Separation, recovery and comprehensive utilization of waste oil from kitchen waste

A technology for separation and recycling of kitchen waste, applied in recycling technology, recovery of fatty substances, recovery of fat/fatty acids from waste, etc. It can solve the problems of unutilizable grease, grease pollution, and high grease content, and achieve high grease recovery rate. , easy to operate, low production cost

Inactive Publication Date: 2014-10-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] The present invention proposes a process for the separation, recovery and comprehensive utilization of waste oil from kitchen waste. Affect the problem of oil pollution in the fermentation of food waste saccharification liquid and the separation of fermentation liquid, and use the oil with high added value obtained from separation and recovery to make biodiesel

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  • Separation, recovery and comprehensive utilization of waste oil from kitchen waste

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Embodiment Construction

[0025] The present invention provides a process for separation, recovery and comprehensive utilization of waste oil from kitchen waste. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] In this embodiment, the specific steps for the separation and recycling of grease from food waste and the comprehensive utilization of food waste resources are as follows:

[0027] (a) First, manually sort the food waste collected from canteens, restaurants, and households, and sort out the plastic, metal, bowl fragments, big bone sticks and other sundries. The remaining food waste includes residues , The residual liquid is kept for use after disinfection and sterilization;

[0028] (b) Use a multi-functional grinder to grind the sorted food waste. If there is food waste with a diameter greater than 3cm, use a knife to cut it as small as possible before crushing so that it can enter the grinder machine;

[00...

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Abstract

The invention belongs to the technical field of reclamation of food waste, and in particular relates to a separation, recovery and comprehensive utilization process of waste oil in food waste. The recovery method of the waste oil in the food waste comprises the following steps: firstly, sorting the food waste and then smashing the food waste; adding saccharifying enzyme to saccharify the smashed food waste; carrying out centrifugal separation and recovery on the waste oil in a food waste saccharifying liquid, and then filtering with a fiber ball-ceramsite composite bed to remove the waste oil in the food waste; and carrying out lactic acid fermentation on the food waste saccharifying liquid obtained by filtration, and then carrying out membrane separation on food waste lactic acid fermentation broth by adopting an electroosmosis method so as to finally obtain lactic acid. The process disclosed by the invention is convenient to operate, high in oil recovery rate and low in production cost; and by using the process, the separation of the oil from the food waste can be effectively realized, and the requirements of subsequent lactic acid fermentation and fermentation broth separation of the food waste are met, thereby effectively improving the further reclamation utilization efficiency of the food waste.

Description

technical field [0001] The invention belongs to the technical field of recycling and utilization of kitchen waste, and in particular relates to a process for separation, recovery and comprehensive utilization of waste oil in kitchen waste, which is suitable for the resourceful comprehensive utilization of kitchen waste in canteens, restaurants, hotels and the like. Background technique [0002] Kitchen waste is the domestic waste formed by residents in the process of living consumption. It is mainly divided into food waste and kitchen waste. The main characteristics are rich organic matter content, large oil content, and complex composition. Improper disposal of food waste can easily cause environmental pollution; however, food waste is particularly rich in nutrients and has the potential for resource utilization. The treatment and comprehensive utilization of food waste has become a research hotspot at home and abroad . Due to the high oil content and complex composition o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00C11B13/00C10L1/02
CPCY02E50/13Y02E50/10Y02W30/74
Inventor 程桂石赵莹董长青汪群慧李龙刚
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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