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.

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.

Experiences with the practical implementation and operation of biological nitrification for a small-scale drinking water treatment plant

2016 ◽  
Vol 16 (4) ◽  
pp. 922-930 ◽  
Author(s):  
L. Richard ◽  
E. Mayr ◽  
M. Zunabovic ◽  
R. Allabashi ◽  
R. Perfler
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Drinking Water Supply ◽  
Small Scale ◽  
Treatment Performance ◽  
Biological Nitrification

The implementation and evaluation of biological nitrification as a possible treatment option for the small-scale drinking water supply of a rural Upper Austrian community was investigated. The drinking water supply of this community (average system input volume: 20 m3/d) is based on the use of deep anaerobic groundwater with a high ammonium content of geogenic origin (up to 5 mg/l) which must be treated to prevent the formation of nitrites in the drinking water supply system. This paper describes the implementation and operation of biological nitrification despite several constraints including space availability, location and financial and manpower resources. A pilot drinking water treatment plant, including biological nitrification implemented in sand filters, was designed and constructed for a maximum treatment capacity of 1.2 m3/h. Online monitoring of selected physicochemical parameters has provided continuous treatment performance data. Treatment performance of the plant was evaluated under standard operation as well as in the case of selected malfunction events.

scholarly journals Adsorption of Carbon Dioxide by Reusing Drinking Water Treatment Plant Sludge

2017 ◽  
Vol 29 (12) ◽  
pp. 2665-2670
Author(s):  
Soleha Mohamat Yusuff ◽  
K.K. Ong ◽  
W.M.Z. Wan Yunus ◽  
A. Fitrianto ◽  
M. Ahmad ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Drinking Water Treatment Plant ◽  
Water Treatment Plant Sludge

scholarly journals Bacillus purgationiresistans sp. nov., isolated from a drinking-water treatment plant

2012 ◽  
Vol 62 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Ivone Vaz-Moreira ◽  
Vânia Figueira ◽  
Ana R. Lopes ◽  
Alexandre Lobo-da-Cunha ◽  
Cathrin Spröer ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Gene Sequence ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Rrna Gene ◽  
Rrna Gene Sequence

A Gram-positive, aerobic, non-motile, endospore-forming rod, designated DS22T, was isolated from a drinking-water treatment plant. Cells were catalase- and oxidase-positive. Growth occurred at 15–37 °C, at pH 7–10 and with <8 % (w/v) NaCl (optimum growth: 30 °C, pH 7–8 and 1–3 % NaCl). The major respiratory quinone was menaquinone 7, the G+C content of the genomic DNA was 36.5 mol% and the cell wall contained meso-diaminopimelic acid. On the basis of 16S rRNA gene sequence analysis, strain DS22T was a member of the genus Bacillus. Its closest phylogenetic neighbours were Bacillus horneckiae NRRL B-59162T (98.5 % 16S rRNA gene sequence similarity), Bacillus oceanisediminis H2T (97.9 %), Bacillus infantis SMC 4352-1T (97.4 %), Bacillus firmus IAM 12464T (96.8 %) and Bacillus muralis LMG 20238T (96.8 %). DNA–DNA hybridization, and biochemical and physiological characterization allowed the differentiation of strain DS22T from its closest phylogenetic neighbours. The data supports the proposal of a novel species, Bacillus purgationiresistans sp. nov.; the type strain is DS22T ( = DSM 23494T = NRRL B-59432T = LMG 25783T).

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