Characterization of Raw and Thermally Treated Alum Sludge

2016 ◽  
Vol 701 ◽  
pp. 138-142 ◽  
Author(s):  
Mohamat Yusuff Soleha ◽  
Keat Khim Ong ◽  
Wan Yunus Wan Md Zin ◽  
Ahmad Mansor ◽  
Fitrianto Anwar ◽  
...  
Keyword(s):  
Water Treatment ◽  
Heating Temperature ◽  
Low Cost ◽  
Waste Product ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Alum Sludge ◽  
Thermally Treated

Use of alum as a coagulant in drinking water treatment process generates an alum sludge as a waste product. Since the amount of this sludge is huge, it is crucial for a water work management to properly handle and dispose of this sludge. Reuse of this alum sludge as a solid adsorbent is one of the proposed applications for this material but modification and characterization are needed to alter and identify its properties so that optimum benefits are obtained. This paper reports characterization of raw and thermally treated alum sludge. The raw alum sludge was collected from a local water treatment plant and heated at 300 °C and 800 °C for 7 hours using a furnace before characterization using scanning electron microscopy energy (SEM), thermogravimetric (TGA), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The results showed that surface morphology, thermal properties, microstructure, surface area and porosity of the sludge were affected by heating temperature whereby increase the heating temperature resulted in improved thermal stability of the sludge. The results also revealed that both raw and thermally treated alum sludge were mesoporous materials and mainly compose of quartz and kaolinite. It can be said that the sludge could be a good candidate as low cost adsorbent.

Analysis of Plant and Soil from Alum Sludge Farm of Drinking Water Treatment Plant

2012 ◽  
Vol 6 (5) ◽  
pp. 184-197
Author(s):  
Ooi Chong Hoe ◽  
Siti Rozaimah Sheikh Abdullah ◽  
Noorhisham Tan Kofli ◽  
Mushrifah Idris
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Drinking Water Treatment Plant ◽  
Alum Sludge

scholarly journals Study on the preparation of granular alum sludge adsorbent for phosphorus removal

2019 ◽  
Vol 79 (12) ◽  
pp. 2378-2386 ◽  
Author(s):  
H. F. Wu ◽  
J. P. Wang ◽  
E. G. Duan ◽  
Y. F. Feng ◽  
Z. Y. Wan ◽  
...  
Keyword(s):  
Removal Rate ◽  
Low Cost ◽  
Average Pore Size ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Raw Material ◽  
Phosphorus Concentration ◽  
Average Pore ◽  
Alum Sludge

Abstract Alum sludge is the sludge discharged from a sedimentation tank in a drinking water treatment plant when polymerized with poly-aluminum chloride (PAC). In this paper, granular alum sludge adsorbent (GASA) was manufactured using powdery alum sludge (PAS) as the raw material and methods such as gluing and pore-forming. The effects of different binders, pore-forming agents, roasting temperatures, and roasting times on the formation of GASA and its dephosphorization performance were investigated. Results showed that the optimum binder was AlCl3 at a mass ratio of 8%, and the best pore-forming agent was starch at a 4% dosage ratio. Meanwhile, the optimum roasting temperature and time were 500 °C and 2 hours, respectively. The specific surface area of GASA was 23.124 m2/g. Scanning electron microscopy suggested that GASA's surface became rough, particles became tight, and average pore size increased, with additional pore channels. P adsorption by GASA reached 0.90 mg/g. The effluent phosphorus concentration of actual tail water decreased to 0.49 mg/L and the removal rate reached 73.5% when the GASA dosage was 20 g/L. The findings of this study are important for the further development of a low-cost adsorbent material for P removal in the future.

scholarly journals Characterization of Alum Sludge from Surabaya Water Treatment Plant, Indonesia

2019 ◽  
Vol 20 (5) ◽  
pp. 7-13 ◽  
Author(s):  
Rizkiy Barakwan ◽  
Yulinah Trihadiningrum ◽  
Arseto Bagastyo
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Alum Sludge

scholarly journals PHOSPHATE REMOVAL FROM AQUEOUS SOLUTION BY USING MODIFIED SLUDGE FROM WATER TREATMENT PLANT

2018 ◽  
Vol 56 (2C) ◽  
pp. 43-49
Author(s):  
Dang Thi Thanh Loc
Keyword(s):  
Aqueous Solution ◽  
Water Treatment ◽  
Low Cost ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Phosphate Removal ◽  
Maximum Adsorption Capacity ◽  
P Concentration ◽  
P Removal

Heat and humic acid modified sludge (MS) from drinking water treatment plant (DWTP) is used as an adsorbent for removal of phosphate (P) from aqueous solution. The MS was characterized by XRD and SEM observation. The effects of pH, adsorbent dosage, initial P concentration, and exposure time on the P removal were studied. Under identical treatment conditions (MS dosage = 10 g/L, initial P concentration = 10 mg/L, pH 7, 120 rpm, and room temperature), a removal efficiency of 91  % was obtained within 240 min. The Freundlich and Langmuir adsorption models were used for the mathematical description of adsorption equilibrium and it was found that P removal was best described by Langmuir model. The maximum adsorption capacity of the adsorbent based on sludge of Quang Te DWTP was 0.90 mg/g. The adsorption process followed pseudo-second-order kinetics (R2 ≥ 0.98). These findings suggest that MS has potential applications as a low-cost adsorbent for P treatment.

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