Table 2.
Salmonella load and chemical and physical characteristics of the reclaimed urban wastewater used and recommended range for irrigation use.
| Parameter | Reclaimed urban wastewater | Recommended range |
|---|---|---|
| Salmonella spp., CFU/g | No detected | 0 a |
| pH | 7.54 | 6.5–8.4a |
| Electrical conductivity at 20°C, μS/cm | 845 | <700a |
| Total dissolved solids 180°C, mg/L | 432 | <1,000b |
| Sodium adsorption ratio (SAR), meq/L | 3.9 | 3÷9b |
| Ammonium Nitrogen, mg/L N-NH4 | 1.2 | <15 a |
| Nitrate Nitrogen, mg/L N-NO3 | 5.1 | <5.0a |
| Total Nitrogen, mg/L N | 9.1 | <5.0 a |
| Phosphorus, mg/L P | 1.7 | <2.0 a |
| Chlorine, mg/L Cl | 149 | <100a |
| Fluoride, mg/L F | 0.22 | 1÷15b |
| Sodium, mg/L Na | 138 | <70 a |
| Potassium, mg/L K | 19.1 | – |
| Magnesium, mg/L Mg | 10.9 | – |
| Calcium, mg/L Ca | 77.6 | – |
| Aluminium, μg/L Al | 0.039 | 5,000÷20000b |
| Arsenic, μg/L As | 0.005 | 100÷2000b |
| Boron, μg/L B | 0.1888 | 750÷2000b |
| Cadmium, μg/L Cd | 0.005 | 10÷50b |
| Chromium, μg/L Cr | 0.005 | 100÷1000b |
| Iron, μg/L Fe | 0.031 | 5,000÷20000b |
| Manganese, μg/L Mn | 0.0095 | 200÷10000b |
| Mercury, μg/L Hg | 0.0005 | <1 b |
| Nickel, μg/L Ni | 0.005 | 200÷2000b |
| Lead, μg/L Pb | 0.005 | 5,000÷10000b |
| Copper, μg/L Cu | 0.005 | 200÷5000b |
| Vanadium, μg/L Va | 0.005 | 100÷ 1000b |
| Zinc, μg/L Zn | 0.319 | 2000÷10000b |