Nitrogen Removal From Septic Effluent Utilizing On Site Wastewater Treatment Systems
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Nitrogen Removal From Septic Effluent Utilizing On Site Wastewater Treatment Systems
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Author : Michael A. Urynowicz
language : en
Publisher:
Release Date : 1995
Nitrogen Removal From Septic Effluent Utilizing On Site Wastewater Treatment Systems written by Michael A. Urynowicz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Innovative Onsite Wastewater Treatment Systems For Nitrogen Removal
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Author : Crystal Grinnell
language : en
Publisher:
Release Date : 2013
Innovative Onsite Wastewater Treatment Systems For Nitrogen Removal written by Crystal Grinnell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Nitrate released from septic system effluents can percolate through the soil, potentially contaminating ground water and exacerbating surface water eutrophication. Alternatives to conventional septic-drainfield systems can remove nitrogen from this waste-stream, thereby protecting water quality. This study compares the nitrogen removal efficiency of two onsite treatment systems designed to maximize nitrogen removal via sequential nitrification-denitrification. The key requirements for denitrification (including oxic conditions for nitrification and anoxic conditions for denitrification and bioavailable carbon), were provided in both systems, however several key design features differed. The first system was a vegetated recirculating gravel filter (Vegetated RGF) and was designed as a single step system, incorporating nitrification and denitrification conditions in tandem and utilizing the septic tank effluent as the carbon source. The second system separated the nitrification and denitrification steps, using an RGF for nitrification and a vegetated woodchip bed for denitrification. Both systems were fed residential wastewater influent for one year. The two-stage Woodchip bed system provided far greater nitrogen and fecal coliform removal than the single-stage system, however, the two stage system was highly sensitive to temperature and removed less nitrogen during cold months. The Vegetated RGF average effluent total nitrogen (TN) was 15.1 ℗ł 1.9 mg/L, which equates to an average of 69% TN removal. The Woodchip bed system produced an average effluent of 1.7 ℗ł 1.0 and 6.4 ℗ł 4.2 mg-TN/L, during warm and cold months, respectively, resulting in an average TN removal of 92%. BOD, TSS and TP removal were similar in both systems. The Woodchip bed system exhibited exemplary nitrogen and fecal coliform removal and therefore has the potential to vastly improve residential wastewater treatment.
Soil Based Wastewater Treatment
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Author : Jose A. Amador
language : en
Publisher: John Wiley & Sons
Release Date : 2020-01-22
Soil Based Wastewater Treatment written by Jose A. Amador and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-22 with Technology & Engineering categories.
Our book addresses the needs of practitioners, engineers, scientists, regulators, resource managers, planners, and others with a need to know about septic systems. It arose after discussions about the need for a text that integrated current understanding of the hydrologic, physical, chemical, and biological processes involved in the treatment of wastewater using soil. In our experience, people working with septic systems – ourselves included – have a fragmented understanding of what these systems are, how they function, how wastewater moves through soil, how and which pollutants are removed, and how these systems impact the environment and public health. The relevant information is scattered across disciplines, information sources and audiences. This book is an attempt to collect and integrate this information in one place, and provide a scientific framework for understanding soil-based wastewater treatment.
Impact Of Recirculating Nitrified Effluent On The Performance Of Passive Onsite Hybrid Adsorption And Biological Treatment Systems
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Author : Amulya Miriyala
language : en
Publisher:
Release Date : 2018
Impact Of Recirculating Nitrified Effluent On The Performance Of Passive Onsite Hybrid Adsorption And Biological Treatment Systems written by Amulya Miriyala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Effluent quality categories.
Approximately 25% of households in the U.S. treat their wastewater onsite using conventional onsite wastewater treatment systems (OWTS). These systems typically include a septic tank or a series of septic tanks followed by a soil absorption system. They effectively remove biochemical oxygen demand (BOD), total suspended solids (TSS), fats and grease but are not designed to remove significant amounts of nitrogen. High nitrogen loading to coastal and ground waters can be dangerous to aquatic life and public health. Hence, there is a need for advanced onsite wastewater treatment systems that can effectively remove nitrogen. Making enhanced nitrogen removal for OWTS as our primary goal, a laboratory scale Hybrid Adsorption and Biological Treatment Systems (HABiTS) was developed and upon observation of its effective nitrogen removal capacity, a pilot demonstration study with two side-by-side HABiTS, one with recirculation and one without recirculation (only forward flow) were constructed and tested at the Northwest Regional Water Reclamation Facility in Hillsborough County (Florida). HABiTS employ biological nitrogen removal and ion exchange for effective nitrogen removal. HABiTS is a two-stage process which uses nitrification for the oxidation of ammonium to nitrate and ion exchange for ammonium adsorption that helps buffer transient loading and also acts as a biofilm carrier in its stage 1 biofilter and it uses tire-sulfur hybrid adsorption denitrification (T-SHAD) in its stage 2 biofilter. These sulfur pellets help promote sulfur oxidation denitrification (SOD) and tire chips are used for nitrate adsorption during transient loading conditions, as biofilm carriers for denitrifying bacteria, and can also be used as organic carbon source to promote heterotrophic denitrification because they leach organic carbon. For this research, HABiTS without recirculation is considered as the control system and the performance of HABiTS with recirculation was tested for its ability to further enhance nitrogen removal from HABiTS. Nitrified effluent recirculation is a common strategy employed in wastewater treatment for enhanced nitrogen removal. It is the reintroduction of semi-treated wastewater to pass through an anoxic pre-treatment chamber to achieve better quality effluent. Recirculation is said to improve and consistently remove nitrogen at any hydraulic loading rate and/or nitrogen concentration. This is because of the dilution of high BOD septic tank effluent with nitrified effluent which lowers COD:TKN ratio and also improves mass transfer of substrates in the stage 1 biofilter. Recirculation also provides some pre-denitrification in the pre-treatment chamber, thereby reducing nitrogen load on the system. The HABiTS with recirculation (R) was run at 1:1 ratio of nitrified effluent recirculation rate to the influent flow rate for 50 days, and at 3:1 ratio for the remaining period of this research (200 days). The forward flow system (FF) was run under constant conditions throughout the research and comparisons between the two systems were made for different water quality parameters (pH, DO, conductivity, alkalinity, TSS, chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP) and various nitrogen species). The final effluent ammonium results showed that the system with recirculation removed consistently > 80% NH4+-N during 1:1 and 3:1 recirculation ratios whereas the forward flow system achieved 57% removal. Further, an average of 81% total inorganic nitrogen (TIN) removal from the system influent was seen in the recirculation systems final effluent when compared to an average of 55% in forward flow systems final effluent. This research explains in detail, the impact of nitrified effluent recirculation on enhanced nitrogen removal in onsite systems and the results presented in this thesis proved that nitrified effluent recirculation provides promising enhanced nitrogen removal in an onsite wastewater treatment system.
On Site Wastewater Treatment Systems For Nitrogen Removal From Septic Tank Effluent
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Author : Brian B. Endter
language : en
Publisher:
Release Date : 1996
On Site Wastewater Treatment Systems For Nitrogen Removal From Septic Tank Effluent written by Brian B. Endter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Process Design Manual For Nitrogen Control
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Author : United States. Environmental Protection Agency. Office of Technology Transfer
language : en
Publisher:
Release Date : 1975
Process Design Manual For Nitrogen Control written by United States. Environmental Protection Agency. Office of Technology Transfer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Nitrification categories.
Onsite Wastewater Treatment Systems Manual
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Author :
language : en
Publisher:
Release Date : 2002
Onsite Wastewater Treatment Systems Manual written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Sewage categories.
"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Nitrogen Removal In A Subsurface Disposal System Using Septic Tank Effluent As The Carbon Source
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Author : Satyanarayana Irrinki
language : en
Publisher:
Release Date : 1990
Nitrogen Removal In A Subsurface Disposal System Using Septic Tank Effluent As The Carbon Source written by Satyanarayana Irrinki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Sewage categories.
Onsite Wastewater Treatment And Disposal Systems
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Author :
language : en
Publisher:
Release Date : 1980
Onsite Wastewater Treatment And Disposal Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Septic tanks categories.
Nitrogen Removal From Municipal Wastewater
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Author : Matti Valve
language : en
Publisher: Nordic Council of Ministers
Release Date : 1995
Nitrogen Removal From Municipal Wastewater written by Matti Valve and has been published by Nordic Council of Ministers this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Water categories.
