Experimental investigation of Microcystis aeruginosa cyanobacteria thickening to obtain a biomass for the energy production

Abstract

The purpose of the presented research is to analyse possible methods of thickening of the Microcystis aeruginosa (Kützing) Kützing cyanobacteria using the obtained concentrate as a biomass for the production of energy carriers and biologically valuable substances. Method of cyanobacteria thickening under the action of electric current and in the electric field, as well as the method of coagulation–flocculation and gravity thickening, was experimentally investigated in labscale conditions. Electrical methods didn't show positive results for the Microcystis aeruginosa thickening, despite the reports of their potential efficiency in a number of previous studies. The high efficiency of the method of coagulation– flocculation and gravity thickening of Microcystis aeruginosa suspensions was obtained. The optimum concentrations of industrial polymeric coagulants and flocculants for the thickening of Microcystis aeruginosa suspensions were defined in the range of about 10 ppm for the coagulants and about 1 ppm for the flocculants. Negative effect of the previous cavitational treatment of the diluted suspensions of Microcystis aeruginosa on the effectiveness of the coagulation–flocculation and gravitational thickening was confirmed experimentally. Hydrodynamic cavitation should be recommended to use after the thickening as the next step of processing of concentrated suspensions of Microcystis aeruginosa to achieve maximum extraction of energy carriers and biologically valuable substances.

The Analysis of a Prototype Installation for Biogas Production from Chosen Agricultural Substrates

“…This enables the chamber (13) to gravitationally discharge the digestated substrate and maintain a constant level of this substrate in the chamber (13). The fermented substrate accumulated in the equalization tank (21), by means of the pump (15) installed therein, is fed through the separator pipe (22) to the separator (23). The separator (23) separates the solid fractions from the liquid fractions.…”

“…An important part of the chamber (13) equipment is a solar panel (18), supplying heaters (19), installed inside the fermentation chamber (13). From the side wall of the chamber (13) there is a drainage pipe (20) directed to the equalization tank (21) is provided. This enables the chamber (13) to gravitationally discharge the digestated substrate and maintain a constant level of this substrate in the chamber (13).…”

“…The main purposes of using methane production by fermentation of natural fertilizers in agriculture are primary utilization and to obtain fuel. Considering the issue as a whole, all of the beneficial aspects should be taken into account: fertilization, energy production and, in particular, ecology [1,[13][14][15][16][17][18][19][20][21].…”

Optimum collection and concentration strategies of hydrobionts excess biomass in biological surface water purifying technologies

“…In our opinion, at the second stage it is advisable to use reagent treatment, which will achieve a greater degree of concentration. The study of the effectiveness of the coagulation -flocculation concentration method (Malovanyy et al, 2019) was performed according to the aforementioned method. The conditions of the reagent research regime are given in Table 1, the research results are shown in Fig.4.…”

Economic and Environmental Benefits of Using Cavitation Treated Fuel in Vehicles of Internal Combustion Engines

“…The defining feature of modernity is intensive research on introduction of the energy-saving technologies and aspects of the renewable energy sources use. It is necessary to note the use of energysaving technologies in industry [1], the development of thermal modernization in the communal sphere [2], the synthesis of biogas as an efficient energy source [3], the use of energy for the synthesis of aquatic organisms [4], particularly microalgae [5][6]. An important aspect of these problems is introduction of the energy-saving technologies in transport.…”