Analysis of Different Methods for Reclamation of Nitrogen and Phosphorous from Sewage Lagoons

Authors

  • Edwin Morara Author

DOI:

https://doi.org/10.66055/c8849z17

Abstract

The need for better nutrient management
has spurred efforts towards more
comprehensive recycling of nutrients
contained in sewage lagoons to
agriculture. Research in this direction has
intensified throughout the past years,
continuously unfolding new knowledge
and technologies. The present review
aspires to provide a systematic synthesis
of the field by providing an accessible
overview of terminology, recovery
pathways and treatment options, and
products rendered by treatment. Our
synthesis suggests that, rather than
focusing on a specific recovery
pathway or product and on a limited set
of nutrients, there is scope for exploring
how to maximize nutrient recovery by
combining individual pathways and
products and including a broader range
of nutrients. The research aimed at
reclaiming two useful plant nutrients from
sewage sludge, which were nitrogen and
phosphorous. Nitrogen was reclaimed
from sewage sludge through the Kjeldahl
method and phosphorous though
chemical precipitation and digestion
methods. The two were then analyzed for
trace metals using X-ray fluorescence
spectroscopy (XRF) and their functional
groups using Fourier transform infrared
spectroscopy (FTIR). The results found the
nitrogen sample to contain 57.91% of
ammonia which was greater compared to
the phosphorous sample which contained
27.44% of phosphoric acid. All the

samples were found to contain a lot of
impurities as they had high concentration
content of up to more than 80% of
compounds such as sulfur trioxide and
magnesium oxide. In conclusion,
reclamation of both nitrogen and
phosphorous from sewage sludge was no
pure as expected due to presence of
impurities.
Key words: wastewater, nitrogen,
phosphorus, reclamation

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Author Biography

  • Edwin Morara

    Department of Mathematics & Physical Sciences

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Published

2026-06-11