Sewage Pumping Station Research Articles

Hygienic assessment of conditions of the exploitation of facilities of the urban drainage system

The aim of the study was the hygienic characteristics of the location of sewage pumping stations (SPSs) in the residential area of the city and the assessment of working conditions for the staff. The features of the technological process at the SPSs resulted in the formation of specific working conditions characterized by the presence of a cooling microclimate, noise production, technological vibration, air pollution by microorganisms. The assessment of working conditions has allowed to refer them to the 3 class (harmful working conditions) of the 2 and 3 degree. Preventive measures for SPSs should include the use of equipment for cleaning the air of working zone, having a combined odourremoving and microbicidal action; the automation of the labor process; the installation of additional equipment for filtering air circulating in workplaces and emitting into the atmosphere; provision of sealing equipment with the use of noise insulating materials.

Influent Flow Rate Effect On Sewage Pump Station Performance Based On Organic And Sediment Loading

The performance of sewage pumps stations affected by many factors through its work time which produce undesired transportation efficiency. This paper is focus on the use of artificial neural network and multiple linear regression (MLR) models for prediction the major sewage pump station in Baghdad city. The data used in this work were obtained from Al-Habibia sewage pump station during specified records- three years in Al-Karkh district, Baghdad. Pumping capability of the stations was recognized by considering the influent input importance of discharge, total suspended solids (TSS) and biological oxygen demand (BOD). In addition, the chemical oxygen demands (COD), pH and chloride (Cl). The proposed model performance has compared with the correlation coefficient (r). The suitable structure design of neural network model is examined through many trials, error, preparations and evaluation steps. Two prediction models of organic and sediment loading are presented. Result found that the estimating of the organic and sediment loading by ANN model could be successful. Moreover, results showed that influent discharge rate have more effect on organic and sediment loading predicting to other parameters.

Selection framework for the treatment of sewer network emissions

Increasing urban growth and lifestyle expectations have led to an increase in public complaints against odours from sewer infrastructure. Gas phase odour abatement in sewer networks, particularly at sewer pumping stations, is most commonly achieved by using biofilters, biotrickling filters or activated carbon filters. When odour complaints are received, a typical response is to close vents, leading to biogenic corrosion in sewers, which increases operating costs. A three-year study of the performance of odour control systems has allowed a comparison of the removal efficiency for the most common treatment systems. An analysis of the treatment system robustness has also been conducted. It has been found that biofilters, biotrickling filters and activated carbon all remove hydrogen sulfide and methyl mercaptan, however residual odours can still lead to complaints particularly during ‘spikes’ of the inlet, where a particular compound's inlet concentration is high. This analysis has led to an odour abatement technology selection flowchart being proposed for the treatment of sewer network emissions.

Sanitary Protection Zones of Sewage Waste-Disposal Plants and Their Justification

Sanitary protection zone (SPZ) are established around sources of negative impact on environment and human health. Such sources include sewage waste-disposal plants and sewage pumping stations. Existing specification documents overlook some points in the establishment of SPZ. As watsewater treatment plants construction take places in cramped conditions it is necessary to justify their reduction. The paper describes experience of such a reduction and offers additions to specification documents.

Features of operation of sewage pumping stations of heat and power stations in in conditions the Far North

Introduction. The subject of the study is the study of technologies to ensure the reliability of sewage pumping stations (SPS), exploited in the Far North. One of the most important problems is the freezing of water in the SPS tanks, associated with the incorrect selection of the insulation of the SPS of new TPPs, as well as the deterioration of the insulation of the SPS under the influence of aggressive media on the old TPPs. As a solution, the article considers two main methods of internal heating: liquid and electric. Both methods were analyzed using the example of the Yakutsk State District Power Plant-2, where the disruption of the drainage system may lead to a station shutdown. Materials and methods. The purpose of the study was a comparative analysis and selection on the basis of a feasibility study of the most reliable method of heating the pumping unit of the Yakutsk State District Power Plant-2, exposed to low temperatures and, as a consequence, the freezing of wastewater in tanks. On the basis of field surveys and the processing of their results using mathematical statistics, the causes of the problem of water freezing in the SPS units at Yakutsk State District Power Plant-2 were studied and analyzed. Technological characteristics of the installed SPS were also analyzed, heat engineering calculations were performed, economic indicators were calculated, and further solutions to the problem under consideration were determined. Results. Analysis of the technical parameters and configuration of the SPS showed that the installed insulation and the heating system do not correspond to the territorial conditions in which this equipment is installed. To bring the SPS into working condition, two solutions for internal heating of tanks were developed and their comparative analysis was performed. Selected heating option with heating cable. This system has been successfully implemented and is operating normally. Conclusions. The results of the work can be used to repair thermal insulation and install a heating system for industrial pumping stations without using earthworks in the conditions of the Far North and on the territory of permafrost soils.

Implementation of an IoT Based Radar Sensor Network for Wastewater Management.

Critical wastewater events such as sewer main blockages or overflows are often not detected until after the fact. These events can be costly, from both an environmental impact and monetary standpoint. A standalone, portable radar device allowing non-invasive benchmarking of sewer pumping station (SPS) pumps is presented. Further, by configuring and deploying a complete Low Power Wide Area Network (LPWAN), Shoalhaven Water (SW) now has the opportunity to create “Internet of Things” (IoT)-capable devices that offer freedom from the reliance on mobile network providers, whilst avoiding congestion on the existing Supervisory Control and Data Acquisition (SCADA) telemetry backbone. This network infrastructure allows for devices capable of real-time monitoring to alert of any system failures, providing an effective tool to proactively capture the current state of the sewer network between the much larger SPSs. This paper presents novel solutions to improve the current wastewater network management procedures employed by SW. This paper also offers a complete review of wastewater monitoring networks and is one of the first to offer robust testing of Long Range Wide Area Network (LoRaWAN) network capabilities in Australia. The paper also provides a comprehensive summary of the LoRa protocol and all its functions. It was found that a LPWAN, utilising the LoRaWAN protocol and deployed appropriately within a geographic area, can attain maximum transmission distances of 20 km within an urban environment and up to 35 km line of sight.

EVALUASI KINERJA SISTEM RBC DI IPAL LAMBUNG MANGKURAT: PENGARUH VARIASI WAKTU TINGGAL TERHADAP EFISIENSI PENURUNAN KADAR BOD

Saat ini, pengelolaan terhadap sanitasi khususnya air limbah domestik menjadi kebutuhan yang sangatcrusial. IPAL Lambung Mangkurat menerapkan teknologi Rotating Biological Contactor (RBC) sebagaipengolahan air limbahnya. RBC merupakan salah satu pengolahan sekunder yang memanfaatkanmikroorganisme untuk menguraikan bahan organik yang terdapat di dalam air limbah. Penelitian inibertujuan untuk melakukan evaluasi terhadap kinerja RBC di IPAL Lambung Mangkurat dan pengaturanvariasi waktu tinggal untuk mengetahui pengaruhnya terhadap efisiensi pengolahan RBC dalam menurunkankadar BOD. Evaluasi terhadap kinerja RBC tersebut dilakukan dengan mengukur kondisi sebelum dansesudah perlakuan. Perlakuan variasi waktu tinggal dilakukan dengan cara mengatur pompa pengontrol padabak RSPS dengan valve pada pipa inlet bak pengendap pertama. Nilai tipikal waktu tinggal diambil dari nilaiyang paling kecil (0,7 jam), nilai tengah (1,1 jam) dan nilai paling besar (1,5 jam). Hasil dari penelitian ini,pada kondisi eksisting debit air limbah yang diolah di RBC berkisar 530,713 m3/hari - 615,385 m3/haridengan waktu tinggal antara 0,7-4 jam yang tergantung dari waktu pompa. Adanya perlakuan variasi waktutinggal memberikan pengaruh terhadap efisiensi penurunan kadar BOD. Waktu tinggal yang menurunkankadar BOD paling besar yaitu 1,5 jam.

Potential threat to Polish lakes and reservoirs from contamination by objects of environmental flood risk

Abstract There is a potential threat to lakes and water reservoirs from contamination released due to the flooding of objects that can pose an environmental risk (cemeteries, sewage treatment plants, sewage pumping stations, landfills and industrial plants) located in areas prone to inundation. The analysis covered large lakes and reservoirs (those with the area of over 50 ha), identified as bodies of surface water located in areas potentially affected by flooding of high (10%), medium (1%) and low (0.2%) probability of occurrence. These areas are presented on flood hazard maps and flood risk maps. The results of analyses revealed that the scale of potential threat to Polish lakes, defined as bodies of surface water, with contamination from objects of environmental flood risk is marginal, however, in the case of reservoirs – significant.

Specialized Method of Calculating Heat Input from Wastewater in the Premises of the Sewage Pumping Stations

Modern sewage plant is a complex engineering structure with a different configuration of functional sectors (zones). The inlet sections to the pumps operate in a gravity flow mode, characterized by incomplete filling of the section with water, based on the requirements of non-absorption of ventilation safety for the resulting gas, mainly methane. As the liquid and gas have a higher temperature than the air temperature in the premises of the pumping stations. The problem of heat flow from the fluid have to be solved by a specially designed method that takes into account the separation of gas and liquid flows in pipes and rectangular channels by applying the theory of similarity, criteria equations and computational experiment. An important circumstance in the structure of the algorithm of the calculation is finding and using the concept of the wetted perimeter, as well as newly introduced in the article the concept of the average heat transfer coefficient with respect to the specific configuration of each element partially filled with liquid. Pumps and pipes after them as usual completely filled with water, but here in turn, we have to consider a special form of surfaces of equipment and fittings drainage systems.

Real-time prediction of rain-impacted sewage flow for on-line control of chemical dosing in sewers

Chemical dosing is a commonly used strategy for mitigating sewer corrosion and odour problems caused by sulfide production. Prediction of sewage flow variation in real-time is critical for the optimization of chemical dosing to achieve cost-effective mitigation of hydrogen sulfide (H2S). Autoregressive (AR) models have previously been used for real-time sewage prediction. However, the prediction showed significant delays in wet weather conditions. In this paper, autoregressive with exogenous inputs (ARX) models are employed to reduce the delays with rainfall data used as model inputs. The model is applied to predicting sewage flows at two real-life sewage pumping stations (SPSs) with different hydraulic characteristics and climatic conditions. The calibrated models were capable of predicting flow rates in both cases, much more accurately than previously developed AR models under wet weather conditions. Simulation of on-line chemical dosing control based on the predicted flows showed excellent sulfide mitigation performance at reduced cost.

Erosion characteristics of raw sewage: investigations for a pumping station in northern Germany under energy efficient pump control.

Flow controlled sewage pumping stations offer high potential for energy savings. But along with a reduced flow velocity, flow-controlled pumping increases the risk of deposits formation. This work presents an experimental procedure to assess the erosion behaviour of municipal wastewater as a basis for solid transport characterization considering an energy efficient pump control. Raw sewage, sampled at the inflow channel to a pumping station in the city of Rostock (northern Germany), has been investigated under dry weather inflow conditions by means of a self-constructed laboratory-scale erosion measurement. Received data have been processed into critical bed shear stress points (for incipient erosion and total resuspension) and into erosion rates. Both bed shear stress points increase with the settling duration, from initially 0.016 N/m2 (incipient erosion) and 0.2 N/m2 (total resuspension) after 20 minutes settling, to respectively 0.14 N/m2 and 1 N/m2 after 3 days settling. With a reduced flow rate within the energy efficient control, the pump pauses decrease, from 64 min (regular control with higher flow rate) down to 20 min. Thus, both respective bed shear stress points are below the bed shear stress level of the energy saving control (0.2 N/m2), and a resuspension of the settled particles is guaranteed.

Going on a Field Trip: Critical Geographical Walking Tours and Tactical Media as Urban Praxis in Sydney, Australia

Going on a Field Trip: Critical Geographical Walking Tours and Tactical Media as Urban Praxis in Sydney, Australia

Selection of the Most Optimum Sps Pump Equipment to Solve the Problem of the Stormwater Drainage System in Pervomaisky District of Izhevsk

В данной работе рассматривается проблема затопления подвалов жилых домов и приусадебных участков в Первомайском районе г. Ижевска. Ежегодно в весенний период жители района сталкиваются с этой проблемой. Это приводит к ослаблению здоровья человека и к финансовым затратам по восстановлению строительных конструкций. Для решения проблемы предложено проектирование сети ливневой канализации. По данному рельефу местности предусмотрена пересеченная схема с расположением уличных коллекторов перпендикулярно реке Иж. Это позволит дождевым и талым водам собраться в главном коллекторе, а затем с помощью канализационной насосной станции попасть на очистные сооружения для сброса вод в реку. Для эффективной работы станции производится сравнительный подбор насосного оборудования. В статье рассмотрены основные модификации насосов. По полученным характеристикам ведется подбор насосного оборудования с помощью программ Grundfos Product Center и Wilo-Select. Полученные графики позволяют наглядно увидеть эффективность работы насосов. Цель проектирования - выбрать самое эффективное и оптимальное насосное оборудование. По данным техническим характеристикам видно, что КПД подобранных насосов незначительно отличаются друг от друга. Исходя из преимуществ и недостатков насосов можно сделать вывод: на сегодняшний день погружные насосы являются оптимальным выбором для КНС.

Calculation of water environmental capacity and pollutant sharing rate with water diversion: a case study of Qinhuai River

AbstractWith an overall consideration of hydrology, water quality and pollution sources, and the pollution source area, which affect the water quality, the Qinhuai River basin has been simplified as a control unit. Based on the establishment of the control unit water environmental model, the most unfavorable hydrological condition has been set up. The model comprehensively considers the effects of boundary water quality and the response relationship between the water quality of a cross-section and the general population. The allowable discharge of each generalization outfall can be calculated by the response relationship, and the chemical oxygen demand (COD), NH3-N, and total phosphorus (TP) water environment capacity of the control unit can be obtained. As shown in the results: in the near future (2017–2019) with 35% sewage interception and 30 m3/s water diversion; in the long term (after 2020) with 82% sewage interception, the water quality can reach the standard. Combined with the measured calculation, the paper also has made a quantitative analysis of the sharing rate of the main tributary and sewage pump station pollutant flux in the control unit and the whole basin within the administrative district.

Statistical modelling of Fat, Oil and Grease (FOG) deposits in wastewater pump sumps

The accumulation of FOG (Fat, Oil and Grease) deposits in sewer pumping stations results in an increase in maintenance costs, malfunctioning of pumps and, a potential increase of wastewater spills in receiving open water bodies.It is thought that a variety of parameters (e.g. geometry of the pump sump, pump operation, socioeconomic parameters of the catchment) influences the built-up of FOG. Based on a database containing data of 126 pumping stations located in five Dutch municipalities a statistical model was built. It is shown that 3 parameters are most significant in explaining the occurrence of FOG deposits: mean income of the population in a catchment, the amount of energy (kinetic and potential) per m3 per day and the density of restaurants, bars and hotels in a catchment. Further it is shown that there are significant differences between municipalities that can be traced back to the local ‘design paradigm’. For example, in Amsterdam, the design philosophy of discharging in the pump sump under the water surface (and hence maintaining a low level of turbulence in the pump sump) results in an increase of the probability of the formation of FOG.

ENERGY SAVING OF WASTEWATER PUMPING USING PROPOSED INTEGRATED DRIVE SYSTEMS

An integrated drive arrangement for a wastewater pumping system was designed and modeled to evaluate the energy saving gained from matching motors with Variable Frequency Drive (VFD) and Programmable Logic Controller (PLC). The proposed arrangement utilizes the affinity laws of centrifugal pumps to predict the performance of a pump under different rotational speed conditions. The specific energy (Es) is used as a measure of the cost effectiveness of the proposed pumping system. Results have shown that a reduction of 10% in pump speed can save 30% in energy of maximum speed. The energy saving potential is carried out for a real-life case study, and a conclusion to replace on-off controllers currently used for most wastewater pumping systems is necessary. The total energy saving account for more than 50% when integrated drive system was applied for a combined sewer pump station.

Cost-Effectively Upgrading an Old, Combined Sewer Pump Station

Cost-Effectively Upgrading an Old, Combined Sewer Pump Station

Energy use and carbon footprint for potable water and wastewater treatment

Abstract Wastewater treatment plants (WWTPs) and drinking water treatment plants (DWTPs) are sources of emissions of greenhouse gases (GHGs), such as carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4). Carbon dioxide emissions have a big contribution to climate change. In general they come from burning fossil fuels to generate the electricity necessary for operating the treatment processes. The demand of energy depends on the treatment processes, but also on the quality of water source or wastewater influent. Water companies have to continuously supply safe drinking water to population and to treat and discharge wastewater according to regulations at a cost as low as possible. In Romania reporting of GHGs is not mandatory for water companies. Evaluation of GHG emissions from water industry have become a subject of great interest because of concern regarding climate change. Research and regulation have been conducted by different authors based on a regional basis. This paper proposes to estimate and compare the carbon emissions resulting from power consumption of Constanta South WWTP and PALAS Constanta DWTP. The energy supplier is different for these plants. In order to calculate the carbon emissions the amount of specific CO2 emissions is determined. The contribution of each primary source to produce the amount of electricity which is consumed is taken into account. WWTP has high power consumption in biological processes, because there are the aeration tanks, the sewage pumping station and the equipment for sludge. DWTP has high power consumption because of the pumping equipment used for raw water abstraction from deep wells and those for drinking water distribution to consumers. In order to identify, sort and display possible causes of the high power consumption of WWTP, Ishikawa chart is used. Through its configuration, the diagram allows highlighting and prioritizing the causes which generate this effect. Some management options are presented in order to reduce power consumption in WWTP.

Framework for Enhanced Stormwater Management by Optimization of Sewer Pumping Stations

AbstractControl and reduction of pollution from stormwater overflow is a major concern to be addressed by municipalities in order to improve the quality of the receiving water bodies and the enviro...

Utilizing the Hazard Mitigation Grant Program to Improve Sewer Pump Station Resiliency

Utilizing the Hazard Mitigation Grant Program to Improve Sewer Pump Station Resiliency