Effect of packing material on organic matter removal efficiency in an anaerobic–aerobic baffled bioreactor

2017 ◽  
Vol 39 (8) ◽  
pp. 1032-1040
Author(s):  
Jacobo Tabla-Hernandez ◽  
Edgar Lopez-Galvan
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Packing Material ◽  
Organic Matter Removal

Wastewater Treatment of Wet Coffee Processing in an Anaerobic Baffled Bioreactor Coupled to Microfiltration System

2019 ◽  
Vol 6 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Veymar G. Tacias-Pascacio ◽  
Abumalé Cruz-Salomón ◽  
José H. Castañón-González ◽  
Beatriz Torrestiana-Sanchez
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Total Dissolved Solids ◽  
Transmembrane Pressure ◽  
Organic Matter Removal ◽  
Recalcitrant Organic Matter ◽  
Acidic Wastewater

Background: Wet coffee processing consists of the removal of the pulp and mucilage of the coffee cherry. This process generates a large amount of acidic wastewater which is very aggressive to the environment because of its high content of recalcitrant organic matter. Therefore, treatment is necessary before discharge to water bodies. Because of this reason, this study aimed to evaluate the organic matter removal efficiency in an Anaerobic Baffled Bioreactor (ABR) coupled to a Microfiltration Membrane (MF) system as a new eco-friendly option in the treatment of wet Coffee Processing Wastewater (CPWW). Methods: Two systems (S1 and S2) were evaluated at Hydraulic Retention Times (HRT) of 59 h and 83 h, respectively. Both systems were operated at mesophilic conditions, at a Transmembrane Pressure (TMP) of 50 kPa during 1800 h. Results: The S2 generated higher organic matter removal efficiency, reaching removal values of turbidity of 98.7%, Chemical Oxygen Demand (COD) of 81%, Total Solids (TS) of 72.6%, Total Suspended Solids (TSS) of 100%, and Total Dissolved Solids (TDS) of 61%, compared with the S1. Conclusion: The S2 represents a new eco-friendly alternative to treat CPWW and reduce its pollutant effect.

Polyethersulfone/Cellulose Acetate Butyrate Hybrid Hollow-Fiber Membranes for Organic-Matter Removal From Produced Water

SPE Journal ◽  
2017 ◽  
Vol 22 (05) ◽  
pp. 1478-1486 ◽  
Author(s):  
Shangwen Zha ◽  
Jianjia Yu ◽  
Guoyin Zhang ◽  
Ning Liu ◽  
Robert Lee
Keyword(s):  
Organic Matter ◽  
Cellulose Acetate ◽  
Removal Efficiency ◽  
Hollow Fiber ◽  
Produced Water ◽  
Cellulose Acetate Butyrate ◽  
Hybrid Membranes ◽  
Hollow Fiber Membranes ◽  
Organic Matter Removal ◽  
Acetate Butyrate

Summary In the US, for every barrel of oil, approximately 7 bbl of water is produced. Produced water consists of various amounts of organic and inorganic constituents from the source geologic formation and associated hydrocarbons. Produced-water handling has become a major effort for all waterflood operations. Membrane technology has been widely used for produced-water purification because of its economic and portable properties. However, the presence of organic matter in produced water causes serious membrane fouling, which shortens membrane life and increases operation costs. In this study, to reduce organic components in produced water, we fabricated a series of polyethersulfone (PES)/cellulose acetate butyrate (CAB) hybrid hollow-fiber membranes (HFMs) with different polymer-mass ratio for the removal of organic matter (benzene, toluene, octanoic acid, and hexanoic acid) from produced water. The morphology of the hybrid PES/CAB HFMs was characterized by scanning electron microscope (SEM) and atomic force microscope (AFM). The performance of the hybrid PES/CAB HFMs was evaluated in terms of permeate-water flux (PWF), organic-matter-removal efficiency, flux-decline ratio (FDR), and flux-recovery ratio (FRR). The results revealed that the PES/CAB hybrid HFMs comprised open-ended selective layers with homogeneous CAB distribution. Compared with neat PES HFM, the PES/CAB hybrid membranes exhibited 20.3% improvement of PWF. The organics-removal efficiency was higher than 99.8% for all the membranes. With 1.74 wt% of CAB in PES dope solution, the hybrid membranes possessed the lowest FDR and highest FRR, indicating the excellent antifouling ability of the PES/CAB HFMs. Because of these results, a two-stage antifouling HFM nanofiltration process was proposed as a follow-up work. The PES/CAB hybrid HFMs could serve as an attractive alternative for removing organic matter from produced water.

scholarly journals Organic matter removal from mother liquor of gas field wastewater by electro-Fenton process with the addition of H 2 O 2 : effect of initial pH

2019 ◽  
Vol 6 (12) ◽  
pp. 191304 ◽  
Author(s):  
Yan Wang ◽  
Hui-qiang Li ◽  
Li-ming Ren
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Mother Liquor ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Gas Field ◽  
System Effect ◽  
Organic Matter Removal ◽  
Cod Removal Efficiency ◽  
Initial Ph

The electro-Fenton (EF) process was applied to treat mother liquor of gas field wastewater (ML-GFW). The Fe-Fe electrodes were used and H 2 O 2 was added to the EF system. Effect of initial pH on chemical oxygen demand (COD) removal efficiency, specific electrical energy consumption (SEEC), specific electrode plate consumption (SEPC) and organic matter removal mechanism was investigated. The results showed that COD removal efficiency reached the maximum (71.9%) at initial pH of 3 after reaction for 3 h. Besides, considering with the SEEC and SEPC, pH of 3 was also the best choice, at which SEEC was 4.7 kW h kg COD −1 , SEPC was 0.82 kgFe kg COD −1 . Organic matter removal was achieved by two ways: oxidation and flocculation, and oxidation played a major role. With the analysis of GC-MS, the possible degradation pathways of the representative contaminants in the ML-GFW were given.

scholarly journals THE ANALYSIS OF SEPTIC TANK PERFORMANCE IN REGARD TO SUSPENDED SOLIDS AND ORGANIC MATTER REMOVAL / SEPTIKO VEIKIMO ŠALINANT SKENDINČIĄSIAS IR ORGANINES MEDŽIAGAS ANALIZĖ

2011 ◽  
Vol 3 (5) ◽  
pp. 112-117
Author(s):  
Ala Kirjanova ◽  
Mindaugas Rimeika ◽  
Regimantas Dauknys
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Retention Time ◽  
Biochemical Oxygen Demand ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Septic Tank ◽  
Organic Matter Removal

The aim of this work was to evaluate the removal of suspended solids (SS) and 7-day biochemical oxygen demand (BOD7) in a three chamber septic tank depending on theoretical wastewater retention time and the degree of septic tank cleanliness. It was found out that the performance of the septic tank depended on the degree of its cleanliness: when the septic tank was clean and retention time was three days, SS and BOS7 removal efficiency was 77±10% and 67±14% respectively, whereas two months later, after septic tank desludging, SS removal efficiency decreased to 53±22% and BOD7 to 32±31%. The performance of the septic tank also depended on theoretical wastewater retention time: when some amount of solids was accumulated at the bottom of the septic tank and wastewater retention time was one day, SS and BOS7 removal efficiency was 45±40% and 33±16% respectively; when retention time was three days, SS removal efficiency increased to 53±22% but BOD7removal efficiency remained similar to one day retention time, i.e. 32±31%. Santrauka Bandymų metu buvo įvertintas organinių ir skendinčiųjų medžiagų šalinimas trijų kamerų septike esant vienos ir trijų parų teorinėms nuotekų išbuvimo septike trukmėms bei skirtingam septiko švarumo laipsniui – iš karto po septiko išvalymo, kai jis dar yra švarus, ir praėjus tam tikram laiko tarpui, kai ant septiko dugno yra susikaupęs tam tikras nuosėdų kiekis. Tyrimais nustatyta, kad septiko veikimas priklauso nuo septiko švarumo laipsnio: esant trijų parų nuotekų išbuvimo septike trukmei, vidutinis skendinčiųjų medžiagų (SM) šalinimo efektyvumas buvo 77±10 %, o septynių parų biocheminio deguonies suvartojimo (BDS7) – net 67±14 %, kai septikas buvo švarus, tačiau praėjus dviem mėnesiams nuo septiko išvalymo jo veikimas pablogėjo ir vidutinis SM šalinimo efektyvumas po septiko išvalymo buvo 53±22 %, o BDS7 – 32±31 %. Taip pat nustatyta, kad šalinant teršalus didelę reikšmę turi nuotekų išbuvimo septike trukmė: kai septikas buvo švarus, o nuotekų išbuvimo trukmė trys paros, vidutinis SM šalinimo efektyvumas – 77±10 %, o BDS7 – 67±14 %; sumažinus nuotekų išbuvimo trukmę iki vienos paros, SM šalinimo efektyvumas sumažėjo iki 31±38 %, o BDS7 šalinimo efektyvumas buvo neigiamas.

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