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Treatment method of nondegradable substances in kitchen waste

A treatment method and technology for kitchen waste, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as water biological pollution, high fat solubility, and human health threats

Active Publication Date: 2015-04-29
龙岩恒净环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these refractory substances are difficult to degrade naturally, they will cause continuous harm to humans. If they are directly discharged into rivers without treatment, refractory substances are water-soluble and highly fat-soluble, causing pollution to water organisms. These toxic substances are in The accumulation of aquatic organisms also poses a huge threat to human health
[0004] Commonly used kitchen waste treatment methods include: incineration, anaerobic digestion, sanitary landfill, earthworm composting, etc., but these methods cannot effectively remove refractory substances in kitchen waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 1000g of catering waste samples into the filter container, stir, squeeze at high temperature, filter to remove solid residues, measure the content of refractory substances in the filtrate to 180mg / L through the instrument, put the filtrate into a four-necked reaction bottle, pass through Add 0.49mol / L concentrated sulfuric acid to ozone for 20 minutes to adjust the pH to 3. After stirring evenly, let it stand for 5 minutes, add 100mL hydrogen peroxide dropwise, heat up to 35°C, stir magnetically for 1 hour, and place the stirred solution in an external irradiator. In the medium, irradiate at 550W for 2 minutes to stop the irradiation, add 50g of sodium oxalate, stir slowly for 30 minutes, add 50g of ferric hydroxide, heat up to 50°C, add electrodes, apply a 20 mA micro-electric field, react for 2 hours, add 2mol / L of sodium hydroxide solution to adjust the pH to be neutral, add 200g gac, absorb solid impurities, filter, and detect that the refractory substance con...

example 2

[0023] Weigh 3000g of food waste samples into the filter container, stir, squeeze at high temperature, and filter to remove solid residues. The content of refractory substances in the filtrate is measured to be 177mg / L by the instrument. Add 0.49mol / L concentrated sulfuric acid to ozone for 20 minutes to adjust the pH to 4. After stirring evenly, let it stand for 5 minutes, add 150mL hydrogen peroxide dropwise, heat up to 40°C, stir magnetically for 1 hour, and place the stirred solution in an external irradiator. In the medium, irradiate at the intensity of 550W for 2 minutes to stop the irradiation, add 75g of sodium oxalate, stir slowly for 30 minutes, add 80g of ferric hydroxide, heat up to 50°C, add electrodes, apply a 20 mA micro-electric field, react for 2 hours, add 2mol The sodium hydroxide solution of / L adjusts pH to be neutral, adds 300g gac, absorbs solid impurity, filters, and is 0.22mg / L by detecting refractory substance content in the filtrate, and removal rate ...

example 3

[0025] Weigh 400g of food waste samples into the filter container, stir, squeeze at high temperature, and filter to remove solid residues. The content of refractory substances in the filtrate is measured to be 180mg / L by the instrument, and the filtrate is put into a four-necked reaction bottle. Add 0.49mol / L concentrated sulfuric acid to ozone for 20 minutes to adjust the pH to 5, stir well, let stand for 5 minutes, add 200mL hydrogen peroxide dropwise, heat up to 40°C, stir magnetically for 1 hour, and place the stirred solution in an external irradiator In the medium, irradiate at 550W for 2 minutes to stop the irradiation, add 100g of sodium oxalate, stir slowly for 30 minutes, add 100g of ferric hydroxide, heat up to 50°C, add electrodes, apply a 20 mA micro-electric field, react for 2 hours, add 2mol The sodium hydroxide solution of / L adjusts pH to be neutral, adds 400g gac, absorbs solid impurity, filters, and is 0.21mg / L by detecting refractory substance content in the...

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Abstract

The invention relates to a treatment method of nondegradable substances in kitchen waste, belonging to the field of sewage treatment. The method comprises the following steps: removing solid residues from kitchen waste, introducing ozone into the filtrate for 20 minutes, adding concentrated sulfuric acid to regulate the pH value to 3-5, dropwisely adding 10 mL of oxydol, stirring for 1 hour, putting the stirred solution in an ultraviolet irradiation instrument, irradiating for 2 minutes under the intensity of 550W, adding sodium oxalate and ferric hydroxide, heating to 50 DEG C, applying a micro-electric field, after the reaction finishes, adding a sodium hydroxide solution to regulate the pH value to neutrality, adding activated carbon to adsorb solid impurities, and filtering, wherein the detection shows that the nondegradable substance content in the filtrate is 0.21 mg / L and the removal rate is 99%. The method is efficient and simple, and has high removal rate.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a method for treating refractory substances in kitchen waste. Background technique [0002] In today's extremely rich material life, the catering industry is growing at a rate of 10% every year, and at the same time, there are more and more kitchen waste. Food waste is called swill, which is easy to rot, ferment, stink, and spread bacteria. The daily production of food waste in a large and medium-sized city can reach more than 1,000 tons. The composition of food waste is complex, mainly including water, oil, Meat, vegetables, rice noodles, plastic, paper towels, etc. The water in the food waste is as high as more than 90%, and the cooking process makes the water contain a lot of organic matter. In recent years, due to the application of plastic and food additives in the catering industry, there are a large number of refractory substances in the food waste. [0003] Refractory subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
CPCC02F1/32C02F1/722C02F1/78C02F9/00C02F2101/30C02F2101/322C02F2301/08
Inventor 郭迎庆
Owner 龙岩恒净环保科技有限公司
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