Impact of the Municipal Solid Waste Typology on Leachate Flow under Semi-Arid Climate – A Case Study

Abstract

As recently created, the landfill site of Oujda, Morocco receives an annual flow of municipal solid wastes of 140000 tons. It became clear that the leachate storage ponds were undersized compared to the actually emanating flows. With no adequate treatment, the storage time of leachates in deep and anaerobic ponds increase and produce olfactory nuisances directly affecting the air quality of the nearest agglomerations. The monitoring of leachate flows during a year, showed the daily average production of 126 m 3 (annual cumulative leachate is 46800 m 3). Thus, highest volumes were recorded during the summer season (4716 m 3 in July 4945 m 3 in August, and 4927 m 3 in September) with a monthly average rate of 3700 m 3. In addition, the monitoring of leachate flows exhibits seasonal variations. Simultaneously, the MSW's typology and moisture content study showed the dominance of organic matter (73%) and high moisture content (63.5%). The results obtained are an essential asset for any decision in order to achieve appropriate leachates treatment with a possibility of recirculation into the landfill cells to enhance removal of their toxic contents.

Critical review for the quantification of leachate production: Evaluation example for the “Oum Azza” public landfill in Rabat city, Morocco

“…The last parameter is significant since waste in Morocco has very high moisture, between 60% and 75% (Soudi & Chrifi, 2007). A study carried out in the landfill of Oujda city showed that the moisture of the waste received reached an average rate of 63.5% (Arabi et al., 2020). At the same time, Chiguer et al.…”

Solid waste management: Case of the cities of Rabat, Sale, and Temara

“…Urban expansion and the development of Morocco's socioeconomic activities induce a gradual increase in solid waste (Bakraouy et al, 2017). The amount of waste has been estimated at 6.9 million tons/year, equivalent to 0.76 kg/inhab/day in urban areas and 0.3 kg/inhab/day in rural areas (Arabi et al, 2020;Hasib et al, 2020).…”

Food Waste reuse as a feed for organic chicken: A case study

“…In which the proportion of putrescible fraction mainly dominated by Food Waste is on average 74% and reaches 77% during the summer season. Unfortunately, this waste is landfilled instead of being recycled, aggravating the negative impact of its treatment within the landfill cells due to its high humidity of 64% [7].…”