Method and system for extracting sludge protein by focused pulsed electric field

Abstract

The invention discloses a method and system for extracting sludge protein by a focused pulsed electric field. According to the method and system, sludge that is homogenized and flowable flows throughdifferent electric field zones, generated by the staggering of cathode and anode plates, in a focused pulsed electric field sludge reactor; the treated sludge flows out from the reactor, and then is circulated and returned by a circulating pump; after thorough treatment, separation is performed through a high-speed centrifuge; the pH value is adjusted to precipitate protein; and then protein solidis obtained by a freezing vacuum belt type filter. The method and the system utilize electroporation effect of the focused pulsed electric field on biological cells to break sludge cells so that protein in the biological cells can be effectively released. The method and the system have advantages of low energy consumption, fast response, small consumption of pharmaceuticals, and capability of preparing the extracted biological protein with high purity and no side effect.

Description

technical field [0001] The invention belongs to the technical field of sludge resource utilization, in particular to a method and system for extracting sludge protein by a focused pulse electric field. Background technique [0002] Urban domestic sewage plants will discharge a large amount of activated sludge when disposing of sewage. According to the statistics of the National Bureau of Statistics, in 2018, my country's total wastewater discharge was 70.88 billion tons, urban domestic wastewater accounted for 74.4%, and more than 85% of my country's urban sewage All factories use activated sludge as the main disposal method, but this disposal method will generate a large amount of sludge. According to the calculation of 1.2 tons of absolute dry sludge per 10,000 tons of wastewater, 5.3862 million tons of absolute dry sludge will be produced. The direct landfill treatment of this huge surplus sludge will not only generate huge disposal costs, but also bring a series of enviro...

AI Technical Summary

Problems solved by technology

The biggest disadvantages of traditional physical methods and bio-enzyme methods are the low extraction rate, long reaction time and low purity; there are two main traditional chemical methods: mainly acid method and alkali method. The biggest disadvantage is the waste of chemical reagents. High consumption, high protein loss rate, easy side reactions in the extraction process, etc.

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