Technological Solution for the Treatment of Wastewater Resulting from Autochthonous Aquacultures in Order to Protect the Marine Water Quality

Abstract

This paper depicts the research conducted at a micro-pilot scale on autochthonous cultures in order to develop adequate technological solutions for the treatment of wastewater resulting from shrimp cultures (Palaemonidae) that would ensure the protection of the Black Sea ecosystem and constitute an applicable tool for the development of aquaculture in Romania. The proposed objectives were attained by adopting an integrated system of marine cultures shrimps-mussels-macrophyte algae, followed by a conventional chemical treatment step using aluminium sulphate recovered from metallurgical slags. This system together with wastewater treatment ensures an optimum development of species and a minimum load of pollutants in the aquatic environment.

Recent advances in Shrimp aquaculture wastewater management

“…In an integrated culture involving shrimp cum mussel cum aquatic macrophyte algae in Romania, higher efficiencies in the removal of pollutants were clearly demonstrated by the algae. In specific terms, 29%, 79%, 76% and 99% of COD, suspended matter, total nitrogen and total phosphorus were removed respectively (Tociu et al, 2017). The benefits of using aquatic plants in the treatment of shrimp wastewater go beyond the success in pollutant removal.…”

Simple and Combined Acidic Extraction of Phosphorus from Sewage Sludge Ash

“…It is well-known that the sewage sludge is the main waste produced by the municipal wastewater plants. During the wastewater treatment process, the pollutants from the aqueous phase are transferred into the sludge that is characterized by high organic loading, pathogenic germs and metals [1]. Besides the organic loading, the sludge contains the nutritive elements based on phosphorous, nitrogen and potassium that recommended it as an organic fertilizer [2].…”