phosphorus removal Articles

  • Effect of phosphorus concentration on phosphorus removal and biomass

    Membrane bioreactor (MBR) process was employed to study the effect of biological phosphorus removal (bio-P removal) and P-content in treated sludge with increased phosphorus concentration present in the wastewater. Further, the following four test fractions of raw wastewaters was obtained having different P-concentrations viz., run 1: P-20 mg/L, run 2: P-40 mg/L, run 3: P-60 mg/L, run 4: P-80 ...


    By IWA Publishing

  • Phosphorus removal using nanofiltration membranes

    A high concentration of phosphorus in wastewater may lead to excessive algae growth and de-oxygenation of the water. In this work, nanofiltration (NF) of phosphorus-rich solutions is studied in order to investigate its potential in removing and recycling phosphorus. Wastewater samples from a pulp and paper plant were first analyzed. Commercial membranes (DK5, MPF34, NF90, NF270, NF200) were ...


    By IWA Publishing

  • Enhancing biological phosphorus removal with glycerol

    An enhanced biological phosphorus removal process (EBPR) was successfully operated in presence of acetate. When glycerol was substituted for acetate in the feed the EBPR process failed. Subsequently waste activated sludge (WAS) from the reactor was removed to an off-line fermenter. The same amount of glycerol was added to the WAS fermenter which led to significant volatile fatty acids (VFA) ...


    By IWA Publishing

  • Effects of composting on removal of nitrogen, phosphorus, and potassium

    A six month study evaluated composting affects on nitrogen (N), phosphorus (P), and potassium (K) leaching from hardwood and furniture sawdust amended with 20% and 30% chicken litter. Toxicity Characteristic Leaching Procedure (TCLP) was obtained from substrates. Moisture was provided through precipitation, and the substrate was aerated once or twice per week, depending on the amount of rainfall. ...


    By BioCycle Magazine

  • Removal of phosphorus from wastewaters by biomass ashes

    Removal batch assays of phosphates from a synthetic wastewater (SWW) and a pulp and paper mill wastewater (PPWW) with two forestry biomass ashes were performed. The supernatants were not only chemically characterized but also the ecotoxicity was determined using two organisms: Vibrio fischeri and Artemia franciscana. The addition of fly ash and bottom ash to the SWW in ...


    By IWA Publishing

  • Critical Role of Aerobic Uptake in Biological Phosphorus Removal

    ABSTRACTThe use of biological phosphorus removal (BPR) to remove phosphorus (P) from municipal wastewaters is well-established, and especially in recent years, there has been a significant increase in the number of utilities practicing BPR. The basic BPR mechanism includes two distinct steps: anaerobic P release, and aerobic P uptake. However, BPR design and optimization efforts have typically ...

  • Chemical Phosphorus Removal from Onsite Generated Wastewater

    ABSTRACT Phosphorus originating from onsite generated wastewater is becoming recognized as a major cause of impairment to streams and lakes. Efficient, low maintenance technologies are needed to reduce discharge levels. Removing phosphorus using luxury uptake or precipitation followed by settling, as is common at municipal wastewater treatment plants, is not practical for onsite generated ...

  • High-Level Biological Phosphorus Removal Failure and Recovery

    ABSTRACTThe Durham Advanced Waste Treatment Facility AWTF treats wastewater to very low phosphorus levels (median effluent of less than 0.1 mg P/L) using a combination of biological phosphorus removal followed by tertiary treatment with alum. Historically, the biological phosphorus removal process has shown a relatively high level of instability. Testing was done during summer 2005 to determine ...

  • Enhanced phosphorus removal by microbial-collaborating sponge iron

    The collaborative and mutually reinforcing phosphorus removal in domestic wastewater in a sponge iron and microorganisms system was studied through a laboratory and a pilot scale experiment. The results showed that the total phosphorus concentration of the effluent of less than 0.5 mg/L could be achieved. The results also support that the biochemical reaction accelerated the iron ...


    By IWA Publishing

  • Enhanced Biological Phosphorus Removal within Membrane Bioreactors

    Several Membrane Bioreactor (MBR) facilities have been constructed with the intent of providing Enhanced Biological Phosphorus Removal (EBPR), and several additional such plants are being designed and constructed. Full-scale plant information is now available for process designers to better understand the unique design and operating issues associated with the incorporation of EBPR designs in ...

  • Inhibitory effect of copper on enhanced biological phosphorus removal

    Copper inhibition of enhanced biological phosphorus removal (EBPR) was examined in batch experiments under anaerobic and aerobic conditions. Inhibition was represented by both acetate uptake and phosphorus release coefficients under anaerobic conditions, and by a phosphorus uptake coefficient under aerobic conditions. The results showed that copper inhibition of EBPR occurred mainly during ...


    By IWA Publishing

  • Improvement of phosphorus removal by calcium addition in the iron electrocoagulation process

    Small-scale wastewater treatment plants (SWTPs) are widely used as decentralized wastewater treatment systems in sparsely populated areas of Japan. Iron electrolysis, an electrocoagulation technology, is installed in these SWTPs for phosphorus removal. Phosphorus can be removed via the formation of an insoluble compound containing phosphate and iron, such as FePO4; however, it was necessary to ...


    By IWA Publishing

  • Effect of pH on Carbon and Phosphorus Transformations in Biological Phosphorus Removal with High Propionate and Acetate Wastewater

    Two parallel VIP/UCT configured BNR systems were operated identically except for acidification of anaerobic zone pH in Train 1 (pH=6.5) versus Train 2 (pH=7.2). Lowering anaerobic zone pH decreased anaerobic P release, and observed yields for biomass decreased from 0.38 mgVSS/mgCOD to 0.28 mgVSS/mgCOD. The net implications for EBPR were a higher Pup/Prel ratio, and a higher biomass P content. In ...

  • Nitrification and denitrifying phosphorus removal in an upright continuous flow reactor

    Simultaneous nitrification and denitrifying phosphorus removal was achieved in a single-sludge continuous flow bioreactor. The upright bioreactor was aligned with a biomass fermenter (BF) and operated continuously for over 350 days. This study revealed that unknown bacteria of the Saprospiraceae class may have been responsible for the successful nutrient removal in this bioreactor. The ...


    By IWA Publishing

  • Simultaneous removal of nitrogen and phosphorus by cetylpyridinium bromide modified zeolite

    In this study, surfactant modified zeolite-clinoptilolite (SMZ) by CPB (cetylpyridinium bromide) was used for simultaneous removal of ammonium, nitrate and phosphate in synthetic wastewater, and the sorption properties of SMZ were determined and compared with natural zeolite. Results showed that natural clinoptilolite had good affinity for ammonium (8.940 mg/g), but not for nitrate (0.427 ...


    By IWA Publishing

  • High performance of nitrogen and phosphorus removal in an electrolysis-integrated biofilter

    A novel electrolysis-integrated biofilter system was developed in this study to evaluate the intensified removal of nitrogen and phosphorus from contaminated water. Two laboratory-scale biofilter systems were established, one with electrolysis (E-BF) and one without electrolysis (BF) as control. The dynamics of intensified nitrogen and phosphorus removal and the changes of inflow and outflow ...


    By IWA Publishing

  • Effects of injection of acetic acid and propionic acid for total phosphorus removal at high temperature in enhanced biological phosphorus removal process

    In summer, wastewater treatment plant total phosphorus (TP) removal efficiency is low in South Korea. The reason is because of high temperatures or significant fluctuation of inflow characteristics caused by frequent rainfall. Hence, this study tried to raise TP removal efficiency by injecting fixed external carbon sources in real sewage. Polyphosphate accumulating organisms (PAOs) and glycogen ...


    By IWA Publishing

  • Enhanced Biological Phosphorus Removal Performance of the Traverse City MBR

    ABSTRACT The Traverse City (Michigan) Regional Wastewater Treatment Plant has been successfully converted from a conventional plant into a membrane bioreactor-based facility. When commissioned in July 2004, the plant was the largest Membrane Bioreactor (MBR) facility in North America (32,000 m3/day, 8.5 mgd, during the maximum month). The facility is designed to achieve strict effluent ...

  • Phosphorus removal in low alkalinity secondary effluent using alum

    The alkalinity plays an important role in phosphorus removal using coagulant. The dosage of coagulant in the low alkalinity wastewater is limited due to rapid pH changes. In the present study, a series of jar test was conducted using low alkalinity wastewater (50 mg/L) to evaluate the optimum pH, dosage and performance parameters (slow mixing and settling time) for the common coagulant alum. From ...

  • Evaluation of the role of inherent Ca2+ in phosphorus removal from wastewater system

    The role of inherent Ca2+ in phosphorus removal from wastewater was evaluated by batch tests. Precipitates were characterized by an X-ray diffractometer (XRD), Fourier transform infrared spectrophotometer (FT-IR) and scanning electron microscope with an energy dispersive spectrometer (EDS) system. Effects of inherent Ca2+ on phosphorus removal through basic oxygen furnace slag (BOFS) ...


    By IWA Publishing

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