scholarly journals MONITORING OF WASTEWATER PURIFICATION PROCESS

2017 ◽  
pp. 9-11
Author(s):  
Yulia Shatohina
Keyword(s):  
Purification Process ◽  
Wastewater Purification

scholarly journals Application of dielectric constant measurement in microwave sludge disintegration and wastewater purification processes

2018 ◽  
Vol 77 (9) ◽  
pp. 2284-2291 ◽  
Author(s):  
Petra Veszelovszki Kovács ◽  
Balázs Lemmer ◽  
Gábor Keszthelyi-Szabó ◽  
Cecilia Hodúr ◽  
Sándor Beszédes
Keyword(s):  
Dielectric Constant ◽  
Organic Matter ◽  
Process Parameters ◽  
Municipal Wastewater ◽  
Power Level ◽  
Wastewater Sludge ◽  
Purification Process ◽  
Dielectric Measurements ◽  
Wastewater Purification

Abstract It has been numerously verified that microwave radiation could be advantageous as a pre-treatment for enhanced disintegration of sludge. Very few data related to the dielectric parameters of wastewater of different origins are available; therefore, the objective of our work was to measure the dielectric constant of municipal and meat industrial wastewater during a continuous flow operating microwave process. Determination of the dielectric constant and its change during wastewater and sludge processing make it possible to decide on the applicability of dielectric measurements for detecting the organic matter removal efficiency of wastewater purification process or disintegration degree of sludge. With the measurement of dielectric constant as a function of temperature, total solids (TS) content and microwave specific process parameters regression models were developed. Our results verified that in the case of municipal wastewater sludge, the TS content has a significant effect on the dielectric constant and disintegration degree (DD), as does the temperature. The dielectric constant has a decreasing tendency with increasing temperature for wastewater sludge of low TS content, but an adverse effect was found for samples with high TS and organic matter contents. DD of meat processing wastewater sludge was influenced significantly by the volumetric flow rate and power level, as process parameters of continuously flow microwave pre-treatments. It can be concluded that the disintegration process of food industry sludge can be detected by dielectric constant measurements. From technical purposes the applicability of dielectric measurements was tested in the purification process of municipal wastewater, as well. Determination of dielectric behaviour was a sensitive method to detect the purification degree of municipal wastewater.

CdS nanoparticles decorated triazine-based COFs with enhanced photocatalytic activity for highly effective degradation of emerging contaminants

2021 ◽  
Author(s):  
Yanqing Cong ◽  
Xiang Chen ◽  
Wanxing Wang ◽  
Shi-Wen Lv
Keyword(s):  
Photocatalytic Activity ◽  
Free Radicals ◽  
Optical Property ◽  
Emerging Contaminants ◽  
Cds Nanoparticles ◽  
Purification Process ◽  
Wastewater Purification ◽  
Cds Nanoparticle ◽  
Highly Effective

Photocatalytic technique is an attractive strategy to activate persulfate for generating free radicals in the wastewater purification process. Herein, the CdS nanoparticle with unique optical property was employed to decorate...

scholarly journals INFLUENCE OF BIO-PREPARATION ON WASTEWATER PURIFICATION PROCESS IN CONSTRUCTED WETLANDS

2015 ◽  
Vol 16 ◽  
pp. 159-163 ◽  
Author(s):  
Monika Puchlik ◽  
Katarzyna Ignatowicz ◽  
Wojciech Dąbrowski
Keyword(s):  
Constructed Wetlands ◽  
Purification Process ◽  
Wastewater Purification

Analysis of galanthamine and related alkaloids in plant extracts and during the purification process by GC-MS

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
S Berkov ◽  
C Codina ◽  
F Viladomat ◽  
J Bastida
Keyword(s):  
Plant Extracts ◽  
Purification Process

PENGARUH PELARUT KLOROFORM DALAM PEMURNIAN GLISEROL DENGAN PROSES ASIDIFIKASI ASAM KLORIDA

2016 ◽  
Vol 5 (3) ◽  
pp. 38-43
Author(s):  
Windi Monica Surbakti ◽  
Gerson Rico M.H ◽  
Mersi Suriani Sinaga
Keyword(s):  
Fatty Acid ◽  
Volume Ratio ◽  
Biodiesel Production ◽  
Extraction Time ◽  
Glycerol Concentration ◽  
Purification Process ◽  
Soap Content ◽  
Test Volume ◽  
Base Content ◽  
Water Salt

Glycerol as a byproduct of biodiesel production was approximately formed 10% of the biodiesel weight. Impurities which contained in the glycerol such as catalyst, soap, methanol, water, salt, and matter organic non glycerol (MONG) have a significant effect on the glycerol concentration. So, it is necessary to treat the impurities. The purpose of this study is to know the effect of chloroform to glycerol purification process with acidification method using hydrochloric acid as pretreatment process. This research was begun with acid addition to the glycerol to neutralize the base content and to split the soap content into free fatty acid and salt, that are more easily separated from glycerol. Then the process was continued with extraction by the solvent chloroform using the variable of test volume ratio (v/v) (1:1, 1:1.5, 1:2)  and the extraction time (20, 40, and 60 minutes). The results showed that the more volume of solvent used, gave less extraction time to produce high purity of glycerol. The highest purity produced in this study amounted to 90,9082% is obtained at the ratio of the volume solvent (v/v) 1:1 with extraction time 60 minutes.

PEG1000 as a Low Melting and Ecofriendly Solvent for Air Oxidative and Catalyst Free 2,4-Disubstitute Quinazoline Synthesis

2020 ◽  
Vol 17 (9) ◽  
pp. 709-716
Author(s):  
Ebrahim Saeedian Moghadam ◽  
Shahrzad Ghafary ◽  
Mohsen Amini
Keyword(s):  
Melting Point ◽  
High Yield ◽  
Purification Process ◽  
Poly Ethylene Glycol ◽  
Free Condition ◽  
Catalyst Free ◽  
Privileged Scaffold ◽  
Quinazoline Derivatives ◽  
Poly Ethylene ◽  
Work Up

With regard to the importance of quinazoline as a privileged scaffold, herein we report the synthesis of twenty seven 2,4-disubstitute quinazoline derivatives in a new catalyst free condition. In the current work, poly ethylene glycol (PEG1000) as an inexpensive, very simple commercially available, ecofriendly and low melting point solvent was used. Air bubbling, a green oxidant, for oxidation purpose was also used. This is the first report about using PEG1000 as a solvent simultaneously with air bubbling as oxidant in quinazoline synthesis. All of the compounds 1-27 were synthesized in high yield with very simple work up and purification process without using column chromatography. All the structures were confirmed using 1H NMR, 13C NMR, IR, MS and elemental analysis.

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