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A method and system for removing COD from kitchen waste wastewater

A technology for kitchen waste water and kitchen waste, which is applied in the direction of chemical instruments and methods, grease/oily substance/floating matter removal devices, multi-stage water treatment, etc., and can solve the problem of small processing capacity of a single device, low-level waste treatment technology, Deal with complex procedures and other issues, to achieve the effect of improving the quality of urban living environment, good sterilization and disinfection effect, and flexible operation

Active Publication Date: 2020-09-11
GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large energy consumption, small processing capacity of a single device, and complicated follow-up processing procedures
[0007] It can be seen that the domestic waste treatment technology is still in a relatively low-level development stage.
Moreover, it is mixed with domestic waste for treatment, which not only increases the difficulty of treatment, but also wastes a lot of resources, but in fact, it is possible to effectively treat kitchen waste and wastewater separately.

Method used

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  • A method and system for removing COD from kitchen waste wastewater
  • A method and system for removing COD from kitchen waste wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The method for removing COD of kitchen waste wastewater provided by the present embodiment comprises the following steps:

[0048] (1) Select kitchen waste for pretreatment to obtain kitchen waste water;

[0049] (2) Detect the initial value of COD in the kitchen wastewater, and detect the pH value of the kitchen wastewater to judge the acidity and alkalinity of the kitchen wastewater;

[0050] (3) If the kitchen waste water is alkaline, add an oxidizing agent and a catalyst to the kitchen waste water, mix and stir to make it fully react, then add chlorine dioxide to oxidize and precipitate the reaction product, and carry out sterilization at the same time. After the reaction, separate the supernatant and the bottom sediment, and discharge the supernatant after passing the COD test;

[0051] (4) If the kitchen waste water is acidic, feed chlorine dioxide, oxidant and catalyst into the kitchen waste water at the same time, mix and stir to make it fully react, then add t...

Embodiment 2

[0060] Such as figure 2 As shown, the COD removal system of kitchen waste wastewater provided by the present embodiment includes an oxidant container 1, a hydrochloric acid container 4, a kitchen wastewater purification reaction device 6, an oxidant and a catalyst premix container 9, and a catalyst container 11, and the oxidant container 1 1. Kitchen wastewater purification reaction device 6, oxidant and catalyst premixing container 9 are connected by pipeline, hydrochloric acid container 4 is arranged between oxidant container 1 and kitchen wastewater purification reaction device 6, and hydrochloric acid container 4 is purified by pipeline and kitchen wastewater The reaction devices 6 are connected, and the catalyst container 11 is connected with the oxidant and catalyst premixing container 9 through pipelines.

[0061] An oxidant control valve 2 is provided on the pipeline connecting the oxidant container 1 and the kitchen waste water purification reaction device 6 .

[00...

Embodiment 3

[0073] The method and system for removing COD of kitchen waste wastewater in the present invention are used in a certain kitchen waste treatment station, and the specific process is as follows:

[0074] A kitchen waste treatment station separated 1 ton of kitchen waste into solid and liquid, and obtained 10L of kitchen waste water after liquid phase filtration. It was detected that the COD content of the kitchen waste water was 54200 mg / L, pH=7.56, and it was alkaline waste water. , At the same time into the suspension 356mg / L.

[0075] The kitchen waste water is passed into and stored in the kitchen waste water purification reaction device. Stir and mix the sodium hypochlorite and ferrous sulfate, add the mixture to the kitchen wastewater, and mix thoroughly for 30 minutes. The mass ratio of oxidant to kitchen wastewater is 5:1000, and the mass ratio of ferrous sulfate to kitchen wastewater is 0.5:1000. At the same time, prepare sodium hypochlorite with a concentration of 3m...

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Abstract

The invention discloses a method for removing kitchen waste wastewater COD. The method comprises the following steps: (1) pre-treating kitchen waste to obtain kitchen wastewater; (2) detecting a COD initial value in the kitchen wastewater, detecting the pH value of the kitchen wastewater, and judging the acid- alkaline property of the kitchen wastewater; (3) if the kitchen wastewater is alkaline, adding an oxidant and a catalyst into the kitchen wastewater, uniformly mixing and stirring to enable the oxidant and the catalyst to react sufficiently, adding chlorine dioxide to perform oxidative deposition and sterilizing disinfection on the reaction product, separating supernatant and bottom deposit after the reaction is finished, and discharging after the COD of supernatant is qualified in detection; and (4) if the kitchen wastewater is acid, introducing chlorine dioxide, the oxidant and the catalyst into the kitchen wastewater at the same time, uniformly mixing and stirring to enable sufficient reaction, adding the oxidant and the catalyst to perform purification reaction, separating the supernatant and bottom deposit after the reaction is completed, and discharging after the COD of the supernatant is qualified in detection. The invention further discloses a system for removing COD.

Description

technical field [0001] The invention belongs to the technical field of kitchen garbage wastewater, and in particular relates to a method and system for removing COD from kitchen garbage wastewater. Background technique [0002] In recent years, with the development of my country's social economy and the increase of residents' income, the food on the table is rich and diverse, and there are many kinds of food. Due to its high moisture content and low calorific value, food waste has not been properly treated and utilized, thus occupying a large amount of landfill storage capacity, and is the main source of landfill gas and leachate, causing secondary pollution of landfill. Therefore, it is necessary to classify and collect food waste and treat it separately. At the same time, while separating food waste from domestic waste, if it is not treated in a timely and effective manner, it will also bring many environmental and safety problems, such as rot and deterioration, odor, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/76C02F1/50C02F9/04
CPCC02F1/001C02F1/40C02F1/50C02F1/725C02F1/766C02F9/00C02F2001/007C02F2301/08
Inventor 陈满英路风辉刘琼梁有生刘毅张太平
Owner GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION