Ecotoxicological evaluation of the wastewater treatment process of the sewage treatment plant of Thessaloniki, Greece

Sequencing Batch Reactor (SBR) wastewater treatment process has lots of characteristics, such as randomness, time-varying characteristics, complexity and so on. In order to solve the above problems, a predictive PID control method based on DMC and ordinary PID for SBR wastewater treatment process dissolved oxygen (DO) control was proposed. The simulation studies were conducted with the MATLAB in a sewage treatment plant. The results showed that the proposed predictive PID control method was robust and jamproof. Meanwhile, the wastewater treatment system also had a strong capacity of shock load.

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DISPOSAL ALCOHOL WASTEWATER WITHOUT USING THERMAL TREATMENT

Modern Technologies and Scientific and Technological Progress ◽

10.36629/2686-9896-2020-1-43-44 ◽

2020 ◽

Vol 2020 (1) ◽

pp. 43-44

Author(s):

Vadim Krutikov ◽

Ivan Semenov ◽

Dmitriy Dubrovskiy

Keyword(s):

Wastewater Treatment ◽

Thermal Treatment ◽

Treatment Process ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Biological Wastewater Treatment ◽

Wastewater Treatment Process ◽

The Cost

The possibility of withdrawing alcohol wastewater from thermal treatment to a sewage treatment plant was considered in this article. These measures can reduce the cost of fuel used for thermal treatment, as well as improve the quality of the biological wastewater treatment process

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Effect of the rotifer Lecane inermis, a potential sludge bulking control agent, on process parameters in a laboratory-scale SBR system

Water Science & Technology ◽

10.2166/wst.2013.453 ◽

2013 ◽

Vol 68 (9) ◽

pp. 2012-2018 ◽

Cited By ~ 6

Author(s):

Wioleta Kocerba-Soroka ◽

Edyta Fiałkowska ◽

Agnieszka Pajdak-Stós ◽

Mateusz Sobczyk ◽

Małgorzata Pławecka ◽

...

Keyword(s):

Wastewater Treatment ◽

Treatment Process ◽

Sewage Treatment ◽

Treatment Plant ◽

Oxygen Demand ◽

Control Agent ◽

Batch Reactors ◽

Activated Sludge Process ◽

Filamentous Bacteria ◽

Wastewater Treatment Process

The influence of a high density of rotifers, which is known to be able to control filamentous bacteria, on the parameters of an activated sludge process was examined in four professional laboratory batch reactors. These reactors allow the imitation of the work of a wastewater treatment plant with enhanced nutrient removal. The parameters, including oxygen concentration, pH and temperature, were constantly controlled. The experiment showed that Lecane rotifers are able to proliferate in cyclically anaerobic/anoxic and aerobic conditions and at dissolved oxygen concentrations as low as 1 mg/L. In 1 week, rotifer density increased fivefold, exceeding the value of 2,200 ind./mL. The grazing activity led to an improvement in settling properties. Extremely high numbers of rotifers did not affect the main parameters, chemical oxygen demand (COD), N-NH4, N-NO3, P-PO4 and pH, during sewage treatment. Therefore, the use of rotifers as a tool to limit the growth of filamentous bacteria appears to be safe for the entire wastewater treatment process.

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EFISENSI PENGOLAHAN LIMBAH CAIR HOTEL MENGGUNAKAN MOVING BED BIOFILM REACTOR (MBBR)

Jurnal Teknologi Lingkungan Lahan Basah ◽

10.26418/jtllb.v9i2.47491 ◽

2021 ◽

Vol 9 (2) ◽

pp. 051

Author(s):

Dhuhan Dhuhan ◽

Laili Fitria ◽

Ulli Kadaria

Keyword(s):

Wastewater Treatment ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Domestic Wastewater ◽

Quality Standards ◽

Biofilm Reactor ◽

Moving Bed Biofilm Reactor ◽

Wastewater Treatment Process ◽

Moving Bed

Abstract The increase in the number of hotels in Pontianak City has a impact, namely the increase in the generation of wastewater. The hotel wastewater treatment process is widely used by hotels in Pontianak, especially at the Aston hotel, which already has a sewage treatment plant with suspended biological treatment. The processed water often does not meet the quality standards of wastewater which may be disposed of in accordance with PERMEN/LH/68/2016 concerning domestic wastewater quality standards. In this study, the parameters measured were BOD, TSS and pH. The purpose of this study was to determine the efficiency of Aston hotel wastewater treatment using an attached reactorMBBR (moving bed biofilm reactor) with Kaldnes K3 media in reducing BOD and TSS parameters. Growing microorganisms and biofilms on adhesive media for 14 days. Giving Kaldnes K3 adhesive media as much as 30%. Based on the research results of Aston hotel wastewater treatment with attached reactor MBBR able to reduce BOD and TSS parameters. Best lowering efficiency in attached reactor MBBR with the best time of 7 days was able to reduce the BOD parameter from 109.81 mg/L became 7.28 mg/L with an efficiency of 93.37%, and the TSS parameter decreased from the initial concentration of 78 mg/L to 8 mg/L and the efficiency was 89.74%. Keywords : BOD, Kaldnes, Hotel Waste Waste, MBBR, TSS Abstrak Peningkatan jumlah hotel di Kota Pontianak memberi dampak, yaitu meningkatnya timbulan limbah cair. Proses pengolahan air limbah hotel banyak digunakan hotel-hotel di Pontianak. Hotel Aston telah memiliki instalasi pengolahan limbah dengan pengolahan biologi tersuspensi. Air hasil olahannya sering kali belum memenuhi baku mutu air limbah yang boleh dibuang sesuai dengan PERMEN/ LH/ 68/ 2016 tentang baku mutu air limbah domestik. Pada penelitian ini parameter yang diukur yaitu BOD, TSS dan pH. Tujuan dari penelitian ini adalah untuk mengetahui efisiensi pengolahan limbah cair hotel Aston menggunakan reaktor terlekat MBBR (moving bed biofilm reactor) dengan media Kaldnes K3 dalam menurunkan parameter BOD dan TSS. Dilakukan penumbuhan mikroorganisme dan biofilm pada media lekat K3 selama 14 hari. Pemberian media lekat Kaldnes K3 sebanyak 30% dari volume reaktor. Berdasarkan hasil penelitian, pengolahan limbah cair hotel Aston dengan reaktor terlekat MBBR mampu menurunkan parameter BOD dan TSS. Efisiensi penurunan terbaik pada reaktor terlekat MBBR dengan waktu 7 hari, mampu menurunkan parameter BOD dari 109,81 mg/L menjadi 7,28 mg/L dengan efisiensi 93,37 %, dan penurunan parameter TSS dari konsentrasi awal 78 mg/L menjadi 8 mg/L (efisiensi 89,74%). Kata Kunci : BOD, Kaldnes, Limbah Cair Hotel, MBBR, TSS.

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An Engineering Example of Technological Transformation about Wastewater Treatment Plant

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.2324 ◽

2012 ◽

Vol 518-523 ◽

pp. 2324-2327

Author(s):

Jun Feng Wu ◽

Hua Shu Ouyang ◽

Xian Li Wang

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Municipal Wastewater ◽

Treatment Process ◽

Wastewater Treatment Plants ◽

Sewage Treatment ◽

Treatment Plant ◽

Main Process ◽

Municipal Wastewater Treatment ◽

Wastewater Treatment Process

To alleviate the water pollution, the original wastewater treatment process was transformed based on the existing structures. Anaerobic-anoxic-aerobic process (A2/O process) was used as the main process, instead of the original two-stage aeration process (AB process). Pretreatment process and advanced treatment process were strengthened. After transformation, the effluent quality could meet the first class of A standard of the "municipal wastewater treatment plant emission standards" (GB18918-2002) and all the quality indexes of the treated water met the requirements of discharge standard of sewage treatment. The original structures were fully used in this transformation, saving investment, which provided a practical reference for the transformation of the wastewater treatment plants.

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Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

Pollack Periodica ◽

10.1556/606.2020.15.2.13 ◽

2020 ◽

Vol 15 (2) ◽

pp. 142-151

Author(s):

Peter Lukac ◽

Lubos Jurik

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Wastewater Treatment Plants ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Phosphorus Recovery ◽

Anaerobic Sludge ◽

Biological Phosphorus Removal ◽

The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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Possible impact of treated wastewater discharge on incidence of antibiotic resistant bacteria in river water

Water Science & Technology ◽

10.2166/wst.2001.0077 ◽

2001 ◽

Vol 43 (2) ◽

pp. 91-99 ◽

Cited By ~ 79

Author(s):

T. Iwane ◽

T. Urase ◽

K. Yamamoto

Keyword(s):

Wastewater Treatment ◽

River Water ◽

Wastewater Treatment Plant ◽

Treatment Process ◽

Treatment Plant ◽

Treated Wastewater ◽

Resistant Bacteria ◽

Wastewater Discharge ◽

Wastewater Treatment Process ◽

Antibiotic Resistant

Escherichia coli and coliform group bacteria resistant to seven antibiotics were investigated in the Tama River, a typical urbanized river in Tokyo, Japan, and at a wastewater treatment plant located on the river. The percentages of antibiotic resistance in the wastewater effluent were, in most cases, higher than the percentages in the river water, which were observed increasing downstream. Since the possible increase in the percentages in the river was associated with treated wastewater discharges, it was concluded that the river, which is contaminated by treated wastewater with many kinds of pollutants, is also contaminated with antibiotic resistant coliform group bacteria and E.coli. The percentages of resistant bacteria in the wastewater treatment plant were mostly observed decreasing during the treatment process. It was also demonstrated that the percentages of resistance in raw sewage are significantly higher than those in the river water and that the wastewater treatment process investigated in this study works against most of resistant bacteria in sewage.

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Sensitivity analysis of a municipal wastewater treatment plant model

MATEC Web of Conferences ◽

10.1051/matecconf/201925205010 ◽

2019 ◽

Vol 252 ◽

pp. 05010

Author(s):

Paweł Król ◽

Alberto Gallina ◽

Michał Lubieniecki ◽

Tadeusz Uhl ◽

Tadeusz Żaba

Keyword(s):

Wastewater Treatment ◽

Municipal Wastewater ◽

Treatment Process ◽

Biological Process ◽

Treatment Plant ◽

Numerical Procedure ◽

Municipal Wastewater Treatment ◽

Wastewater Treatment Process ◽

Plant Model ◽

The Relationship

Waste management is a crucial process to keep the environment in wholesome conditions. The environmental impact of solid waste and wastewater is reduced through construction of appropriate disposal installations. The objective of wastewater treatment in biological reactors is to control the process of biomaterial growth by aerating the sewage content. The process is complex, as depending on a plenty of parameters. In the last decades an effective numerical model, called the Activated Sludge Model (ASM), has been proposed for describing the biological process. The ASM is implemented in the Benchmark Simulation Model (BSM) that simulates the whole wastewater treatment process. The most important parameters in ASM are the kinetic and stoichiometric coefficients. The former describes rate-concentration dependence. The latter characterises the relationship between the components of chemical reactions taking place in the cleaning process. Above parameters are determined by on-site calibration and their importance is relevant during the development of numeric models. This paper aims to examine the influence of kinetic and stoichiometric parameters on the wastewater treatment process of a plant in Płaszów, Kraków. The analysis is carried out by a sample-based numerical procedure. It highlights the ASM parameters playing a major role in the treatment process. Results obtained from the analysis are important for future validation and optimisation processes.

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Unravelling diversity and metabolic potential of microbial consortia at each stage of leather sewage treatment

RSC Advances ◽

10.1039/c7ra07470k ◽

2017 ◽

Vol 7 (66) ◽

pp. 41727-41737 ◽

Cited By ~ 5

Author(s):

Hebin Liang ◽

Dongdong Ye ◽

Lixin Luo

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Treatment Process ◽

Sewage Treatment ◽

Microbial Consortia ◽

Biological Wastewater Treatment ◽

Metabolic Potential ◽

Ecological Functions ◽

Wastewater Treatment Process ◽

System P

Activated sludge is essential for the biological wastewater treatment process and the identification of active microbes enlarges awareness of their ecological functions in this system.

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Insight into removals of PARAFAC components from dissolved and particulate organic matter in wastewater treatment process by two-dimensional correlation and structure equation modeling

Environmental Sciences Europe ◽

10.1186/s12302-021-00558-z ◽

2021 ◽

Vol 33 (1) ◽

Author(s):

Benxin Yu ◽

Dongping Liu ◽

Jian Wang ◽

Yingxue Sun

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Particulate Organic Matter ◽

Structural Equation ◽

Treatment Process ◽

Treatment Plant ◽

Equation Modeling ◽

Two Dimensional ◽

Wastewater Treatment Process ◽

Insight Into

Abstract Background Most particulate organic matter (POM) cannot be directly degraded in the conventional wastewater treatment, which should be transformed into dissolved organic matter (DOM) through a hydrolysis process. However, non-hydrolyzed POM in the biological treatment can limit treated efficiencies for the wastewater treatment plants (WWTPs) facilities. Hence an operational tool is indispensable for insight into removals of DOM and POM factions in the WWTP. In this study, excitation-emission matrix fluorescence spectroscopy (EEM) combined parallel factor analysis (PARAFAC), two-dimensional correlation (2D-COS) and structural equation modeling (SEM) was employed to evaluate removals of DOM and POM in a wastewater treatment plant. Results Four fluorescence components were identified in DOM and POM substances from the WWTP by EEM combined with PARAFAC, i.e., tyrosine-like (TYLF), tryptophan-like (TRLF), microbial byproduct-like (MBLF), and fulvic acid-like (FALF). In A2/O process, the TYLF and TRLF of DOM were removed to a larger extent than those of MBLF and FALF in anaerobic tank, while TYLF and MBLF of POM were removed to a great extent than those of TRLF and FALF in primary sedimentation and aerobic tanks. By the 2D-COS, a decreasing variation order of DOM fractions in the wastewater treatment process was UV-FALF → MBLF2 → Vis-FALF → TRLF → TYLF, while the decreasing order of POM fractions was Vis-FALF → UV-FALF → MBLF2 → TYLF → MBLF1 → TRLF. SEM revealed that TRLF and TYLF of DOM were degraded by anaerobic microorganism, and TRLF could be transformed partially into FALF. However, TRFL and TYLF of POM were discomposed by aerobic microorganism. Conclusions The 2D-COS and SEM can be practicable tools as EEM-PARAFAC for monitoring DOM and POM in the WWTP. The study could present a theoretical support to improving the retrofit of WWTP and formulating emission standards for organic pollutants.

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