The features of MLSW are shown in Table 2. MLSW samples were taken in April 2021 (spring) and October 2021 (fall) to compare COD, TDS, and TOC concentrations. Despite this, no significant seasonal variations were observed. This occurrence suggests that the physical and chemical properties of MLSW have little impact on the amount of waste generated. This was consistent with Hong Kong's and Taiwan's (Fan et al. 2006) studies, in which there was no significant seasonal variation in leachate quality. Seasonal changes in the quantity and quality of wastewater have a different impact in different regions, depending on the seasonal climate/hydrology of the site (Kurniawan et al. 2006; Dezvareh et al. 2023).
Physicochemical properties of MLSW
| . | October 2021 (autumn) . | April 2021 (spring) . |
|---|---|---|
| pH | 7.1 ± 0.3 | 7.8 ± 0.2 |
| COD (mg/L) | 11,640 ± 395 | 10,580 ± 620 |
| TDS (mg/L) | 12,590 ± 125 | 12,010 ± 360 |
| BOD5 (mg/L) | 7,710 ± 140 | 6,930 ± 310 |
| BOD5/COD | 0.66 | 0.65 |
| NH4-N (mg/L) | 2,660 ± 125 | 2,710 ± 155 |
| NO3-N (mg/L) | 26 ± 1 | 33 ± 2 |
| Total Kjeldahl nitrogen (mg/L) | 2,830 ± 6.5 | 2,910 ± 8 |
| Alkalinity (mg/L) | 11,266 ± 391 | 12,059 ± 415 |
| TOC (mg/L) | 9,005 ± 588 | 8,562 ± 492 |
| Electrical conductivity (mS/cm) | 1.34 | 1.78 |
| . | October 2021 (autumn) . | April 2021 (spring) . |
|---|---|---|
| pH | 7.1 ± 0.3 | 7.8 ± 0.2 |
| COD (mg/L) | 11,640 ± 395 | 10,580 ± 620 |
| TDS (mg/L) | 12,590 ± 125 | 12,010 ± 360 |
| BOD5 (mg/L) | 7,710 ± 140 | 6,930 ± 310 |
| BOD5/COD | 0.66 | 0.65 |
| NH4-N (mg/L) | 2,660 ± 125 | 2,710 ± 155 |
| NO3-N (mg/L) | 26 ± 1 | 33 ± 2 |
| Total Kjeldahl nitrogen (mg/L) | 2,830 ± 6.5 | 2,910 ± 8 |
| Alkalinity (mg/L) | 11,266 ± 391 | 12,059 ± 415 |
| TOC (mg/L) | 9,005 ± 588 | 8,562 ± 492 |
| Electrical conductivity (mS/cm) | 1.34 | 1.78 |