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Outflow from a Biogas Plant as a Medium for Microalgae Biomass Cultivation—Pilot Scale Study and Technical Concept of a Large-Scale Installation
| Content Provider | MDPI |
|---|---|
| Author | Marcin, Zieliński Marcin, Dębowski Kazimierowicz, Joanna |
| Copyright Year | 2022 |
| Description | Microalgae-based technologies have huge potential for application in the environment sector and the bio-energy industry. However, their cost-efficiency has to be improved by drawing on design and operation data for large-scale installations. This paper presents a technical concept of an installation for large-scale microalgae culture on digestate liquor, and the results of a pilot-scale study to test its performance. The quality of non-treated digestate has been shown to be insufficient for direct use as a growth medium due to excess suspended solids, turbidity, and organic matter content, which need to be reduced. To that end, this paper proposes a system based on mechanical separation, flotation, and pre-treatment on a biofilter. The culture medium fed into photobioreactors had the following parameters after the processing: COD—340 mgO_{2}$/dm^{3}$, $BOD_{5}$—100 mgO_{2}$/dm^{3}$, TN—900 $mg/dm^{3}$, and TP—70 $mg/dm^{3}$. The installation can produce approx. 720 $kg_{VS}$/day of microalgal biomass. A membrane unit and a thickening centrifuge (thickener) were incorporated into the design to separate and dehydrate the microalgal biomass, respectively. The total energy consumption approximated 1870 kWh/day. |
| Starting Page | 2912 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en15082912 |
| Journal | Energies |
| Issue Number | 8 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-15 |
| Access Restriction | Open |
| Subject Keyword | Energies Microalgae Biogas Plant Digestate Photobioreactor Large-scale Installation |
| Content Type | Text |
| Resource Type | Article |
