activated sludge monitor Articles

Comparison of microbial activity in anaerobic and microaerobic digesters

Microaerobic alternative of anaerobic digestion offers many advantages especially when sulfide concentration in the digester is high. For better understanding of the microaerobic technology more detailed characterization of biomass activity is needed. Two equal digesters were operated under the same condition except of microaeration in one of them. During long term operation of anaerobic and ...

Jan. 1, 2011

By IWA Publishing

Discharge quality from municipal wastewater treatment plants and the Sludge Biotic Index for activated sludge: integrative assessment

Wastewater treatment plants (WWTPs) are scrutinized by Environmental Authorities particularly regarding the compliance to discharge limit values fixed by national and local regulations. An integrated approach is necessary to achieve the objectives established with Directive 2000/60/EC (WFD) considering the ecological status of the receiving water body and the quality of the discharge. ...

Jan. 1, 2017

By IWA Publishing

N-Tox® prevents activated sludge failure and monitors greenhouse gas emissions

A new technique for evaluating nitrification efficiency in industrial and municipal activated sludge systems is described that uses direct measurement of dinitrogen oxide, an important greenhouse gas, as an indicator of nitrification failure. Developed at Water Innovate, N-Tox® helps control ammonia levels in treated effluent by providing an early warning of wastewater treatment failure. The ...

Feb. 1, 2006

By Clarity Authoring

Valuation of OSA process and folic acid addition as excess sludge minimization alternatives applied in the activated sludge process

The aim of this study was to investigate the ability of the oxic-settling-anaerobic (OSA)-process and the folic acid addition applied in the activated sludge process to reduce the excess sludge production. The study was monitored during two distinct periods: activated sludge system with OSA-process, and activated sludge system with folic acid addition. The observed sludge yields (Yobs) were ...

Oct. 26, 2015

By IWA Publishing

Doing it with data - Case Study

In 1994, the Bonnybrook Wastewater Treatment Plant in Calgary, Alta., completed the first phase of an upgrade to biological nutrient removal (BNR) after several years of testing. Bonnybrook was not the first treatment plant to upgrade bioreactors for nutrient removal: Other communities had struggled with the technology. Bonnybrook operators determined that real-time information on final effluent ...

Jul. 29, 2019

By ChemScan, Inc.

Advances in Wastewater Management - Monitoring and Control of Activated Sludge Process

Introduction The Oxygen Uptake Rate (OUR) by the bacteria in Activated Sludge is one of the most significant measures available in wastewater management and a new generation of sophisticated online OUR multi-parameter instruments linked to Plant Control Systems and the Internet of Things is planned to deliver the next step change in Environmental excellence. These devices have the capability to ...

Sep. 1, 2017

By Strathkelvin Instruments Limited

In situ microscopy as a tool for the monitoring of filamentous bacteria: a case study in an industrial activated sludge system dominated by M. parvicella

The present study demonstrates the application of in situ microscopy for monitoring the growth of filamentous bacteria which can induce disturbances in an industrial activated sludge process. An in situ microscope (ISM) is immersed directly into samples of activated sludge with Microthrix parvicella as dominating species. Without needing further preparatory steps, the automatic evaluation of ...

Dec. 1, 2015

By IWA Publishing

Rapid quantification of polyhydroxyalkanoates (PHA) concentration in activated sludge with the fluorescent dye Nile blue A

The present study was conducted (1) to develop a rapid quantification method of polyhydroxyalkanoates (PHA) concentration in activated sludge by Nile blue A staining and fluorescence measurement and (2) to perform on-line monitoring of PHA concentrations in activated sludge. Activated sludge samples collected from laboratory scale sequencing batch reactors and full-scale wastewater treatment ...

Jan. 1, 2011

By IWA Publishing

Improving Biological Wastewater Treatment Process Control through ATP-Based Parameters

ABSTRACTBiological wastewater treatment processes harness the ability of microorganisms to break down and assimilate organic compounds that, if left untreated, cause detriment to the environment. Although this process occurs naturally, engineered systems are used to accelerate the process by optimizing bioreactor conditions to promote higher-than-typical biomass concentrations, thus increasing ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Filterability assessment in membrane bioreactors using an <italic>in-situ</italic> filtration test cell

Filterability assessment in membrane bioreactors using an in-situ filtration test cell

A new method for the assessment of the filterability in membrane bioreactors was tested for five months in four MBR units in Berlin. The new method BFM (Berlin Filtration Method) for filterability assessment uses a small membrane filtration test cell which can be submerged directly in the biological tanks to determine the filterability of the activated sludge in-situ. The test cell contains an ...

Aug. 1, 2010

By IWA Publishing

Advanced respirometry for activated sludge process

Introduction Respirometry is the measurement and interpretation of the biological oxygen consumption rate under well defined experimental conditions. Because oxygen consumption is directly associated with both biomass growth and substrate removal, respirometry is a very useful technique for monitoring, modeling and control of the activated sludge process The Respirometry technology is a well ...

Jan. 18, 2021

By SURCIS, S.L.