Kjeldahl nitrogen Articles
-
Removal of Congo red from textile wastewater by ozonation
Congo red, which has a complex molecular structure with various diazo aromatic groups, is widely used in textile industry as an anionic dye. The purpose of this study was to investigate the degradation of Congo red in laboratory solution which had the chemical properties of the rinse waters of textile manufacturing dye-houses and the samples with Congo red alone wastewater by ozonation and to ...
-
Muratli Organized Industrial Zone – Case Study
Project Name Murath Organized Industrial Zone Wastewater Treatment Plant Employer Murath Organized Industrial Zone Contractor Enta Muhendislik Aritma Taah. San. Ve Tic. Ltd. Sti- Location of the plant Tekirdag/TURKEY Scope of work Design of Industrial Wastewater Treatment Plant Contract Date 2012 Completion Date 2013 Flowrate of the plant: 37.500 m3/ day Inlet Pollution Parameters: COD: ...
-
Performance of membrane bioreactor to different hydraulic shock loadings
A Membrane Bioreactor (MBR) treating simulated sewage was operated and stabilised for a period of 60 days at an organic loading rate of 3.6 g/COD/day and Hydraulic Retention Time (HRT) of 8 h, during which the MBR showed 95% removal of Chemical Oxygen Demand (COD), 98% removal of Total Organic Carbon (TOC) and TSS, 91% removal of Total Kjeldahl Nitrogen (TKN) and 30% removal of phosphate. The ...
-
Treatment performances of French constructed wetlands: results from a database collected over the last 30 years
Approximately 3,500 constructed wetlands (CWs) provide raw wastewater treatment in France for small communities (<5,000 people equivalent). Built during the past 30 years, most consist of two vertical flow constructed wetlands (VFCWs) in series (stages). Many configurations exist, with systems associated with horizontal flow filters or waste stabilization ponds, vertical flow with ...
-
Efficient nitrogen removal for wastewater in compartmentalised activated sludge process
Studies were conducted on two aerobic-anaerobic configurations of the activated sludge process for nitrogen removal from domestic wastewater. An initial anaerobic stage followed by aerobic, anaerobic and aerobic stages provided best total Kjeldahl nitrogen removal. This profile was selected for conducting further experiments on the effect on nitrogen removal of the hydraulic loading and the food ...
-
An aeration control strategy for oxidation ditch processes based on online oxygen requirement estimation
A feedforward-feedback aeration control strategy based on online oxygen requirements (OR) estimation is proposed for oxidation ditch (OD) processes, and it is further developed for intermittent aeration OD processes, which are the most popular type in Japan. For calculating OR, concentrations of influent biochemical oxygen demand (BOD) and total Kjeldahl nitrogen (TKN) are estimated online by ...
-
Successful startup of a full-scale acrylonitrile wastewater biological treatment plant (ACN-WWTP) by eliminating the inhibitory effects of toxic compounds on nitrification
During the startup of a full-scale anoxic/aerobic (A/O) biological treatment plant for acrylonitrile wastewater, the removal efficiencies of NH3-N and total Kjeldahl nitrogen (TKN) were 1.29 and 0.83% on day 30, respectively. The nitrification process was almost totally inhibited, which was mainly caused by the inhibitory effects of toxic compounds. To eliminate the inhibition, ...
-
Maintaining Nitrification During Cold Weather
Cold weather can turn wastewater plants topsy-turvy, upending all one’s hard work to maintain compliance. When you are attempting to maintain adequate nitrification in your wastewater treatment plant (WWTP) to ensure that nitrogen associated permit limits such as Ammonia-Nitrogen (NH3-N), Total Kjeldahl Nitrogen (TKN), and Total Nitrogen (TN) are met, it is essential to stay on top of ...
-
Pollutant removal in a multi-stage municipal wastewater treatment system comprised of constructed wetlands and a maturation pond, in a temperate climate
A multi-stage municipal wastewater treatment system is proposed to comply with Mexican standards for discharge into receiving water bodies. The system is located in Santa Fe de la Laguna, Mexico, an area with a temperate climate. It was designed for 2,700 people equivalent (259.2 m3/d) and consists of a preliminary treatment, a septic tank as well as two modules operating in parallel, each ...
-
Constructed wetlands and solar-driven disinfection technologies for sustainable wastewater treatment and reclamation in rural India: SWINGS project
SWINGS was a cooperation project between the European Union and India, aiming at implementing state of the art low-cost technologies for the treatment and reuse of domestic wastewater in rural areas of India. The largest wastewater treatment plant consists of a high-rate anaerobic system, followed by vertical and horizontal subsurface flow constructed wetlands with a treatment area of around ...
-
Alum application to improve water quality in a municipal wastewater treatment wetland
Received for publication January 18, 2008. Nutrient removal in treatment wetlands declines during winter months due to temperature. A 3-mo (wintertime) mesocosm study was conducted to determine the effectiveness of alum in immobilizing P as well as other nutrients during this period of reduced treatment efficiency. Eighteen mesocosms, triplicate alum, and three controls or no alum were ...
-
Treatment of wastewater and restoration of aquatic systems through an eco-technology based constructed treatment wetlands – a successful experience in Central India
In the last couple of decades constructed wetlands (CWs) have drawn considerable interest in Central India. CWs offer an effective means of integrating wastewater treatment and resource enhancement, often at competitive cost in comparison to conventional wastewater treatments, with additional benefits of Green Urban Landscaping and wildlife habitat. This paper describes treatment performances ...
-
Municipal wastewater characteristics in Thailand and effects of soft intervention measures in households on pollutant discharge reduction
In developing countries with large Millennium Development Goals (MDGs) sanitation indicator, pollutant discharge reduction function of wastewater treatment systems should be considered. In this paper, pollutant generations per capita (PGCs) and pollutant discharges per capita (PDCs) are estimated as a base dataset for wastewater management in Thailand. PDCs of black water, i.e. toilet wastewater, ...
-
Pilot trial study of a compact macro-filtration membrane bioreactor process for saline wastewater treatment
Conventional membrane bioreactor (MBR) systems have increasingly been studied in recent decades. However, their applications have been limited due to their drawbacks such as low flux, membrane fouling, and high operating cost. In this study, a compact macro-filtration MBR (MfMBR) process was developed by using a large pore size membrane to mitigate the membrane fouling problem. A pilot trial of ...
-
Intermittent feeding of wastewater in combination with alternating aeration for complete denitrification and control of filaments
In the present study, a laboratory scale system, consisting of a primary settling tank, a continuous stirred tank reactor and a clarifier were constructed and operated, using wastewater from the municipal wastewater treatment plant in Xanthi, Greece. The system operated under intermittent aeration in aerobic/anoxic conditions and feeding of the wastewater once in every cycle. The unit was ...
-
Optimization of operational parameters in moving bed biofilm reactor with low cost polystyrene biocarrier by the response surface method
The combined effects of three independent variables (carrier filling ratio, aeration rate and reactor run time (RRT)) were evaluated in a continuous moving bed biofilm reactor (MBBR) through central composite design (CCD) of the response surface methodology (RSM) for experimental design, analysis and process optimization for municipal wastewater treatment processes. A low-cost polystyrene ...
-
Upflow anaerobic sludge blanket and aerated constructed wetlands for swine wastewater treatment: a pilot study
Swine wastewater management is often affected by two main issues: a too high volume for optimal reuse as a fertilizer and a too high strength for an economically sustainable treatment by classical solutions. Hence, an innovative scheme has been tested to treat swine wastewater, combining a low cost anaerobic reactor, upflow anaerobic sludge blanket (UASB), with intensified constructed ...
-
Sewer Collection System Bioaugmentation Reduces Influent Load and Improves Plant Performance
Abstract The effectiveness of In-Pipe Technology (IPT) patented sewer collection system engineered bioaugmentation on i) influent wastewater loads to wastewater treatment plant (WWTP), ii) WWTP performance, and iii) effluent quality, was a demonstrated at a domestic sequencing batch reactor (SBR) WWTP (Sewer District #20) in Suffolk County, Long Island, New York in collaboration with the Suffolk ...
-
Homestead village case study
Performance History and Discussion The wastewater treatment facility for the Homestead Village apartment community treats about 115,000 gallons per day of wastewater for discharge into onsite infiltration lagoons. The facility is required to remove nitrogen from the wastewater to less than 10 mg/L before discharging into the ground. The facility struggled to consistently meet this requirement. 8 ...
-
Beyond the barriers of water reuse
Water reuse may be the moment’s most talked about treatment industry topic. It’s no wonder that as drought persists in regions throughout the world without sign of subsiding, questions about how we can make the most of our water are being asked. An answer can be found in the ways that we apply membrane bioreactor (MBR) technology. As one of the most central components for water ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you