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Method of removing oil in catering wastewater by adopting shaddock peel

A technology for catering wastewater and grapefruit peels, applied in separation methods, chemical instruments and methods, grease/oily substances/floating matter removal devices, etc., can solve the problem of increasing the load of urban sewage treatment plants, large environmental hazards, and insufficient cost performance of adsorbents Advanced problems, to achieve the effect of good degreasing effect, low price and low operating cost

Inactive Publication Date: 2013-01-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the disadvantages that the waste oil contained in the existing catering wastewater is harmful to the environment and increases the load of urban sewage treatment plants, and the current adsorbents for treating catering wastewater are not cost-effective enough, and uses grapefruit peels as raw materials to provide a , low price, good adsorption effect, and good product stability to remove waste oil from catering wastewater

Method used

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  • Method of removing oil in catering wastewater by adopting shaddock peel

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Experimental program
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Effect test

Embodiment 1

[0015] Remove the outermost yellow skin from the discarded pomelo peel, wash it with water, and cut it into pieces. Then the blocky pomelo peel material was washed with water, placed in a constant temperature drying oven, and dried at 70°C until it reached a constant weight. Use a high-speed pulverizer to crush through a 40-mesh sieve to obtain pomelo peel particles with required particle sizes, and then prepare the pomelo peel adsorbent for degreasing catering wastewater.

[0016] Take 200ml of catering wastewater, the initial concentration of oil is 523.87mg / L, put it in a 500ml beaker, adjust the pH value to 3, add 2g of pomelo peel adsorbent and shake it on a constant temperature shaker at 25°C for 3h, and the shaker speed is 125r / min; After the adsorption is completed, take a sample, and take a sample to measure the concentration of waste oil in the sample. The calculated adsorption capacity of pomelo peel adsorbent to waste oil is 45.2mg / g.

[0017] The instrument for ...

Embodiment 2

[0025] Remove the outermost yellow skin from the discarded pomelo peel, wash it with water, and cut it into pieces. Then the blocky pomelo peel material was washed with water, placed in a constant temperature drying oven, and dried at 80°C until it reached a constant weight. Use a high-speed pulverizer to crush through a 20-mesh sieve to obtain pomelo peel particles with required particle sizes, and then prepare the pomelo peel adsorbent for degreasing catering wastewater.

[0026] Take 400ml of catering wastewater, the initial concentration of oil is 509.61mg / L, put it in a 1000ml beaker, adjust the pH value to 3, add 6g of pomelo peel adsorbent and shake it on a constant temperature shaker at 25°C for 3h, and the shaker speed is 125r / min; After the adsorption is completed, take a sample, and take a sample to measure the concentration of waste oil in the sample. The calculated adsorption capacity of pomelo peel adsorbent to waste oil is 32.5mg / g.

Embodiment 3

[0028] Remove the outermost yellow skin from the discarded pomelo peel, wash it with water, and cut it into pieces. Then the blocky pomelo peel material was washed with water, placed in a constant temperature drying oven, and dried at 90°C until it reached a constant weight. Use a high-speed pulverizer to crush through a 5-mesh sieve to obtain pomelo peel particles with required particle sizes, and then prepare the pomelo peel adsorbent for degreasing catering wastewater.

[0029] Take 1L of catering wastewater, the initial concentration of oil is 503.35mg / L, put it in a 2000ml beaker, adjust the pH value to 3, add 25g of grapefruit peel adsorbent and shake it on a constant temperature shaker at 25°C for 3h, and the shaker speed is 125r / min; After the adsorption is completed, take a sample, and take a sample to measure the concentration of waste oil in the sample. The calculated adsorption capacity of pomelo peel adsorbent to waste oil is 18.7mg / g.

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Abstract

The invention discloses a method of removing oil in catering wastewater by adopting shaddock peel. The method comprises the following steps of: after removing yellow peel of the waste shaddock peel on the outermost layer and cleaning by clean water, cutting into blocks, washing the blocky shaddock peel so as to remove pigment and other dissolved matters, placing the washed blocky shaddock peel into a constant-temperature drying box and drying to constant weight; crushing and screening by a crushing machine to obtain shaddock peel particles with grain sizes of 5-40 meshes so as to prepare a shaddock peel absorbent, taking 200-1000 mL of the catering wastewater, adjusting a pH value to 3, adding 2-25 g of the shaddock peel absorbent and oscillating in a table at constant temperature of 25 DEG C, and removing the oil after absorption is completed. According to the dissolved oil and other dissolved organic maters in the wastewater are absorbed on the surface by utilizing porosity and large specific surface area of an oil removal absorbent of the shaddock peel, so that the absorptive performance is good; and agriculture and forestry waste resources are fully utilized, so that the waste is changed into the wealth, and the processing cost is reduced.

Description

technical field [0001] The invention relates to the treatment of oily catering wastewater, in particular to a method for removing oil from catering wastewater by using pomelo peels, which are agricultural and forestry wastes, as raw materials. Background technique [0002] Catering waste water is the use of a large amount of animal and vegetable oils in the catering process. After heating, frying, and frying, part of it enters the food, and the rest is mixed with kitchen sewage during the process of washing tableware, oil pans, and pouring out residual oil and leftovers. into the sewer to form. Due to the high concentration of animal and vegetable oils and a large amount of suspended solids in the oily wastewater of the catering industry, it has become a high-concentration pollution source in cities. Untreated and directly discharged catering wastewater will not only increase the load of urban sewage treatment plants, but also affect the capacity of the urban drainage pipe ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/40B01J20/24
Inventor 张凤娥翁建兵雷春生董良飞
Owner CHANGZHOU UNIV