Aerated rock filter as a polishing unit for total nitrogen & phosphorus removal from domestic wastewater part 1

Hamdan, Rafidah (2012) Aerated rock filter as a polishing unit for total nitrogen & phosphorus removal from domestic wastewater part 1. Other thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Nitrogen removal from wastewater often requires a highly cost of chemical treatment to prevent over loading of nutrient in effluent discharge to the surface water body. Therefore, in this study a pilot-scale vertical aerated rock filter (VARF) was principally design to remove total nitrogen fiom domestic wastewater. The influence of aeration flow rate at different filters depth has been studied. Wastewater from UTHM wastewater treatment plant has been collected to operate the VARF in the FKAAS Environmental Laboratory. Throughout the experimental period, the VARF influent and effluent samples have been sampling and analyzed for total nitrogen, ammoniacal nitrogen (AN), BOD5, COD, TSS, turbidity, DO and pH for to monitor the filter effectiveness. From this study, it was indicated that most of ammoniacal nitrogen were converted to nitrate-nitrogen in the highly aerated VARF system. However, the rate was influenced by the airflow aeration rate. More than 90% of AN were converted to NO3-N in the system at the filter depth of 0.75m and 1.0 m. Results fiom this study shows that at the filter depth 0.75m and air flow rate of 10 Llmin has efficiently remove 50.4%, 51.9%, 74.7%, 99.2%, 96.2%, and 97.1% of COD, BOD5, total nitrogen, ammoniacal nitrogen, TSS, and turbidity respectively compared to the air flow rate of 20 Llmin at the same filter depth which is remove 42%, 72.1%, 54%, 95.1%, 92.4%, and 83.5% of COD, BOD5, total nitrogen, ammoniacal nitrogen, TSS, and turbidity respectively. For pH and DO profiles, the effluent values was found to be higher at the air flow rate of 10 Llmin, which is range between 8.4 t0~~9a.5nd 7.6, 8.3 and 8.5 mg/L respectively. Meanwhile at air flow rate of 20 Llmin is about 8.2 to 8.4 and 7.3, 8.1 and 7.0 mg/L respectively. By complying with Malaysian Environment Quality (sewage) Regulations 2009, the sample treated for all parameters are within permissible limit of standard B.

Item Type:Thesis (Other)
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD511-780 Sewage collection and disposal systems. Sewerage
Divisions:Faculty of Engineering Technology > Department of Civil Engineering Technology
ID Code:5582
Deposited By:Normajihan Abd. Rahman
Deposited On:22 Jun 2014 09:39
Last Modified:22 Jun 2014 09:39

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