Nutrient Removal Articles | Environmental XPRT

Why are we monitoring nutrients at different depths?

Recently, LG Sonic introduced the MPC-Lab, an innovative monitoring buoy that can monitor algae, physico-chemical variables, and even nutrients such as nitrogen and phosphorus in near real-time and at different depths in a body of water. Combined with our other monitoring tools, this system offers a unique way to detect the spatial and temporal patterns of nutrient concentrations which play a ...

Apr. 23, 2018

By LG Sonic

Nutrient removal for sewage treatment

Addition of a tertiary process provides one means of upgrading a sewage treatment plant's performance. Hans Wouters looks how this can be done using enhanced ...

Jan. 1, 2005

By Paques B.V.

Biological nutrient removal case study

The Challenge Chester Engineers was contracted by the Mountaintop Area Joint Sanitary Authority to design an upgrade to the existing treatment plant to address new Chesapeake Bay nutrient requirements and to eliminate the use of chlorine for ammonia nitrogen removal and disinfection to address trihalomethane permit violations. Chester was also required to complete the design to ...

Nov. 21, 2014

By Chester Engineers

WERF Nutrient Challenge investigates limits of nutrient removal technologies

The WERF Nutrient Challenge is a multi-year collaborative research initiative established in 2007 to develop and provide current information about wastewater treatment nutrients (specifically nitrogen and phosphorus in wastewater), their characteristics, and bioavailability in aquatic environments to help regulators make informed decisions. The Nutrient Challenge will also provide data on ...

Feb. 1, 2010

By IWA Publishing

Biological nutrient removal in a continuous biofilm process

A new biological phosphorous and nitrogen removal process is developed. The process is based on biofilm on carrier elements with enhanced biological phosphorous removal and simultaneous nitrification and denitrification in a continuous process. Results from 3 years of pilot and laboratory experiments are presented with regards to removal of organic substances, phosphorous and nitrogen. This ...

Jan. 1, 2017

By IWA Publishing

Impact of plant assemblages on nutrient removal in constructed wetlands

Four different mesocosm scale constructed wetlands - monoculture (Carexstipata), self–designed (passive) community, mixed planted monoculture–passive community and a non–vegetated control - were compared to assess the effects of plant community composition on the removal of inorganic nutrients from agricultural runoff (synthetic tile water). The mixed and self–designed systems consistently ...

Apr. 8, 2013

By Inderscience Publishers

Effluent management flexibility through nutrient removal

ABSTRACT The City of Carson City (City) Wastewater Reclamation Plant (WRP) is facing several effluent management challenges, which include increased effluent nitrogen concentrations, seepage from its reclaimed water storage reservoir, and increased influent flow due to growth. The City desires an economical solution that will allow it to continue its 100 percent reuse program as well as ...

Oct. 13, 2007

By Water Environment Federation (WEF)

A Critical New Look at Nutrient Removal Processes

ABSTRACTThis paper questions the basic practice of using large unaerated zones and large mixed liquor recycle flows to achieve TN and TP removal. It shows that the use of chemicals and different process approaches may be simpler, cheaper and, maybe, even better. INTRODUCTIONMost people in our profession seem to believe the only way to design nutrient removal wastewater treatment plants (wwtp) is ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Impact of multiple wastewater feedings on the efficiency of nutrient removal in an IFAS-MBSBBR: number of feedings vs. efficiency of nutrient removal

This article presents the results of research into the influence of one, two and three wastewater feedings in a cycle on efficiency and performance of combined biological nitrogen and phosphorus removal in an integrated fixed-film activated sludge and moving-bed sequencing batch biofilm reactor (IFAS-MBSBBR). The experiment lasted 158 days and was conducted in two laboratory models of the ...

Jul. 5, 2016

By IWA Publishing

Nutrient Control Design Manual

The purpose of this EPA design manual is to provide updated, state‐of‐the‐technology design guidance on nitrogen and phosphorus control at municipal Wastewater Treatment Plants (WWTPs). Similar to previous EPA manuals, this manual contains extensive information on the principles of biological nutrient removal and chemical phosphorus removal to serve as the basis for design. A ...

Oct. 3, 2012

By IWA Publishing

Effects of nutrient loading on Anabaena flos-aquae biofilm: biofilm growth and nutrient removals

Effects of three different nutrient loadings (low nutrient loading, medium nutrient loading and high nutrient loading, denoted as LNS, MNS and HNS, respectively) on the structure and functions of algal biofilm using Anabaena flos-aquae were investigated using synthetic wastewater. Nutrients removal efficiencies, biofilm thickness, microalgae dehydrogenase activity (DHA) and exopolysaccharide ...

Apr. 30, 2016

By IWA Publishing

Impacts of variable pH on stability and nutrient removal efficiency of aerobic granular sludge

The impact of pH variation on aerobic granular sludge stability and performance was investigated. A 9-day alkaline (pH = 9) and acidic (pH = 6) pH shocks were imposed on mature granules with simultaneous chemical oxygen demand (COD), nitrogen and phosphorus removal. The imposed alkaline pH shock (pH 9) reduced nitrogen and phosphorus removal efficiency from 88% and 98% to 66% and 50%, ...

Sep. 7, 2015

By IWA Publishing

Biological Nutrient Removal: Where We Have Been, Where We Are Going?

The paper covers the early research that led to the development of the biological nutrient removal (BNR) technology that is widely practiced today then looks at the present and future of BNR. Presently only suspended and attached growth biological processes or a combination of the two are used to reduce nitrogen concentration to around 3 mg/L. New technologies such as the SHARON® and ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Microbe Edition: Biological Nutrient Removal How In-Pipe Technology Works

Biological Nutrient Removal (BNR) is critical for tie preservation of our lakes and streams. Large amounts of waste products are passed through our sewage treatment systems on a continuous basis. Nutrient loads discharged from these systems must be reduced to avoid eutrophication of the receiving waters. Microbes are aarticularly useful in biodegrading most of the com sounds treated by wastewater ...

Mar. 3, 2016

By In-Pipe Technology Company, Inc.

Using a continuous-fill, intermittent-discharge SBR to remove biological nutrients

Five years ago, the Town of Essex, in southwestern Ontario, decided to upgrade its facultative lagoon treatment systems with an alternative wastewater treatment plant — a continuous-fill, intermittent-discharge sequencing batch reactor (CFID-SBR) system, targeting even higher effluent quality. The CFID SBR process was designed by Premier Tech Aqua, which also provided major process ...

Jan. 1, 2011

By Premier Tech Aqua

The role and control of sludge age in biological nutrient removal activated sludge systems

The sludge age is the most fundamental and important parameter in the design, operation and control of biological nutrient removal (BNR) activated sludge (AS) systems. Generally, the better the effluent and waste sludge quality required from the system, the longer the sludge age, the larger the biological reactor and the more wastewater characteristics need to be known. Controlling the reactor ...

Apr. 1, 2010

By IWA Publishing

A practical protocol for calibration of nutrient removal wastewater treatment models

Activated sludge models can be very useful for designing and managing wastewater treatment plants (WWTPs). However, as with every model, they need to be calibrated for correct and reliable application. Activated sludge model calibration is still a crucial point that needs appropriate guidance. Indeed, although calibration protocols have been developed, the model calibration still represents the ...

Oct. 1, 2011

By IWA Publishing

ORP and pH Based Control of SBR Cycles for Nutrient Removal from Wastewater

ABSTRACTContinuous monitoring of multiple process functions were conducted involving removals of BOD, TSS and nutrients, in each cycle of the SBR reactor at the wastewater treatment plant of the City of Carrabelle, FL. On line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Landfill leachate treatment for biological nutrient removal from wastewater

Substantial volumes of leachate have been generated at the recently opened lined cells of the Orange County Landfill located in central Florida. To accommodate these volumes, a force main was installed to deliver leachate to the Eastern Service Area Wastewater Treatment Facility (ESAWTF) operated by the Orange County Public Utilities Division, which uses a biological nutrient removal process. ...

Sep. 17, 2009

By Inderscience Publishers

Time Vs. Space: Two Successful Biological Nutrient Removal Strategies

Two distinct strategies have been practiced successfully for nutrient removals at a facility. One utilizes a continuous flow strategy with designated anaerobic, anoxic and aerobic zones. This strategy was targeted for biological nitrogen and phosphorus removal with minimal chemical addition. The other utilizes anaerobic, anoxic and aerobic cycle times in sequence at existing basins under a timer ...

Oct. 21, 2006

By Water Environment Federation (WEF)

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