scholarly journals Physical characteristics of materials of Ecuadorian origin for water treatment

2021 ◽  
Vol 958 (1) ◽  
pp. 012020
Author(s):  
M Mayacela ◽  
L Maldonado ◽  
F Morales ◽  
B Suquillo
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Chemical Treatment ◽  
Laboratory Tests ◽  
Physical Characteristics ◽  
International Standards ◽  
Contaminated Water ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Wastewater Pollutants

Abstract In Ecuador, contaminated water is discharged directly into the sewage system. The treatments carried out for the elimination of wastewater pollutants are classified into three types: Physical, Chemical and Biological. One of the treatments that is frequently used is the physico-chemical treatment in which various reactive substances are used, which is why in this research several reactive substances of Ecuadorian origin, including activated carbon, peat, limestone, volcanic pyroclasts, zeolite clinoptilolite and zeolite modernite, are physically characterized. For this purpose, some laboratory tests were carried out based on national and international standards in order to obtain the granulometry, compactness coefficient, porosity, sphericity and permea-bility.

Wastewater Treatment With Activated Carbon

1972 ◽  
Vol 7 (1) ◽  
pp. 1-12
Author(s):  
A. Benedek
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Chemical Treatment ◽  
Technological Development ◽  
Municipal Waste ◽  
Research Needs ◽  
Physico Chemical ◽  
Recent Developments

Abstract Recent developments in the application of activated carbon to wastewater treatment are reviewed. Particular emphasis is placed on the physico-chemical treatment of municipal waste. Technological development, adsorptive behaviour, and research needs serve as the three primary discussion topics.

Activated carbon impregnation with ag and cu composed nanoparticles for escherichia coli contaminated water treatment

2019 ◽  
Vol 97 (9) ◽  
pp. 2408-2418 ◽  
Author(s):  
Flávia Sayuri Arakawa ◽  
Quelen Letícia Shimabuku‐Biadola ◽  
Simone de Lima Bazana ◽  
Marcela Fernandes Silva ◽  
Benício Alves de Abreu Filho ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Activated Carbon ◽  
Water Treatment ◽  
Contaminated Water

scholarly journals Various Impregnation Methods Used for the Surface Modification of the Adsorbent: A Review

2018 ◽  
Vol 7 (4.7) ◽  
pp. 330 ◽  
Author(s):  
C. R. Girish ◽  
. .
Keyword(s):  
Surface Modification ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Properties ◽  
Chemical Treatment ◽  
Water Contamination ◽  
Recent Time ◽  
Operating Conditions ◽  
Physical Chemical

The water contamination is an important crisis which is to be addressed in the recent time. The pollutants present in wastewater are treated by adsorption using activated carbon, which is considered as one of the effective method. The adsorbent has to be modified to improve the adsorption capacity and the surface properties. Various methods such as physical, chemical treatment, impregnation and functionalization techniques are available. Impregnation is one of the effective method carried out for surface modification and to increase the adsorption capacity. Therefore, current study investigates the different impregnation methods used for the surface modification of the adsorbent. It also reviews the various precursors used for adsorbent preparation, the impregnating agent, the operating conditions and the adsorption capacity of the adsorbent.  

scholarly journals Physico-chemical treatment for the degradation of cyanotoxins with emphasis on drinking water treatment—How far have we come?

2018 ◽  
Vol 6 (4) ◽  
pp. 5369-5388 ◽  
Author(s):  
Pratik Kumar ◽  
Krishnamoorthy Hegde ◽  
Satinder Kaur Brar ◽  
Maximiliano Cledon ◽  
Azadeh Kermanshahi pour
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Chemical Treatment ◽  
Drinking Water Treatment ◽  
Physico Chemical

PHYSICAL-CHEMICAL TREATMENT OF WASTE EFFLUENTS FROM CANNING OF LEAFY GREEN VEGETABLES

1974 ◽  
Vol 37 (4) ◽  
pp. 205-208 ◽  
Author(s):  
Wayne A. Bough
Keyword(s):  
Activated Carbon ◽  
Chemical Treatment ◽  
Suspended Solids ◽  
Pilot Scale ◽  
Cationic Polymer ◽  
Anionic Polymer ◽  
Physical Chemical ◽  
Solids Concentration ◽  
Waste Effluents ◽  
Turnip Greens

Suspended soilds in waste effluents from the canning of leafy green vegetables were effectively reduced by segregation and separate physical-chemical treatment of the unit wastes. Turbidity in the dunker washer effluent from spinach was reduced by treatment with 0.04 mg of an anionic polymer per liter at pH 4.0. The most concentrated effluent (from the tumbler fillers) contained 11% of the total suspended solids load and 16% of the COD in only 1.3% of the waste water flow. Treatment with 20 mg cationic polymer per liter, 80 mg ferric sulfate per liter, and 2 mg anionic polymer per liter reduced the suspended solids concentration from 1,348 mg/l to 63 mg/l—a reduction of 95%. The tumbler filler effluent from turnip greens and diced roots was treated on a pilot-scale with 70 mg cationic polymer per liter, 80 mg calcium chloride per liter and 10 mg anionic polymer per liter to reduce the suspended solids from 1,148 to 140 mg/l The composite effluent from canning of turnip greens and diced roots was treated with polymeric flocculating agents and activated carbon in a physical-chemical treatment system. The suspended solids concentration was reduced by 92% and the COD by 19% through flocculation and settling. The clarified effluent was applied to a downpass column of activated carbon which adsorbed 89% of the COD applied.

Combined physico-chemical treatment of secondary settled municipal wastewater in a multifunctional reactor

2013 ◽  
Vol 68 (8) ◽  
pp. 1715-1722 ◽  
Author(s):  
O. Santoro ◽  
T. Pastore ◽  
D. Santoro ◽  
F. Crapulli ◽  
M. Raisee ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sodium Hypochlorite ◽  
Chemical Treatment ◽  
Municipal Wastewater ◽  
Dose Range ◽  
Total Phenols ◽  
Total Coliforms ◽  
Physico Chemical ◽  
Powder Activated Carbon ◽  
Multifunctional Reactor

In this paper, the physico-chemical treatment of municipal wastewater for the simultaneous removal of pollutant indicators (chemical oxygen demand (COD) and total coliforms) and organic contaminants (total phenols) was investigated and assessed. A secondary settled effluent was subjected to coagulation, disinfection and absorption in a multifunctional reactor by dosing, simultaneously, aluminum polychloride (dose range: 0–150 μL/L), natural zeolites (dose range: 0–150 mg/L), sodium hypochlorite (dose range: 0–7.5 mg/L) and powder activated carbon (dose range: 0–30 mg/L). The treatment process was optimized using computational fluid dynamics (CFD) and response surface methodology. Specifically, a Latin square technique was employed to generate 16 combinations of treating agent types and concentrations which were pilot tested on an 8 m3/h multifunctional reactor fed by a secondary effluent with COD and total coliform concentrations ranging from ≈20 to 120 mg/L and from 105 to 106 CFU/100 mL, respectively. Results were promising, indicating that removal yields up to 71% in COD and 5.4 log in total coliforms were obtained using an optimal combination of aluminum polychloride (dose range ≈ 84–106 μL/L), powder activated carbon ≈ 5 mg/L, natural zeolite (dose range ≈ 34–70 mg/L) and sodium hypochlorite (dose range ≈ 3.4–5.6 mg/L), with all treating agents playing a statistically significant role in determining the overall treatment performance. Remarkably, the combined process was also able to remove ≈ 50% of total phenols, a micropollutant known to be recalcitrant to conventional wastewater treatments.

Combination of UV Oxidation with Other Treatment Technologies for the Remediation of Contaminated Water

1997 ◽  
Vol 2 (3) ◽  
Author(s):  
K. G. Bircher ◽  
W. Lem ◽  
K. M. Simms ◽  
B. W. Dussert
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Cost Effective ◽  
Integrated Systems ◽  
Contaminated Water ◽  
Air Stripping ◽  
Treatment Train ◽  
Treatment Technologies ◽  
Using Data ◽  
Uv Oxidation

AbstractThe use of stand-alone water treatment technologies such as UV/Oxidation, granular activated carbon (GAC), air stripping and sedimentation, has proven to be cost-effective in many cases. However, there are a substantial number of instances where a combination of treatment technologies integrated into a treatment train provides a more economical approach than would be obtained by using only one technology. This paper presents case studies of integrated systems where UV/Oxidation is combined with either GAC, air stripping, or precipitation. The benefits, including improved treatment costs, are described using data from actual installations.

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