# Seasonal Methane Emissions from Lagos Solid Waste Disposal Sites — Scientific Reports (2022)

**Citation:** (2022). Seasonal methane emission from municipal solid waste disposal sites in Lagos, Nigeria. *Scientific Reports*, 12, 17923. DOI: https://doi.org/10.1038/s41598-022-22923-5

**Link:** https://preview-www.nature.com/articles/s41598-022-22923-5

**Relevant quotes / tables:**

> "The objective of this study was to determine how seasonal variation influences the CH4 gas emission. The First Order Decay (FOD) Tier 1 Model was used to estimate CH4 emission from four Solid Waste Disposal Sites (SWDS) in Lagos namely: Ewu-Elepe (Ewu), Abule-Egba (A/E), Soluos (Sol), and Olushosun (Olu) covering the dry and wet seasons, respectively for the inventory year 2020."

> "The study revealed that the Degradable Organic Carbon (DOC) for the dry season was 12.897 GgC/kgWaste while that of the wet season was 12.547 GgC/kgWaste."

> "...the methane gas generated during the wet season was 0.331 Gg higher than that of the dry season which was 0.134 Gg for the study period."

Input parameters used:

| Parameter | Value |
|-----------|-------|
| k (dry season) | 0.065 yr⁻¹ |
| k (wet season) | 0.17 yr⁻¹ |
| F (CH4 in landfill gas) | 0.5 |
| R (recovered CH4) | 0 |
| OX (oxidation factor) | 0 |
| MCF | 0.4 |
| DOCf | 0.5 |
| Inventory year | 2020 |

**What it feeds:**
- `ng.waste.msw.landfill.managed` seasonal CH4 emission factors for Lagos.
- DOC and DOCf values for Nigeria-specific wet/dry season model.

**Confidence:** Medium — peer-reviewed, Nigeria-specific FOD Tier 1 application; but uses IPCC default MCF/DOCf and OX = 0.

**Limitations:** DOC value unit in abstract reads "GgC/kgWaste" (likely transcription: should be fraction of degradable organic carbon, or Gg C per Gg waste).