# Seasonal Variability in Wupa WWTP Efficiency — Iheukwumere et al. (2021)

**Citation:** Iheukwumere, S.O., Phil-Eze, P.O. & Nkwocha, K.F. (2021). Seasonal Variability and Wastewater Treatment Efficiency in Federal Capital Territory, Abuja. *International Journal of Environmental Chemistry*, 5(2), 31–37. DOI: https://doi.org/10.11648/j.ijec.20210502.13

**Link:** https://www.sciencepg.com/article/10.11648/j.ijec.20210502.13

**Relevant quotes / tables:**

> "The result obtained show that in 2015 a high reduction in biochemical oxygen demand (BOD) (84.6%) and chemical oxygen demand (COD) (85.4%)... In 2016... BOD (93.4%)... COD (87.6%)... In 2017, the level of treatment for BOD, COD and TSS were 97.2%, 95.7% and 95.4% respectively. While in 2018, removal efficiency of BOD was 95.2%, COD 91.6% and TSS 90.6%."

Annual BOD/COD removal efficiencies at Wupa:

| Year | BOD removal % | COD removal % |
|------|---------------|---------------|
| 2015 | 84.6 | 85.4 |
| 2016 | 93.4 | 87.6 |
| 2017 | 97.2 | 95.7 |
| 2018 | 95.2 | 91.6 |

> "...the BOD total in dry season is significantly higher compared to the rainy season..."

**What it feeds:**
- Multi-year treatment-efficiency benchmark for Abuja domestic wastewater.

**Confidence:** Medium — operational data over four years; plant-specific.

**Limitations:** Influent/effluent absolute concentrations not provided.