Abstract:
Due to its complicated composition and high concentrations of pollutants, textile effluent is a
significant cause of pollution. Due to its complicated makeup and high concentration of
contaminants, it has a number of detrimental effects on the environment. In this study, we
sought to establish the ideal ratios of cationic polymer and polyaluminum chloride (PAC) for
the coagulation of textile wastewater. We also looked at the possibility of using cactus as a
natural coagulant for the purification of wastewater. For jar testing, different dosages of PAC
and cationic polymer were used to gauge how well they reduced COD, pH, color, and TSS.
The results showed that COD, pH, color, and TSS were all significantly reduced at an optimal
dosage of 1.2 mg/L for both PAC and cationic polymer. Furthermore, the ideal dosage for TDS
removal was found to be 0.4 mg/L. We can observe that for a dosage of 1.2 mg/L, the removal
efficiencies for COD, Color, pH, TSS, and TS were, respectively, 31.11%, 98.15%, 100%,
98%, and 87.17%. TDS, however, is not eliminated. For a dosage of 4 mg/L, the TDS rises by
at least 46.17%. Cactus was studied as a natural coagulant for textile wastewater treatment in
order to investigate alternate coagulation methods. According to the results of the jar tests,
cactus at its ideal dosage of 20 mg/L substantially reduced TDS, TSS, color, COD, and
turbidity. For pH, the values are random and ranges from 8.05 to 8.22. So, cactus powder was
not effective for pH. For DO, the optimum dosage was 230 mg/l. The dosage with less
concentration just reduced DO. Removal efficiencies for TDS, TSS, DO, and color at an
optimal dose of 20 mg/L are respectively 29.38%, 57%, 77.5% (DO addition), and 21.01%.
However, turbidity and COD rise. The minimum turbidity addition is 20% for dosages under
20 mg/L, while the minimum COD increase is 15% for dosages under 20 mg/L. The pH value
that comes closest to 7 is 8.09 at 230 mg/L. The design of various Effluent Treatment Plant
(ETP) components for the textile washing industry is covered in this thesis paper. A bar screen,
equalization tank, coagulation tank, flocculation tank, primary clarifier, aeration tank, and
secondary clarifier are among the components that were designed. Each component is
specifically created to solve the special difficulties involved in treating textile wastewater. To
attain the target effluent quality, the design integrates the fundamentals of physical, chemical,
and biological treatment procedures. The research's conclusions offer a thorough foundation
for the development and application of an efficient ETP in the textile washing sectors,
eventually promoting environmental sustainability and legal compliance
Description:
Supervised by
Dr. Amimul Ahsan,
Assistant Professor,
Department of Civil and Environmental Engineering (CEE)
Islamic University of Technology (IUT)
Board Bazar, Gazipur, Bangladesh