scholarly journals Evaluation of leached metals in recovered aluminum coagulants from water treatment slurry

2016 ◽  
Vol 75 (4) ◽  
pp. 998-1006 ◽  
Author(s):  
Mahmoud M. Fouad ◽  
Ahmed S. El-Gendy ◽  
Taha M. A. Razek
Keyword(s):  
Water Treatment ◽  
Acid Concentration ◽  
Mixing Time ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water And Wastewater Treatment ◽  
Negative Impacts ◽  
Coagulant Recovery ◽  
The Cost ◽  
Iron Manganese

The water treatment industry consumes large quantities of coagulant and produces huge amounts of slurry. The cost of alum used in water treatment, stringent regulations and negative impacts of sludge disposal are the motive to do integrated research studies on the technical feasibility of aluminum coagulant recovery from sludge using acidification. This work studied the leaching of iron, manganese, and chromium as the most extracted metals with aluminum during sludge acidification; furthermore, these metals have a great impact on the recovered coagulants' efficiency and treated water quality. The sludge used was collected from El-Sheikh Zayd water treatment plant in Egypt, then dried and ground; afterward, the effect of acid concentration, sludge mass, temperature, mixing speed and mixing time was studied. In addition, it was noticeable that the efficiency of sulfuric acid in leaching iron, manganese and chromium is higher than that of hydrochloric acid. Also, higher leaching for the three metals was obtained in all the experiments using higher acid concentration, elevated temperature, and rotational speed. Finally, the leached metals in recovered aluminum coagulants will not limit its application to water and wastewater treatment, as their concentrations are still very low if compared with aluminum, even with the highest leaching efficiency.

Optimal use of chlorine in water distribution networks based on specific locations of booster chlorination: analyzing conditions in Mexico

2015 ◽  
Vol 16 (2) ◽  
pp. 493-505 ◽  
Author(s):  
Daniel Hernández Cervantes ◽  
Jesús Mora Rodríguez ◽  
Xitlali Delgado Galván ◽  
Josefina Ortiz Medel ◽  
Martín Rubén Jiménez Magaña
Keyword(s):  
Water Treatment ◽  
Water Distribution ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Booster Chlorination ◽  
The Cost ◽  
Concentration Limits

Water distribution networks (WDNs) could present problems of pathogen intrusion that affect the health of consumers. One solution to diminish this risk is to add more disinfectant to the water at the drinking water treatment plant (DWTP). However, this increases the cost of water treatment and may also cause the formation of trihalomethanes. Mexico has the largest bottled water market in the world. Also, most houses are built with individual storage containers due to intermittent service, which generates a greater residence time of the water before use. This paper shows an alternative to guarantee minimum disinfection along WDNs and diminish the use of disinfectant at the DWTP considering the conditions of water consumption and use in Mexico. We propose a model based on Genetic Algorithms to obtain scenarios where free chlorine is maintained at the minimum permissible concentration throughout the day. In addition, Water Managers could optimize the use of disinfectant by implementing booster chlorination stations (BCSs). The results show that chlorine use could be reduced by 38%, therefore guaranteeing the chlorine concentration limits along the WDN.

High Efficiency Aluminum Coagulant Recovery from Drinking Water Treatment Plant Sludge by Using Ultrasound Assisted Acidification

2013 ◽  
Vol 777 ◽  
pp. 60-64 ◽  
Author(s):  
Lan Yang ◽  
Yi Xuan Han ◽  
Dong Tian Wang
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
High Efficiency ◽  
Treatment Plant ◽  
Sulfuric Acid Concentration ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Drinking Water Treatment Plant ◽  
Coagulant Recovery ◽  
Water Treatment Plant Sludge

In this study, a novel combination of ultrasound with acid for coagulant recovery from drinking water treatment plant sludge (DWTPS) is investigated in view of improving the coagulant recovery efficiencies. Optimal recovery conditions, a sulfuric acid concentration of 2.0 M, an ultrasonic treatment time of 30 minutes, an ultrasound power of 1000 W and stirring speed of 1000 rpm, have been found in the lab test. The aluminum recovery rates from acidification process with assistance of ultrasound increased by approximately 20% compared with that of acidification only. It was found that the synergistic effects between acid with ultrasound contribute to improving the treatment efficiency.

Архитектурный взгляд – продолжение

2019 ◽  
pp. 63-68
Author(s):  
A. Sedov
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Oil Refinery ◽  
Engineering Systems ◽  
Water And Wastewater Treatment ◽  
Optimal Functioning ◽  
Successful Case ◽  
Treatment Facilities

Архитектурным отделом института МосводоканалНИИпроект, кроме создания гармоничного внешнего вида и интерьеров объектов, всегда решаются задачи по созданию логичной и четкой объемнопланировочной структуры зданий, обеспечивающей оптимальное функционирование технологических процессов и инженерных систем, комфортные условия работы персонала. На основе такого подхода за последние 5 лет разработаны и реализованы многочисленные проекты, которые рассматриваются с точки зрения специфических особенностей и требований архитектурного проектирования. Представлены наиболее значимые объекты водоподготовки и водоочистки. Среди них реконструкция Курьяновских и ЮжноБутовских очистных сооружений, строительство сооружений на Западной станции водоподготовки в Москве. Затронут вопрос проектирования на территории Новой Москвы, в частности очистных сооружений в поселке Рогово. Подробно рассматривается увеличивающийся в объеме сегмент проектирования объекты по санитарной очистке города. Среди них ЭкоТехноПарк Калуга. Приведены примеры успешной работы со сторонними организациями, в частности Московским нефтеперерабатывающим заводом, насосноперекачивающей станцией Ховринская.The architecture department of MosvodokanalNIIproject JSC, in addition to designing harmonious appearance and interiors of the facilities always solves the problem of providing for logical and clear spaceplanning structural arrangement of buildings, ensuring the optimal functioning of technological processes and engineering systems, comfortable working conditions for the staff. Based on this approach, for the last 5 years numerous projects have been developed and implemented that are considered in terms of specific features and requirements of architecture design. The most significant water and wastewater treatment projects are presented. Of these there is reconstruction of the Kuryanovo and SouthButovo wastewater treatment facilities in Moscow, construction of water treatment facilities at the Western water treatment plant. The issue of designing wastewater treatment facilities in the territory of New Moscow, in particular, in the village of Rogovo, is touched upon. The expanding segment of designing urban sanitation facilities is considered in detail. Of these are EcoTechnoPark Kaluga. Successful case studies of cooperating with thirdparty contractors, in particular, on the Moscow oil refinery, and the Khovrinskaia pumping station are presented.

scholarly journals Design and assessment of water source alternatives for Mariout 2 water treatment plant extension

2021 ◽  
Author(s):  
Samia A. Aly ◽  
Moamen Elbanouby ◽  
Sadek M. Eladwe
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Source ◽  
Population Increase ◽  
Nile River ◽  
Decision Matrix ◽  
The Third ◽  
Source Selection ◽  
The Cost

Abstract Factors such as population increase and industrialization, coupled with the establishment of touristic villages, have necessitated an upgradation of water treatment plants (WTPs) in Egypt. In this study, three different water source alternatives were designed and compared with a simple decision matrix to select the most appropriate one for upgrading and extending the Mariout 2 WTP. The first two alternatives are located on the k-40 Alex-Cairo desert road and k-77 EL Nasr canal, respectively, where the water source is obtained from the Nile River. The third alternative is located at the k-51 Alex-Matrouh coastal road and a non-conventional seawater source is used. The design results showed that the required energy power of the first, second, and third alternatives were 0.31, 0.066, and 0.72 kw/purified m3, respectively. The operational costs of the first, second, and third alternatives were 0.665, 0.426, and 6.621 EGP/m3, respectively. The cost of the intake pipes was found to be the lowest for the third alternative, whereas it was found to be the highest for the first one. Based on the results obtained from the decision matrix, the third alternative was found to be the most appropriate alternative followed by the second one. This study may assist in making decisions regarding the water source selection and treatment methods for the extension of the fourth stage of the Mariout 2 WTP.

Waterborne Campylobacter in Sweden: the cost of an outbreak

1997 ◽  
Vol 35 (11-12) ◽  
pp. 11-14 ◽  
Author(s):  
Y. Andersson ◽  
B. de Jong ◽  
A. Studahl
Keyword(s):  
Water Treatment ◽  
Tap Water ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waterborne Disease ◽  
Waterborne Outbreak ◽  
Sick Person ◽  
Sick People ◽  
The Cost

Outbreaks of waterborne disease happen in Sweden, as in most other countries. During the period 1980-1995, a total of 90 outbreaks were reported, involving about 50,000 sick people and two deaths. About 80% of the outbreaks are caused by unknown agents but Campylobacter is the most common agent. Between 1980 and 1995, 11 campylobacteriosis outbreaks were reported, three of which had 1,000->3,000 sick people involved. These waterborne outbreaks cost society, the water-treatment plant involved and the sick person a lot of money. A waterborne outbreak also raises the question whether people can have confidence in the community tap water.

Desalination of oil sands process-affected water and basal depressurization water in Fort McMurray, Alberta, Canada: application of electrodialysis

2013 ◽  
Vol 68 (12) ◽  
pp. 2668-2675 ◽  
Author(s):  
Eun-Sik Kim ◽  
Shimiao Dong ◽  
Yang Liu ◽  
Mohamed Gamal El-Din
Keyword(s):  
Water Treatment ◽  
Oil Sands ◽  
Environmental Concern ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Fort Mcmurray ◽  
Inorganic Species ◽  
Conductivity Range ◽  
Industrial Reuse ◽  
The Cost

The high content of inorganic species in water used to extract bitumen from the Alberta oil sands and in the groundwater below the oil sands is an increasing environmental concern. These water matrices require treatment before they can be reused or safely discharged. Desalination of the oil sands process-affected water (OSPW) and groundwater, or basal depressurization water (BDW), can be accomplished with deionization techniques such as electrodialysis (ED). In order to achieve the effective ED treatment, OSPW and BDW were pretreated with coagulation–flocculation–sedimentation to remove solid species and turbidity. We demonstrated that a conductivity range for industrial reuse of OSPW and BDW can be achieved with the ED treatment and showed the possibility of applying ED in the oil sands industry. A continuous ED system that reuses the diluate stream as a source for the concentrate stream was designed. The cost of a hypothetical ED water treatment plant in Fort McMurray, Alberta, was estimated to be C$10.71 per cubic meter of treated water.

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