biological wastewater Articles

  • The biological basis of wastewater treatment

    Introduction This booklet was written to fulfil the need for a simple explanation of the biological processes that underpin wastewater treatment. It attempts to show how the bacteria involved deal with the organic carbon in the sewage. Remarkably, there are just 3 major processes involved, and these mirror exactly the 3 major processes at work in the plant viz: biodegradation, oxygen ...

  • Biological Wastewater Treatment

    Untitled Document The use of microorganisms to remove contaminants from wastewater is effective and widespread. To choose the right system from the many options offered, ...


  • What is biological wastewater treatment?

    Biological wastewater treatment harnesses the action of bacteria and other microorganisms to clean water Biological wastewater treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, it’s a complex, not completely understood process at the intersection of biology and ...


    By Fluence Corporation

  • Application Focus: Biological Wastewater Treatment

    In knowing the size and health of the active biomass population in a wastewater treatment process, cause-and-effect relationships can then be established with process variables. If a change in the process is beneficial or detrimental to the population, ATP results will indicate to what degree the population is helped or harmed by the change. Since ATP measurements isolate the living population, ...


    By LuminUltra Technologies Ltd.

  • Biological wastewater treatment Dalian, China

    To manage the demands set for the plant, a biological treatment with fixed bed was chosen. The water first undergoes pre-treatment by screening and grit/grease removal. Primary sedimentation is done in 4 tanks with lamellar sedimentation.   The first step in the biological treatment consists of BOD, COD and SS ...

  • Biological treatment of pharmaceutical wastewater from the antibiotics industry

    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 regulation except for the total dissolved ...


    By IWA Publishing

  • Treatment of tannery wastewater in a hybrid biological reactor

    A shaft-type hybrid bioreactor treated composite wastewater of a chrome tannery manufacturing 'wet-blue leather'. The sample was treated under suspended growth and then hybrid system with 20 g/L of 5 mm tyre tube beads in batch mode. The continuous study was made under suspended growth and hybrid system with 10-30 g/L of beads. The kinetic coefficients Ks, k, Y and k were 170.83 mg/L, 0.0397 h−1, ...


    By Inderscience Publishers

  • CHIP-tuning for biological wastewater treatment plants

    The demand for efficiency improvement in municipal and industrial wastewater treatment plants (WWTP’s) is increasingly based on problems related to the water quality, process stability and/or insufficient performance in the COD removal and/or nitrification process. New, stricter requirements or the need for higher removal efficiency intensify the demand for optimizing the existing ...


    By Multi Umwelttechnologie AG

  • Is modeling of biological wastewater treatment a mature technology?

    Based on three case studies it is demonstrated that the application of mathematical models in biological wastewater treatment has not yet reached its full potential. Model structure uncertainty and correlation of uncertain parameter values make up the first case. The combination of biokinetic and hydraulic models relates to the second case. The evolution of a full scale plant over its life ...


    By IWA Publishing

  • Biological treatment of ammonium perchlorate-contaminated wastewater: a review

    Absolute reduction of perchlorate has proven complex owing to the diverse characteristics of the perchlorate ion. Technologies such as chemical reduction, ozone/peroxide, nanofiltration, and reverse osmosis have had limited success, high costs and are not environmentally friendly. A great deal of research and reviews on ion exchange and biodegradation have been carried out, but conditions for ...


    By IWA Publishing

  • Treatment of laundry wastewater by biological and electrocoagulation methods

    The present study describes an improvement in the current electrocoagulation treatment process and focuses on a comparative study for the clean-up of laundry wastewater (LWW) after each wash and rinse cycle by biological and electrocoagulation treatment methods. For biological treatment, the wastewater was treated with a Bacillus strain of aerobic bacteria especially suited for the ...


    By IWA Publishing

  • Rotating biological contactor

    A rotating biological contactor or RBC is a biological treatment process used in the treatment of wastewater following primary treatment.[1][2][3][4][5] The primary treatment process removes the grit and other solids ...


    By IWA Publishing

  • A novel control strategy for efficient biological phosphorus removal with carbon-limited wastewaters

    This work shows the development and the in silico evaluation of a novel control strategy aiming at successful biological phosphorus removal in a wastewater treatment plant operating in an A2/O configuration with carbon-limited influent. The principle of this novel approach is that the phosphorus in the effluent can be controlled with the nitrate setpoint in the anoxic reactor as ...


    By IWA Publishing

  • The assessment of the coke wastewater treatment efficacy in rotating biological contractor

    Coke wastewater is known to be relatively difficult for biological treatment. Nonetheless, biofilm-based systems seem to be promising tool for such treatment. That is why a rotating biological contactor (RBC) system focused on the Anammox process was used in this study. The experiment was divided into two parts with synthetic and then real wastewater. It was proven that it is possible to treat ...


    By IWA Publishing

  • Fate of Arsenic during Biological Treatment of High Strength Wastewater–Case Study

    The paper presents the results of treatability study on highly contaminated wastewater with phenols (300 mg/l), thiocyanate (210 mg/l), ammonia (800 mg/l) and arsenic up to 11 mg/l. The study was conducted in two sequencing batch reactors (SBRs) using biomass from coke plant. After two months of acclimatization the biomass was able to remove ammonia to below 1 mg/l and phenols and thiocynate ...

  • Vermifilters: a tool for aerobic biological treatment of herbal pharmaceutical wastewater

    Herbal pharmaceutical wastewater possesses high chemical oxygen demand (COD) (21,960–26,000 mg/l) and biochemical oxygen demand (BOD) (11,200–15,660 mg/l) and suspended solids (SS) (5,460–7,370 mg/l). It cannot be directly discharged into surface water bodies, due to its highly biodegradable nature. Herbal pharmaceutical wastewater has been treated by using vermifilter, which is an ecosystem ...


    By IWA Publishing

  • How Shasun maximises the investment in it`s biological wastewater treatment plant

    At the Dudley Shasun facility we have a 7500 m3 biological treatment plant that can treat up to 36 tonnes of waste COD per day. Part of this capacity is utilised to treat up to 15 tankers per day of third party aqueous waste. The waste is very varied, covering everything from leachates at only 2000ppm COD to industrial waste at up to 500,000ppm COD. The Strathkelvin respirometer forms a central ...

  • Electron density-based transformation of trimethoprim during biological wastewater treatment

    This research investigated the biological transformation of trimethoprim (TMP). Partial TMP removal was observed in the presence of ammonia and toluene, and increasing the solids retention time from 20 days to 60 days improved TMP removal in both the nitrifying and heterotrophic bioreactors. Two TMP-related metabolites were identified, the first (5-(3,4,5-trimethoxybenzyl) pyrimidine-2,4-diamine, ...


    By IWA Publishing

  • Enhancing Biological Nutrient Reduction in Advanced Individual Onsite Wastewater Treatment Systems

    ABSTRACTAdvanced onsite systems need to continue to improve wastewater treatment through nutrient reduction. Some advanced onsite systems have been shown to reduce nutrients significantly. However, with modifications, these systems can reduce total inorganic nitrogen (TIN) to an even greater degree, and nitrate to levels below federal drinkingwater standards. INTRODUCTIONNitrogen compounds in ...

  • Biological responses of marine flatfish exposed to municipal wastewater effluent

    There is an increasing concern approximately the presence of pharmaceutical compounds, personal care products, and other chemicals collectively known as contaminants of emerging concern (CECs) in municipal effluents. Yet, knowledge approximately potential environmental impacts related to these compounds is still limited. In the present study, we conducted laboratory exposures that examined ...


    By John Wiley & Sons, Ltd.

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