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Cultivation edible after treatment
The main quality characteristics required for reclaimed wastewater are the following:
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Solids absent; |
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Partial removal of main parasites; |
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Removal of dangerous trace elements for the cultivation; |
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Removal of the greater part of bacteria |
The minimum level of treatment, to limit the risk for the health, is the secondary treatment with optimal performances. For particular applications, a filtration process, followed by disinfection, is needed to obtain < 100 Coliforms MPN/100ml. The recommended performances, after secondary treatment, are the following:
|
Parameter |
Recommended value (mg/l) |
|
BOD |
40 |
|
COD |
90 |
|
TDS |
400 |
|
TSS |
20 |
|
Ntot |
10 |
|
NH3 |
7 |
|
Ptot |
5 |
|
Fecal Coliforms* |
105 MPN/100ml |
*The coliforms contents can be notably reduced, if a filtration phase is provided.
