FRACTIONATION OF ORGANIC COMPOUNDS IN WASTEWATER FROM MUNICIPAL SEWAGE SYSTEM - COMPARISON OF METHODS

2018 ◽  
Vol 171 (51) ◽  
pp. 25-39
Author(s):  
Małgorzata Makowska ◽  
Aleksandra Sowińska ◽  
Marcin Spychała
Keyword(s):  
Organic Compounds ◽  
Municipal Wastewater ◽  
Statistical Tests ◽  
Particle Separation ◽  
Laboratory Analysis ◽  
Municipal Sewage ◽  
Comparison Of Methods ◽  
Sewage System ◽  
Size Of Particles

The paper presents the overview and characteristics of three different methods of organic compounds determination in wastewater: method according to ATV, respirometric method and method with use of particle separation. The results of laboratory analysis of municipal wastewater composition carried out using each of the described methods are presented. Wastewater derived from sewage collector in Grodzisk Wlkp. The research was performed in 7 series, from October 2013 to May 2014. The results obtained using different methods were compared by statistical tests. The observed differences were the consequence of the contractually assumed coefficients and size of particles and the defects during manual particles separation.

Joint Treatment of Industrial and Municipal Wastewater – Case Project: City of Kotka, Finland

1992 ◽  
Vol 25 (1) ◽  
pp. 83-92
Author(s):  
Pentti Väänänen ◽  
Pekka Pouttu ◽  
Timo Kulmala
Keyword(s):  
Food Industry ◽  
Municipal Wastewater ◽  
Forest Products ◽  
Treatment Method ◽  
Municipal Sewage ◽  
Forest Products Industry ◽  
Efficient Treatment ◽  
National Board ◽  
The City ◽  
Joint Treatment

The National Board of Waters in Finland has proposed a study on the joint treatment of industrial and municipal wastewaters of the City of Kotka. This study is of great interest due to the large forest products industry and food industry in Kotka. All of the wastewaters from the forest products and the food industry and the municipal sewage have been found to be suitable for biological treatment, which makes the joint treatment applicable. An activated sludge process is selected because it takes advantage of the large amount of nutrients in the municipal sewage and it has proved to be the most efficient treatment method for forest industry wastewaters. However, municipal wastewater contains more nutrients than needed for the biological process, which can cause eutrophication problems in the watercourse. To reduce the pollution caused by the nutrients, chemical treatment of the wastewater is also proposed in the joint treatment. It was concluded that the joint treatment of wastewater is economically, technically and environmentally the best way to arrange wastewater treatment for the industry and the city.

scholarly journals The role of wastewater treatment plants in surface water contamination by plastic pollutants

2018 ◽  
Vol 45 ◽  
pp. 00054 ◽  
Author(s):  
Bozena Mrowiec
Keyword(s):  
Wastewater Treatment ◽  
Surface Water ◽  
Water Contamination ◽  
Membrane Filtration ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Point Sources ◽  
Municipal Sewage ◽  
Municipal Wastewater Treatment ◽  
Surface Water Contamination

The aim of this paper was to review the literature data regarding the physico-chemical characteristic of plastic pollutants discharged with municipal sewage, the practical possibility of removing microplastic particles from wastewater during different treatment steps in WWTPs and the problem of surface water contamination within them. Microplastics (the size range of 1 nm to < 5 mm), have been recognized as an emerging threat, as well as an ecotoxicological and ecological risk for water ecosystems. Municipal wastewater treatment plants (WWTPs) are mentioned as the main point sources of microplastics in an aquatic environment. Microplastic particles can be effectively removed in the primary treatment zones via solids skimming and sludge settling processes. Different tertiary treatment processes such as: gravity sand filtration, discfilter, air flotation and membrane filtration provide substantial additional removal of microplastics, and the efficiency of wastewater treatment process can be at a removal level of 99.9%. Nevertheless, given the large volumes of effluent constantly discharged to receivers, even tertiary level WWTPs may constitute a considerable source of microplastics in the surface water.

scholarly journals The Influence of the Poles’ Lifestyle on the Quantity and Quality of Municipal Wastewater

2021 ◽  
Vol 31 (3) ◽  
pp. 265-275
Author(s):  
Ewelina Płuciennik-Koropczuk ◽  
Martyna Myszograj ◽  
Sylwia Myszograj
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Organic Compounds ◽  
Municipal Wastewater ◽  
Personal Care ◽  
Total N ◽  
Qualitative Characteristics ◽  
Total P ◽  
Wastewater Treatment Systems

Abstract The article presents lifestyle as an important factor determining the quantity and quality of municipal wastewater. The characteristic of wastewater in Poland has changed significantly in recent years. The qualitative characteristics of municipal wastewater indicate an increase of organic compounds and in the scope of micro-contaminants identified in them, e.g. nanoparticles, microplastics, pharmaceutical and personal care products or heavy metals. Therefore, the knowledge of parameters such as: BOD5, COD, total N, total P and suspension solids is no longer sufficient for the design and operation of wastewater treatment systems. Comprehensive research in this area is necessary to select those indicators that better describe the characteristics of wastewater.

scholarly journals Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis

2021 ◽  
Vol 8 (12) ◽  
Author(s):  
Zhen-dong Zhao ◽  
Qiang Lin ◽  
Yang Zhou ◽  
Yu-hong Feng ◽  
Qi-mei Huang ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Low Cost ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Influential Factors ◽  
Pollutant Removal ◽  
Municipal Sewage ◽  
Reflux Ratio ◽  
Oxidation Ditch ◽  
Important Challenge

The development of efficient and low-cost wastewater treatment processes remains an important challenge. A microaerobic up-flow oxidation ditch (UOD) with micro-electrolysis by waterfall aeration was designed for treating real municipal wastewater. The effects of influential factors such as up-flow rate, waterfall height, reflux ratio, number of stages and iron dosing on pollutant removal were fully investigated, and the optimum conditions were obtained. The elimination efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH 4 + -N), total nitrogen (TN) and total phosphorus (TP) reached up to 84.33 ± 2.48%, 99.91 ± 0.09%, 93.63 ± 0.60% and 89.27 ± 1.40%, respectively, while the effluent concentrations of COD, NH 4 + -N, TN and TP were 20.67 ± 2.85, 0.02 ± 0.02, 1.39 ± 0.09 and 0.27 ± 0.02 mg l −1 , respectively. Phosphorous removal was achieved by iron–carbon micro-electrolysis to form an insoluble ferric phosphate precipitate. The microbial community structure indicated that carbon and nitrogen were removed via multiple mechanisms, possibly including nitrification, partial nitrification, denitrification and anammox in the UOD.

scholarly journals The Analysis of Residents’ Behavior, The Condition of Ratproofing Houses and Their Effects on the Incidence of Leptospirosis Cases in Ponorogo Regency

2019 ◽  
Vol 11 (3) ◽  
pp. 198
Author(s):  
Hanifah Agda Nursitasari
Keyword(s):  
Protective Factor ◽  
Statistical Tests ◽  
Positive Association ◽  
P Value ◽  
Indirect Contact ◽  
Running Water ◽  
Standing Water ◽  
Sewage System ◽  
Observation Area ◽  
Hands And Feet

Leptospirosis is a disease with high fatality, it is transmitted by animals infected with Leptospira bacteria either through direct or indirect contact. Ponorogo is one of endemic areas to Leptospirosis whereas the incidence of this zoonotic disease reported annually. The purpose of this study was to analyze the behavior of respondents and ratproofing house conditions against the incidence of leptospirosis in Ponorogo Regency. This research was an observational study with case control research design (ratio of 1: 3 with a comparison of the number of cases of 9 participants and control of 27 participants). The data were obtained by observation and interviews using observation sheets and questionnaires as instruments to obtain information about respondents' behavior and the condition of rats-free houses. The results of statistical tests using chi square showed that contact with standing water is significantly associated with the Leptospiroris incidence with OR = 10.0 (p value=0.03, 95% CI = 1,1 – 91,4) and condition of sewage system (SPAL) also significantly associated with OR = 0.10 (p value 0.02;) 95% CI: 0,01 – 0,79). Poor personal habits such as contact with standing water after working has positive association with odds ratio 10 times higher of causing leptospirosis and the condition of house sewage system (SPAL) that are covered by sewage nets to prevent the entry of mice into the house has negative association or a protective factor against the occurrence of leptospirosis. Suggestions that can be given are educating the general public within the observation area about the dangers of leptospirosis and its prevention, improving the diagnostic ability of Leptosirosis in the Primary Health Care (Puskesmas), improving daily residents behavior or habits by rinsing hands and feet in running water using soap, and closing wire gutters to prevent access rat into the house.

scholarly journals Analysis of Risk Assessment in a Municipal Wastewater Treatment Plant Located in Upper Silesia

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 23 ◽  
Author(s):  
Magdalena Łój-Pilch ◽  
Anita Zakrzewska
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Water Distribution ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Municipal Wastewater Treatment ◽  
Human Beings

Nowadays, risk management applies to every technical facility, branch of the economy, and industry. Due to the characteristics of the analyzed wastewater treatment plant and the specificity of the used processes, one must approach different areas individually. Municipal sewage treatment plants are technical facilities; they function as enterprises and are elements of larger systems—water distribution and sewage disposal. Due to their strategic importance for the environment and human beings, it is essential that they are covered by risk management systems. The basic stage of risk management is its assessment. On its basis, strategic decisions are made and new solutions are introduced. Constant monitoring of the operation of a treatment plant allows for assessment of whether actions taken are correct and whether they cause deterioration of the quality of sewage. In our work, we present a method of risk assessment based on historical data for an existing facility and obtained results.

Decontamination of Heavy Metals From Municipal Sewage Sludge (MSS) by Electrokinetic Remediation

2019 ◽  
Author(s):  
A. Ribeiro ◽  
J. Araújo ◽  
A. Mota ◽  
R. Campos ◽  
C. Vilarinho ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Operation Time ◽  
Electrokinetic Remediation ◽  
Permeable Reactive Barrier ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Reactive Barrier

Abstract A large quantity of sludges resulting from the treatment of MWWTP (Municipal Wastewater Treatment Plant) effluent is generated annually following the increase of population density and acceleration of urbanization. Sludge production in Europe has been predicted by around 12 million tons in 2020. As a solid waste, appropriate disposal of Municipal Sewage Sludge (MSS) has been taken seriously due to its larger volume and toxic substances such as heavy metals. Electrokinetic remediation has more advantages in heavy metals uptake compared to other technologies, due to the ability to treat soils in-situ and to remove heavy metals from soils. In this work, it was studied the remediation of MSS by the electrokinetic remediation coupled with activated carbon (AC) as a permeable reactive barrier (PRB). It was applied an electric current of 3 V cm−1 and it was used an AC/sludge ratio of 30 g kg−1 of contaminated sludge for the preparation of the PRB. In each trial, the evolution of cadmium (Cd), lead (Pb), copper (Cu), chromium (Cr), nickel (Ni) and zinc (Zn) removal from the sludge were evaluated. Results proved that this process is perfectly suited for the removal of chromium, nickel and zinc metals from the sludge. At the end of the operation time, it was achieved a maximum removal rate of 56% for chromium, 73% for nickel and 99% for zinc, with initial concentrations of 2790 mg kg−1, 2840 mg kg−1, and 94200 mg kg−1, respectively. Based on these results, it was proved the technical viability of the proposed technology (electrokinetic with AC as a permeable reactive barrier) to treat municipal sewage sludges.

Predicting the Fate of Volatile Organic Compounds in Municipal Wastewater Treatment Plants

1992 ◽  
Vol 25 (4-5) ◽  
pp. 383-389 ◽  
Author(s):  
H. Melcer ◽  
J. Bell ◽  
D. Thompson
Keyword(s):  
Volatile Organic Compounds ◽  
Activated Sludge ◽  
Organic Compounds ◽  
Pilot Plant ◽  
Municipal Wastewater ◽  
Dynamic Models ◽  
Treatment Plant ◽  
Full Scale ◽  
Volatile Organic ◽  
Plant Data

Pilot plant and full scale investigations were carried out to determine the fate of selected volatile organic compounds (VOCs) in activated sludge aeration basins. Treatability parameters for each VOC were estimated from these investigations and used to calibrate TOXCHEM, computer-based steady state and dynamic models developed to predict the fate of VOCs in municipal activated sludge systems. The pilot plant was fed with wastewater from two different municipal sources. It was operated in parallel with a municipal treatment plant and was found to adequately simulate the performance of the full scale plant. Data suggest that the current models, calibrated with pilot plant data, may produce useful predictions of the fate of VOCs in full scale plants.

scholarly journals The bottlenecks and causes, and potential solutions for municipal sewage treatment in China

2020 ◽  
Vol 15 (1) ◽  
pp. 160-169 ◽  
Author(s):  
Yeshi Cao ◽  
M. C. M. Van Loosdrecht ◽  
Glen. T. Daigger
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Urban Areas ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Integrated Design ◽  
Cost Effective ◽  
Municipal Sewage ◽  
Municipal Wastewater Treatment

Abstract Since about the 1990s China has achieved remarkable progress in urban sanitation. The country has built very extensive infrastructure for wastewater treatment, with 94.5% treatment coverage in urban areas and legally mandated nation-wide full nutrient removal implemented. However, municipal wastewater treatment plants (WWTPs) in China are still confronted with issues rooted in the unique sewage characteristics. This study compares energy recovery, cost of nutrient removal and sludge production between Chinese municipal WWTPs and those in countries with longer wastewater treatment traditions, and highlights the cause-effect relationships between Chinese sewage characteristics – high inorganic suspended solids (ISS) loads, and low COD and C/N ratio, and municipal WWTP process performance in China. Integrated design and operation guidelines for municipal WWTPs are imperative in relation to the unique sewage characteristics in China. Cost-effective measures and solutions are proposed in the paper, and the potential benefits of improving the sustainability of municipal WWTPs in China are estimated.

Sign in / Sign up

Export Citation Format

Share Document