This paper addresses the efficiency of a microalgae-based agricultural digestate treatment at pilot-scale in an outdoor raceway pond (880 L, pH-dependent CO2 dosage) and in a bubble column (74.5 L, air-bubbling). Specifically, nitrogen removal, evolution of the algae-bacteria consortium, and the actual process applicability in the Po Valley climate are discussed. The performance of the two reactors varied seasonally. The average algal productivity in the raceway was 32.4 ± 33.1 mg TSS·L−1·d−1 (8.2 ± 8.5 g TSS·m−2·d−1) while in the PBR it was 25.6 ± 26.8 mg TSS·L−1·d−1; the average nitrogen removal was 20 ± 29% (maximum 78%) and 22 ± 29% (maximum 71%) in the raceway and in the column, respectively. Nevertheless, nitrification had a key role as 61 ± 24% and 52 ± 32% of the nitrogen load was oxidized in the raceway and in the column, respectively.

Pizzera, A., Scaglione, D., Bellucci, M., Marazzi, F., Mezzanotte, V., Parati, K., et al. (2019). Digestate treatment with algae-bacteria consortia: A field pilot-scale experimentation in a sub-optimal climate area. BIORESOURCE TECHNOLOGY, 274, 232-243 [10.1016/j.biortech.2018.11.067].

Digestate treatment with algae-bacteria consortia: A field pilot-scale experimentation in a sub-optimal climate area

Marazzi, F;Mezzanotte, V;
2019

Abstract

This paper addresses the efficiency of a microalgae-based agricultural digestate treatment at pilot-scale in an outdoor raceway pond (880 L, pH-dependent CO2 dosage) and in a bubble column (74.5 L, air-bubbling). Specifically, nitrogen removal, evolution of the algae-bacteria consortium, and the actual process applicability in the Po Valley climate are discussed. The performance of the two reactors varied seasonally. The average algal productivity in the raceway was 32.4 ± 33.1 mg TSS·L−1·d−1 (8.2 ± 8.5 g TSS·m−2·d−1) while in the PBR it was 25.6 ± 26.8 mg TSS·L−1·d−1; the average nitrogen removal was 20 ± 29% (maximum 78%) and 22 ± 29% (maximum 71%) in the raceway and in the column, respectively. Nevertheless, nitrification had a key role as 61 ± 24% and 52 ± 32% of the nitrogen load was oxidized in the raceway and in the column, respectively.
Articolo in rivista - Articolo scientifico
Digestate; Microalgae-bacteria consortium; Nitrification; Nitrogen removal; Raceway pond;
Digestate; Microalgae-bacteria consortium; Nitrification; Nitrogen removal; Raceway pond
English
2019
274
232
243
none
Pizzera, A., Scaglione, D., Bellucci, M., Marazzi, F., Mezzanotte, V., Parati, K., et al. (2019). Digestate treatment with algae-bacteria consortia: A field pilot-scale experimentation in a sub-optimal climate area. BIORESOURCE TECHNOLOGY, 274, 232-243 [10.1016/j.biortech.2018.11.067].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/217565
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