from waste to fertilizer: case study of an ornamental plant: Valorization dewatered sludge and treated wastewater treatment plants in agriculture

Due to the size of the wastewater treatment plant's discharges plant, it is essential to reuse treated wastewater for irrigation. irrigation. Similarly, the use of of dewatered sludge in composting, given its richness in fertilizing and lower cost than manure. All the physicochemical analyses of the samples (compost, manure and treated wastewater), carried out in the physico-chemical chemical analysis laboratory at the wastewater treatment plant, revealed that the compliance with both Tunisian standards NT 106.20 and NT 106.03. To highlight the effectiveness of the compost, a comparative comparative study of "Geranium" growth was carried out in two two series of pots (the first with compost and the second with cattle manure). cattle manure). Growth monitoring revealed an improvement in internode length, as well as an increase in the number of buds number of buds and flower buds in the plant studied, when it was on compost than on manure. This shows that the addition of dewatered sludge ensures better plant growth than manure.