Method and equipment for rapid pretreatment of kitchen waste
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A food waste and pretreatment technology, which is applied in the fields of solid waste removal, climate change adaptation, organic fertilizer, etc., can solve the problems of low utilization rate of solid products and poor treatment effect of food waste, and improve solid-liquid separation Effects of Efficiency, Stability and Efficiency Improvement
Active Publication Date: 2021-01-15
HUAZHONG UNIV OF SCI & TECH
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[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and equipment for rapid pretreatment of food waste, wherein the method determines the reaction temperature of food waste for thermal hydrolysis reaction according to the reuse method of solid products Correspondingly, it can effectively solve the problem of poor treatment effect of food waste and low utilization rate of solid products, so it is especially suitable for the application of food waste treatment
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Embodiment 1
[0047] (a) Adding water to rice kitchen waste and pulverizing it into a microwave thermal hydrolysis device;
[0048] (b) The pulverized meal kitchen waste is subjected to a thermal hydrolysis reaction in a microwave thermal hydrolysis device, the reaction temperature is set at 140° C., and the reaction time is 55 minutes;
[0049] (c) After the reaction is completed, the gas product is purified and discharged, and then the solid-liquid product is separated step by step to obtain solid product, oil and waste water, the solid product and oil are collected, the solid product is used for anaerobic digestion, and the waste water is treated rear discharge.
Embodiment 2
[0051] (a) Adding water to the mixed kitchen waste and pulverizing it into a microwave thermal hydrolysis device;
[0052] (b) The pulverized mixed kitchen waste is subjected to a thermal hydrolysis reaction in a microwave thermal hydrolysis device, the reaction temperature is set at 160°C, and the reaction time is 80 minutes;
[0053] (c) After the reaction is completed, the gas product is purified and discharged, and then the solid-liquid product is separated step by step to obtain solid product, oil and waste water, the solid product and oil are collected, the solid product is used for anaerobic digestion, and the waste water is treated rear discharge.
Embodiment 3
[0055] (a) adding water to the meat kitchen waste and pulverizing it into a microwave thermal hydrolysis device;
[0056] (b) The crushed meat kitchen waste is subjected to thermal hydrolysis reaction in a microwave thermal hydrolysis device, the reaction temperature is set to 180°C, and the reaction time is 40 minutes;
[0057] (c) After the reaction is completed, the gas product is purified and discharged, and then the solid-liquid product is separated step by step to obtain solid product, oil and waste water, the solid product and oil are collected, the solid product is used for anaerobic digestion, and the waste water is treated rear discharge.
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Abstract
The invention belongs to the technical field of kitchen waste treatment, and particularly discloses a method and equipment for rapid pretreatment of kitchen waste. The method comprises the following steps that water is added into the to-be-pretreated kitchen waste, the to-be-pretreated kitchen waste is crushed and is fed into a microwave thermal hydrolysis device to carry out a thermal hydrolysisreaction, and after the reaction is completed, a gas product is purified and discharged; and a solid-liquid product is separated by step to obtain a solid product, grease and waste water, the solid product and the grease are collected for reutilization, and the waste water is discharged after treatment, wherein the temperature and the time of the thermal hydrolysis reaction are set according to the recycling mode of the solid product. According to the method and equipment, the kitchen waste is treated by adopting the microwave thermal hydrolysis technology, organic substances of the kitchen waste can be retained to the maximum degree under a relatively mild reaction condition, and the heat value of the product is improved; and meanwhile, the temperature and time of the thermal hydrolysis are set according to the recycling mode of the solid product, and therefore the problems that the kitchen waste treatment effect is poor and the utilization rate of solid product is low due to the single reaction condition can be effectively solved.
Description
technical field [0001] The invention belongs to the technical field of kitchen waste treatment, and more specifically relates to a method and equipment for rapid pretreatment of kitchen waste. Background technique [0002] If the kitchen waste is not treated in a timely and effective manner, it is easy to rot and deteriorate, and its properties and odor will have a bad impact on environmental sanitation, and it is easy to breed harmful substances such as pathogenic microorganisms and mycotoxins; in addition, due to the lack of effective According to regulatory measures, kitchen waste may also be transformed into "gutter oil" and "swill pigs", which seriously threaten the food safety of the people. Therefore, it is urgent to deal with food waste. [0003] The current treatment method of food waste is mainly centralized collection and transportation, but the high water content of food waste and long transportation distance will easily lead to pollution of the road along the w...
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Application Information
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