Abstract
The study examined the removal efficiency of upflow anaerobic filter reactor fed continuously with campus domestic wastewater at different hydraulic retention time and wastewater temperature. The reactor was filled with non woven filter materials and operated at hydraulic retention time ranging from 1 to 6 days and wastewater temperature ranging from 20 to 30C. At that operating condition, the result revealed no significant difference for Carbonaceous (COD) and nutrients materials except there was significant production of gas. The result revealed that increase in HRT and wastewater temperature improves removal performance of the reactor. The overall reactor removal efficiency for COD, TN, NH<sub>4</sub><sup>+</sup>-N, NO<sub>3</sub><sup>-</sup>N and TP concentration were 51, 22, 21, 28 and 10% and 61 35, 37, 49 and 27% in the anaerobic and anoxic columns, respectively. The experimental system was capable of instantaneous removal of the carbonaceous, nitrogenous and phosphorous compounds.
Highlights
University campus is one of the most common institutions all over the entire world that uses considerable amount of fresh water and generates substantial amount of wastewater
At longer Hydraulic Retention Time (HRT), the removal of nitrogenous compounds was low in the anaerobic column and this can be attributed to hydrolysis of particulate nutrients respectively (Elmitwalli and Ralf, 2007)
We investigated the influences of the hydraulic retention time and wastewater temperature fluctuations for a typical anaerobic and anoxic filter process to treat the campus domestic wastewater
Summary
University campus is one of the most common institutions all over the entire world that uses considerable amount of fresh water and generates substantial amount of wastewater. The wastewaters from this institution is characterized by low content of nutrients and pathogens (Otterpohl et al, 1999; Jefferson et al, 1999; Eriksson et al, 2002), it can be potentially very polluting and contributes to aquatic and terrestrial environmental pollution. Anaerobic treatment process is an attractive process for the treatment of low strength campus domestic wastewater as it requires less energy for its operation and less excess sludge is produced as compared to the aerobic process. Over the last few decades, several types of anaerobic process have been used to treat wastewaters arising from domestic or industrial. Among them includes the upflow anaerobic filter (Ladu et al, 2012b), anaerobic hybrid (Thanh Tran et al, 2003), Upflow Anaerobic Sludge Blanket (UASB) (Behling et al, 1997; Barbosa and Sant’Anna Jr., 1989), the Anaerobic Sequencing Batch Reactor (AnSBR) (Sung and Dague, 1995; Ng, 1989), Anaerobic Baffled Reactor (ABR) (Langenhoff and Stucky, 2000; Bodik et al, 2003), Anaerobic Migrating
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