Elimination of the biogenic pollution effects on aquatic environments

Abstract

Intensive water consumption from surface sources leads to debit imbalance and high level of pollution, especially for wastewater discharges, including urban wastewater treatment facilities. Dissolved harmful and organic substances enter a large number of water bodies, which leads to harsh conditions for the survival of the rivers flora and fauna. A demonstrative indicator of environmental troubles is the intensive development of blue-green algae, which are a nutrient medium for cyanobacteria. Their productivity can be limited by hydromechanical capture. It is proposed to use a small-sized mobile vessel with a filter unit using replaceable cartridges and a pump. As a filter material, it is recommended to use crushed reeds. This technical solution allows the environmentally safe disposal of biomass, saturated with phytoplankton and heavy metal ions that are effectively absorbed. An equation of the distribution of concentrations of blue-green algae over the distance measured from the water surface is provided. The calculated data obtained from the proposed dependence allow us to determine the required level of immersion of the suction probes. The optimal time period in days for the operation of filtering units during summer season was revealed.

Evaluation of Biogenic substances concentrations in Kulpė river

“…Taip pat šiai grupei priskirta ir momentinė avarijų, nelaimingų atsitikimų metu pasklidusi tarša. Pagrindiniai šios grupės teršalai: sunkieji metalai, naftos produktai, šarmų ir rūgščių tirpalai bei organinės kilmės medžiagos [7].…”