Efficiency of Cerium Nitrate and Hydrogen Peroxide in Removing Ammonia and Nitrite from Aquaculture Wastewater and Its Impact on Microbial Community Dynamics

Water, Journal Year: 2024, Volume and Issue: 16(24), P. 3601 - 3601

Published: Dec. 14, 2024

Aquaculture wastewater is rich in nutrients such as nitrogen and phosphorus. If discharged directly without treatment, it can cause eutrophication of water bodies the proliferation algae. This study explores treatment aquaculture using cerium nitrate hydrogen peroxide. To improve efficiency ammonia nitrite wastewater, a Box–Behnken design with three factors at levels was used to optimize process treating The optimal conditions for removing were determined be Ce(NO3)3 dosage 0.18 g/L, an H2O2 reaction concentration 1.0%, time 30 min. Under conditions, degradation rate reach 80% or more. Finally, high-throughput sequencing technology explore impact peroxide on microbial community structure metabolic pathways. results showed that, phylum level, dominant positions Actinobacteriota, Proteobacteria, Bacteroidota maintained throughout entire culture period. At genus relative abundance hgcI_clade under Actinobacteriota significantly increased, becoming main condition adding peroxide, functions enhanced. addition increased key metabolism genes amo, hao, nap, thereby enhancing potential nitrification/denitrification capabilities microorganisms. combination positive effects providing new strategy green wastewater.

Language: Английский

Air Gap Membrane Distillation for Concurrent Ammonia and Phosphate Recovery from Marine Culture Wastewater for Improved Water Reclamation

Published: Jan. 1, 2024

Valuable nutrients such as ammonium and phosphate exist in teensy concentrations marine-culture wastewater (MCW), causing their recovery challenging with inefficient conventional methods. Air gap membrane distillation (AGMD) is systematically explored for the first time to simultaneously recover pure water from low-nutrient MCW. This study assessed performance of AGMD resource by conducting a thorough investigation optimization various parameter conditions, including temperature difference, feed pH, air width, spacer flow rate. Lowering pH substantially improved both ammonia rejection owing prohibited ionized NH4 being liberated into gaseous NH3. Moreover, it mitigates fouling, prolongs lifespan, potentially produces liquid fertilizer. Sustaining high temperatures rates, alongside reducing resulted enhanced flux. Under optimized retentate solution exceeded 97% 99.9%, respectively. Pure flux 7 Kg/m2h while concentration permeate remained <0.23 mg/L (ammonia) <0.015 (phosphate). The system offers an innovative treating MCW enhancing simultaneous resources.

Language: Английский

Hybrid membrane process for nutrient recovery and sodium reduction in aquaculture wastewater

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(6), P. 114665 - 114665

Published: Nov. 5, 2024

Language: Английский