Bionor sewage sludge technology - Biomass to fertiliser and a soil addition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27730%2F21%3A10250124" target="_blank" >RIV/61989100:27730/21:10250124 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jclepro.2021.128655" target="_blank" >https://doi.org/10.1016/j.jclepro.2021.128655</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jclepro.2021.128655" target="_blank" >10.1016/j.jclepro.2021.128655</a>
Alternative languages
Result language
angličtina
Original language name
Bionor sewage sludge technology - Biomass to fertiliser and a soil addition
Original language description
Wastewater treatment plants play a key role in preserving the resources of the environment, as well as human health. The applied technological system of a wastewater treatment plant determines the efficiency of wastewater and sewage sludge treatment, but also energy efficiency and operating costs. The aim of the presented work is to analyse the technological unconventional system of a small wastewater treatment plant with some modifications generating ecological profits, mainly the fertiliser, biomass or peat substitution ("biosolids factory" concept). The modification of the technological system consists in the application of sewage microfiltration, conditioning of sewage and sludge with cellulose material and application of short-term thermo-composting (Bionor technology). The use of a belt filter for suspension separation reduces the load on activated sludge bioreactors and aerobic stabilisation. The basic modification is the use of thermo-composting of separated sewage sludge with the addition of a structure-forming agent (straw pellet). Importantly, no precipitating or flocculating chemical substances or agents are used in this technology. The technology used enables the processing of sewage sludge into biomass with high fertilising and energy potential. In the following work, the Life Cycle Assessment (LCA) of a wastewater (and sewage sludge) treatment plants was made, comparing different possible concepts of sewage sludge management. The LCA was performed on five applied sewage sludge treatment scenarios: incineration of biomass (S1); biomass as a fertiliser product - "fertiliser substitution" (S2); biomass as a soil addition - "peat substitution" (S3); biomass as both fertiliser and a soil addition - "fertiliser and peat substitution" (S4); and biomass as a filling without any substitution benefits - "no specific use" (S5). The LCA analyses of the Bionor sludge technology applied in the wastewater and sewage sludge treatment plant confirm the environmental benefits and minimise the environmental impact with conventional solutions. The fertiliser and peat substitution scenario cause the least impact on climate change. This scenario was found as beneficial for avoiding net CO2 emissions (MINUS SIGN 5.8 kg CO2 eq/1 m3 wastewater) and eutrophication potential (MINUS SIGN 1.7 to MINUS SIGN 2.0 kg N2O eq/1 m3 wastewater, MINUS SIGN 2.78 to MINUS SIGN 3.0 PO4 eq/1 m3 wastewater). The eco-toxicity study also showed low impact potentials for a land application scenario. Incineration of biomass yields higher environmental impacts than any application scenario (13.8 kg CO2 eq/1 m3 wastewater). The LCA analysis confirmed that the peat substitution scenario was found as the most valuable.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20701 - Environmental and geological engineering, geotechnics
Result continuities
Project
—
Continuities
N - Vyzkumna aktivita podporovana z neverejnych zdroju
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Cleaner Production
ISSN
0959-6526
e-ISSN
1879-1786
Volume of the periodical
319
Issue of the periodical within the volume
2021
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
128655
UT code for WoS article
000724777500007
EID of the result in the Scopus database
—