The mangrove swamp of Martinique covers an area of approximately 1,800 hectares and represents approximately 6 % of the island's forest area. It is mainly located in the center, on the peninsula of La Caravelle and in the south of the island. The context of Martinique, tropical, insular and volcanic, undoubtedly reinforces the major role of wetlands in the regulation of the water cycle and in particular the mitigation of floods, solids and pollutants transport, and the water resource. Urbanization and certain agricultural practices have been important factors in the abandonment or destruction of wetlands. As protected areas, local authorities regularly monitor the mangroves. This organized tour will enable you to discover this natural wetland and explain their functioning, the factors that can affect their health, and the biodiversity they support.
Taupinière wastewater treatment plant is
designed fo 900 PE, and has been operating since October 2014. Fed by combined
sewer, the treatment plant receives high hydraulic load variations (tropical
events) and has to ensure 125/25/35/10 mg/L for respectively COD/BOD5/TSS/TKN.
The treatment chain is composed of:
1. An
unsaturated/saturated vertical flow system with two beds in parallel (sized at
0.8 m2/PE in total) and fed with raw wastewater by a gravity siphon.
Filters are planted with Heliconia
psittacorum.
2. A
simplified trickling filter (0.13 m²/PE) composed of 1.5 m of pumice stones to
fulfill nitrification. A 20 cm settling zone at the bottom allows bring back
solids to the first stage TW system for sludge storage and mineralization.
The treatment plant has been monitored during ATTENTIVE
research program during the 4 first years of operation.
Rum distilleries produce an acidic, highly concentrated effluent (COD in excess of 20,000 mg/L) that is deficient in nitrogen. La Mauny distillery invested in a new treatment plant for 36,000 m3 of stillage per year. In operation since 2023 it is composed of a Sequenced Batch Reactor and 4,800 m2 of vertical flow treatment wetlands. Vertical flow TW aims at separate the sludge from treated wastewater, produce an additional treatment of dissolved pollutants and treat the sludge over years. The filters are planted with Echinocloa.
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