Effect of Zero Water Exchange Systems for Litopenaeus vannamei Using Sponge Biocarriers to Control Inorganic Nitrogen and Suspended Solids Simultaneously

The traditional shrimp farming mode, which mainly uses water exchange to dilute toxic nitrogenous compounds, not only brings risks of disease infections and outbreaks but also results in waste resources has a negative impact on the environment. In this study, zero systems for Litopenaeus vannamei were constructed by using sponge biocarriers with precultured biofilms (SBBFs), effect SBBFs controlling inorganic nitrogen, suspended solids performance L. was determined. experiment consisted four treatments: (1) SBC (control, SB 5% (v/v) + aeration); (2) SBBF2.5a (SBBF 2.5% (3) SBBF5a (4) SBBF5 (v/v)). showed that concentrations TAN NO2−-N SBBF treatments significantly lower than those treatments, while registered higher NO3−-N concentrations. After adsorbates removed regular cleaning regenerate adsorption capacity SBs, turbidity reduced 47.8%~71.5%. grown exhibited mean final weight, survival productivity treatments. This work found use can maintain low levels TAN, improving under strict requirement exchange.