Mass balance relies on the conservation of mass principle. By doing mass balance the materials entering and leaving the system and mass flows can be identified which are unknown at the beginning. According to the conservation law, mass cannot disappear or be created spontaneously.
The boundaries of the system cover all of the liquid and constituent flows into and out of the system. The control volume is used to identify the actual volume in which change is occurring.
Wednesday, June 24, 2009
Wednesday, April 29, 2009
Wastewater engineering: treatment and reuse - Metcalf
Metcalf is an mportant reference book for environmental engineers. Thanks to Google Books we can reach it from internet.
Of course it is not a full copy of the book, there are some restrictions.
Wastewater Engineering: Treatment and Reuse, 4/e is a thorough update of McGraw-Hill's authoritative book on wastewater treatment. No environmental engineering professional or civil or and environmental engineering major should be without a copy of this book- tt describes the technological and regulatory changes that have occurred over the last ten years in this discipline, including: improved techniques for the characterization of wastewaters; improved fundamental understanding of many of the existing unit operations and processes used for wastewater treatment, especially those processes used for the biological removal of nutrients; greater implementation of several newer treatment technologies (e.g., UV disinfection, membrane filtration, and heat drying); greater concern for the long term health and environmental impacts of wastewater constituents; greater emphasis on advanced wastewater treatment and risk assessment for water reuse applications; changes in regulations and the development of new technologies for wastewater disinfection; and new regulations governing the treatment, reuse, and disposal of sludge (biosolids). Greater concern for infrastructure renewal including upgrading the design and performance of wastewater treatment plants.
http://books.google.com/books?id=L1MAXTAkL-QC&printsec=frontcover
Of course it is not a full copy of the book, there are some restrictions.
By George Tchobanoglous, Franklin Louis Burton, H. David Stensel, Metcalf & Eddy
Edition: 4, illustrated
Published by McGraw-Hill Professional, 2002
Wastewater Engineering: Treatment and Reuse, 4/e is a thorough update of McGraw-Hill's authoritative book on wastewater treatment. No environmental engineering professional or civil or and environmental engineering major should be without a copy of this book- tt describes the technological and regulatory changes that have occurred over the last ten years in this discipline, including: improved techniques for the characterization of wastewaters; improved fundamental understanding of many of the existing unit operations and processes used for wastewater treatment, especially those processes used for the biological removal of nutrients; greater implementation of several newer treatment technologies (e.g., UV disinfection, membrane filtration, and heat drying); greater concern for the long term health and environmental impacts of wastewater constituents; greater emphasis on advanced wastewater treatment and risk assessment for water reuse applications; changes in regulations and the development of new technologies for wastewater disinfection; and new regulations governing the treatment, reuse, and disposal of sludge (biosolids). Greater concern for infrastructure renewal including upgrading the design and performance of wastewater treatment plants.
http://books.google.com/books?id=L1MAXTAkL-QC&printsec=frontcover
Wednesday, April 15, 2009
Type's of Wastewater Treatment Plant
Civil and Environmental Engineer divide wastewater treatment plants into 2 main categories according to their wastewater characteristics. These are;
1- Industrial WWT Plants
2- Domestic WWT Plants
Industrial WWT Plants
Industrial wastewater treatment plants treat wastewater by physical, chemical, biological or chemical-biological activities.
Domestic WWT Plants
Domestic WWT treatment plants generally treat wastewater originating from human activies from where cities, states, villages, holiday resorts etc.
According to govermental effluent dischage limits it may treat TSS, BOD, COD or NH4, NO3 or P.
1- Industrial WWT Plants
2- Domestic WWT Plants
Industrial WWT Plants
Industrial wastewater treatment plants treat wastewater by physical, chemical, biological or chemical-biological activities.
Domestic WWT Plants
Domestic WWT treatment plants generally treat wastewater originating from human activies from where cities, states, villages, holiday resorts etc.
According to govermental effluent dischage limits it may treat TSS, BOD, COD or NH4, NO3 or P.
Waste Water Engineer's Blog
It is being complicate to desing and operate wastewater treatment plants by innovative technologies on environmental industry.
Wastewater Engineer blog is created to inform civil and environmental engineer about wastewater treatment plant desing and operation.
We will divide wastewater treatment plant according to treatment achievement such as, activated sludge, activated sludge with nitrification, BNR (biological nutrient removal) etc.
Wastewater Engineer blog is created to inform civil and environmental engineer about wastewater treatment plant desing and operation.We will divide wastewater treatment plant according to treatment achievement such as, activated sludge, activated sludge with nitrification, BNR (biological nutrient removal) etc.
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