Nutrient Removal Articles on Environmental XPRT

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

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)

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)

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

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

Enhanced nutrient removal MBR system with chemical addition for low effluent TP

A pilot study was conducted to test an membrane bioreactor (MBR) process for combined biological and chemical P removal to achieve a very low effluent total phosphorus (TP) concentration of 0.025 mg P/L. With the data from the pilot test, a simulation study was performed to demonstrate that: (1) the pilot system behaviour (effluent quality, MLSS, etc.) can be modelled accurately with an activated ...

Jan. 1, 2011

By IWA Publishing

Bacterial composition and nutrient removal with a novel PIA-A2/O sewage treatment

A novel post intermittent aeration anaerobic–anoxic–oxic (PIA-A2/O) process was developed to integrate shortcut nitrification–denitrification with denitrifying phosphorus (P) removal for domestic sewage treatment. With the transformation in configuration and phased start-up strategy, the nitritation rate and the ratio of denitrifying phosphorus accumulating organisms to phosphorus accumulating ...

Mar. 7, 2016

By IWA Publishing

Influence of nutrient supplementation on DOC removal in drinking water biofilters

Analysis of the impacts of nitrogen, phosphorus and potassium supplementation on biofilter performance for organic carbon removal was studied on laboratory-scale biofilter columns. Three dual media biofilter columns were fed with synthetic raw water C:N:P ratios of 546:24:1, 100:10:1, and 25:5:1 (w/w) to simulate nutrient limited and two nutrient supplemented conditions, respectively. Research ...

Sep. 17, 2016

By IWA Publishing

Using wetland plants in nutrient removal from municipal wastewater

In this study, three wetland plant species (phragmites australis, typha and rush) were planted in separate cells to evaluate the proportion of total nitrogen (TN) and total phosphorus (TP) removal attributed to storage in plants. Four cells were considered for each plant to be tested in a completely randomised design having four replications. Results show that the uptakes of nutrients by rush, ...

Aug. 25, 2014

By Inderscience Publishers

Identification and evaluation of a dominant alga from municipal wastewater in removal of nutrients

To access better removal of nutrients with algae-based techniques, a dominant alga from real municipal wastewater was identified and its capacity in removing low concentrations of nitrogen (NH+4 or NO−3) and phosphorus (PO3−4) was evaluated. Results showed that Oedogonium brevicingulatum, a filamentous green alga, was confirmed ...

Oct. 1, 2016

By IWA Publishing

Integrated side-stream reactor for biological nutrient removal and minimization of sludge production

Integrated processes to reduce in situ the sludge production in wastewater treatment plants are gaining attention in order to facilitate excess sludge management. In contrast to post-treatments, such as anaerobic digestion which is placed between the activated sludge system and dewatering processes, integrated technologies are placed in the sludge return line. This study evaluates the ...

Apr. 13, 2015

By IWA Publishing

Biological nutrients & micro-pollutants removal and microbial community structure in a membrane bioreactor

ABSTRACT Biological nutrient removing (BNR) performance was evaluated at different operating conditions using an innovative system, sequencing anoxic/anaerobic-aerobic membrane bioreactor (SAM). The SAM was operated at: internal recycling rate of 1.0, 1.5, 2.5; and 3.0 time of influent flow; SRT of 20, 40, and 100 days; low and moderate influent COD at hydraulic retention time of 4 hrs and 8 ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Examples of energy self-sufficient municipal nutrient removal plants

In Austria, two municipal WWTPs (the Strass TP and Wolfgangsee-Ischl TP) operated with nutrient removal and aerobic sludge digestion are now energy self-sufficient. This is the result of a long-standing and on-going optimisation process at both plants including optimal aeration control and control of the aerobic section of the aeration tank to optimise denitrification and prevent degradation of ...

Jan. 1, 2011

By IWA Publishing

Nutrient removal ability and resistance of five hydrophytes under low-temperature conditions

Five indigenous hydrophytes were studied for removal of nitrogen and phosphorus at different nutrition levels by artificial imitation of the low-temperature weather conditions of the Taihu lake area. The rate of nitrogen and phosphorus uptake was dependent on the nutrient concentrations and a positive correlation between the prolines of hydrophytes and the latter were found. High percentages of ...

Sep. 27, 2010

By Inderscience Publishers

Nutrient Removal from Anaerobic Digester Side-Stream at the Blue Plains AWTP

ABSTRACTImplementation of a novel sidestream treatment configuration will provide the Blue Plains AWTP sidestream treatment process the flexibility to operate in four different process modes including the MAUREEN, SHARON, STRASS and DEMON configurations. Each process confers specific benefits to the AWTP that will need to achieve stringent nutrient limits to support ongoing efforts within the ...

Oct. 22, 2006

By Water Environment Federation (WEF)

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

Vertical flow constructed wetlands: kinetics of nutrient and organic matter removal

The kinetics of organic matter and nutrient removal in a pilot vertical subsurface wetland with red ferralitic soil as substrate were evaluated. The wetland (20 m2) was planted with Cyperus alternifolius. The domestic wastewater that was treated in the wetland had undergone a primary treatment consisting of a septic moat and a buffer tank. From the sixth week of operation, the ...

Jul. 16, 2014

By IWA Publishing

Subscribe to our eBulletins

Add Supplier Profile