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Sequencing Batch Reactor for the Removal of Nickel from Refinery Wastewater

Mohd Nasohah, Umi Najua Binti Mohd Nasohah (2010) Sequencing Batch Reactor for the Removal of Nickel from Refinery Wastewater. UNSPECIFIED. (Unpublished)

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Abstract

A petroleum refinery is a complex combination of interdependent industrial processes that generate wastewater effluent containing oil, ammonia, sulfides, chlorides, mercaptans, phenols and other hydrocarbons. The most important pollutants are organics, oils, suspended solids and other toxic materials referred to as priority pollutants. 80% of which may be considered hazardous because of the presence of toxic organics and heavy metals. Accidental discharges of large quantities of pollutants can occur as a result of abnormal operation in a refinery and potentially pose a major local environmental hazard. Previous studies have shown the reasonable performance of biological systems in refinery wastewater treatment. Therefore, in this study a Sequencing Batch Reactor (SBR) was studied for treatment of wastewater from equalization tank of PETRONAS Refinery Plant (PPMSB) at Melaka. A 4-litres SBR was fed with real wastewater and seeded with the sludge from same plant. A 12-hour cycle (15,585,60,15 and 45 minute for fill, reaction, settle, draw and idle phases, respectively) was conducted in the SBR for treating 4 litres of wastewater per cycle. Initially the wastewater was characterized and then the influent, effluent and sludge samples were analysed for COD, MLSS, MLVSS and SVI. Next and after acclimatization period, nickel was added to the system in concentrations of 0.1 and 0.2 mg/l to study the efficiency of SBR in treating wastewater contains nickel. Results show the wastewater characteristics of refinery wastewater according to measured parameters which are COD, Nickel, Phosphorus, Nitrate, Turbidity and pH which contains of 322 mg/l, , 2.3 mg/I, 1.80 mg/l, 1.0 mg/l, 79.9 NTU and 6.72 respectively. After going SBR treatment, the result of measured parameters of COD, Nickel, Phosphorus, Nitrate, Turbidity and pH are 29.70 mg/l, 0.017 mg/l, 3.10 mg/l, 15.70 mg/l, 16.80 NTU and 6.95 respectively. The COD and Nickel removal efficiency were achieved approximately 70-90% and 78-80% correspondingly.

Item Type: Final Year Project
Subject: UNSPECIFIED
Divisions: Engineering > Civil
Depositing User: Users 5 not found.
Date Deposited: 05 Jun 2012 08:22
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/2988

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