scholarly journals Pilot-scale experiments on a hybrid membrane-electrocoagulation system to produced water treatment in a domestic oil reservoir

2020 ◽  
Author(s):  
Yousef Dehghani ◽  
Bizhan Honarvar ◽  
Amin Azdarpour ◽  
Moein Nabipour
Keyword(s):  
Electric Current ◽  
Produced Water ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Treatment System ◽  
Total Hardness ◽  
Oil And Grease ◽  
Experimental Conditions ◽  
Set Up ◽  
Offshore Oil

Abstract The goal of this paper is to design and set up a new hybrid treatment system for purification of Iranian offshore oil company wastewater. The treatment system consists of electrocoagulation, microfiltration and reverse osmosis (RO) sections. Treatment performance is evaluated by measuring electrical conductivity (EC), chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total suspended solids (TSS), total dispersed solid (TDS) oil and grease (O&G), total hardness (TH) and turbidity. Results showed that the maximum removal efficiency of BOD5, COD, TSS, O&G, EC, TH and turbidity were obtained as 94.49%, 92.17%, 88.18%, 80.8%, 89.84%, 86.66% and 71.72%, respectively. DO was increased significantly due to the reduction of BOD, COD and microorganisms. Results showed that the combination of iron and aluminium electrodes can be very effective in removing pollutants. In addition, the use of microfiltration before RO led to a significant reduction in salinity and TDS. Response Surface Methodology (RSM) was used to determine the optimal experimental conditions for COD, BOD5 and turbidity using Design Expert11. RSM results showed that the optimal electric current and time for BOD5 and COD removal is 20A and 300 min, respectively. The optimal electric current and time for turbidity were obtained as 20A and 210 min.

Treatment of oil and grease in produced water by a pilot-scale constructed wetland system using biogeochemical processes

Chemosphere ◽  
2014 ◽  
Vol 103 ◽  
pp. 67-73 ◽  
Author(s):  
Michael J. Pardue ◽  
James W. Castle ◽  
John H. Rodgers ◽  
George M. Huddleston
Keyword(s):  
Constructed Wetland ◽  
Produced Water ◽  
Pilot Scale ◽  
Biogeochemical Processes ◽  
Oil And Grease ◽  
Wetland System

Treatment of Refinery Wastewater with Isolated Biological Aerated Filters: A Pilot-Scale Study

2012 ◽  
Vol 610-613 ◽  
pp. 2332-2341
Author(s):  
Jian Guang Huang ◽  
Li Zhong ◽  
Wen Yu Xie
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Oxygen Demand ◽  
Volume Ratio ◽  
Pilot Scale ◽  
Mean Value ◽  
Operating Conditions ◽  
Water Volume ◽  
High Concentration ◽  
Set Up

A pilot scale biochemical treatment system containing three isolated biological aerated filters, one oil-separation pool and one secondary sedimentation tank was set up and used for high concentration organic waste water treatment. Effect of different operating conditions on Chemical Oxygen Demand (CODCr), sulphides, hydroxybenzene and oil degradation was investigated. And the ways of sulphides removal were also explored. While CODCr, the concentrations of sulphides, hydroxybenzene and oil in the waste water are no more than 1500 mg/L, 800 mg/L, 15 mg/L and 150mg/L, respectively, the system can run stably and the total removal of these pollutants is 88.8%, 98.8%, 96.8% and 91.0% accordingly though hydraulic retention time (HRT) varies from 7.95 hr to 15.90 hr and the air/water volume ratio (AWVR) varies from 12 to 8. Most of the sulphides are removed by Biodegradation with Isolated Biological Aerated Filters. Most of the pollutants are removed in the 1st BAF and about 96.5% by mean value of sulphides transforme into elemental sulfur and only about 2.7% by mean value of sulphides transforme into sulphates.

scholarly journals Electrochemical remediation of industrial pharmaceutical wastewater containing hormones in a pilot scale treatment system

2019 ◽  
Vol 44 (1) ◽  
pp. 40 ◽  
Author(s):  
Ruiter Lima Morais ◽  
Luane Ferreira Garcia ◽  
Emily Kussmaul Gonçalves Moreno ◽  
Douglas Vieira Thomaz ◽  
Laís De Brito Rodrigues ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Pilot Scale ◽  
Artemia Salina ◽  
Treatment System ◽  
Pharmaceutical Wastewater ◽  
Water And Wastewater Treatment ◽  
Treated Effluent ◽  
Low Concentrations ◽  
Water And Wastewater ◽  
Electrochemical Remediation

The elimination of residual drugs from pharmaceutical and domestic sources is a growing concern, as they are able to reach water and soil resources and can present environmental and health risks even in very low concentrations. Traditional water and wastewater treatment systems have not been efficient in the removal of these compounds, evidencing the importance of the development of new remediation methods. In view of the applicability and versatility of electrocoagulation techniques in the removal of pollutants, the aim of this work is to evaluate the parameters:  biochemical oxygen demand (BOD), chemical oxygen demand (COD), color, turbidity, algestone acetophenide (AAc) and estradiol enanthate (EEn) using a pilot treatment system, as well as phytotoxicity and Brine shrimp toxicity. The study showed good removal efficiency, comprising remarkable remediation performance assayed through BOD (61.5%), COD (58.6%), color (83.1%), turbidity (96.7%), AAc (77.0%) and EEn (56.7%) after 30 minutes. For toxicity, raw effluent was considered more phytotoxic for lettuce and cucumber seeds when compared to treated effluent.  The results suggest that the pilot prototype was promising, providing an increase in both the germination potential and the root growth of the seeds (Lactuca sativa and Cucumis sativus) and a significant decrease in the acute toxicity to Artemia salina.

scholarly journals Treatment of Storm Water from Agricultural Catchment in Pilot Scale Constructed Wetland

2021 ◽  
Vol 25 (1) ◽  
pp. 640-649
Author(s):  
Linda Grinberga ◽  
Didzis Lauva ◽  
Ainis Lagzdins
Keyword(s):  
Water Quality ◽  
Constructed Wetland ◽  
Subsurface Flow ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Treatment System ◽  
Storm Water ◽  
Catchment Basin ◽  
Climate Conditions ◽  
Subsurface Flow Constructed Wetland

Abstract Constructed wetlands as a treatment system are widely explored in different climate conditions and established to be effective in pollution removal from water environment. This study aims to demonstrate the performance of pilot-scale subsurface flow constructed wetland for storm water treatment in Latvia. The catchment basin was located in a farmyard of agricultural area and storm water was collected from the impermeable pavements. Storm water was accumulated in an open pond and periodically pumped above the filter part of the subsurface flow constructed wetland. Grab samples were collected once or twice per month at the inlet and outlet of the treatment system during a period of 73 months from year 2014 to 2020. Water quality parameters as nitrate nitrogen (NO3-N), ammonium nitrogen (NH4–N), total nitrogen (TN), orthophosphate phosphorus (PO4-P), and total phosphorus (TP), total suspended solids (TSS), biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) were monitored. Water level at the inlet structure was automatically measured and flow rate was calculated based on the Manning equation for partially filled circular pipes. Results showed the reduction of average concentrations for all parameters during the study period. However, in some sampling cases concentrations increased at the outlet of the treatment system and can be explained by influencing factors of farming and maintenance. The treatment efficiency of NO3-N, NH4-N, TN, PO4-P, TP, TSS, BOD5 and COD concentrations was 17 %, 68 %, 55 %, 78 %, 80 %, 57 %, 80 % and 74 %, respectively. The study site demonstrated a potential to improve water quality in the long term.

scholarly journals Assessment of the Efficacy of Home Remedial Methods to Improve Drinking Water Quality in Two Major Aquifer Systems in Jaffna Peninsula, Sri Lanka

Scientifica ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
W. M. Dimuthu Nilmini Wijeyaratne ◽  
Suvendran Subanky
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Sri Lanka ◽  
Moringa Oleifera ◽  
Oxygen Demand ◽  
Drinking Water Quality ◽  
Total Hardness ◽  
Oil And Grease ◽  
Aquifer Systems ◽  
Leaf Powder

Chunnakam and Vadamaradchi are two major aquifer systems in Jaffna Peninsula, Sri Lanka. This study was performed to compare water quality in the domestic wells in these aquifers and to assess the efficacy of household water treatments for treating contaminated water. Replicate well water samples were collected from each aquifer and pH, dissolved oxygen (DO), conductivity, total dissolved solids (TDS), salinity, temperature, total solids (TS), total hardness (TH), chemical oxygen demand (COD), oil and grease (OG), nitrate N (N), and total phosphate (TP) were measured. The sampled water from the domestic wells was filtered through commercial mineral filter andMoringa oleiferaleaf powder and boiled at 100°C for 10 minutes and the TH, OG, N, and TP were measured. Both OG and N in Chunnakam were significantly higher and the DO were significantly lower than those of Vadamaradchi. TH, N, and OG of some wells exceeded the drinking water quality standards established by Sri Lanka Standards Institution.Moringa oleiferaleaf powder filtration reduced N significantly and filtering through commercial mineral filter reduced OG, TH, and N significantly. Boiling at 100°C could remove TH significantly but may cause significant increase in N which might result in health impacts.

scholarly journals Fe2+ and UV Catalytically Enhanced Ozonation of Selected Environmentally Persistent Antibiotics

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 521
Author(s):  
Andreja Žgajnar Gotvajn ◽  
Ula Rozman ◽  
Teja Antončič ◽  
Teja Urbanc ◽  
Martin Vrabeľ ◽  
...  
Keyword(s):  
Methodological Approach ◽  
Oxidative Degradation ◽  
Oxygen Demand ◽  
Oxidation Potential ◽  
Experimental Conditions ◽  
Black Light ◽  
Consecutive Reactions ◽  
Two Temperatures ◽  
Identify Formation ◽  
Set Up

The aim of the study was to determine oxidation potential of selected persistent, environmentally relevant antibiotics (Amoxicillin, Levofloxacin, and their mixture with Vancomycin) to reduce their environmental emissions. Ozonation (O3) and indirect ozonation at pH 9.5 (O3/pH9.5) were catalytically enhanced by addition of Fe2+ (O3/Fe2+) and photocatalytic ozonation in combination with Fe2+ and UV-A black light (O3/Fe2+/UV) at two temperatures using total organic carbon (TOC) and chemical oxygen demand (COD) to identify formation of by-products. Oxidative degradation followed pseudo-first order consecutive reactions. Initial phase of oxidation was more intensive than mineralisation at 21 and 40 °C: up to 57.3% and 69.2%, respectively. After 120 min mineralization at 21 °C was up to 64.9% while at 40 °C it was up to 84.6%. Oxidation reached up to 86.6% and 93.4% at 21 °C and 40 °C, respectively. The most efficient processes were indirect ozonation at pH 9.5 (O3/pH9.5) (up to 93.4%) and photocatalytic enhanced ozonation with Fe2+ and UV-A black light (O3/Fe2+/UV) (up to 89.8%). The lowest efficiency was determined in experiments with direct ozonation (up to 75.5%). Amoxicillin was the only one completely mineralised. Study confirmed that ozonation with addition of Fe2+ and UV radiation has the potential to improve efficiency of the antibiotic-removal processes. Further experiments varying amounts of Fe2+ and other experimental conditions should be accomplished to set up more general methodological approach for reduction of antibiotics emissions.

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