Pulse Brain · Growing Health Evidence Index
Tier 4 — Narrative / commentaryPeer-reviewed

Microalgae and livestock wastewater - A synergistic approach to environmental management

Sankaran Krishnamoorthy, Ricky Rajamanickam, Rangabhashiyam Selvasembian

The Science of The Total Environment · 2025

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Summary

This review examines the synergistic potential of microalgae cultivation in livestock wastewater treatment systems, where algae simultaneously remediate excess nutrients and generate harvestable biomass. The paper appears to synthesise evidence on how this integrated approach may address both environmental pollution from intensive livestock operations and the recovery of valuable nutrients or animal feed supplements. The work suggests microalgae offer a circular-economy pathway for managing a significant waste stream from pastoral and intensive livestock systems.

UK applicability

Given the UK's intensive livestock sector and increasingly stringent wastewater discharge regulations, microalgae-based treatment could be relevant to farm-scale or catchment-level nutrient management. However, applicability depends on climate suitability for algal growth, capital costs, and integration feasibility with existing farm infrastructure—factors that would require UK-specific validation.

Key measures

As suggested by the title, likely measures include: nutrient (nitrogen, phosphorus) removal rates from wastewater; microalgae biomass productivity; pathogen/contaminant reduction; and bioavailable nutrient content of harvested algal biomass.

Outcomes reported

The study appears to evaluate microalgae-based systems as a dual-purpose approach to livestock wastewater treatment, with potential nutrient recovery and environmental benefit. Specific metrics likely include wastewater quality parameters, nutrient removal efficiency, and microalgae biomass yield.

Theme
Farming systems, soils & land use
Subject
Animal health & welfare
Study type
Narrative Review
Study design
Narrative review
Source type
Peer-reviewed study
Status
Published
System type
Intensive livestock
DOI
10.1016/j.scitotenv.2025.179997
Catalogue ID
SNmok3j5e9-2kel1k

Topic tags

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