Application of constructed wetland for shrimp pots wastewater treatment in bac lieu province for reuse purpose

Abstract

ABSTRACT

Constructed wetland was used to treat wastewater from saltwater shrimp pond in Bac Lieu province. The study evaluated treatment ability of organic matters and nutrients in the wetland with an area of 400 m2 using native plants such as bulrush (Scirpus littoralis), cypress (Cyperus involucratus) and seagrass (Posidoniaceae). The treatment system combined a biological pond and the wetland with the purpose of reusing effluent for the black tiger shrimp pond with an area of 2000m2, which was also the influent for the treatment system. The influent was kept at a stable level of 200 m3/day, the treatment efficiency of COD, BOD5, NH4+ and TP at the end of main operation period was above 50%. The NH3 concentration (calculated from TAN) represented the amount of non-polar ammonium that is potentially toxic to shrimp in the effluent of the wetland was relatively low (<0.1 mg/L), within the limits specified by the regulation 01-80:2011/BNNPTNT and QCVN 10-MT:2015/BTNMT ensured wastewater reuse purposes.

Keywords: Constructed wetland; Shrimp pond wastewater treatment; Wastewater reuse.