A New Approach to Handle Alum Sludge From Water Treatment Plants: Will Continuous Disposal of Alum Sludge Affect Wastewater Operation?

2011 ◽  
Vol 2011 (18) ◽  
pp. 391-399
Author(s):  
Xiaowei Zhang ◽  
Ted Hromada ◽  
Jared Richards
Keyword(s):  
Water Treatment ◽  
New Approach ◽  
Water Treatment Plants ◽  
Alum Sludge

Environmental Effects of Aluminum Used in Water Treatment Plants of Rio de Janeiro State, Brazil

1994 ◽  
Vol 29 (4) ◽  
pp. 571-580
Author(s):  
Jose M. Azcue ◽  
Olaf Malam ◽  
Wolfgang G. Pfeiffer
Keyword(s):  
Water Treatment ◽  
Rio De Janeiro ◽  
River System ◽  
Average Concentration ◽  
World Health ◽  
Water Treatment Plants ◽  
Alum Sludge ◽  
Health Organization ◽  
The City ◽  
Janeiro State

Abstract The effect of the extended use of alum on the concentration of aluminum in water treatment was investigated. Water from the Paraiba do Sul-Guandu River (PSR-GR) system, collected after conventional treatment, was analyzed from the six water treatment plants (WTPs). One of the WTPs, the Guandu WTP, supplies water to the city of Rio de Janeiro (11 million inhabitants) with a flow of 40 m3/s. The concentrations of aluminum found were near and sometimes over the values recommended by the World Health Organization (200 µg/L), with an average concentration of 306 µg/L, reaching seasonally maximum values of 877 µg/L at the WTP and 2,100 µg/L in household taps. The discharge of alum sludge back to the river system is the predominant pathway in the aluminum cycling in the study area, followed by sedimentation and enhanced availability to the biota.

Preparation and characterization and application of activated alumina (AA) from alum sludge for the adsorption of fluoride from aqueous solutions: new approach to alum sludge recycling

2018 ◽  
Vol 18 (5) ◽  
pp. 1825-1831 ◽  
Author(s):  
Ali Ahmad Aghapour ◽  
Hassan Khorsandi ◽  
Anahita Dehghani ◽  
Sima Karimzade
Keyword(s):  
Water Treatment ◽  
Optimum Condition ◽  
Aqueous Solutions ◽  
Maximum Efficiency ◽  
Activated Alumina ◽  
New Approach ◽  
Fluoride Adsorption ◽  
Sludge Recycling ◽  
Alum Sludge ◽  
Condition C

Abstract Activated alumina (AA) prepared from alum sludge (AS) was used in removal of fluoride from aqueous solutions. The capacity of AA in the adsorption of fluoride from water was found to be 17.75 mg/g. The maximum efficiency of fluoride adsorption was 96% at the optimum condition (C = 5 mg/L, pH = 7, t = 20 min and adsorbent dosage = 5 g/L). Based on the results, it can be concluded that conversion of AS to AA can be a method for recycling of AS. Also AA can be used for adsorption of fluoride from aqueous solutions. So AS as a substance harmful to the environment turns into AA as a usable material in water treatment.

scholarly journals Development of Rotary Magnetoferrite Treatment with Stirrers for Waste Water Treatment Plants to Reduce Excess Sludge

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Mahmudul Kabir ◽  
Masafumi Suzuki ◽  
Noboru Yoshimura
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Permanent Magnets ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Excess Sludge ◽  
New Approach ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
The Relationship

A large amount of excess sludge is being produced in the waste water treatment plants (WWTPs), which is a serious problem in terms of economical and environmental problems. So, the experiments on reduction of excess sludge are carried out. We have introduced a new approach for reduction of excess sludge by using ferrite particles and permanent magnets. A rotary treatment plant was introduced which showed good possibilities of this method for application in the WWTPs. Stirrers hold a very important role in rotary magnetoferrite treatment as they directly get in touch with ferrite particles and sludge. In this paper, we have shown the relationship between the ferrite particles and stirrers. Again, the treatment was carried out for different amounts of activated sludge which shows that the smaller the amount, the better the treatment of sludge. This knowledge may pave the way for the reduction of excess sludge in WWTPs in practical fields.

Production process of zeolite X using alum sludge issued from drinking water treatment plants

2012 ◽  
Vol 1380 ◽  
Author(s):  
F. Espejel-Ayala ◽  
R. M. Ramírez Z.
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Production Process ◽  
Raw Materials ◽  
Drinking Water Treatment ◽  
Fecal Coliforms ◽  
Spherical Particles ◽  
Zeolite X ◽  
Water Treatment Plants ◽  
Alum Sludge

ABSTRACTThe present work describes a patent applied for registration at the IMPI (Instituto Mexicano de la Propiedad Industrial) of a production process of zeolite X using as raw materials alum sludges issued from drinking water treatment plants. Sludge sample was collected in a water drinking plant located northern Mexico City. The sample was dried and then physicochemical and microbiological analyses were carried out (metal content, main oxides content, mineralogical analysis, helminth eggs content, fecal coliforms). In accordance with its characterization, two main steps of the zeolites production process were performed: 1) alkaline fusion of alum sludge-NaOH mixture for increasing the dissolved precursor’s content and 2) alkaline hydrothermal treatment. Spherical particles of zeolite X were identified by SEM and XRD respectively. The best synthesized zeolite showed a CEC=2.11 meq/g, value being similar to the data reported for clinoptilolite (the most commonly zeolite used for water treatment in the removal of heavy metals). Thus, the synthesized zeolite X in this work can be used for the same purpose.

scholarly journals Reuse of alum sludge for reducing flocculant addition in water treatment plants

2019 ◽  
Vol 45 (1) ◽  
Author(s):  
PAULO S. SCALIZE ◽  
LEONORA M. D. SOUZA ◽  
ANTONIO ALBUQUERQUE
Keyword(s):  
Water Treatment ◽  
Water Treatment Plants ◽  
Alum Sludge

Determination of natural radionuclides in waste generated in the potable water treatment plants of the Zona da Mata of the state of Pernambuco- Brazil

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Adriana Muniz De Almeida Albuquerque
Keyword(s):  
Water Treatment ◽  
Potable Water ◽  
Natural Radionuclides ◽  
The United States ◽  
Radioactive Material ◽  
Human Consumption ◽  
Radiological Protection ◽  
Natural Occurrence ◽  
Water Treatment Plants ◽  
Potable Water Treatment

The water purification procedure aims to obtain a product appropriate for human consumption, minimizing the presence of contaminants and toxic substances present in the water. Among these contaminants, some radionuclides of natural origin, such as uranium, thorium and their descendants, have been identified. Studies have shown that the stages of purification are quite effective in removing the radionuclides contained in water. The removal is due to co-precipitation of the radionuclides with the suspended materials and the precipitated material is accumulated and characterized as a Technologically Concentrated Natural Occurrence Radioactive Material (TENORM) by the United States Environmental Protection Agency (USEPA). This residue can present significant levels of radioactivity and, when discarded in the environment without any treatment, can generate a problem of environmental impact and a risk to the health of the population. In this way, some gamma emitters of the series of U, Th and the K-40 were determined in the residues generated at the Potable Water Treatment Plants – PWTPs in six municipalities of Pernambuco. The results obtain corroborate the classification of the residues generated in the PWTPs as concentrators of the radioactive components contained in the water supplied to the system and reinforce the need for the release to the environment, which is the usual way of disposal of this waste, to be carried out only after considering the radiological protection standards established.

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