Abstract: Pollution caused by market wastewater has occurred for many years in Vietnam. In particular, untreated wastewater from a riverside market is often directly discharged into a river, increasing loads of pollutants for the river. Every day, An Cuu market wastewater is averagely discharged about 19 cubic metres into An Cuu river. However, a wastewater treatment system has not been yet built at the market due to many reasons including the lack of investment capital. A Trickling filter (TF) consisting of a fix bed of biochar is a cost acceptable technology, effectively treating parameters like organic pollutants, nutrients and suspended solids. In this study, a model of TF using biochar medium for An Cuu market wastewater treatment were effectively operated with the organic loading rate (OLR) varying from 188 to 550 gBOD5.m-3.day-1 and the hydraulic loading rate (HLR) from 532 to 1899 L.m-2.day-1. The biochar trickling filter showed high removal efficiencies: 97% BOD5, 92% COD, 97% TSS, 66% PTot and 62% NTot.
Key words: An Cuu market, wastewater treatment, biochar trickling filter, Vietnam
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