Assessing the performance of uv/H2O2as a pretreatment process in TOC removal of an actual petroleum refinery wastewater and its inhibitory effects on activated sludge

2015 ◽  
Vol 93 (5) ◽  
pp. 798-807 ◽  
Author(s):  
Ciro Fernando Bustillo-Lecompte ◽  
Mark Knight ◽  
Mehrab Mehrvar
Keyword(s):  
Activated Sludge ◽  
Petroleum Refinery ◽  
Refinery Wastewater ◽  
Inhibitory Effects ◽  
Toc Removal ◽  
Petroleum Refinery Wastewater

scholarly journals Assessing the performance of a UV/H2O2 process for removing TOC from petroleum refinery wastewater and the respirometric effects of adding UV/H2O2 treated wastewater to activated sludge from the refinery WWTP biological treatment process

2021 ◽  
Author(s):  
Mark Knight
Keyword(s):  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Process ◽  
Petroleum Refinery ◽  
Molar Ratio ◽  
Refinery Wastewater ◽  
Bench Scale ◽  
Treatment Performance ◽  
Petroleum Refinery Wastewater ◽  
Biological Treatment Process

The treatment of petroleum refinery wastewater was studied using a bench scale ultraviolet/hydrogen peroxide (UV/H2O2) process. The highest treatment performance of the bench scale UV/H2O2 process to reduce the total organic carbon (TOC) from the petroleum refinery wastewater took place at a reaction time of 45 min and a pH of 5.0. A three factor analysis of va riance (ANOVA) analysis verified that the initial H2O2/TOC molar ratio did not have a significant effect on the bench scale UV/H2O2 process treatment performance. The effects of adding UV/H2O2 treated petroleum refinery wastewater to activated sludge microorganisms form the refinery WWTP biological treatment process was studied using respirometry. Overall, the UV/H2O2 treated refinery wastewater inhibited the refinery activated sludge microorganisms. This occurred when the raw refinery wastewater was treated with a UV/H2O2 process for 45 min. with an initial H2O2/TOC molar ratio of 1.7 mol H2O2/mol C, an initial H2O2 concentration of 202 mg H2O2/L and a pH of either 5 or 7.

scholarly journals Simulation for the Performance and Economic Evaluation of Conventional Activated Sludge Process Replacing by Sequencing Batch Reactor Technology in a Petroleum Refinery Wastewater Treatment Plant

2019 ◽  
Vol 3 (2) ◽  
pp. 45 ◽  
Author(s):  
Shahryar Jafarinejad
Keyword(s):  
Computer Simulation ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Petroleum Refinery ◽  
Batch Reactor ◽  
Refinery Wastewater ◽  
Conventional Activated Sludge ◽  
Petroleum Refinery Wastewater ◽  
Project Construction

Treatment of the petroleum refinery wastewater containing complex chemicals using biological processes is usually challenging because of the inhibition and/or toxicity of these matters when they serve as microbial substrates. In addition, performance modeling and cost evaluation of processes are essential for designing, construction, and forecasting future economic requirements of the petroleum refinery wastewater treatment plants (PRWWTPs). In this study, the performance and economics of conventional activated sludge (CAS) process replacing by sequencing batch reactor (SBR) technology in a two train PRWWTP were evaluated using simulation. The final treated effluent characteristics for the PRWWTPs containing CAS + CAS and SBR + CAS processes under steady state conditions were studied and evolution of the main parameters of the final effluent during the 30 days of simulation for these plants were investigated. Finally, the total project construction, operation labor, maintenance, material, chemical, energy, and amortization costs of these plants were estimated and compared. Results demonstrated that the project construction cost of PRWWTP containing CAS + CAS processes was lower than that of PRWWTP containing SBR + CAS processes and the energy and amortization costs for both plants were higher in comparison with the operation, maintenance, material, and chemical costs. Note that this study is a computer simulation and drawing general conclusions only on the basis of computer simulation may be insufficient.

scholarly journals Assessing the performance of a UV/H2O2 process for removing TOC from petroleum refinery wastewater and the respirometric effects of adding UV/H2O2 treated wastewater to activated sludge from the refinery WWTP biological treatment process

2021 ◽  
Author(s):  
Mark Knight
Keyword(s):  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Process ◽  
Petroleum Refinery ◽  
Molar Ratio ◽  
Refinery Wastewater ◽  
Bench Scale ◽  
Treatment Performance ◽  
Petroleum Refinery Wastewater ◽  
Biological Treatment Process

The treatment of petroleum refinery wastewater was studied using a bench scale ultraviolet/hydrogen peroxide (UV/H2O2) process. The highest treatment performance of the bench scale UV/H2O2 process to reduce the total organic carbon (TOC) from the petroleum refinery wastewater took place at a reaction time of 45 min and a pH of 5.0. A three factor analysis of va riance (ANOVA) analysis verified that the initial H2O2/TOC molar ratio did not have a significant effect on the bench scale UV/H2O2 process treatment performance. The effects of adding UV/H2O2 treated petroleum refinery wastewater to activated sludge microorganisms form the refinery WWTP biological treatment process was studied using respirometry. Overall, the UV/H2O2 treated refinery wastewater inhibited the refinery activated sludge microorganisms. This occurred when the raw refinery wastewater was treated with a UV/H2O2 process for 45 min. with an initial H2O2/TOC molar ratio of 1.7 mol H2O2/mol C, an initial H2O2 concentration of 202 mg H2O2/L and a pH of either 5 or 7.

Activated Sludge Treatment of Petroleum Refinery Wastewater: Part 1 – Experimental Behaviour

1992 ◽  
Vol 26 (1-2) ◽  
pp. 333-343 ◽  
Author(s):  
A. Baker ◽  
P. Dold
Keyword(s):  
Activated Sludge ◽  
Petroleum Refinery ◽  
Refinery Wastewater ◽  
Constant Flow Rate ◽  
Batch Tests ◽  
Petroleum Refinery Wastewater ◽  
Constant Rate ◽  
Dynamic Simulation Model ◽  
Activated Sludge Systems ◽  
Raw Wastewater

An experimental programme was conducted to provide an initial database for development of a dynamic simulation model for activated sludge systems treating petroleum refinery wastewater. A laboratory scale single reactor aerobic activated sludge system was first operated under constant loading conditions, receiving a feed of petroleum refinery wastewater of fixed COD concentration at a constant flow rate. The steady state system was operated at sludge ages of 10 and 20 days. Data on dynamic response behaviour were obtained by operating the system under a 24 hour cyclic square-wave loading pattern; the system received the same daily influent volume of fixed COD concentration at a constant rate, but over a 12 hour period with no feed over the remainder of the 24 hour cycle. The system was monitored intensively over 24 hour cycles when operated at sludge ages of 5 and 20 days. Batch tests were conducted off-line to establish the decay rate of microorganisms and the potential for volatilization of organics from the raw wastewater. All experimentation was conducted at 20°C.

Current Practice for Treatment of Petroleum Refinery Wastewater and Toxics Removal

1989 ◽  
Vol 24 (3) ◽  
pp. 363-390 ◽  
Author(s):  
P.L. Dold
Keyword(s):  
Activated Sludge ◽  
Current Practice ◽  
Petroleum Refinery ◽  
Individual Treatment ◽  
Refinery Wastewater ◽  
Oil And Grease ◽  
Treatment Technology ◽  
Sulphide Concentration ◽  
Treated Effluent ◽  
Petroleum Refinery Wastewater

Abstract Current practice and experience in the treatment of petroleum refinery wastewater is reviewed briefly, with emphasis on the fate of toxic contaminants. The sources and composition of the wastewater are described in terms of the parameters adopted for evaluating the performance of individual treatment units. The parameters include oil and grease content and sulphide concentration for evaluating the primary treatment units: sour water stripping, API separation and dissolved air flotation (DAF). COD, BOD, suspended solids and “listed” trace contaminant concentrations are considered in the description of biological activated sludge secondary treatment. Current treatment technology achieves a significant reduction in toxic contaminants and other pollutants generated in the petroleum refining process, with the principle reduction occurring in the activated sludge system. The removal mechanisms considered in activated sludge are biological degradation, nitrification, stripping of VOC’s, biosorption, bioaccumulation of heavy metals and heavy metal precipitation. A number of potential problems associated with activated sludge treatment are identified; amongst others, high effluent COD’s, presence of toxic contaminants (at low concentrations) in the treated effluent, inhibition, poor sludge settleability, and waste sludge disposal.

Treatment of Petroleum Refinery Wastewater Using Extended Aeration Activated Sludge

2014 ◽  
Vol 13 ◽  
pp. 1-7 ◽  
Author(s):  
Hayder Gasim ◽  
Abdur Rahman Megat Mohamed Amin Megat ◽  
Rahman Mohamed Kutty Shamsul
Keyword(s):  
Activated Sludge ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Petroleum Refinery ◽  
Oxygen Demand ◽  
Organic Loading Rate ◽  
Refinery Wastewater ◽  
Environmental Aspect ◽  
Mixed Liquor ◽  
Petroleum Refinery Wastewater

The petroleum refinery wastewater biological treatment is widely investigated because of the potential complete mineralization and environmental aspect. In this study, petroleum refinery wastewater was treated in an extended aeration activated sludge (EAAS) reactor A, operated in parallel with EAAS reactor B as a control, fed with municipal wastewater. The chemical oxygen demand (COD) organic loading rate (OLR) of the refinery wastewater in reactor B was approximately 0.057 kg COD/m3·d compared to reactor A of 0.004 kg COD/m3·d throughout the study period. The flowrate for both reactors was maintained at 21.4 L/day. Food to microorganism (F/M) ratio, COD, mixed liquor suspended solids (MLSS), and mixed liquor volatile suspended solids (MLVSS) were monitored throughout the study period. The result indicated high removal efficiency of organic matter of approximately 87% as COD with 2582 mg/L of the petroleum refinery wastewater as influent and 140 mg/L as effluent.

Optimization and Control Petroleum Refinery Wastewater Treatment Systems — Status, Trends and Needs

1989 ◽  
Vol 24 (3) ◽  
pp. 463-477
Author(s):  
Stephen G. Nutt
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Petroleum Refinery ◽  
Control Strategies ◽  
Refinery Wastewater ◽  
Statistical Process ◽  
Petroleum Refinery Wastewater ◽  
Optimization And Control ◽  
And Control ◽  
Wastewater Treatment Systems

Abstract Based on discussions in workshop sessions, several recurring themes became evident with respect to the optimization and control of petroleum refinery wastewater treatment systems to achieve effective removal of toxic contaminants. It was apparent that statistical process control (SPC) techniques are finding more widespread use and have been found to be effective. However, the implementation of real-time process control strategies in petroleum refinery wastewater treatment systems is in its infancy. Considerable effort will need to be expended to demonstrate the practicality of on-line sensors, and the utility of automated process control in petroleum refinery wastewater treatment systems. This paper provides a summary of the discussions held at the workshop.

Online Instrumentation of Petroleum Refinery Wastewater Treatment Plants

1989 ◽  
Vol 24 (3) ◽  
pp. 435-450 ◽  
Author(s):  
J.P. Stephenson
Keyword(s):  
Wastewater Treatment ◽  
Continuous Monitoring ◽  
Wastewater Treatment Plants ◽  
Petroleum Refinery ◽  
Petroleum Industry ◽  
Refinery Wastewater ◽  
Analytical Instruments ◽  
Petroleum Refinery Wastewater ◽  
Sample Characterization ◽  
Industry Wastewater

Abstract Several online analytical instruments are commercially available to allow continuous monitoring of petroleum industry wastewater treatment plants. Satisfactory usage of these instruments requires -special attention for sample preconditioning and sample characterization prior to selection. Specific examples of the available instruments are provided. Effective maintenance of instruments is emphasized.

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