Nutrients Removal from Aquaculture Wastewater by Biofilter/Antibiotic-Resistant Bacteria Systems

Abstract

The presence of nutrients in aquaculture water bodies causes serious problems for aquatic ecosystems, requiring the development of technical solutions to reduce their amounts. This work identifies some bacterial strains that are able to reduce nutrient quantities and studies the effect of antibiotics on bacterial growth, on the ability to form biofilms on different solid supports, and on the ability to reduce nutrients in aquaculture wastewater. Bacterial biofilm adhesion on different substrates depends on the surface properties of the substrate, on the bacterial types that form the biofilm, but also on biofilm–substrate interactions. The obtained results revealed the high capacity of biofilm-forming bacterial strains of Pseudomonas aeruginosa and Chromobacterium violaceum to eliminate up to 87% of nitrate and nitrite ions and up to 62% of phosphate ions in the presence of concentrations of 0.1–0.4 µg/mL of oxytetracycline antibiotic from aquaculture wastewater.

Bioremediation of Wastewater Using Yeast Strains: An Assessment of Contaminant Removal Efficiency

“…Among these, biological methods are considered to be environmentally friendly and have relatively low operating and implementation costs. In the case of biological treatment, microorganisms such as bacteria, fungi, algae, plants and yeasts are used to remove micronutrients [ 9 , 10 , 11 ], organic compounds [ 10 , 12 ], heavy metals [ 4 , 13 ], etc.…”

Mechanical Filtration Pretreatment Effect on Ammonia Biofiltration Performance Indicators in Fish Aquaculture Wastewater

“…With the rapid development of intensive aquaculture in recirculating systems, its impact on the environment has increased. Therefore, the need to find highly efficient ways to treat the resulting wastewater so that it can be used again has increased (Abdelbary, 2016;Nicula et al, 2022). Wastewater from fish aquaculture poses a major threat to the environment, humans and economic stability.…”

“…Conventional treatment methods, whether physical, chemical or biological, are used to treat wastewater from fish aquaculture. Where the presence of massive quantities of dissolved or suspended materials in this water lead to a lack of fish production and poor water quality, thus increasing the costs of the treatment process (Nicula et al, 2022;Divya, 2015). Treatment in which living organisms, whether plants or animals, are used is called bioremediation, in which hazardous polluting materials are degraded into non-toxic or less toxic materials.…”

“…The most important advantages of biological treatment are that it is less costly, environmentally friendly, and highly efficient in retaining the pollutants to be removed (Liu et al, 2014). Conventional biological treatment methods provide high efficiency and continuous performance in the removal of nitrogen (N) and phosphorous (P) thus, increasing the development of fish aquaculture without the need to increase the demand for water, which is currently suffering from the problem of scarcity (Boxman et al, 2015;Zhimiao et al, 2019;Nicula et al, 2022). Nitrogenous substances are removed through nitrifying and denitrifying processes.…”

“…Nitrogenous substances are removed through nitrifying and denitrifying processes. they are removed from the wastewater of fish aquaculture traditionally by fluidized sand biofilters (FSB), bead filters (BF), Rotating biological contactors (RBC) or trickling filters (TF) (Abdelbary, 2016;Nicula et al, 2022). Ammonia and ammonium are toxic to fish.…”