特集

学生の研究活動報告−国内学会大会・国際会議参加記 22

Report on 49th Annual
Conference of Japan Society
on Water Environment

concentration for experiment. The raw wastewater consists of 500 mL of the restaurant wastewater and 100
mL of methylene blue (500 mg/L). While textile sludge
was received from a textile industry in Wakayama Pre-アリ・ラーマンfecture. Sludge was come from the activated sludge andAri RAHMAN

coagulation-flocculation system. Textile sludge was car-2014 年度修了

bonized at 600℃ with a Muffle Furnace F 0410

環境ソリューション工学専攻博士課程(Yamato, Japan) for 2 hours without influence of oxy-1. Prefacegen.

I have presented my research by poster presentation
with the title of “Colored wastewater removal by textile sludge-based adsorbent” in Kanazawa University,
Kakuma Campus from March 16th to 18th, 2015.

2.3 Experimental apparatus
Plastic container (1 L) containing 600 mL of raw
wastewater and 400 mL of activated sludge (MLSSaround 2000 mg/L) were firstly aerated for 8 hours fol-

2. Summary of Presentation

lowed by sedimentation for 3 hours. The dye remains

2.1 Introduction

on the solution then was treated by adsorption with car-Textile sludge was converted into potential adsorbent
through carbonization process in order to tackle textile

bonized sludge at 600℃ as adsorbent. The experimental
design is shown on Fig. 1.

sludge and colored wastewater problem. Previous research reported that carbonization at 600℃ was an optimum temperature to create larger specific surface area
(138.9 m2/g) than 400〜800℃. The carbonized sludge
at 600℃ was tested its performance for methylene blue
removal in the pure solution and had 60.3 mg/g of ad-Fig. 1 Experimental design in case of real
wastewater

sorption capacity. The practical test in the real wastewater becomes the next challenge especially to investi-

In adsorption experiment, Erlenmeyer flask (300 mL)

gate the effect of other contaminants for its adsorption

containing 100 mL of solution with different initial ad-performance. The objectives of this research were to in-sorbent dose (0.05〜0.4 g/L) were shaken with a bio-

vestigate the performance ability of carbonized sludge

shaking machine, series TB-9R-3F (Takasaki Scientificfor methylene blue removal and to determine the neces-Instrument Corp., Japan) at 150 rpm at 25℃ for 1280

sary adsorbent dose for complete color removal fromminutes. The absorbance of sample then was measured

real wastewater.

at 665 nm ( "!#) with UV-2550 UV-Visible Spectro-!

photometer (Shimadzu, japan) after centrifugation (2900
2.2 Material for experimentrpm for 15 minutes).

Wastewater was obtained from a restaurant at
Ryukoku University, Japan. Methylene blue powder

2.4 Result and discussion

was received from Nacalai Tesque, Japan. It then was

Table 1 shows the aeration process with activateddiluted with deionized water to get the necessity of dye

sludge was able to remove 76.6% of methylene blue

― S-65 ―from the wastewater. While in adsorption treatment, ac-of adsorbent dose while%-)(!) was higher thancording to the calculation and plotting into methylene$'.!) at 0.1 g/L and more. Due to the adsorbent dose

blue calibration curve the completely methylene blue

at 0.3 g/L was preferable for completely color removal,removal was reached when the adsorbent dose start

this research deduced that there was almost no inhibi-

from 0.2 g/L. However the actual condition showedtion during adsorption of methylene blue into carbon-

that the color slightly remained at 0.2. Thus in order toized sludge at 600℃ in case of real wastewater.

satisfied both calculation and visibility analysis this reTable 1

search deduced that the completely removal was

Color removal performanceachieved by 0.3 g/L of adsorbent dose. Furthermore, inorder to investigate the influence of other contaminants
on adsorbent performance, the observed-residual concentration was compared with the predicted-residualconcentration follow the Langmuir adsorption isotherm.
The predicted-residual concentration can be estimatedby following equation (1) :2.5 Conclusion
This research demonstrated that carbonized textile!$'.!+!$'.!)"& $,&%(""# "$')(!)(1)##"# "$')(!)*!+ is observed-initial concentration (mg/Where : $'.
.!) is the observed-residual concentration (mg/L), $')(!) is the predicted-residual concentration (mg/L), %L), * is the adsorbent mass (g), & is volume of solution (L), ,&%( is maximum monolayer capacity (mg/g)
and "# is Langmuir capacity factor (L/ mg). According

sludge-based adsorbent at 600℃ was able to remove

to the previous research carbonized sludge at 600℃ has

Japan Society on Water Environment in Kanazawa Uni-,&%( of 60.30 mg/g with "# of 0.851 L/g for methylene

methylene blue from the real wastewater with almost
no inhibition by other contaminants. The necessary adsorbent for complete color removal was achieved at 0.3
g/L-wastewater of adsorbent dose.

3. Acknowledgment
I would like to thankful for the opportunity doing research presentation in the 49th Annual Conference ofversity. Sharing idea and conducting valuable discus-

blue removal from synthetic wastewater. As shown onsion during poster session would contribute for devel-

the Table 1

oping further research.

%-)(!) was lower than $'.!) at 0.05 g/L― S-66 ―