วารสารวิชาการเทคโนโลยีอุตสาหกรรม (J. Ind. Tech.) อยู่ในฐานข้อมูล TCI กลุ่ม 2 (2563) มีค่า JIF = 0.094 | The Journal of Industrial Technology (J. Ind. Tech.) is indexed in TCI Tier 2 (2020) with impact factor, JTIF 0.094

Articles

Low C/N Ratio Composting of Excess Sludge from Activated Sludge Wastewater Treatment System of Concentrated Latex Industry

Environmental and Meterial Engineering

This article presents an experimental result of low C/N ratios with ranges of 3.2:1 to 5.9:1 of composting of excess sludge from activated sludge wastewater treatment systems of concentrated latex factories. The composting experiments were investigated based on test conditions of different compost materials used, with aeration and with no aeration, as well as with seeding and without seeding. In addition, the investigation on the possible use of the obtained compost products as fertilizer on plant growth was conducted. The results indicated that composting was not reached in the thermophilic and mature phases. The slow decomposition of OC occurred during 90 days composting. Loss of N was significantly determined, in particular in the aerated composting units, but K increment was observed. The results indicated that the composting of mixtures of excess bio-sludge, ash, and coconut husk with and without seeding and aeration made compost products compliant with Thai organic fertilizer standards, especially in terms of pH, P2O5, K2O, As, Cd, Cr, Cu, Pb, and Hg. With the results tested on plant growth, the possibility of the use of compost products as fertilizer as experimented with marigolds, illustrated that compost products from a mixture of excess bio-sludge, ash, and coconut husk with seeding and aeration had potential to be used as fertilizer which was equivalent to 15:15:15 chemical fertilizer, in particular in terms of plant height increase rate and numbers of flowers achieved.

Emission and Dispersion of Metals in Particulate Matter from Pottery Industry

Environmental and Meterial Engineering

One of the critical environmental issue of a local pottery production industry is an air pollution emission from burning process without control systems. This may seriously cause health and environmental impacts. This study analyzed particulate matter (PM) concentration and its metal composition released from the wood-fueled burning process of the pottery production. Prediction of the pollutants dispersion was also performed using AERMOD model. A pottery factory in Muang district, Ratchaburi province was selected as a case study. PM sampling was performed at stack s furnace throughout the burning process in two production cycles. PM were quantified by means of gravimetric method. A number of 15 metal elements in PM were then analyzed by using the ICP-OES instrument. The results found that averaged PM emission was 131 mg/m3. There were totally 8 metal species found as follow: Fe, Al, Zn, Mg, Ni, Cr, Mn and Cu. The model s dispersion estimations showed PM alignments agreed with wind roses of the study area. The 24-hours-highest PM concentration (averaged both of the two production cycles) and the hazardous metals – Cr, Mn and Ni – were found below the national ambient PM10 standard and health related guidelines, respectively.

Production of Polyhydroxyalkanoates Bioplastic from Palm Oil using Pseudomonas aeruginosa TISTR 1287

Environmental and Meterial Engineering

This research aimed to investigate factors affecting the production of polyhydroxyalkanoates (PHAs) from palm oil as a carbon source by Pseudomonas aeruginosa TISTR 1287. The experiments were set-up a batch in an orbital shaker incubator at 30๐C with 180 rpm. Four concentrations (0.50, 0.75, 1.00, 1.50 and 2.00 % (w/v)) of palm oil were tested and initial pH in the culture medium was fixed at 6.90. The results showed that the concentrations of palm oil have the effect on cell growth and cell dry weight of P. aeruginosa TISTR 1287. The maximum cell dry weight at 44 hrs was 2.33 g L-1 obtained from the palm oil concentration of 0.75% (w/v). Moreover, the culture time also affected the cells growth and intracellular accumulation of PHAs. The PHAs concentration and content were increased when increasing the culture time from 0 to 72 hours. The maximum PHAs concentration was 0.65 g L-1 and PHAs content was 38.01 % when cultured in medium with 0.75% (w/v) palm oil at 72 hrs fermentation. The microbial cells in the culture medium showed high red fluorescent, when the cells were determined using the fluorescent dye Nile red. The PHAs granules of intracellular the microbial cell were seen easily (white granules) by transmission electron microscope. The results demonstrated that P. aeruginosa TISTR 1287 can be used palm oil as a carbon source for producing the PHAs based bioplastics in an intracellular.

The Solid Waste Management from Fresh Market and Green Residues in Prince of Songkla University, Pattani Campus

Environmental and Meterial Engineering

management of solid waste from fresh markets and from Prince of Songkla University. The aim of this study was to analyze the physical and chemical properties of waste and residues. Findings revealed that, in Pattani Municipality fresh market, there was 2.00 tons of waste a day on average, with the density of 0.70 kilogram per cubic meter. The waste found included 1. vegetable residues (53.78%), 2. fruit residues (19.56%) and 3. paper residues (15.33%), retaining moisture of 86.78. It was also found that in the fresh market there was the waste sorting to feed animals including catfish, ducks, and goats. For the green residues on the University, they were from grass mowing, tree pruning, and landscape gardening. The average amount of the green residues is 300.00 kilograms per day. In terms of management, there were three approaches; fertilizer fermentation, waste dumping in the open space, and animals feeding. Mostly, waste dumping in the open space for natural decomposition consumed plenty of space, therefore the collecting of organic residues from two different sources to ferment together is a practical approach for organic waste management and soil fertilization production.

Possibility study for water reutilization of the biodiesel refinery in Thailand

Environmental and Meterial Engineering

The specific characteristic of wastewater from the palm oil refinery is the oil contamination. The optimum condition of oil-water separation was studied under various operations. Increasing of the wastewater treatment system efficiency with the suitable operation of an oil scum skimmer regard to the suitable effluent quality for utilization. In recent times, water reutilization has applied for water management planning in various organization. The possibility of water reutilization planning was evaluated under various factors. Furthermore, the questionnaire was developed to survey the attitude about water reutilization. This is an important parameter for design the suitable water reutilization option. In this study, it was found that the oil-water separation should be operated under the pH 4.0-5.9 with retention time around 4-5 days. This was an optimum condition for oil scum skimmer pretreatment. The treated wastewater quality was calculated to find the alternative reutilize options. This was investigated with the user acceptance for water reutilization application. It was found that around 90 percent of respondent agreed with applying of water reutilization in the company. This would be investigated with water quality, water volume, and economic factor. The evaluated result presented that the treated water could be reutilized or reused for combine activity option. This option can be reduced 433.97 baht/day from the conventional cost of water supply operation in the company.

Enhancement of Eco-Efficiency Performance for Tread Product Process by Clean Technology

Environmental and Meterial Engineering

This research was to develop the enhancement of eco-efficiency performance of tread product processes by clean technology. Firstly, environmental and economic of eco-efficiency indictors was developed for evaluating performance of tread product processes during 2010-2012. Then, enhancing eco-efficiency approach of tread product processes was developed by clean technology concept. The result of performance evaluation for tread product process by eco-efficiency showed that energy consumption and water use was highest and lowest values of eco-efficiency, respectively. From the result of eco-efficiency trend by snapshot graph analysis showed that electric consumption, water use and carbon emission of tread product process located in Fully Non-Eco-Efficiency, which was the change level of decreased economic will coincide with the increasing environmental impact. Besides, this finding was according to the result of the eco-efficiency value found that the water use was highest resource consumption of production process. Moreover, the clean technology concept was applied for developing approach of enhancing eco-efficiency of tread product process found that the training providing of water use and consumption for worker and the reuse of final leaching water was acknowledged by tread industry due to the immediate implementation and no cost.

Evaluation of the Alternative Energy Development Plan

Environmental and Meterial Engineering

In 2015, the government has launched new Alternative Energy Development Plan (AEDP 2015), which was revised from Alternative Energy Development Plan – 25% in 10 year (AEDP 2012–2021). In order to induce the new AEDP 2015 effectively, it is crucial to investigate previous progression and information. Therefore, the objective was to analyze the effect of AEDP 2012–2021 on Thailand s alternative energy consumption, between 2009–2014, using Context-Input-Process-Product model (CIPP model). Data were collected from statistical information, interviewing and group seminar. The results found that AEDP 2012–2021 conformed to the context of country s energy situation. The government has systematically planned both managerial and financial structures, including a well-organized driving process. Monitoring and improving processes were conducted regularly. The statistical results reported that the alternative energy consumption were higher than the annual goals and presented a trend which can achieve the 25% substitution in 2021. However, the government still has to support and develop alternative energies in both technological and public awareness for the advance, secure and sustainable plan.

Identification of bacteria and yeast communities in a Thai sugary kefir by Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) analyses

Environmental and Meterial Engineering

The microbial diversity of Thai sugary kefir was identified for the first time by Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) analysis. The V3 regions of 16S bacterial rDNA and 18S rDNA of yeasts in both kefir grains and kefir fermentates were analyzed. Acetic acid bacteria Gluconobacter japonicus and Bacillus cereus were identified with 99% similarity to the GenBank database. Other bacteria species, including Lactobacillus rhamnosus, were also identified with less than 97% similarity. Two yeast species, namely Saccharomyces cerevisiae, Candida ethanolica, were identified with 99% similarity to the GenBank database. Sugary kefir grains and fermentates have higher diversity of bacteria communities than yeast communities. In comparison with the microorganisms found in sugary kefir cultured in different parts of the world, Lactobacillus paracasei, Lactobacillus rhamnosus, Bacillus cereus, and Saccharomyces cerevisiae were the common species also found in a Thai kefir. This study is the first time to find the yeast Candida ethanolica in sugary kefir. Morphology of sugary kefir grains revealed that bacteria and yeasts spread throughout the grains. Yeast communities are located on the outer portion of kefir grains and the bacterial communities are located on the inner portion of kefir grains.

Wastewater Treatment by SBR Zeolite-Chitosan

Environmental and Meterial Engineering

This research aims to determine the amount of zeolite-chitosan adsorbent and comparatively study efficiencies of SBR and SBR zeolite-chitosan systems for removals of ammonium (NH4-N) and chemical oxygen demand (COD). The ratio between aerated and unaerated period was 6:2 and the sludge retention time (SRT) was controlled at 10 days. Synthetic wastewater having COD values between 500 and 1300 mg/L was used. Results found that the maximum adsorption capacity (qm) of NH4-N was 13.15 mg/g for zeolite-chitosan adsorbent. The NH4-N removal efficiencies at different the average initial COD concentration of 510, 1010 and 1280 mg/L were 76, 73 and 71% respectively in the SBR zeolite-chitosan system and 65, 65 and 60% respectively in the SBR system. As well, efficiencies for COD removal of SBR-zeolite-chitosan system were 83, 94 and 94% at average initial COD concentration of 510, 1010 and 1280 mg/L, respectively. The COD removal efficiency of SBR system was 78, 91 and 91% at average initial COD concentration of 510, 1010 and 1280 mg/L, respectively. It was clear that the SBR zeolite-chitosan system yielded better and stable treatment efficiency than conventional SBR system.

Removal of Lead from Synthetic Wastewater using Aquatic Plants

Environmental and Meterial Engineering

Abilities of aquatic plant species, Echinodosus cordifolius (L.) Griseb., Bacopa caroliniana (Walt.) Rob., and Hydrocotyle umbellata L., for phytoremediation of lead (Pb) from synthetic wastewater were conducted in hydroponic system at 20-80 mg/L of Pb (II) and 7-28 days of exposure periods. Additional experimental set up for aquatic plant species under 60 and 80 mg/L of Pb (II) were added with 5 mM EDTA in order to enhance Pb accumulation in the plants. Results revealed that the capacity of Pb (II) accumulation at 80 mg/L of Pb (II), 28 days in roots of all aquatic plants was higher than that of shoots. E. cordifolius (L.) Griseb. had the highest capacity of Pb (II) accumulation about 12,566 (roots) and 8,686 (shoots) mg/kg dry wt, respectively giving 95% of Pb (II) removal, followed by H. umbellata L. and B. caroliniana (Walt.) Rob., respectively. Regarding EDTA addition, lead accumulation (80 mg/L of Pb (II), 7 days) was increased in the roots of H. umbellata L. about 19,883 mg/kg dry wt and it was increased in the shoots of E. cordifolius (L.) Griseb. about 14,516 mg/kg dry wt (80 mg/L of Pb (II), 21 days), respectively. The highest relative growth (13.85) and percentage of biomass productivity (98%) were in H. umbellata L. (60 mg/L of Pb (II), 7 days), whereas the highest bioconcentration factor (9,341.68) was in E. cordifolius (L.) Griseb.(80 mg/L of Pb (II), 21 days). According to the results, E. cordifolius (L.) Griseb. was recommended to remove the lead from synthetic wastewater with EDTA addition. Further studies in contaminated wastewater under various characteristics and flows should be investigated.

Assessment of surface water quality using multivariate statistical techniques: A case study of the Nampong River Basin, Thailand

Environmental and Meterial Engineering

This study investigates the spatial water quality pattern of 13 stations located along the main Nampong River. Multivariate statistical methods, namely, the hierarchical agglomerative cluster analysis (HACA), the discriminant analysis (DA), the principal component analysis (PCA), and the factor analysis (FA), were used to study the spatial variations of the most significant water quality variables and to determine the origin of pollution sources. Sixteen water quality parameters were initially selected and analyzed. Two spatial clusters were formed based on HACA. These clusters are designated as upper part (U/P) of Nampong River and lower part (L/P) of Nampong River regions. Forward and backward stepwise DA managed to discriminate ten water quality variables, from the original 16 variables. PCA and FA (varimax functionality) were used to investigate the origin of each water quality variable due to land use activities based on the two clustered regions. Five principal components (PCs) were obtained with 69.806% total variation for the moderate-pollution source region, while five PCs with 69.327% total variances was obtained for the low-pollution source region. The pollution source for the L/P is of anthropogenic sources (industrial, municipal waste, and agricultural runoff). For the U/P region, the agricultural runoffs are the main sources of pollution. This study concluded the application of multivariate statistical methods to reduce the large number of water quality parameters down to manageable number.

Effect of the sludge recirculation rate on the performances of a two-stage anoxicsubmerged membrane bioreactor (A-SMBR) for the treatment of seafood wastewater

Environmental and Meterial Engineering

The objective of this research is to study the effect of the sludge recirculation rate on the performance of two-stage anoxic-submerged membrane bioreactor (ASMBR) for the treatment of seafood wastewater. The seafood wastewater presents the biodegradable of containing high values of organic matter (COD around 2750 mg.L-1) and organic nitrogen compounds (TKN around 484 mg.L-1). Four values of recirculation rates, from 1/8 to 3 times the inflow rate, were studied during a long operational period. The MBR reactor was operated in subcritical flux conditions and no sludge extraction was done during the whole experimental period. The overall efficiency for the COD and nitrogen compound removal rate was on average 95+3% and 98+2% respectively. The residual COD, TKN and NO3 --N concentration in the effluent were 23+4 mg.L-1, 1.2+0.9 mg.L-1 and 29+9 mg.L-1 respectively. In terms of filtration, trans-membrane pressure (TMP) showed a small and constant values in the membrane reactor with a TMP value of around 5-10 mbars. Membrane fouling appeared linked with the soluble organic compound interactions on the membrane surface (irreversible fouling).The quality of treated water met with the standard of wastewater reuse for all classes (A to D) issued by USEPA.

Get alert for journal's news

Get alert for journal's news. You can recieve journal up-to-date information by giving your email to us.