scholarly journals A novel three-stage bioreactor for the effective detoxification of sodium dodecyl sulphate from wastewater

2017 ◽  
Vol 76 (8) ◽  
pp. 2167-2176 ◽  
Author(s):  
P. S. Ambily ◽  
Sharrel Rebello ◽  
K. Jayachandran ◽  
M. S. Jisha
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Sodium Dodecyl Sulphate ◽  
Anionic Surfactants ◽  
Low Cost ◽  
Sodium Dodecyl ◽  
Oxygen Demand ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Continuous Treatment ◽  
After Effects

Anionic surfactants like sodium dodecyl sulphate (SDS), due to its extensive disposal to water bodies cause detrimental effects to the ecosystem. Among the various attempts to reduce the after effects of these toxicants, microbial induced bioremediation serves as a promising strategy. The current study aimed to develop a three stage bioreactor to remediate anionic surfactants in wastewater using effective bacterial isolates. Screening of effective SDS biodegraders led to isolation of Pseudomonas aeruginosa (MTCC 10311). Treatment of synthetic effluent with an immobilized packed bed reactor at a flow rate of 5 mL h−1 resulted in 81 ± 2% SDS eliminations and 70 ± 1% reduction in chemical oxygen demand (COD) in five cycles (6 h per cycle). The hydraulic retention time of the reactor was found to be 6 h. Combinatorial usage of a three stage bioreactor, involving aeration, adsorption with low cost scrap rubber granules and treatment with immobilized Pseudomonas aeruginosa, successfully reduced SDS concentrations and COD of wastewater to 99.8 ± 0.1% and 99 ± 1%, respectively, in 18 h by continuous treatment. Half-life of the three stage bioreactor was 72 h. In addition to reducing the surfactant concentrations, this novel bioreactor could resolve the surfactant associated foaming problems in treatment plants, which make it more unique.

Bioconversion of Sodium Dodecyl Sulphate to Rhamnolipid by Pseudomonas aeruginosa: A Novel and Cost-Effective Production Strategy

2012 ◽  
Vol 169 (2) ◽  
pp. 418-430 ◽  
Author(s):  
Sharrel Rebello ◽  
Aju K. Asok ◽  
Sunil V. Joseph ◽  
Biljo V. Joseph ◽  
Leny Jose ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Sodium Dodecyl Sulphate ◽  
Sodium Dodecyl ◽  
Cost Effective ◽  
Production Strategy

Preparation and characterization of nano-filtration and its photocatalytic abilities via pre-coated and self-forming dynamic membranes developed by ZnO, PAC and chitosan

2019 ◽  
Vol 80 (12) ◽  
pp. 2273-2283
Author(s):  
S. Mona Mirmousaei ◽  
Majid Peyravi ◽  
Mohammad Khajouei ◽  
Mohsen Jahanshahi ◽  
Soodabeh Khalili
Keyword(s):  
Wastewater Treatment ◽  
Uv Light ◽  
Low Cost ◽  
Sodium Dodecyl ◽  
Oxygen Demand ◽  
Hot Water ◽  
The Self ◽  
Natural Material ◽  
Photocatalytic Ability ◽  
Dynamic Membranes

Abstract In the current work, novel dynamic membranes (DM) were tested and introduced for cheese whey wastewater treatment based on resistant and inexpensive materials, polyesters, and chitosan. For the investigation of dynamic membrane (pre-coated and self-forming) characterizations, polyester as a low-cost and natural material with chitosan were chosen to provide the support of the target membrane. The inherent antifouling character of chitosan accompanied by its high hydrophilicity have made this polymer known as an attractive agent for membrane-based wastewater treatment operations. Zinc oxide (ZnO) and powdered activated carbon (PAC) were employed as the dynamic layer. Neat polyester had a chemical oxygen demand (COD) rejection ratio of about 57.61%, but the flux declined sharply. The higher removal efficiency was for the self-forming type: total phosphate (94%) and citrate (95.5%). Fouled dynamic membranes were backwashed by sodium dodecyl-sulphate (SDS), warm water, and distilled water. Results demonstrated that the pre-coated was reduced and fouling increased the flux recovery rate (FRR) (9.1%) while use of the self-forming DM exhibited an aggravation of fouling by decreasing of support FRR (11.1%). It was found that by substitution of deionized water and hot water with SDS, FRR was enhanced. In the following, the photocatalytic ability of the product was investigated. The UV light source increased the removal ratio and FRR. For example, self-forming COD rejection was enhanced (6.63%).

scholarly journals Tannery Wastewater Recalcitrant Compounds Foster the Selection of Fungi in Non-Sterile Conditions: A Pilot Scale Long-Term Test

2021 ◽  
Vol 18 (12) ◽  
pp. 6348
Author(s):  
Francesco Spennati ◽  
Salvatore La China ◽  
Giovanna Siracusa ◽  
Simona Di Gregorio ◽  
Alessandra Bardi ◽  
...  
Keyword(s):  
Oxygen Demand ◽  
Packed Bed ◽  
Pilot Scale ◽  
Packed Bed Reactor ◽  
Tannery Wastewater ◽  
Start Up ◽  
Quebracho Tannin ◽  
Entire Experiment ◽  
Bacteria And Fungi

This study demonstrated that a microbial community dominated by fungi can be selected and maintained in the long-term under non-sterile conditions, in a pilot-scale packed-bed reactor fed with tannery wastewater. During the start-up phase, the reactor, filled with 0.6 m3 of polyurethane foam cubes, was inoculated with a pure culture of Aspergillus tubingensis and Quebracho tannin, a recalcitrant compound widely used by tannery industry, was used as sole carbon source in the feeding. During the start-up, fungi grew attached as biofilm in carriers that filled the packed-bed reactor. Subsequently, the reactor was tested for the removal of chemical oxygen demand (COD) from an exhaust tanning bath collected from tanneries. The entire experiment lasted 121 days and average removals of 29% and 23% of COD and dissolved organic carbon (DOC) from the tannins bath were achieved, respectively. The evolution of the microbial consortium (bacteria and fungi) was described through biomolecular analyses along the experiment and also developed as a function of the size of the support media.

scholarly journals Treatment of Pesticide-Contaminated Water Using a Selected Fungal Consortium: Study in a Batch and Packed-Bed Bioreactor

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 743
Author(s):  
Marcela Levio-Raiman ◽  
Gabriela Briceño ◽  
Bárbara Leiva ◽  
Sebastián López ◽  
Heidi Schalchli ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Alginate Bead ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Continuous Treatment ◽  
Packed Bed Bioreactor ◽  
Inoculum Concentration ◽  
Pesticide Removal ◽  
Pesticide Metabolites ◽  
Fungal Consortium

This study provides the basis for implementing a continuous treatment system for wastewater containing a pesticide mixture formed by atrazine, iprodione, and chlorpyrifos. Two fungal strains (Verticilium sp. H5 and Metacordyceps sp. H12) isolated from a biomixture of a biopurification system were able to remove different pesticide concentrations (10 to 50 mg L−1) efficiently from the liquid medium; however, the half-life of the pesticides was reduced and characterized by a T1/2 of 5.4 to 9.2 d for atrazine, 3.7 to 5.8 d for iprodione, and 2.6 to 2.9 d for chlorpyrifos using the fungal consortium. The immobilization of the fungal consortium in alginate bead was effective, with the highest pesticide removal observed using an inoculum concentration of 30% wv−1. The packed-bed reactor with the immobilized fungal consortium, which was operated in the continuous mode at different flow rates (30, 60, and 90 mL h−1), required approximately 10 d to achieve removal efficiency (atrazine: 59%; iprodione: 96%; chlorpyrifos: ~85%). The bioreactor was sensitive to flow rate fluctuations but was able to recover performance quickly. The pesticide metabolites hydroxyatrazine, 3,5-dichloroaniline, and 3,5,6-trichloro-2-pyridinol were produced, and a slight accumulation of 3,5,6-trichloro-2-pyridinol was observed. Nevertheless, reactor removal efficiency was maintained until the study ended (60 d).

scholarly journals The Adsorption of Anionic Surfactants by Iron(III) and Aluminium Hydroxides

2002 ◽  
Vol 20 (8) ◽  
pp. 757-765 ◽  
Author(s):  
E.A. Streltsova ◽  
E.A. Hromysheva ◽  
A.F. Tymchuk
Keyword(s):  
Adsorption Isotherms ◽  
Sodium Dodecyl Sulphate ◽  
Adsorption Mechanism ◽  
Anionic Surfactants ◽  
Sodium Dodecyl

The adsorption of sodium dodecyl sulphate and sulphanol NP-3 by iron(III) and aluminium hydroxides was studied. The applicability of the Langmuir, Freundlich and Hill–de Boer adsorption equations for the description of the adsorption isotherms obtained experimentally was verified. Values of various parameters characterising the adsorption of the anionic surfactants investigated by iron(III) and aluminium hydroxides have been calculated. These allowed assumptions to be made about the adsorption mechanism. The possibility of using air as an adsorbent for anionic surfactants was studied.

scholarly journals Plant-Microbe Synergism in Floating Treatment Wetlands for the Enhanced Removal of Sodium Dodecyl Sulphate from Water

2021 ◽  
Vol 13 (5) ◽  
pp. 2883
Author(s):  
Momina Yasin ◽  
Muhammad Tauseef ◽  
Zaniab Zafar ◽  
Moazur Rahman ◽  
Ejazul Islam ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulphate ◽  
Sodium Dodecyl ◽  
Oxygen Demand ◽  
Industrial Applications ◽  
Treatment Wetlands ◽  
Aquatic Life ◽  
Acinetobacter Junii ◽  
Degrading Bacteria ◽  
Acinetobacter Sp ◽  
Floating Treatment Wetlands

Excessive use of detergents in wide industrial processes results in unwanted surfactant pollution. Among them, sodium dodecyl sulphate (SDS) has well-known history to be used in pharmaceutical and industrial applications. However, if discharged without treatment, it can cause toxic effects on living organisms especially to the aquatic life. Floating treatment wetlands (FTWs) could be a cost-effective and eco-friendly options for the treatment of wastewater containing SDS. In this study, FTWs mesocosms were established in the presence of hydrocarbons-degrading bacteria. Two plant species (Brachiaria mutica and Leptochloa fusca) were vegetated and a consortium of bacteria (Acinetobacter sp. strain BRSI56, Acinetobacter junii strain TYRH47, and Acinetobacter sp. strain CYRH21) was applied to enhance degradation in a short-time. Results illustrated that FTWs vegetated with both plants successfully removed SDS from water, however, bacterial augmentation further enhanced the removal efficiency. Maximum reduction in SDS concentration (97.5%), chemical oxygen demand (92.0%), biological oxygen demand (94.2%), and turbidity (99.4%) was observed in the water having FTWs vegetated with B. mutica and inoculated with the bacteria. The inoculated bacteria showed more survival in the roots and shoots of B. mutica as compared to L. fusca. This study concludes that FTWs have the potential for the removal of SDS from contaminated water and their remediation efficiency can be enhanced by bacterial augmentation.

Pretreatment of Poultry Processing Wastewater in a Pilot-Scale Anaerobic Filter

1990 ◽  
Vol 22 (9) ◽  
pp. 9-16 ◽  
Author(s):  
S. R. Harper ◽  
C. C. Ross ◽  
G. E. Valentine ◽  
F. G. Pohland
Keyword(s):  
Retention Time ◽  
Low Cost ◽  
Packed Bed ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Packed Bed Reactor ◽  
Processing Plant ◽  
Oil And Grease ◽  
Working Volume ◽  
Poultry Processing

Wastewater from a typical poultry processing plant in the southeastern U.S.A. was treated on site with a pilot-scale anaerobic packed-bed reactor. The reactor had a working volume of 3.2 m3, was filled with 15-cm diameter polyethylene random-pack media, and was operated at 35°C with a retention time of 21 hours and at a loading rate of 2.8 kgCOD/m3d−1. Under these conditions, treatment efficiencies were sufficient to meet typical surcharge-free municipal discharge requirements, with effluent soluble COD of 440 mg/L, soluble BOD5 of 190 mg/L, fats, oil and grease (FOG) of 10 mg/L, and total suspended solids of 140 mg/L. Results from pilot operation are compared to those of previous laboratory-scale studies, where similar results were obtained with less than half of the hydraulic retention time. Differences in treatment on pilot vs. laboratory scale were largely due to differences in wastewater variability and reactor operation. Recommendations for future studies to reduce the costs of treatment, including emphasis on types of low-cost packing, amounts of packing media, and heating requirements are presented.

Sequential UASB and dual media packed-bed reactors for domestic wastewater treatment – experiment and simulation

2016 ◽  
Vol 73 (12) ◽  
pp. 2959-2970 ◽  
Author(s):  
Raúl Rodríguez-Gómez ◽  
Gunno Renman
Keyword(s):  
Wastewater Treatment ◽  
Pathogenic Bacteria ◽  
Oxygen Demand ◽  
Filter Material ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
P Removal

Abstract A wastewater treatment system composed of an upflow anaerobic sludge blanket (UASB) reactor followed by a packed-bed reactor (PBR) filled with Sorbulite® and Polonite® filter material was tested in a laboratory bench-scale experiment. The system was operated for 50 weeks and achieved very efficient total phosphorus (P) removal (99%), 7-day biochemical oxygen demand removal (99%) and pathogenic bacteria reduction (99%). However, total nitrogen was only moderately reduced in the system (40%). A model focusing on simulation of organic material, solids and size of granules was then implemented and validated for the UASB reactor. Good agreement between the simulated and measured results demonstrated the capacity of the model to predict the behaviour of solids and chemical oxygen demand, which is critical for successful P removal and recovery in the PBR.

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