Introduction W eaving is one of the primary methods of textile production. It involves interlinking a set of vertical threads with a set of horizontal threads.
Weaving loom Conventional loom Air jet loom Water jet loomrapier loom
Water jet loom
Water jet loom Advantage Disadvantage Wide variety of High amount of fiber and yarn wastewater. types. Wastewater Widely used for contaminate with apparel fabrics. oil and sizing Decreasing of agent. noise. Decreasing of damage yarn.
Introduction This sizing agent Polyvinyl alcohol Acrylic Lubricant substances The oily wastes Objectionable odors Undesirable appearance Toxic Limits oxygen transfer
W astewater Treatment inTextile Industry Biological treatment Dissolved air floatation Coagulation-flocculation Membrane process
Coagulation Flocculation Chemical coagulants cause formation of a sludge phase that can be separated by density difference. Major coagulants: Al2(SO4) 3.14H2O (Alum) FeCl3.6H2O Fe2SO4
Electro-coagulation Defined:Similar to Chemical CoagulationDestabilize Charged ParticlesPhysical Removal (Settling)
Electro-coagulation can remove a widerange of pollutants at the same time: suspended solids dyes emulsion organic matters heavy metals
Objective Investigating the efficiency of the method for treatment of wastewater from water jet loom machine by comparison between chemical coa gulation and electrocoagulation.
Method Analysis of wastewater from jet loom machine Chemical coagulation experiment Electrocoagulation experimental
1. Analysis of wastewater from jet loommachine• The weaving wastewater from jet loom machine in Chonburee Province, Thailand was used in this study.• The properties of wastewater to be analyzed were turbidity, suspended solid (SS), total solid (TS), oil content and chemical oxygen demand (COD).
Measurements pH conductrometer turbidimeter
Measurements Dissolved solid and suspended solid
2. Chemical coagulation experiment The influence factors of the chemical coagulation condition Type and amount of coagulant Type and amount of coagulant aids pH Stirring rate
Chemical coagulation ParameterCondition Value10% aq of coagulant (mL) 1.0,2.0,3.0,4.0,5.0 and 6.00.1% aq of coagulant aids 1.0,2.0 and 3.0(mL)pH 4,5,6,7,8, and 9Rapid stirring rate (rpm) 100, 120 and 150Slow stirring rate (rpm) 30,60,90,120,150 and 180
3. Electrocoagulation Experimental
Electrocoagulation parameter Condition ValueElectrode material Al and FeElectric potential (V) 20,25,30 and 35Contact time (min) 30,60,90,120,150 and 180
Results Properties of wastewater from water jet loom machine. Parameter mean SD Standard ValuepH (25oC) 7.5 0.2 5.5-9Turbidity (NTU) 188.7 4.1 -COD (mg/ L) 1601.1 317.5 120SS (mg/ L) 157.0 12.0 <50TS (mg/ L) 2969.0 98.6 <3000Oil content (mg/L) 571.8 64.8 5.0
The influence factors of chemicalcoagulation F-test at 0.05 level of significance. Type and amount of coagulant, type and amount of coagulant aids, pH of solution and stirring rate were affected significantly with the efficiency of turbidity removal.
Effect of type and amount of coagulants 88%( ) 10% w/w aq Aluminum sulfate( ) 10% w/w aq Ferrous sulfate() 10% w/w aq Ferric chloride
Effect of pH
Effect of type and amount of coagulant aids() 10%w/w aq aluminium sulfate + 0.01%w/w aq anionic polymer() 10%w/w aq aluminium sulfate + 0.01%w/w aq cationic polymer
Effect of stirring rate
Effect of stirring rate
The influence factors ofelectrocoagulation F-test at 0.05 level of significance. Electrode materials, Electric potential, and contact time were affected significantly with the efficiency of the turbidity removal.
Effect of electrode materials() Aluminium electrode () iron electrode
The effect of electric potential andcontact time () 20V ()25V ()30V (x)35V
Conclusions The significant influence on the treatment efficiency of chemical coagulation. The type and amount of coagulant The type and amount of coagulant aids Initial of pH Stirring rate
Conclusions The significant influence on the treatment efficiency of electrocoagulation. Electrode material Electric potential Contact time
Optimum condition of chemical coagulation method 10% w/ of aluminum sulphate 80 mL and w 0.01% w/ of cationic polymer 32 mL per 4 L of w wastewater. The mixture solution was rapidly stirred with 120 rpm for 1 min and then slowly stirred with 20 rpm for 20 min. The removal efficiency of turbidity, COD and oil content were 89%, 85% and 71%, respectively.
Optimum condition ofelectrocoagulation method Aluminum electrode with 35 volts and 150 min of contact time. The removal efficiency of turbidity, COD and oil content were 99%, 97% and 87% respectively.
Acknowledgement The authors would like to thank Rajamangala university of Technology Krungthep for the financial support and also grateful to Assist.Prof. Dr. Waraporn Tanakulrangsarn and Assist.Prof. Puangmanee Tantiwong for theirs valuable comments and suggestions. Thank you for your attention