, there is an urgent need for effective wastewater treatment technologies, but traditional physical and chemical methods such as dredging, interception, direct aeration, flocculation, and adsorption are not effective in the treatment of black and odorous water, and the cost High and easy to cause secondary pollution. At present, biological treatment technology is widely used. It can decompose organic matter into stable inorganic matter. It is economical and efficient, has no secondary pollution, and has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F2209/08C02F2209/14Y02W10/10
Inventor 张雯任小慧董月张振
Owner YANSHAN UNIV