Closing the loop - Recovery of nutrients and energy from wetland biomass

Piotr Banaszuk , Andrzej Kamocki , Agnieszka Jolanta Wysocka-Czubaszek , Robert Czubaszek , Sławomir Roj-Rojewski

Abstract

The aim of our research was to estimate the amount of energy, C, N and P that potentially could be extracted from the plant biomass harvested annually in the Narew National Park (NE Poland). We found that the conversion of biomass through anaerobic digestion (AD) delivers not only power and heat but also ensures the recovery of nutrients and organic matter for their reuse in agriculture. The most productive community with the highest biomass yield was reed bed of Phragmites australis (9.78 ± 1.66 t d.w. ha−1). It was followed by Phalaridetum and tall sedge communities with Carex elata and C. gracilis (6–7 t d.w. ha−1), rushes of Glyceria maxima (3.61 ± 0.63 t d.w. ha−1), and sedge moss communities with C. lasiocarpa (~1 t d.w. ha−1). Annual vegetation management would result in ~33·103 t d.w. of biomass. The primary net energy output was related to the productivity of the vegetation and ranged from ~17 GJ ha−1 for the sedge moss communities to 160 GJ ha−1 for Phragmitetum australis. The methane potential of the studied species was low and varied between 89 Nm3 t−1 d.w. for Phragmites and 188 NL kg−1 d.w. for Glyceria maxima. Consequently, the unit related net gain of energy in CH4 ranged between 23 and 30 GJ ha−1 for the perennial grasses and tall-sedge communities, and 3.5 GJ ha−1 for the low-productivity sedge-moss communities. As a result of low energy inputs for harvesting, the wetland biomass exhibited a favorable energy balance. The annual potential of CH4 for the whole studied valley section was 3286 ± 439·103 m3 resulting in net electricity potential of ~9.1 GWh and waste heat –32.3 TJ. An “average” hectare of wetland could power 1.2 household and provide 1010.4 ± 169.4 kg of C, 117.8 ± 19.6 kg of N, and 11.9 ± 2.0 of P applied do crop soils along with a digestate.
Author Piotr Banaszuk (FCEE / DAEEM)
Piotr Banaszuk,,
- Department of Agri-Food Engineering and Environmental Management
, Andrzej Kamocki (FCEE / DAEEM)
Andrzej Kamocki,,
- Department of Agri-Food Engineering and Environmental Management
, Agnieszka Jolanta Wysocka-Czubaszek (FCEE / DAEEM)
Agnieszka Jolanta Wysocka-Czubaszek,,
- Department of Agri-Food Engineering and Environmental Management
, Robert Czubaszek (FCEE / DAEEM)
Robert Czubaszek,,
- Department of Agri-Food Engineering and Environmental Management
, Sławomir Roj-Rojewski (FCEE / DAEEM)
Sławomir Roj-Rojewski,,
- Department of Agri-Food Engineering and Environmental Management
Journal seriesEcological Engineering, ISSN 0925-8574, e-ISSN 1872-6992, (N/A 100 pkt)
Issue year2020
Vol143
Article number105643
Keywords in EnglishFluviogenous wetland, Nutrients, Energy, Anaerobic digestion
ASJC Classification2305 Environmental Engineering; 2308 Management, Monitoring, Policy and Law; 2309 Nature and Landscape Conservation
DOIDOI:10.1016/j.ecoleng.2019.105643
URL https://www.sciencedirect.com/science/article/abs/pii/S0925857419303672
Internal identifierROC 19-20
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.451; WoS Impact Factor: 2018 = 3.406 (2) - 2018=3.617 (5)
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