Seminar presentation 12 311 (2016)
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Transcript of Seminar presentation 12 311 (2016)
ASEMINAR REPORT
ONUSE OF ETP AND STP IN WASTEWATER
TREATMENT
Guided By: Submitted By:Dr. A.K. Mathur Abhimanyu BhatProfessor C.R.No.: 12/311Dept. of Civil Engg. 12EUCCE001
ACKNOWLEDGEMENT
The satiation & euphoria that accompany the successful completion of the project would be incomplete without the mention of the people who made it possible. I owe a basket full of Thanks to a lot of people who helped me, supported me, guided me through this experience of working, which can be truly called a “Learning Journey”. The journey into seminar report would have not been possible without the guidance, assistance, encouragement and moral support from many.
First of all I would like to thank to Dr. A.K. Mathur (Professor Department of Civil Engg.), for giving me an opportunity to work on this topic.
I sincerely express my gratitude Dr. H D Charan (HOD Civil Engineering Department), Dr. A.K Dwivedi(Professor Dept. Of Civil Engg.), Dr. M.P. Choudhary(Associate Proff.) and Mr. S.K. Tak(Associate Proff.) who were always there for me throughout my Seminar Report. The report wouldn’t have been possible without their timely and added help.
Thanks are also due to my professors who contributed their valuable thoughts in my project. Last but not the least I am very thankful to my family and friends for their valuable support during my training.
CONTENTS
• Introduction • Wastewater treatment• Use of Effluent Treatment Plant(ETP)• Use of Sewage Treatment Plant(STP)• Conclusion
INTRODUCTION
• The construction vision is not only limited to develop Project but should also be environment friendly.
• Wastewater management is the process, wherein the contaminants are removed from the wastewater as well as household sewage, to produce waste stream or solid waste suitable for discharge or reuse.
• Waste water treatment Plants (Effluent Treatment & Sewerage Treatment Plant) is an important initiative which has to be taken more seriously for the betterment of the society and our future.
Wastewater Treatment• Wastewater treatment is a process to convert wastewater -
which is water no longer needed or suitable for its most recent use - into an effluent that can be either returned to the water cycle with minimal environmental issues or reused. The latter is called water reclamation and implies avoidance of disposal by use of treated wastewater effluent for various purposes.
• Treatment means removing impurities from water being treated; and some methods of treatment are applicable to both water and wastewater. The physical infrastructure used for wastewater treatment is called a “wastewater treatment plant”.
Use of Effluent Treatment Plant(ETP)
Need of ETP It purifies water and removes any toxic and non toxic
materials or chemicals from water. It treats water and makes it free from all
objectionable impurities present in suspension, colloidal or dissolved form.
It prevents groundwater pollution, sea shore, soil and marine life.
Features Stay in compliance. Reduce transportation and off-site treatment costs. Reduce supply costs by recovering production materials
out of the waste-stream for re-use. Eliminate municipal fees. Eliminate unnecessary water usage during processing. To reuse the treated effluent . For agriculture. Fully automatic integrated type. The stability period is shorten.
Flow diagram
Work Description Raw effluent pumping Inlet screening Fat removal pH correction Pre-treatment pumping Balancing/Aeration Forward feed pumping Aeration Final setting Excess sludge system Sludge thickening Dewatering feed pumps Disposal Tertiary filters Outlet flow measurement and sampling
Effluent Treatment PlantSource: EmaarMGF Marbella Site
Use of Sewage Treatment Plant(STP) Sewage treatment plant also known as Domestic treatment
plant. It removes contaminants from wastewater and household
sewage, both runoff (effluents) and domestic. It includes physical, chemical, and biological processes to
remove physical, chemical and biological contaminants. Its objective is to produce a waste stream (or treated effluent)
and a solid waste or sludge suitable for discharge or reuse back into the environment.
It treats water and make it free from all objectionable impurities present in suspension, colloidal or dissolved form.
This material is often inadvertently contaminated with many toxic organic and inorganic compounds.
Flow diagram of STP
Major Treatment units in STPPreliminary Treatment Screens Detritor/scrapers Grit Chamber Skimming Tanks Aeration
Primary Treatment Sedimentation/ Settling tank Clarifloculator Equalization Tank Neutralization Tank
Secondary Treatment Activated Sludge Process
(ASP) Trickling Filter Aerated Lagoons
Tertiary Treatment Filteration Disinfection Ion-exchange/ESP
Preliminary Treatment Mechanical medium screen
Source: internetDetritor/ Scrapper
Source: internet
Skimming Tank with separated oil & grease at topSource: internet
Primary Treatment
Different Inlet in Equalization TankSource: internetRectangular Settling Tank
Source: internet
Secondary Treatment
Trickling Filter with rotating armSource: internet
Aeration Tank in ASPSource: internet
Tertiary Treatment Tertiary treatment is the final treatment, meant for ‘polishing’ the
effluent and removal of pollutants not removed in primary and secondary treatment.
These pollutants may include soluble inorganic compounds such as phosphorous or nitrogen which may support algal growth in receiving waters.
Also removes organic materials contributing BOD, COD, color, taste, odor; bacteria, viruses, colloidal solids contributing turbidity; or soluble minerals which may interfere with subsequent re-use of the wastewater.
Preferred when treated water is need to be reuse or discharge is into a highly sensitive or fragile ecosystem (estuaries, low-flow rivers, coral reefs, etc).
Advantages of STP Reduction of BOD and COD of elements. Lesser retention time as compared to normal microbes. Increased rate of decomposition- breaks down proteins,
carbohydrates, fats, oils, for effective waste digestion and odor reduction.
Same plant treat more amount of influent with conventional design.
Effective at :pH range : 5.5-9.5Low DO : 0.8Temperature range : 5-45 degree centigrade
And very importantly F/M ratio is kept balance.
Bonus Benefits
Odour reduction up to 95%. Significant energy saving. Substantial chemical saving. Reduced sludge formation. Less operation and maintenance cost. Upto 90-95% water recycling.
Conclusion• The construction vision is not only limited to beauty of the
residential/industrial plans but is also environment friendly. • Waste water treatment is an important initiative which has to be
taken more seriously for the betterment of the society and our future.
• Wastewater treatment is the process, wherein the contaminants are removed from the wastewater as well as household sewage, to produce waste stream or solid waste suitable for discharge or reuse.
• Wastewater treatment method is categorized into three sub-divisions, physical, chemical and biological. The construction sites consist of Effluent Treatment Plant (ETP), whereas there is also for provision of Sewage Treatment Plant.
References
1. Meenakshi Jindal: Introduction to Wastewater Treatment Process
2. G.L. Kario and R.A. Christian: Wastewater Treatment-Concepts and Design Approach
3. Frank R. Spellman: Handbook of Water and Wastewater Treatment Plant Operations
4. Ronald duck: Theory and Practice of Water and Wastewater Treatment