scholarly journals A novel textile wastewater treatment using ligninolytic co-culture and photocatalysis with TiO2

2018 ◽  
Vol 23 (3) ◽  
pp. 437-464 ◽  
Author(s):  
Andrea Blanco-Vargas ◽  
Christian Fernando Ramírez-Sierra ◽  
Marcela Duarte Castañeda ◽  
Milena Beltrán-Villarraga ◽  
Luz Karime Medina-Córdoba ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Dye Adsorption ◽  
Color Removal ◽  
Sequential Treatment ◽  
Toxicity Tests ◽  
Secondary Treatment ◽  
Tertiary Treatment ◽  
Effluent Waste

Textile industries produce effluent waste water that, if discharged, exerts a negative impact on the environment. Thus, it is necessary to design and implement novel waste water treatment solutions. A sequential treatment consisting of ligninolytic co-culture with the fungi Pleurotus ostreatus and Phanerochaete crhysosporium (secondary treatment) coupled to TiO2/UV photocatalysis (tertiary treatment) was evaluated in the laboratory in order to discolor, detoxify, and reuse textile effluent waste water in subsequent textile dyeing cycles. After 48 h of secondary treatment, upto 80 % of the color in the waste water was removed and its chemical and biochemical oxygen demands (COD, and BOD5) were abated in 92 % and 76 %, respectively. Laccase and MnP activities were central to color removal and COD and BOD5 abatement, exhibiting activity values of 410 U.L-1 and 1 428 U.L-1, respectively. Subjecting waste water samples to 12h of tertiary treatment led to an 86 % color removal and 73 % and 86 % COD and BOD5 abatement, respectively. The application of  a sequential treatment for 18 h improved the effectiveness of the waste water treatment, resultingin 89 % of color removal, along with 81 % and 89 % COD and BOD5 abatement, respectively. With this sequential treatment a bacterial inactivation of 55 % was observed. TiO2 films were reused continuously during two consecutive treatment cycles without thermic reactivation. Removal percentages greater than 50 % were attained. Acute toxicity tests performed with untreated waste water led to a lethality level of 100 % at 50 % in Hydra attenuata and to a growth inhibition of 54 % at 50 % in Lactuca sativa. Whereas sequentially treated waste water excreted a 13 % lethality at 6.25 % and aninhibition of 12 % at 75 % for H. attenuata and L. sativa, respectively. Finally, sequentially treated waste water was reused on dyeing experiments in which 0.86 mg.g-1 adsorbed dye per g of fabric, that is equivalent to 80 % of dye adsorption.

Cellulose based electrospun nanofilters: perspectives on tannery effluent waste water treatment

Cellulose ◽  
2022 ◽  
Author(s):  
Senthil Rethinam ◽  
Serdar Batıkan Kavukcu ◽  
Thiagarajan Hemalatha ◽  
A. Wilson Aruni ◽  
Aylin Sendemir ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Tannery Effluent ◽  
Effluent Waste

APPLIED OFF-LINE EXPERT SYSTEM FOR EFFLUENT, OPERATIONAL AND TECHNICAL PROBLEMS OF WASTE WATER TREATMENT PLANTS

1994 ◽  
Vol 30 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Gösta Ladiges ◽  
Rolf Kayser
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Knowledge Bases ◽  
Waste Water Treatment Plant ◽  
Technical Problems ◽  
Water Treatment Plants ◽  
Effluent Waste

An off-line expel1 system has been developed and implemented at a nutrient removing waste water treatment plant to provide the operators with knowledge required to run their plant. The system can be started at occurring problems, and for the choice of setpoints for the operation of the plant. It contains knowledge bases for various effluent waste water and technical problems, combining facts and relationships for different chemical, biological and technical processes with models and algorithms. This enables the system to assess situations and give proper advice as well based on facts, experience and calculations. The system is built on a personal computer, and works with a Windows user interface that has been developed in intense co-operation with the plant operators.

The Application of Coagulation and Advanced Oxidation Processes Combined in the Treatment of Tar Water from Biomass Gasification

2015 ◽  
Vol 797 ◽  
pp. 369-376
Author(s):  
Łukasz Gościniak
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Advanced Oxidation Processes ◽  
Waste Water Treatment ◽  
Advanced Oxidation ◽  
Biomass Gasification ◽  
Process Conditions ◽  
Secondary Treatment ◽  
Oxidation Processes ◽  
Coagulation Process

Tar water acquired in the process of biomass gasification has been pre-treated in the process of the standard coagulation. The influence of the dose of chosen coagulants and pH of the running process on the effectiveness of waste water treatment has been specified. The most purified samples underwent a secondary treatment in the process of advanced oxidation with the Fenton's reagent, in order to evaluate its abilities and desirability of this method in the process of a coagulation. The analysis of the process' conditions influence on its effectiveness has been conducted. What is more, the evaluation of the validity of combining the coagulation process with the advanced oxidation in the treatment of tar water coming from the biomass gasification has been made.

Tertiary Waste Water Treatment with Flotation Filters

1990 ◽  
Vol 22 (7-8) ◽  
pp. 139-144 ◽  
Author(s):  
H. J. Kiuru
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Activated Sludge ◽  
Suspended Solids ◽  
Waste Water Treatment ◽  
Medium Size ◽  
Tertiary Treatment ◽  
Reasonable Cost ◽  
High Degree ◽  
Minute Dose

Tertiary waste water treatment has been usually carried out by adding filtration after an activated sludge process, which can be fitted with pre- or simultaneous precipitation for removal of phosphorus. Filtration is operated either as a mechanical unit operation for upgrading the removal of suspended solids only, or as contact filtration where the precipitation of phosphorus is boosted with a minute dose of trivalent iron or aluminium. Instead of using conventional downflow filters, tertiary treatment can also be carried out with flotation filters where flotation is accomplished in the head above the filter, necessary for filtration in any case. The possibility of using flotation between secondary clarification (sedimentation) and filtration, when it is needed, results in a very good load bearing capacity and in a high degree of removal of solids. This means that excellent operational results can be achieved with an almost complete reliability in all operational circumstances at a very reasonable cost. Long experience in Finland from a medium size (30 000 pe) activated sludge plant with simultaneous precipitation fitted with flotation filter tertiary treatment in 1984, shows that values of BOD7 ≤ 5 mg/l, Ptot ≤ 0.3 mg/l NH4-N ≤ 1 mg/l and of suspended solids ≤ 5 mg/l can be continuously achieved, in the treatment of municipal waste water where total nitrification is applied.

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