scholarly journals Investigation of the Wastewater Treatment Plant Processes Efficiency Using Statistical Tools

2020 ◽  
Vol 12 (24) ◽  
pp. 10522
Author(s):  
Dariusz Młyński ◽  
Anna Młyńska ◽  
Krzysztof Chmielowski ◽  
Jan Pawełek
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Probability Distributions ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Gaussian Mixture ◽  
Statistical Tools ◽  
Empirical Distributions ◽  
Akaike Criterion ◽  
Anderson Darling

The paper presents modelling of wastewater treatment plant (WWTP) operation work efficiency using a two-stage method based on selected probability distributions and the Monte Carlo method. Calculations were carried out in terms of sewage susceptibility to biodegradability. Pollutant indicators in raw sewage and in sewage after mechanical treatment and biological treatment were analysed: BOD5, COD, total suspended solids (TSS), total nitrogen (TN) and total phosphorus (TP). The compatibility of theoretical and empirical distributions was assessed using the Anderson–Darling test. The best-fitted statistical distributions were selected using Akaike criterion. Performed calculations made it possible to state that out of all proposed methods, the Gaussian mixture model (GMM) for distribution proved to be the best-fitted. Obtained simulation results proved that the statistical tools used in this paper describe the changes of pollutant indicators correctly. The calculations allowed us to state that the proposed calculation method can be an effective tool for predicting the course of subsequent sewage treatment stages. Modelling results can be used to make a reliable assessment of sewage susceptibility to biodegradability expressed by the BOD5/COD, BOD5/TN and BOD5/TP ratios. New data generated this way can be helpful for the assessment of WWTP operation work and for preparing different possible scenarios for their operation.

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

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.

Life Cycle Assessment of Urban Wastewater Treatment

2014 ◽  
Vol 535 ◽  
pp. 346-349
Author(s):  
Mei Wang ◽  
Ming Yang ◽  
Jun Liu ◽  
Jian Fen Li
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Urban Wastewater ◽  
Urban Sewage ◽  
Urban Wastewater Treatment ◽  
Whole Life Cycle

Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.

Sewage Wastewater Treatment Plant Inverted AAO Process Design

2014 ◽  
Vol 1079-1080 ◽  
pp. 480-483
Author(s):  
Li Wang
Keyword(s):  
Wastewater Treatment ◽  
Process Design ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Structure Design ◽  
Main Task ◽  
The City

The graduation design topic for a sewage treatment plant processesdesign - inverted AAO process in durian. Main task is tantamount to designaccording to the requirement of the nature of the city sewage, sewage, scalepreliminary design to complete sewage treatment plant and single processing structure design.

scholarly journals Percentage of the population connected to a wastewater treatment plan (2008-2012)

2017 ◽  
Author(s):  
Gabin Archambault
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Latin America ◽  
Wastewater Treatment Plant ◽  
Treatment Plan ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
The Pacific ◽  
The Caribbean ◽  
Water Waste

This layer represents the percentage of the population who is connected to a wastewater treatment plan for 36 countries (29 in Europe and North America, 3 in Asia and the Pacific, 3 in Latin America and the Caribbean, and 1 in Africa). However, data are available from 1975 to 2014 for 37 countries. This indicator presents sewage treatment connection rates, i.e. the percentage of the population connected to a wastewater treatment plant. “Connected” means actually connected to a wastewater treatment plant through a public sewage network. It does not take into account independent private facilities, used where public systems are not economic. For more information, visit the OECD database: https://data.oecd.org/water/waste-water-treatment.htm Waste

scholarly journals Designing and Modeling of a Municipal Wastewater Treatment Plant With GPS-X

2022 ◽  
Author(s):  
Fahim Shahriar Sakib
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Design Calculation ◽  
Preliminary Treatment ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant ◽  
State Process

Abstract Wastewater treatment is the process used to remove contaminants from wastewater to produce an effluent suitable for discharge to the environment. Several kinds of wastewater are treated based on the concentration of various parameters. Domestic Wastewater/Municipal Wastewater is treated in Sewage Treatment Plants (STP), which involve various types of processes like physical, chemical and biological to treat the wastewater better. The treatment plant involves five steps of the process – preliminary treatment, primary treatment, secondary treatment, tertiary treatment and sludge treatment to meet the safe disposal guidelines of the department of the environment. In this paper, a municipal wastewater treatment plant for Uttara City is designed and modeled with GPS-X. GPS-X is a wastewater treatment plant modeling software package that is used for verify the treatment process. The design calculation of all unit operations is shown with a specification table. The Process Flow Diagram (PFD), Process Block Diagram (PBD) and mass balance of the process are expressed in the article. The design calculation of the STP is performed with a steady-state process. After each unit operation, the concentration of various parameters – TSS, BOD, VSS, TN is analyzed and the removal efficiency for different equipment is calculated. The STP is designed to maintain the guidelines of the Department of Environment, Bangladesh. At the end of the paper, the designing and modeling steps of a sewage treatment plant will be pursued. Finally, some recommendations are done in the conclusion section.

Management of Toxics for the Fukashiba Industrial Wastewater Treatment Plant of the Kashima Petrochemical Complex

1992 ◽  
Vol 25 (3) ◽  
pp. 247-254 ◽  
Author(s):  
T. Kozawa ◽  
T. Wueki ◽  
H. Kobayashi ◽  
S. Matsui
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Industrial Wastewater ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
High Concentration ◽  
Industrial Wastewater Treatment ◽  
The Public ◽  
Petrochemical Complex ◽  
Slaked Lime

The Kashima petrochemical complex and its Fukashiba industrial wastewater treatment plant are described. When the factories of the complex discharge the wastewater, they must be in compliance with the standards designated in the Sewage Law of Japan, because they are users of the public sewage system. Ten of 81 factories discharged the wastewater containing identified toxics, and they treated corresponding toxic items before discharging to sewers. The wastewater of the factories was constantly monitored by the office of Kashima sewage works, and there had been few troubles with the operation of Fukashiba treatment plant. However, sludge contained cadmium at relatively high concentration in Fukashiba treatment plant, compared with sludge of the domestic sewage treatment plants. The sources of Cd were possibly the use of large amount of slaked lime in these factories. Prior to the construction of any new manufacturing plant, the office of Kashima sewage works practiced the test of biodegradability and toxicity of potential wastewater from the plant. The analytical method of GC/MS became a useful tool to confirm biodegradability and toxicity of substances in the wastewater from each plant.

Startup and operation of a large wastewater treatment plant in warm climate and under modified conditions – a case study

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Sarioglu
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Lessons Learned ◽  
Warm Climate ◽  
Inlet Conditions ◽  
Treated Sewage Effluent ◽  
The City

This study summarizes the findings and lessons learned from the start up and operation of a large wastewater treatment plant in warm climate under modified conditions. The treatment works comprise of a newly constructed sewage treatment plant located in the city of Dubai, U.A.E with an ultimate capacity of 300 Ml/d. The plant can be reviewed in three major parts; (i) liquid stream, (ii) sludge stream and (iii) odor control stream all having the latest state of the art technology and related equipments. The challenge in starting up the plant was related to the fact that only 20% of the flow was available in the form of hauled sewage to be hauled from septic tanks located in various parts of the city and also from the nearby industry which was uncontrollable. Furthermore, some parts of the plant were not ready to be commissioned on the day of the planned startup not to mention that effluent irrigation main was not complete to receive the treated sewage effluent (TSE) from the plant. A comprehensive commissioning plan was implemented and followed during the startup which was tailored according to the actual conditions. The plant commissioning was conducted in a phased sequence to cater for the expected and unexpected changes related to the inlet conditions. Commissioning and operation of the plant was carried for over 18 months with success considering the challenging and difficult conditions.

scholarly journals Assessment of the Effects of Wastewater Treatment Plant Modernization by Means of the Field Olfactometry Method

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2367 ◽  
Author(s):  
Andrzej Kulig ◽  
Mirosław Szyłak-Szydłowski
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Windward Side ◽  
Wastewater Management ◽  
Odor Concentration ◽  
Ex Post ◽  
Before And After

Methodological aspects of odor studies in ex-post analyses for Polish wastewater management facilities were analyzed based on the example of a modernized and enlarged wastewater treatment plant (WWTP) in Mazovia, in the vicinity of the Warsaw agglomeration. It is a mechanical–biological treatment plant with increased efficiency of biogen removal, using activated sludge in the treatment process, with a maximum hydraulic capacity of 60,000 m3/day. Olfactometric research was carried out by means of a method based on identification and characterization of the odor plume emitted from the examined source. This paper presents the results of odor intensity assessment (in sensory examinations according to a 6-stage scale) and odor concentration measurement (using portable field olfactometers) after the completion of the project, and compares them with similar studies conducted before the commencement of the investment. A total of 10 measurement series were carried out before modernization, and 12 after modernization of the WWTP. Odor concentration and intensity were determined, and the current meteorological situation was assessed at the measurement and observation points (receptors) located within the premises (in total 462 points) and around the WWTP (342 points). In each series of measurements on the windward side of the treatment plant, the background of air pollution with odorous substances was marked. The research showed that air flowing into the area of the sewage treatment plant is clean in terms of odor. During the research, basic sources of odor nuisance were identified, and their impact before and after modernization was characterized. The results presented in radar diagrams show changes in the percentage distribution of frequency of occurrence of individual intensity values at receptor points within and outside the area of the treatment plant. After modernization, a significant decrease in the concentration of odor emitted from the sludge dewatering building and sludge containers was determined. The air-tightness of the sewage channel (covered with concrete slabs and sealed) resulted in a significant decrease in the concentration of odor emitted from this source. Waste (in particular, sewage sludge) collected in the emergency waste storage yard was identified as the main source of odor nuisance. The waste, even after modernization, was an emitter of odorous compounds spreading outside the area of the WWTP. Nevertheless, as a result of the investment, the desired effect of reduction of the degree of odor nuisance was achieved.

A Cost Model of Wastewater Treatment Plant in Tianjin

2012 ◽  
Vol 253-255 ◽  
pp. 949-953
Author(s):  
Dong Gang Han ◽  
Xin Hua Zhao
Keyword(s):  
Wastewater Treatment ◽  
Regression Model ◽  
Wastewater Treatment Plant ◽  
Average Cost ◽  
Cost Model ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Construction Operation ◽  
The Cost ◽  
Operation And Management

Basing on the cost data of the wastewater treatment plant (WWTP) in Tianjin, the construction, operation and management cost was calculated. A regression model was developed considering the discount, and the average cost of sewage treatment was calculated. Three price policies were put forward, and the influence of the policies was simulated with the model. The results are powerful tools for government to pricing the wastewater treatment fee

scholarly journals ANALYSIS OF THE MOBILITY OF HEAVY METALS IN SLUDGE FOR THE SEWAGE TREATMENT PLANT IN DALESZYCE

2020 ◽  
Vol 12 (2) ◽  
pp. 85-92
Author(s):  
ROBERT KOWALIK ◽  
JAROSŁĄW GAWDZIK ◽  
BARBARA GAWDZIK ◽  
ALICJA GAWDZIK
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Wastewater Treatment Plant ◽  
Metal Content ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Total Metal Content ◽  
Treatment Processes

Sewage sludge is a by-product of wastewater treatment processes. However, it has high fertilising and soil-forming properties, but it cannot always be used for this purpose. The two main criteria limiting their natural use are heavy metals and parasite eggs. Sewage sludge taken from the Daleszyce wastewater treatment plant has been analysed for heavy metals. For this purpose a space analysis was performed to divide the total metal content into four mobility fractions. The mobility issue determines the ability of an element, or one of its forms, to move in the environment. The studies were performed using a four-stage BCR procedure. The results were analyzed and compared to the limits applicable in Poland for sewage sludge intended for environmental use.

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