biological oxygen demand removal Articles

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Performance and metabolic aspects of a novel enhanced biological phosphorus removal system with intermittent feeding and alternate aeration

by IWA Publishing  (Apr. 24, 2014)

A novel enhanced biological phosphorus removal (EBPR) system, which combined the intermittent feeding design with an anaerobic selector, was examined using on-line oxidation reduction potential (ORP), nitrate and ammonium probes. Two experimental periods were investigated: the aerobic and anoxic phases were set at 40 and 20 minutes respectively ...

Toxicity reduction and biodegradability enhancement of cork processing wastewaters by ozonation

by IWA Publishing  (Nov. 29, 2013)

Biodegradability enhancement and detoxification of cork boiling wastewater (CBW) are required for the successful implementation of biological treatment options. We studied the possibility of achieving these goals through ozonation pre-treatment by experimenting on the effect of ozone dose and pH. The CBW used had a pH of 5.81, a chemical oxygen ...

Getting more for less …15 years later and still going strong !

by Aeration Industries International (AII)  (Dec. 22, 2008)

' We’re getting twice the agitation we were before, and for less electricity.' Problem This Northern USA dairy products company always met its wastewater treatment discharge limits. Biological oxygen demand (BOD) was within permit limits. The company tried many methods in treating its three-pond wastewater treatment system: chemicals, filters, ...

Pulp and paper mill aerated lagoon phosphorus optimization

by Water Environment Federation (WEF)  (Oct. 13, 2007)

The Domtar (formerly Weyerhaeuser) Kamloops, BC bleached Kraft pulp mill discharges treated process wastewater to the Thompson River. The River and downstream Kamloops Lake have historically been identified as nutrient sensitive, with phosphorus contributing to algal growth. The BC Ministry of the Environment required that the mill perform a ...

Efficient nitrogen removal for wastewater in compartmentalised activated sludge process

by Inderscience Publishers  (Sep. 17, 2009)

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 ...

Tech-IA floating system introduced in urban wastewater treatment plants in the Veneto region – Italy

by IWA Publishing  (Sep. 16, 2013)

The performance of three integrated wetland treatment plants (horizontal sub-surface flow (h-SSF) and floating treatment wetland (FTW) with differentiated primary treatments) designed for treating domestic wastewater was investigated, monitoring total (TN), nitrate (NO3-N), nitrite (NO2-N) and ammonia nitrogen (NH4-N), total (TP) and phosphate ...

Simultaneous carbon and nitrogen removal from municipal wastewater in full-scale unaerated/aerated submerged filters

by IWA Publishing  (Jan. 16, 2014)

Characterization and evaluation of a biological submerged filter was carried out on a full-scale pilot plant performing removal of biochemical oxygen demand (BOD) and total nitrogen (TN) from pre-treated urban wastewater. The average influent values of BOD5, chemical oxygen demand (COD) and TN were 370, 1,015 and 60 mg/L, respectively. The pilot ...

Assessing the Potential for Nitrification Inhibition at Wastewater Treatment Facilities as a Result of Zinc Othrophosphate Addition to Potable Water Distribution Systems

by Water Environment Federation (WEF)  (Oct. 22, 2006)

ABSTRACTPortions of the greater metropolitan District of Columbia area have water distribution system corrosion problems. This has resulted in elevated levels of heavy metals, in particular lead from some plumbing and service connections. One alternative being considered for corrosion control is the addition of either phosphoric acid ...

Case study – GEM vs DAF, efficiencies of GEM system over dissolved air floatation (DAF)

by Clean Water Technology, Inc.  (Aug. 17, 2012)

Introduction Clean Water Technology, Inc., the creator of the Gas Energy System (GEM), provides the most advanced primary treatment system on the market. The GEM System provides superior reduction of total suspended solids (TSS), biological and chemical oxygen demand (BOD/COD), fats, oils and grease (FOG) and turbidity. Challenge A Frozen Food ...

Biological treatment of pharmaceutical wastewater from the antibiotics industry

by IWA Publishing  (Feb. 26, 2014)

Pharmaceutical wastewater generated by an antibiotics (penicillin) company was treated by aerobic membrane bioreactors (MBRs) and sequencing batch reactors (SBRs). At a low organic loading rate of 0.22 kg-COD m−3d−1, both types of reactors were capable of treating the wastewater such that the treated effluent met the discharge ...

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