scholarly journals Ultrasounds Energy as an Agent of Polyelectrolyte Modification Prior to Sewage Sludge Conditioning

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6165
Author(s):  
Lidia Wolny ◽  
Paweł Wolski
Keyword(s):  
Sewage Sludge ◽  
Chemical Compounds ◽  
Ultrasonic Field ◽  
Field Exposure ◽  
Field Frequency ◽  
Geometrical Characteristics ◽  
Sludge Conditioning ◽  
Quantitative Changes ◽  
Ultrasonic Modification ◽  
Shape And Size

The presented research concerned the phenomenon of polyelectrolyte changes resulting from modification by applying the ultrasonic field. The main aim of this research was to determine the activation degree of this macromolecular chemical compound and its effect on sewage sludge subjected to conditioning and followed by dewatering. The overall goal was to investigate the potential way of reducing the dosage of chemical compounds prior to sewage sludge conditioning. The polyelectrolyte samples were sonicated with the ultrasonic disintegrator UD-20 coupled with a sandwich concentrator. The power output of the generator was 180 W and the ultrasonic field frequency was 22 kHz. To describe the geometrical characteristics of the separated phases, the following parameters were determined: surface area (AA), perimeter (LA) and non-dimensional coefficient. With reference to the obtained results, the most significant quantitative changes in shape and size of the separated phases were observed for the ultrasonic field exposure time in the range of 0 to 10 s. This was in agreement with the results observed during dewatering of the investigated sewage sludge. In view of the quantitative analysis of the structure of the polyelectrolyte subjected to the ultrasonic modification, dewatering of sewage sludge was considerably improved by the application of the presented method.

Changes of some sewage sludge parameters prepared with an ultrasonic field

1997 ◽  
Vol 36 (11) ◽  
pp. 101-106 ◽  
Author(s):  
January Bien ◽  
Lidia Wolny
Keyword(s):  
Sewage Sludge ◽  
Microscopic Analysis ◽  
Chemical Compounds ◽  
Ultrasonic Field ◽  
Water Removal ◽  
Vacuum Filter ◽  
Additional Criterion ◽  
New Methods ◽  
Sludge Conditioning

Studies of sewage sludge conditioning by ultrasonic field concentrate on determination of the increase of water removal effect, which depends on kind of sludge and chemical compounds used in the dewatering process. An attempt was made to find new methods of sludge preparation before dewatering. Tests presented here focused on digested and difficult dewatered sludge. The sludge was dewatered on a vacuum filter after conditioning with polyelectrolytes and the ultrasonic field. The microscopic analysis was an additional criterion to evaluate changes in the sludge structure after preparation. The polyelectrolyte dose of 3 mg/g d.m. sonicated within 15 sec. resulted in the 50% decrease of sludge volume. Results presented confirmed our previous experiences, concerning the relation between conglomerates of sludge and the effect of dewatering.

scholarly journals Influence of Digested Sludge Conditioning on the Dewatering Processes and the Quality of Sludge Liquid

2020 ◽  
Vol 27 (1) ◽  
pp. 151-164 ◽  
Author(s):  
Beata Bień ◽  
Jurand D. Bień
Keyword(s):  
Sewage Sludge ◽  
Oxygen Demand ◽  
Ultrasonic Field ◽  
Ammonium Nitrogen ◽  
Digested Sludge ◽  
Capillary Suction ◽  
Combined Action ◽  
Sludge Conditioning ◽  
Combination Of Methods

AbstractTo increase the dewatering effect, sewage sludge should be properly prepared before dewatering. Sludge conditioning is a process whereby sludge solids are treated with chemicals or various other means to improve dewatering characteristics of the sludge by reducing the specific resistance and compressibility of the sludge. The aim of the research was to determine the possibility of increasing the efficiency of sewage sludge dewatering by applying chemical agents and ultrasonic field. Some parameters, such as suspension, chemical oxygen demand (COD), phosphorus and ammonium nitrogen content in sludge supernatant, were also analysed. Digested sludge belonged to the group of hardly dewatered sludge, its capillary suction time (CST) was of high value (2639 s). The lowest CST value (88.5 s) was obtained for the unsonicated sludge prepared only with PIX 113 at a dose of 7.0 mg/g d.m. Both the dose and the type of chemicals used, as well as the time of sonication, had an impact on the changes occurring in sludge properties. The increase in mechanical dewatering efficiency was obtained by using a combination of methods applied for sludge preparation, where the sonication of sludge was used at the preliminary stage and followed by dosing chemical substances. This resulted in the reduction of sludge final hydration and changes of other parameters. In addition, combined action of PIX 113 and Zetag 8180 allowed to reduce the content of suspended solids and COD in sludge supernatant.

Mechanism of red mud combined with Fenton's reagent in sewage sludge conditioning

2014 ◽  
Vol 59 ◽  
pp. 239-247 ◽  
Author(s):  
Hao Zhang ◽  
Jiakuan Yang ◽  
Wenbo Yu ◽  
Sen Luo ◽  
Li Peng ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Red Mud ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Sludge Conditioning

scholarly journals Sewage sludge conditioning and disinfection by gamma irradiation.

1969 ◽  
Vol 59 (11) ◽  
pp. 2067-2076 ◽  
Author(s):  
J E Etzel ◽  
G S Born ◽  
J Stein ◽  
T J Helbing ◽  
G Baney
Keyword(s):  
Sewage Sludge ◽  
Gamma Irradiation ◽  
Sludge Conditioning

Dewatering of sewage sludge treated by the combination of ultrasonic field and chemical methods

2020 ◽  
Vol 199 ◽  
pp. 72-78
Author(s):  
Beata Bień ◽  
Jurand D. Bień
Keyword(s):  
Sewage Sludge ◽  
Ultrasonic Field ◽  
Chemical Methods

Sewage sludge conditioning with sulphur oxidizing bacteria

1960 ◽  
Vol 2 (4) ◽  
pp. 401-410 ◽  
Author(s):  
Wendye E. Johnston ◽  
K. J. Ives
Keyword(s):  
Sewage Sludge ◽  
Sludge Conditioning

scholarly journals Application of an Innovative Ultrasound Disintegrator for Sewage Sludge Conditioning Before Methane Fermentation

2018 ◽  
Vol 19 (5) ◽  
pp. 240-247 ◽  
Author(s):  
Marcin Zieliński ◽  
Marcin Dębowski ◽  
Mirosław Krzemieniewski ◽  
Paulina Rusanowska ◽  
Magdalena Zielińska ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Methane Fermentation ◽  
Sludge Conditioning

scholarly journals Generation, characteristics and disposal of sew age sludge produced on treatment plant of Tatarstan

2019 ◽  
pp. 537-543
Author(s):  
Svetlana Yu. Selivanovskaya ◽  
Venera Z. Latypova
Keyword(s):  
Sewage Sludge ◽  
Industrial Wastewater ◽  
Metal Content ◽  
Treatment Plant ◽  
Chemical Compounds ◽  
Organic Content ◽  
Environmental Damage ◽  
Toxicity Bioassay ◽  
Metal Composition

Treatment of wastewater unavoidably results in the generation of huge quantities of sludge in which pollutants concentrate and which must be disposed of. The aim of this study was to compare the quality of organic matter, the metal composition and toxic organic content in different sewage sludge. The presence of these substances caused environmental damage in soil, plants, groundwater and air. Sewage sludge was periodically sampled from five treatment plant treated municipal and industrial wastewater in common in Almetevsk, Elabuga, Zainsk, Kazan, Chistopol (Tatarstan, Russia). Knowledge of the metal content of the sludge is a key step in selecting or in ruling out the various disposal alternatives. For the approval of possible utilization of sewage sludge as fertilizer the estimation of the chemical compounds has to be supplemented with the toxicity bioassay.

scholarly journals Experimental Research of Sewage Sludge Conditioning with The Use of Selected Biomass Ashes

2019 ◽  
Vol 214 ◽  
pp. 012020 ◽  
Author(s):  
M Wójcik ◽  
F Stachowicz ◽  
A Masłoń
Keyword(s):  
Sewage Sludge ◽  
Experimental Research ◽  
Sludge Conditioning ◽  
Biomass Ashes
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