Light quality and illumination intensity deployment strategy method by utilizing microalga-purified biogas slurry

Abstract

The invention belongs to the technical field of environmental engineering and particularly relates to a light quality and illumination intensity deployment strategy method by utilizing microalga-purified biogas slurry. The method disclosed by the invention comprises the following steps of: during the process of culturing the microalga-purified biogas slurry by utilizing biogas slurry and an LED (light-emitting diode) lamp with specific light quality as a nutritional matrix and an artificial light source, adopting a multistep type illumination intensity regulation strategy, namely regulating the illumination intensity of the LED lamp during the different growth stages of microalga to realize the purposes of saving energy and promoting the growth of the microalga to promote a biogas slurry purification effect. In comparison with a constant type illumination strategy, the multistep type illumination regulation strategy disclosed by the invention can save light energy during the adaptive phase and logarithmic phase of microalga culture. The method disclosed by the invention is good in practicality, and simple and easy to operate; during the process of utilizing the microalga-purified biogas slurry, the light energy can be greatly saved and the economy of a biogas slurry purification method can be improved; and furthermore, the influence caused by light inhibition or insufficient illumination can be avoided, thus the growth of the microalga is further promoted, and the biogas slurry purification effect is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a new method for adjusting the light quality and light intensity of biogas slurry by using microalgae. Background technique [0002] my country's biogas industry began around 1930. At that time, most towns had no power supply, and biogas fermentation was mainly used for lighting in some shops and temples. In the 1970s, my country set off another wave of biogas development. In recent years, due to the increasingly serious international and domestic energy and environmental issues, biogas fermentation technology has been paid more and more attention. In January 2000, the Ministry of Agriculture launched and implemented the "Ecological Homeland Enriching the People Plan" focusing on the comprehensive utilization and construction of biogas and in line with the current stage of agricultural and rural economic development, which greatly promoted the develo...

AI Technical Summary

Problems solved by technology

In the adaptation period of growth, the required light intensity is small because of the low density. At this time, if a constant light intensity is used, it may cause photoinhibition to the growth of microalgae; while the density in the logarithmic phase of growth continues to increase, After reaching the stable period, the density reaches the maximum. At this time, the microalgae cells affect the light effect due to mutual shading, so a larger light intensity is required at this stage. growth of algae

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