Effects of alkalinity on interaction between EPS and hydroxy-aluminum with different speciation in wastewater sludge conditioning with aluminum based inorganic polymer flocculant

2021 ◽  
Vol 100 ◽  
pp. 257-268 ◽  
Author(s):  
Weijun Zhang ◽  
Mingyue Tang ◽  
Dandan Li ◽  
Peng Yang ◽  
Shiwei Xu ◽  
...  
Keyword(s):  
Wastewater Sludge ◽  
Inorganic Polymer ◽  
Sludge Conditioning ◽  
Polymer Flocculant

scholarly journals Investigating the effects of different cationic charge flocculation polymers on municipal wastewater sludge dewatering

2021 ◽  
Author(s):  
Megan Abrahams ◽  
Mujahid Aziz ◽  
Godwill Kasongo
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Operating Cost ◽  
Wastewater Sludge ◽  
Municipal Wastewater Treatment ◽  
Bench Scale ◽  
Treated Effluent ◽  
Solids Concentration ◽  
Municipal Wastewater Treatment Plants ◽  
Polymer Flocculant

Abstract The minimization of sludge produced by municipal wastewater treatment plants (MWWTPs) is critical as its handling accounts for approximately 50% of the total operating cost. The challenges in predicting dewatering performance can be overcome by optimizing the sludge treatment process, especially conditioning and dewatering. This study aimed to investigate sludge dewaterability at four different MWWTPs, using a gravity drainage test unit and a bench-scale press. The effect of differently treated effluent used as a solvent to mix the flocculation polymers was observed during dewatering. The membrane bioreactor (MBR) treated effluent yielded the highest filtrate volume in the lowest amount of time, with the least polymer flocculant dosage. The Box Behnken Design model fitted the data and proved a relationship between polymer dosage, cake solids concentration, and cake height during the bench-scale press tests.

Production of Polyaluminum Ferric Chloride from Blast Furnace Dust

2014 ◽  
Vol 1030-1032 ◽  
pp. 151-154
Author(s):  
Yan Li Zhang ◽  
Shan Ping Li ◽  
Qing Tao Zhang ◽  
Ze He He ◽  
Xiao Ming Li
Keyword(s):  
Blast Furnace ◽  
Hydrochloric Acid ◽  
Dissolution Rate ◽  
Ferric Chloride ◽  
Extraction Efficiency ◽  
Inorganic Polymer ◽  
Reaction Conditions ◽  
Blast Furnace Dust ◽  
Optimum Reaction ◽  
Polymer Flocculant

Our goal was to produce a complex inorganic polymer flocculant containing poly aluminum ferric chloride (PAFC) from blast furnace dust. The optimum reaction conditions to achieve high extraction efficiency of iron and aluminum were obtained through a series of batch experiments. PAFC was synthesized by controlling the hydrolysis conditions of iron and aluminum. Extraction efficiency of iron and aluminum oxides from blast furnace dust was affected greatly by reaction parameters such as temperature, time and hydrochloric acid consumption. The dissolution rate of iron was 67.61% and the dissolution rate of aluminum was 12.35% under the optimum reaction conditions (100 °C, 3 hours, and and the mixing ratio of the blast furnace dust to the hydrochloric acid is 1:3). To neutralize the pH and then synthesize PAFC, a solution of Al (OH)3 was added to the dissolved blast furnace dust, and the mixture was hydrolyzed at 60~70 °C for 4 hours. The prepared complex inorganic polymer flocculant proved to be effective in removing turbidity. The turbidity removal ratio for kaolin simulative water was 99.36%.

scholarly journals Speciation stability of inorganic polymer flocculant–PACl

2004 ◽  
Vol 243 (1-3) ◽  
pp. 1-10 ◽  
Author(s):  
Dongsheng Wang ◽  
Wei Sun ◽  
Yi Xu ◽  
Hongxiao Tang ◽  
John Gregory
Keyword(s):  
Inorganic Polymer ◽  
Polymer Flocculant

Wastewater sludge conditioning by fly ash

1998 ◽  
Vol 17 (7) ◽  
pp. 443-450 ◽  
Author(s):  
Sike Wang ◽  
T. Viraraghavan
Keyword(s):  
Fly Ash ◽  
Wastewater Sludge ◽  
Sludge Conditioning
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