Ozonation of a Municipal Groundwater Supply and Water Purification Plant Treatment Process Modifications to Prevent Trihalomethane Formation

The City of Sioux Falls, South Dakota obtains its water supply from the Big Sioux aquifer which is located below and adjacent to the Big Sioux River. An extensive well field consisting of 34 wells has been developed to the north of the city. In addition to the well field, two surface water supply intakes in the Big Sioux River diversion channel are available for use during peak demand times of the year. Because the raw water generally has iron concentrations in the range of 3.0 to 6.0 milligrams per liter (mg/1) and manganese concentrations in the range of 2.0 to 2.6 mg/1, the Sioux Falls treatment process has been designed primarily to remove iron and manganese. The Sioux Falls Water Purification Plant treatment process presently employs prechlorination, lime softening, flocculation, recarbonation, chlorination, fluoridation, and filtration. A detailed description of the treatment process is presented in the Methods and Materials section. Based upon plant operations records, the finished water which is delivered to the Sioux Falls general public conforms to the United States Public Health Service (USPHS) recommended standards. Preliminary analyses conducted by the plant staff in 1980 revealed that the Sioux Falls water distribution system TTHM levels ranged from 50 to 115 ug/1 while raw well water samples revealed undetectable TTHM levels. Therefore, it appears that the trihalomethanes were formed as a result of the water treatment process utilized at the Sioux Falls Water Purification Plant. The purpose of this investigation was to determine the feasibility of using ozone prior to chlorine addition for preventing trihalomethane formation, for reducing chlorine demand, and for disinfection. Pilot-scale ozone and filter units were utilized in this investigation to avoid any disruption in the treatment plant operation. The filter media employed during the pilot studies was identical to that utilized at the Sioux Falls Water Purification Plant. Further studies were conducted to determine the effects on trihalomethane formation in the distribution system by altering the point of chlorine addition in the Sioux Falls Water Purification Plant treatment process

High throughput biofiltration for odour control at water purification plant

[Abstract] A high throughput trickling biofilter for odour control was designed basing on the principles of biotrickling filter technology developed in Moscow Bakh Institute of Biochemistry. All the necessary blocks except a fan: temperature and humidity control unit, a biofilter bed, an irrigation system, a control block and display unit are combined within one compact biofiltration module – a standard container 6000x2400x2400 mm. The plant is thermo-insulated that enables outdoor installation. The biofilter is easily scaled up by adding extra filtration beds. A typical biofiltration module rated for 5,000-10,000 m3/h has a contact time of 3-6 s (biofilter bed total volume – 10.5 m3) and a maximum footprint of 14.5 m2. After extensive pilot plant studies the first 5000 m3/h trickling biofilter easily scalable to 20000 m3/h was installed at Moscow Water Works in spring 2007 to control odour emissions - hydrogen sulfide, mercaptanes and other malodorous volatile organic compounds in up to 60 mg/m3 concentration. The performance results of the industrial biofilter are discusse

Design, automation and remote management of a water purification plant

This study presents a water purification plant that uses the waste cake from the process of oil extraction of Moringa oleifera seeds. The particularity of this purification plant is that it should be autonomous to work in isolated areas. To do so, the design counts on solar panels and batteries controlled by a Supervisory Control And Data Acquisition (SCADA) system. The main objective of this study is the design and automation of the purification power plant so it can be used either manually or remotely by means of a web server and a micro controller in charge of data collection and to proceed orders from and to the web platform. In pursue of a cost reduction, caused by the development and implementation of hardware and software, this project is conceived using open source systems. Additionally, the plant counts on an Energy Management System that should optimize the energy consumption of the control system and actuators. This system is designed in such a way that it can be used independently in isolated mode or connected to the grid in regions where local authority regulations allows the connection of energy storage systems to the grid.Peer ReviewedPostprint (author's final draft

Deliberative architecture for smart sensors in the filtering operation of a water purification plant

The increase of applications for industrial smart sensors is booming, mainly due to the use of distributed automation architectures, industrial evolution and recent technological advances, which guide the industry to a greater degree of automation, integration and globalization. In this research work, an architecture for deliberative-type intelligent industrial sensors is proposed, based on the BDI (Belief Desire Intentions) model, adaptable to the measurement of different variables of the filtering process of a water purification plant. An intelligent sensor with functions of signal digitalization, self-calibration, alarm generation, communication with PLC, user interface for parameter adjustment, and analysis with data extrapolation have been arranged. For decision making, the use of fuzzy logic techniques has been considered, which allows imprecise parameters to be appropriately represented, simplifying decision problem solving in the industrial environment, generating stable and fast systems with low processing requirements. The proposed architecture has been modelled, simulated and validated using UML language in conjunction with Petri nets, which facilitate the representation of discrete system events, presenting them clearly and precisely. In the implementation and testing of the prototype, C/C ++ language has been used in an 8-bit microcontroller, experimentally corroborating the operation of the device, which allowed evaluating the behavior of a pseudo-intelligent agent based on the requirements of the water treatment plant, and also through comparisons with similar works developed by other researchers

In Search of His Calling

Career options seem endless for Kemper Scholar Joe Gladow ’14, who interned in the office of Chicago Mayor Rahm Emanuel last summer

Applying a Heuristic Approach for a Minimum-cost Operating Strategy for Tap Water

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchive

Correlation between sedimentation tank design parameter and sedimentation efficiency

Thesis(Master) --KDI School:Master of Public Management,2018.Chapter 1: Introduction Chapter 2: Sedimentation principle and Tank design standard (document analysis) Chapter 3: Case Study Chapter 4: Result and Analysis Chapter 5: Key findings from case study (conclusion)masterpublishedJae Hyun, SO

Quick appraisal of "Sistema de suministro desde el embalse del Cenajo a la Mancomunidad de Canales del Taibilla"

The project under assessment concerns the construction of an aqueduct in order to divert water from Tajo-Segura Channel onto the Cenajo reservoir and to the water purification plants of Sierra de la Espada and of Campotéjar. The main objective is to improve water quality rather than quantit