Experimental modeling of the microalgae cultivation in a photobioreactor using manure

Andrey Yu Izmailov,Aleksey S Dorokhov,Yakov P Lobachevsky,Yuri A Kozhevnikov,Ravza A Mamedova,A Valiev,M Nizamutdinov,I Safiullin,M Kalimullin,R Nizamov,A Taylan,D.I Zhilyakov,D.A Zyukin,F Nezhmetdinova,B Ziganshin,W Heijman

doi:10.1051/bioconf/20213700114

Abstract

The article studies the experimental process of cultivation of microalgae in a photobioreactor (PBR) to study the effect of technological conditions on the productivity of microalgae. This process allows obtaining initial data for the development of closed cycles of using the energy potential of alga mass in heat and power supply of various industries, including agricultural enterprises (livestock complexes, poultry farms, etc.) The scheme of a closed cycle of power supply of the cattle complex allows obtaining hot water, feed additives to the cattle ration, bio humus, motor biofuel and carbon dioxide, which is advisable to use in the process of cultivating microalgae. The experiments were carried out on a photobioreactor for cultivating microalgae with an intelligent control system. The developed photobioreactor differs from the known ones in the pulsating hydrodynamic regime of feeding the nutrient solution, which provides an increase in the productivity of the microalgae cultivation up to 15%. The experimental model of the cultivation conditions of the microalga Ch. Vulgaris on a combined diet (Tamiya medium + manure substrate) showed a noticeable increase in crop productivity when adding cattle manure extract to the nutrient medium in an amount from 30 to 60% (vol.). This can be used in the development of closed cycles of heat and power supply for cattle farms based on biofuels of the third generation, obtained from the phytomass of microalgae.

Highlights

IntroductionThe industrial production of phytomass of microalgae for energy purposes using agricultural waste will effectively solve the problems of internal energy supply to farms, and environmental problems in the agricultural sector
The use of the peculiarities of the metabolism of microalgae, in particular, their high adaptability to changes in cultivation conditions, is an important independent task of the biofuel industry, since it opens up opportunities for the production of energy biological raw materials with specified physicochemical properties [1,2,3,4,5]
The industrial production of phytomass of microalgae for energy purposes using agricultural waste will effectively solve the problems of internal energy supply to farms, and environmental problems in the agricultural sector. An example of such an integrated approach is an experimental study on the production of microalgae for energy purposes in the wastewater treatment cycle, conducted at the University of Virginia (USA) [6]

Summary

Introduction

The industrial production of phytomass of microalgae for energy purposes using agricultural waste will effectively solve the problems of internal energy supply to farms, and environmental problems in the agricultural sector. An example of such an integrated approach is an experimental study on the production of microalgae for energy purposes in the wastewater treatment cycle, conducted at the University of Virginia (USA) [6]. Wastewater containing organic and mineral components is used as a nutrient medium for the cultivation of microalgae phytomass on a special farm, which can be organized using open reservoirs or in glazed pavilions using heating and artificial lighting

Methods

Results

Conclusion