nutrient removal Articles | 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 ...

Dec. 31, 2004

By Paques Technology B.V.

Post-Treatment Options for the Anaerobic Treatment of Domestic Wastewater

This paper focuses on the post-treatment options for the anaerobic treatment of domestic wastewater. Initially, the main limitations of anaerobic systems regarding carbon, nutrients and pathogen removal are presented. In sequence, the advantages of combined anaerobic/aerobic treatment and the main post-treatment options currently in use are discussed, including the presentation of flowsheets and ...

Dec. 31, 2005

By Springer

Putting Operators in Control a Straightforward Approach to BNR Clarifier Operation

ABSTRACT Successful operation of any activated sludge process depends on understanding the capacity of secondary clarifiers. As biological treatment facilities are operated to achieve biological nutrient removal (BNR), a careful balance must be made between reactor and secondary clarifier capacity to achieve the various treatment goals. This paper presents an approach to assist ...

Oct. 12, 2007

By Water Environment Federation (WEF)

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 ...

Dec. 31, 2016

By IWA Publishing

Insitu Soil Remediation case study

A burst storage tank resulted in severe pollution beneath a building. Using EU70 and added nutrients the contractor was able to use insitu remediation techniques to very quickly reduce the contaminates to levels well below those required by the authorities. Additional benefits were the minimal disturbance to property and access and the ability to provide a complete solution. This could not ...

Aug. 8, 2013

By Bio Systems Europe

Biosolids management evaluation study for water reclamation facility, Sioux Falls, South Dakota

The Sioux Falls Water Reclamation Facility (WRF) treats primary and secondary sludges in three primary anaerobic digesters and one secondary digester. Treated sludge is stored in lagoons until disposal by land application. Continuation of the land application process will require significant investment. The primary purpose of this study is to evaluate alternative biosolids handling and ...

Dec. 31, 2016

By IWA Publishing

Evaluation of Microbial Communities Colonizing Stone Ballasts at Diesel Depots

In this study, we evaluated the heterotrophic microbial communities colonising stone ballasts at diesel depots. The number of bacteria (both total culturable heterotrophic bacteria and hydrocarbon-degrading bacteria) was proportional to the level of hydrocarbon contamination. However, there was no significant difference in the level of total culturable heterotrophs (TCHs) and the hydrocarbon ...

Jul. 31, 2005

By Springer

Effect of microalgae inoculation on the start-up of microalgae–bacteria systems treating municipal, piggery and digestate wastewaters

The effect of the inoculation of a microalgae–bacteria system on the removal of nutrients and organic matter using municipal, piggery and digestate wastewaters was evaluated. Three conditions for each substrate were evaluated: (1) inoculation with activated sludge and illumination, (2) inoculation with activated sludge without illumination, and (3) inoculation with activated sludge plus a ...

Oct. 25, 2015

By IWA Publishing

Applicability of the sequencing batch reactor for wastewater treatment

The sequencing batch reactor is a viable and flexible tool for the treatment of domestic and industrial wastewater. It removes not only carbonaceous matter, but also nitrogenous species and some biological nutrients. From the economic and operational points of view, it has advantages over the so-called conventional activated sludge system. Besides this, it can be used in various wastewater ...

Jan. 25, 2004

By Inderscience Publishers

Oxygen transfer in activated sludge – new insights and potentials for cost saving

The α-factor has the greatest impact on the calculation of the required standard oxygen transfer rate (SOTR) in activated sludge systems equipped with submerged aeration systems. Knowing the dependencies of the α-factor leads to a better design of the aeration devices and, consequently, to a more efficient use of aeration energy. Applying the current state of knowledge about ...

Dec. 31, 2010

By IWA Publishing

Household greywater treatment methods using natural materials and their hybrid system

Discharge of household greywater into water bodies can lead to an increase in contamination levels in terms of the reduction in dissolved oxygen resources and rapid bacterial growth. Therefore, the quality of greywater has to be improved before the disposal process. The present review aimed to present a hybrid treatment system for the greywater generated from households. The hybrid system ...

Jul. 27, 2016

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. 26, 2010

By Inderscience Publishers

Mechanism and kinetics of Zn(II) removal from wastewater by immobilised beads of SRB sludge

The treatment of Zn(II)-bearing wastewater by immobilised Sulfate Reducing Bacteria (SRB) sludge beads of inner cohesive nutrient source was investigated, by which the traditional problems in SRB methods were resolved. The mechanism and kinetics model on Zn(II) removal were studied. The results showed that SO42− was reduced to S2− on the surface of SRB sludge beads, and Zn(II) precipitated ...

Apr. 7, 2009

By Inderscience Publishers

Removal of Organics and Nutrients from the Combined Sewage in Shanghai Using Coagulation-Flocculation Process

Organics and nutrients removal by coagulation-flocculation process using polyaluminiumferric chloride and its aids, applied to a combined sewage in Shanghai, were studied. Cationic polyacrylamide (PAM), polyvinyl alcohol (PVA), a new type of polyelectrolyte (AN) and activated silica (AS) were used as coagulant aids. Performances were measured under optimum conditions for the polyaluminium-ferric ...

Oct. 20, 2006

By Water Environment Federation (WEF)

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. 2, 2012

By IWA Publishing

Nitrogen removal from polluted river water by surface flow wetland with forage rice (Oryza sativa L. cv. Kusahonami)

To investigate the potential of nitrogen removal and recycling from nutrient polluted river water, a pilot surface flow wetland with forage rice was constructed beside the estuary of the Sannogawa River. The average nitrogen removal rate was 189 mg m−2 d−1 in the constructed wetland. Although the nitrogen assimilation rate by rice plants was only 44 mg m−2 d−1 in the first two months, the rate ...

Jul. 19, 2009

By Inderscience Publishers

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 ...

Dec. 31, 2010

By IWA Publishing

Significance of Phosphorus in Anaerobic Digestion Residuals Recovery

Gas production and energy potential typically dominate the spotlight in the anaerobic digestion (AD) technology world, while benefits of residues and nutrient management from AD are overshadowed. However, utilizing AD residues and considering the value of properly managing nutrients, such as phosphorus, may make-or-break projects considered uneconomical based on energy production value alone. ...

Nov. 5, 2014

By BIOFerm™ Energy Systems

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. 7, 2013

By Inderscience Publishers

Evaluation of Several Water Reclamation Facilities Employing Biological Nutrient Removal in North Carolina

Abstract As an increasing number of lakes and streams are being classified as impaired or nutrient sensitive, a greater burden is placed on municipalities to comply with water quality restrictions. During the past decade in North Carolina, specifically in the Neuse River and Tar-Pamlico River Basins, many municipalities were required to upgrade their wastewater treatment plants for nutrient ...

Dec. 31, 2001

By Arcadis

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