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Agricultural waste dry-process anaerobic-fermentation automatic control device and automatic control operation method

An agricultural waste and dry anaerobic technology, which is applied in the field of automatic control devices for dry anaerobic fermentation of agricultural waste, can solve the problems of complex restart process, high cost, collapse, etc., so as to alleviate the problem of biomass energy substitution and ease The shortage of organic fertilizer, the effect of expanding new ways

Pending Publication Date: 2019-07-26
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the high solid content of the fermentation stream, the system often collapses due to failure to achieve good mass transfer of fermentation materials, severe acidification, etc., and the restart process is complicated and expensive

Method used

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  • Agricultural waste dry-process anaerobic-fermentation automatic control device and automatic control operation method
  • Agricultural waste dry-process anaerobic-fermentation automatic control device and automatic control operation method
  • Agricultural waste dry-process anaerobic-fermentation automatic control device and automatic control operation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 1 , figure 2 Shown, the present invention a kind of agricultural waste dry method anaerobic fermentation automatic control device (automatic agricultural waste dry method anaerobic fermentation device), it comprises a fermentation tank 12; Fermentation tank 12 tank bodies are made of stainless steel, horizontal type It is in the shape of a "capsule" with both ends closed; the fermenter 12 is arranged on the support 32 of the fermentation device, and the tank body is provided with a mirror window 24; the top of the tank body is provided with a feed port 21 (the feed port is provided with a seal The screw cap of ring), acid-base inlet 22; Tank body bottom is provided with discharge port 29 (discharge port 29 is connected with vacuum pump all the way, and another road is connected with solid-liquid separator 17, return pump 19 inlets successively, and return pump 19 The outlet is connected to the feed port 21), pH probe interface 31; the fermentation tank ...

Embodiment 2

[0069] Example 2 Different N source addition amount treatment group

[0070] In this group of experiments, rice straw was used as the main reaction raw material, and by using different N source additions, the self-controlled dry anaerobic fermentation of agricultural waste was carried out by using the automatic control device and the automatic control operation method of the dry anaerobic fermentation of agricultural waste described in Example 1. Run the test to investigate the effect of different N source additions (that is, different C / N) on the gas production potential of straw.

[0071] 1. Experimental design and condition control

[0072] In areas where rice production is the main area, the main fermentation material is rice straw (rice straw). Considering that fresh pig manure is rich in organic and inorganic N and other nutrients such as S and P suitable for microbial activities, and has different types Anaerobic microorganisms are suitable as N source additives. In t...

Embodiment 3

[0090] Embodiment 3 different inoculum amount treatment groups

[0091] In this group of experiments, rice straw was used as the main reaction raw material, and by adding different proportions of exogenous inoculum, the dry anaerobic fermentation of agricultural waste was carried out by using the automatic control device and automatic control operation method for dry anaerobic fermentation of agricultural waste described in Example 1. The self-controlled operation test was conducted to investigate the effects of different inoculum on the gas production potential and fermentation efficiency (gas production efficiency) of straw.

[0092] 1. Experimental design and condition control

[0093] In the operation of anaerobic fermentation biogas production projects, it is often necessary to add a certain amount of inoculum rich in different types of anaerobic microorganisms at the feed end through measures such as biogas slurry reflux to improve gas production efficiency and increase ...

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Abstract

The invention provides an agricultural waste dry-process anaerobic-fermentation automatic control device and an automatic control operation method. The device comprises a horizontal closed fermentation tank, wherein the top of the tank body is provided with a feeding port, and the bottom of the tank body is provided with a discharging port; the fermentation tank is provided with a mechanical stirring system, a water bath circulating heating system, a temperature on-line monitoring system, a pH on-line monitoring system, a gas flow monitoring system and a PLC control system. The method comprises the steps of automatically controlling dry material wet material feeding, inoculum and N source addition through the PLC control system, automatically controlling the temperature and pH value of anaerobic fermentation in running anaerobic fermentation, automatically controlling biogas slurry to flow back to a feeding end, and adjusting and controlling the solid content rate of a reaction material to be 15-20%; automatically stirring turning the materials in time. The device can monitor the biogas production characteristics and potential of different material ratios and especially aims at solving the problem that the types and proportions of agricultural wastes in different regions are different, and the optimal operation parameter testing device is provided for improving the combined dry-process anaerobic treatment efficiency of various agricultural wastes.

Description

technical field [0001] The invention belongs to the fields of agricultural environmental protection and biomass energy, and in particular relates to an automatic control device and an automatic control operation method for dry anaerobic fermentation of agricultural waste. Background technique [0002] my country produces more than 4 billion tons of agricultural waste every year, making it the country with the largest output of agricultural waste. Among them, the annual production of crop straw is about 730 million tons, the annual production of livestock and poultry manure is about 2.61 billion tons, the township domestic organic waste and human feces are 250 million tons, and agricultural and sideline product processing waste is 150 million tons. than 93.5%. With the rapid development of agricultural production and the continuous increase of population in our country, the annual growth rate of this kind of waste is 5-10%. Reached 4.1 billion tons. [0003] For the treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/38C12M1/36C12M1/34C12M1/107C12M1/02C12Q3/00
CPCC12M21/04C12M23/02C12M23/38C12M27/06C12M29/18C12M41/22C12M41/26C12M41/34C12M41/48C12Q3/00
Inventor 王振旗沈根祥张心良钱晓雍陈静张洪昌朱英
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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