Informatics Publishing Limited

Prayitno ¹, Hadi Saroso ¹, Sri Rulianah ¹, Hardjono ¹

Affiliations
1 Department of Chemical Engineering, State Polytechnic of Malang, Jl. Soekarno Hatta No. 9, Malang 65141, ID

Abstract

Hospital wastewater contains some contaminants such as BOD, COD, phenol and faecal coli, which often exceed the quality standards. The ability of the wastewater treatment can be increased by increasing the hydraulic residence time and the selection of proper types of microorganisms. The purpose of this research is to determine the Aerated Fixed Film Biofilter (AF2B) reactor performance in reducing BOD₅, faecal coli and phenol. The AF2B used in this study is divided into 3 equal parts, where each part contains a biofilter made of plastic with a bee nest shape as medium for the growth of EBC (Endogenous Bacterial Consortium). The endogenous bacterial consortium consists of Pseudomonas capica, Pseudomonas diminuta, Bacillus sp1, and Bacillus sp2. The experiment was conducted by flowing the hospital wastewater continuously into the AF2B reactor through a number of biofilters. At the effluent of AF2B, a part of the stream was recycled to maintain the growth of EBC. The experiments were conducted with the Hydraulic Residence Time (HRT) for 3, 1.5 and 1 hours. The experimental results show that the greater HRT caused the increasing of pollutant removal capability. At HRT for 3 hours and contact time for 98 hours, the BOD₅, faecal coli and phenol removal yields were 92%, 85% and 63%, respectively. These results indicated that AF2B process using EBC can be used as a promising hospital wastewater treatment for BOD₅, faecal coli and phenol removal.

Keywords

Fixed Biofilter Reactor, Hospital Wastewater, Endegeneous Bacterial, Consortium (EBC), Hydraulic Residence Time.

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