We hereby declare that this thesis (project) has been done by us under the supervision of Abdullah AL Mamun, Associate Professor of the Department of Textile Technology, Faculty of Engineering, Daffodil International University. We also feel appreciation and wish that our considerable obligation to our supervisor Abdullah Al Mamun, Associate Professor of the Department of Textile Engineering, Daffodil International University, in-depth knowledge and undeniable fascination of our supervisor in the field has impacted us to complete this thesis (project ) report to complete. In addition, we would like to thank Mominur Rahman, Assistant Professor and Head (Head of the Department of Textile Engineering at DIU) for his caring assistance in completing our project report and in addition to other associates and staff of Textile Engineering of Daffodil International University.
The study mainly focuses on the impact of the treatment plant on the garment industry. Waste water can be reused and safely disposed of with a sewage treatment plant (a very new technology in Bangladesh). Specifically, in this study we attempted to describe the basic mechanism and function of the treatment plant.
In this study, we have tried to show the benefits of a Sewage Treatment Plant (STP) for the garment industry and for the environment, it is a must for safe sewage as per environmental law.
Introduction
- Introduction
- Objectives of this study
- Limitations of this study
- Background and Purpose of the Study
This used water is known as sewage and sewage can be treated by a sewage treatment plant (STP). Sewage treatment plant is not available in Bangladesh but only a few private organizations are setting it up in their factories. Among them, the Sewage Treatment Plant in Snowtex Sportswear & Snowtex outerwear is studied here.
The outlet water from the Sewage Treatment Plant is used for various purposes, such as watering the garden, flushing grass in the toilet and reserving for fire emergencies. Difficulty in obtaining accurate measurement and data due to the complex nature of the sewage treatment processes. The sewage treatment plant in Snowtex is fully biological, so the operating costs are very low which we will calculate in data collection.
Function of Sewage Treatment Plant and how it works, only basic ideas will be given here.
Literature Review
- Literature Review
- Advantages
- Disadvantages
- Water reuse facts
No studies have previously been carried out on wastewater treatment plants in the clothing industry. Our article on the study of treatment plants in the finished garment industry has never been published before. The sewage treatment plant is not often used in readymade garments in Bangladesh, so this study can help to reach the industrial authorities for better understanding of this sewage treatment plant.
Since no research has taken place before, this research will help the future researcher to be more practical in the ready-to-wear industry regarding their sewage waste management system. In the future, every readymade garment owner will be more interested in setting up a sewage treatment plant. This type of study is more needed to understand the efficiency of sewage treatment plant.
So, the researchers should approach the ready clothing authorities regarding this type of wastewater management system for industrial purposes. How a wastewater treatment plant can reduce its impact on the environment will be shown here. We get some standard information from internet and books to verify the information and data we got from Snowtex group STP Sewage Treatment Plant.
Improved water quality: Industrial treatment plants help improve water quality by removing pollutants and contaminants, allowing for safe reuse and discharge. Regulatory Compliance: Sewage treatment plants ensure that industries comply with regulations and laws related to sewage discharge, avoiding penalties and fines. Among them, a biological treatment plant is being studied here, as in the Snowtex Group, where we are conducting a study on a treatment plant.
Methodology
- Methodology
- Process flow chart of studied sewage treatment plant
- Specification of the sewage treatment plant in Snowtex Group
- Photos of the Sewage treatment plant of Snowtex Group
- Data collection
- Sewage treatment plant layout
- Description on layout plan
- Description of this sewage treatment plant mechanism
- Mechanism of bacteria
- Mechanism of chlorination
- Standard parameters for STP
- Test report of treated sewage water parameters
- Operating cost of Sewage treatment plant
- Types of bacteria used in this STP
- Nitrosomonas-
- Nitrobacter-
- Pseudomonas-
The research was carried out on a sewage treatment plant inside Snowtex sportswear and Snowtex outerwear. We tried to find out the advantages and disadvantages of this sewage treatment plant in Snowtex. Finally, we tried to find out important data about sewage treatment plant that will help to implement it in other factories.
While collecting data, we have tried to attach authentic data and 100% original according to Snowtex Group STP data and all original sheets are attached here from factory. In the middle section there are four blowers, one large filter, a control room and one reserve tank under the blower for treated water, and one reserve tank for reserve water after filtration on the roof. In the first part, sewage is mixed, the mixing is intended for fine dilution of sewage.
In third portion In the third portion, water remains with bacteria and bacteria begin to die in the absence of oxygen. In an aerobic treatment process, oxygen-loving bacteria are used to decompose the organic matter. Generally, the reactions that occur within a biological sewage treatment plant help remove pollutants and organic matter from the sewage, making it safe for discharge into the environment or for reuse.
Chlorination is an important step in the biological wastewater treatment process as it helps kill harmful bacteria and pathogens in the treated wastewater. Chlorination helps kill harmful bacteria and pathogens in treated wastewater, reducing the risk of waterborne diseases and improving public health and safety. Chlorination helps disinfect treated wastewater, removing harmful microorganisms and ensuring that the treated wastewater is safe for reuse or discharge into the environment.
Chlorination helps ensure that treated wastewater meets regulatory discharge standards by reducing the levels of harmful bacteria and pathogens in the effluent. Chlorination helps improve the reuse potential of treated wastewater by removing harmful bacteria and pathogens that can affect the quality of the effluent. Chlorination helps control odors in treated wastewater by neutralizing organic compounds that can cause unpleasant odors.
Overall, chlorination is an important step in the biological sewage treatment process because it helps kill harmful bacteria and pathogens in the treated wastewater, reducing the risk of waterborne diseases while improving public health and safety.
Result and Discussion
- Test parameters comparison with standard parameter
- Comment
- Costing summary
- Gaps found in this study
- Suggestions
- Precautions
After comparing the parameters of the treated discharge water with the standard discharge water, we can make a statement that this treatment plant is effective and the treated discharge water is not harmful for reuse, except for drinking water, as fecal coliform is present in the water. The maximum contaminant level (MCL) for bacteria in drinking water is zero total coliform colonies per 100 milliliters of water, as set by the EPA. After calculating the operating cost, we find that the line cost for STP is BDT 828.28 per month.
According to this wastewater treatment plant studied, no manpower is needed for monitoring as the project engineers claim that the bacteria will perform better if there are no people present there. So, the project is automatically run by the Programmable Logic Controller (PLC) and if any problem occurs then it is automatically informed through the signal to the responsible person of the project. Testing on a regular basis is not possible here as the Snowtex group does not have equipment and a laboratory to check water parameters.
Moreover, they send water samples to India for testing which is very time consuming and quite expensive. In this type of sewage treatment plant, it is very important to have the system of water parameter testing on a regular basis to check how effectively it is working. The authorities mainly check smell of treated water, if bad smell comes, it indicates that STP is not working properly, then they send sample to Bureau Veritas for testing.
It will be much more efficient if they set up a laboratory for regular testing of water parameters and it will be more acceptable to check every hour and write a test report. The laboratory will also have to collect samples from the waste to check the samples after 10-15 days according to international standards. Since it is a biological treatment plant, the bacteria will be more active and work well if no human gets there.
No one is needed to maintain and operate the system. If a problem occurs, a signal is sent to the control room, which is located a sufficient distance from the STP.
Conclusion
Conclusion
In this study, we have tried to investigate whether sewage treatment plants are suitable or not for the garment industry and how they affect the environment. We have successfully been able to describe the basic functions of the wastewater treatment plant in this study. The discharge effluent parameters have been tested in Bureau Veritas and found that all parameters are compatible with standard discharge water parameters and also comply with local environmental regulations.
Hopefully, after this study, many readymade garment authorities will come forward to set up Sewage Treatment Plant (STP). The fantastic factor is that the operating cost of an STP is not that much, as the monthly cost is only 132525 BDT and perhaps the cost of one line is only 828.28 BDT. After the completion of this study we have found some problems and we hope it will be solved by the authorities in a short time.
No chemicals are used in this sewage treatment plant and it is fully biological which suggests that it will be more sustainable in the future. 34;Biological Wastewater Treatment Systems: Principles, Design and Operation" edited by Isam Shahrour and Ralf Otterpohl.
