Related Experiment Video
Updated: Feb 1, 2026

Biofilm Removal Using Carbon Dioxide Aerosols without Nitrogen Purge
Published on: November 6, 2016
Adding maize cobs to vertical subsurface flow constructed wetlands treating marine recirculating aquaculture system
Meng Li1, Linlin Sun1, Xiefa Song1
1Fisheries College, Ocean University of China, Qingdao 266001, China.
Abstract:
This study aims to investigate the releasing behaviors of maize cobs with or without alkali (i.e. NaOH) pretreatment in seawater and distilled water, and to evaluate the effects of maize cobs addition (solid biomass and lixivium) on nitrogen removal in saline constructed wetland (CW) treating marine recirculating aquaculture system (RAS) effluents. Results revealed NaOH-treated maize cobs released carbon more efficiently, whether in seawater or in distilled water. Compared to distilled water, seawater conditions promoted carbon releasing. CW with maize cobs biomass and lixivium addition had high NO3-N removal efficiencies without significant difference, i.e. 94.9 ± 6.0% and 87.1 ± 13.2%, respectively. While CW with maize cobs biomass addition had higher effluent COD concentrations (16.3 ± 3.6 mg L-1) compared with those adding lixivium (2.1 ± 0.4 mg L-1). The study suggested adding maize cobs lixivium to be feasible and effective way to enhance nitrogen removal in saline CW.
Related Concept Videos
The Nitrogen Cycle
Kinetic Energy
Enzyme Kinetics
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy
The Carbon Cycle
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...

