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Optimal adjustment method for anaerobic digestion process parameter

A technology of anaerobic digestion and process parameters, applied in the field of environmental treatment, can solve problems such as large gas production, and achieve the effect of reducing work intensity, improving work efficiency and work quality

Pending Publication Date: 2022-01-04
中船环境工程有限公司
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AI Technical Summary

Problems solved by technology

It is unrealistic to rely on manpower alone to ensure the daily production of product gas as large as possible

Method used

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Examples

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Embodiment Construction

[0018] The following are specific examples of the present invention to further describe the technical solutions of the present invention, but the present invention is not limited to these examples.

[0019] Anaerobic digestion process parameters are not independent, but interrelated, and some parameters are even interlocking.

[0020] For the liquid level height of the feed tank, the liquid level must be within a certain range. If it is too high, the raw materials will overflow the feed tank, causing environmental pollution and waste of raw materials; if it is too low, the agitator of the feed tank will be suspended. , which is not good for the mixer. For the agitator in the feed tank, it does not need to work 24 hours a day. The agitator only needs to work when the tow truck is unloading or the feed pump is turned on. For the feed pump, it will only be turned on when the anaerobic tank needs to be fed or the liquid level of the feed tank is too high, and it is generally clos...

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Abstract

The invention discloses an optimal adjustment method for anaerobic digestion process parameters. The method comprises the steps that five key parameters, namely anaerobic jar temperature T, anaerobic jar pH, anaerobic jar slurry amount L, anaerobic jar slurry solid content G and anaerobic jar accumulative stirring duration J, are selected as independent variables, anaerobic digestion gas production Q is selected as a dependent variable, and a K nearest neighbor method is used to establish a fitting function; and a gas production function Q is optimized and analyzed, and a value of each key process parameter is solved when energy consumption is lowest and the anaerobic digestion gas production is maximum, wherein for an optimization problem of the anaerobic digestion gas production, the number of objective functions is three, namely Q, T and J, an evaluation function and three constraint conditions are constructed, and establishment of a mathematical model for multi-objective planning of the anaerobic digestion gas production is completed. According to the invention, automatic optimal adjustment of process parameters is realized, so that the working intensity of operators is reduced, and the working efficiency and the working quality are greatly improved.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, in particular to an optimal adjustment method of anaerobic digestion process parameters. Background technique [0002] Anaerobic digestion is a very important solid waste treatment method. It is to put organic matter (food waste, kitchen waste, livestock and poultry manure, organic sludge, agricultural waste, etc.) into a closed container (anaerobic tank) Anaerobic fermentation is the process of decomposing organic macromolecules into methane-based biogas. Compared with landfill, incineration, composting and other disposal methods, anaerobic digestion is currently the most widely used resource disposal method in the world due to its efficient resource recovery and low environmental impact. [0003] Anaerobic digestion and biogas purification system is mainly composed of mechanical pretreatment system, anaerobic digestion system (composed of one or several anaerobic tanks), and bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06K9/62C02F11/04G06F111/06G06F111/10
CPCG06F30/20C02F11/04G06F2111/10G06F2111/06G06F18/23213
Inventor 阳红许鹏易卫华雷文胜刘军李赟
Owner 中船环境工程有限公司
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