scholarly journals Combination of Ozonation and Adsorption Using Granular Activated Carbon (GAC) for Tofu Industry Wastewater Treatment

2018 ◽  
Vol 18 (4) ◽  
pp. 600
Author(s):  
Eva Fathul Karamah ◽  
Ika Putri Adripratiwi ◽  
Linggar Anindita
Keyword(s):  
Activated Carbon ◽  
Hydroxyl Radical ◽  
Waste Treatment ◽  
Environmental Pollutants ◽  
Liquid Waste ◽  
Granular Activated Carbon ◽  
Degradation Process ◽  
Adsorption Method ◽  
Ozonation Process ◽  
Industry Wastewater

Tofu industry wastewater is one of the environmental pollutants that need more effective treatment. Ozonation and adsorption method is known to have the capability to oxidize organic compound in wastewater. Adsorption is done by using granular activated carbon (GAC) as an adsorbent to increase tofu wastewater degradation process by adsorbing organic materials and increasing production of hydroxyl radical as the main oxidizing agent. This research is carried out to evaluate the performance of ozonation, adsorption, and combination of both in processing tofu wastewater. To evaluate the significance of ozone dosage and amount of GAC used, these variations are varied which are 60, 111, and 155 mg/h of ozone dosage and 50, 75, and 100 g of the amount of GAC used. Parameters of the process are organic substances of tofu wastewater such as COD, TSS, and pH. The measurements are being done using a spectrophotometer, colorimeter, and pH meter. The outcome of this research is to provide an alternative method in the liquid waste treatment of the tofu industry and the processed wastewater to meet the environmental quality standards. The more ozone and the more quantity of GAC used, the higher the quantity of hydroxyl radicals formed. Addition of GAC in the ozonation process results in more than 100% increase in hydroxyl radical production. Combination of ozonation and adsorption is able to remove 377.12 mg/L of COD and 26 mg/L of TSS.

scholarly journals Removal of Methylene Blue of Textile Industry Waste with Activated Carbon using Adsorption Method

REAKTOR ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 168-171
Author(s):  
Maryudi Maryudi ◽  
Shinta Amelia ◽  
Siti Salamah
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Textile Industry ◽  
Waste Treatment ◽  
Liquid Waste ◽  
Mesh Size ◽  
Treatment Technology ◽  
Adsorption Method

The colorant that is often used in the textile industry is methylene blue which is a cationic heterocyclic aromatic compound. This compound is very stable and is difficult to decompose naturally leading to environment in large concentrations. Therefore, a waste treatment technology to reduce the concentration of dye waste in water becomes importannt. So far, adsorption method with activated carbon remains the most efficient and effective technique in removing dyes from liquid waste due to its relatively large adsorption capacity. Activated carbon is one of the non-metallic mineral commodities or multipurpose industrial minerals, one of which is as an adsorbent or adsorbent media. This study aims to determine the potential of activated carbon in adsorbing methylene blue with variations in the concentration of methylene blue and particle size of activated carbon. The procedures in this experiment include, the preparation of activated carbon with size variations (20-60, 60-100 and> 100 mesh) and variations in the concentration of methylene blue (15 ppm, 30 ppm and 45 ppm) with contact time (0 to 180 minutes). From the results of the study, it was found that the smaller the size of activated carbon used, the greater the adsorption capacity, ie at mesh size> 100 mesh, the adsorption capacity was 9.8%. Whereas, the smaller the concentration of methylene blue, the activated carbon could work optimally at a concentration of 15 ppm at 30 minutes with adsorption capacity as high as 100%.Keywords: adsorption; Methylene Blue; activated carbon; concentration; time; particle size

Effects of molecular oxygen on GAC adsorption of energetics

1997 ◽  
Vol 35 (7) ◽  
pp. 197-204 ◽  
Author(s):  
Sarah L. VanderLoop ◽  
Makram T. Suidan ◽  
Sandra R. Berchtold ◽  
Moustafa A. Moteleb ◽  
Stephen W. Maloney
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Molecular Oxygen ◽  
Waste Treatment ◽  
Granular Activated Carbon ◽  
Adsorption Properties ◽  
Chemical Degradation ◽  
Degradation Reactions ◽  
Gac Adsorption

Munitions wastewaters are commonly treated by granular activated carbon (GAC) adsorption followed by incineration of the spent carbon. The design of effective GAC unit processes hinges on the knowledge of GAC adsorption capacity for the compounds of interest as well as the types of chemical interactions to expect. GAC can often catalyze polymerization or chemical degradation of the adsorbate in the presence of molecular oxygen. Some adsorbates, though less common, may be subject to catalytic activity even when no molecular oxygen is present. The products of these interactions may enhance or interfere with effective waste treatment. This study individually evaluated the adsorption properties of a variety of energetics compounds. A number of surface catalyzed polymerization and degradation reactions were noted.

Efektivitas Kombinasi Kitosan dan Ampas Teh Sebagai Adsorben Alami dalam Menurunkan Konsentrasi Timbal Pada Limbah Cair PT PXI

2021 ◽  
Vol 20 (1) ◽  
pp. 37-44
Author(s):  
Dhonny Suwazan ◽  
Nisa Nurhidayanti
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Textile Industry ◽  
Liquid Waste ◽  
Chemical Properties ◽  
Adsorption Method ◽  
Industry Waste ◽  
Living Things ◽  
Physical And Chemical ◽  
Pb Concentration

ABSTRAKLogam berat merupakan salah satu bahan kimia berbahaya yang dapat menimbulkan bahaya bagi lingkungan dan makhluk hidup karena memiliki toksisitas yang tinggi dan tidak dapat terbiodegradasi sehingga menjadi bioakumulasi pada rantai makanan. Dalam limbah cair yang dihasilkan pada industri tekstil terdapat salah satu logam berat yaitu timbal (Pb) yang digunakan sebagai pengikat zat warna. Salah satu metode penghilangan logam berat pada limbah cair yaitu metode adsorpsi menggunakan biosorben. Biosorben yang digunakan pada penelitian ini adalah campuran antara kitosan dan karbon aktif dari ampas teh. Tujuan dari penelitian ini untuk menentukan efektivitas penurunan konsentrasi Pb menggunakan adsorben alami dengan kombinasi kitosan dan ampas teh. Tahap awal dilakukan pengujian kandungan logam berat pada PT PXI dan diperoleh kandungan awal logam Pb sebesar 1,02 mg/L. Kemudian dilakukan sintesis adsorben hasil kombinasi kitosan dan karbon aktif dari ampas teh. Hasil karakterisasi diperoleh kadar karbon terikat sebesar 78,09%. Karakterisasi dilanjutkan untuk mengetahui sifat fisika dan kimia biosorben dilakukan menggunakan FTIR dan SEM-EDS. Hasil karakterisasi menggunakan FTIR didapatkan gugus fungsi O-H yang berperan dalam proses adsorpsi, hasil SEM-EDS menunjukan peningkatan kualitas struktur pori dan komposisi unsur dari kitosan yang telah di sintesis dengan ampas teh. Biosorben kombinasi kitosan dan karbon aktif dari ampas teh diaplikasikan sebagai adsorben dalam penghilangan logam berat Pb pada limbah industri tekstil PT PXI dengan variasi massa adsorben. Analisa konsentrasi Pb dilakukan menggunakan AAS. Hasil penelitian menunjukkan bahwa dengan penambahan karbon aktif ampas teh sebesar 1,4 gr menghasilkan persen efektivitas tertinggi dalam penghilangan logam berat Pb sebesar 90,6% dan dapat menurunkan konsentrasi hingga 0.1 mg/L sehingga dapat memenuhi baku mutu yang dipersyaratkan.ABSTRACTHeavy metal is one of the hazardous chemicals that can pose a danger to the environment and living things because it has high toxicity and cannot be biodegraded so that it becomes bioaccumulation in the food chain. In the liquid waste produced in the textile industry there is one heavy metal, namely lead (Pb) which is used as a dye binder. One method of removing heavy metals in liquid waste is the adsorption method using a biosorbent. The biosorbent used in this research is a mixture of chitosan and activated carbon from tea dregs. The purpose of this study was to determine the effectiveness of reducing Pb concentration using a natural adsorbent with a combination of chitosan and tea dregs. The initial stage was testing the heavy metal content of PT PXI, the initial Pb content was 1.02 mg/L. Then the synthesis of the adsorbent resulting from the combination of chitosan and activated carbon from tea dregs was carried out. The results of the characterization obtained bound carbon content of 78.09%. Characterization was continued to determine the physical and chemical properties of biosorbents using FTIR and SEM-EDS. The results of characterization using FTIR obtained O-H functional groups that play a role in the adsorption process, the SEM-EDS results showed an increase in the quality of the pore structure and elemental composition of chitosan that had been synthesized with tea dregs. Biosorbent combination of chitosan and activated carbon from tea dregs was applied as an adsorbent in the removal of heavy metal Pb in textile industry waste PT PXI with variations in adsorbent mass. Pb concentration analysis was carried out using AAS. The results showed that the addition of 1.4 g of tea dregs activated carbon produced the highest percentage of effectiveness in the removal of heavy metal Pb by 90.6% and could reduce the concentration to 0.1 mg/L so that it could meet the required quality standards. 

Synthetic shampoo liquid waste treatment with ozonation: Case study with peroxone and activated carbon

2019 ◽  
Author(s):  
Natasha Vidi Salsabila ◽  
Fidelis Ayodya Amba ◽  
Eva Fathul Karamah ◽  
Setijo Bismo
Keyword(s):  
Activated Carbon ◽  
Waste Treatment ◽  
Liquid Waste

Photocatalytic and Photochemical Degradation of Liquid Waste Containing EDTA

2011 ◽  
Author(s):  
C. Lepeytre ◽  
C. Lavaud ◽  
G. Serve
Keyword(s):  
Radioactive Waste ◽  
Waste Treatment ◽  
Process Development ◽  
Degradation Products ◽  
Liquid Waste ◽  
Degradation Process ◽  
Decontamination Factor ◽  
Photochemical Degradation ◽  
Degradation Degree ◽  
Radioactive Waste Treatment

The decontamination factor of liquid waste containing 60Co is generally weak. This is due to the presence of complexant molecules. For instance, complexation of EDTA with 60Co decreases efficiency of radioactive waste treatment. The aim of this study was to degrade EDTA in H2O and CO2 and to concentrate free 60Co in order to increase decontamination factor. A first test of radioactive waste treatment by photocatalysis was allowed to increase decontamination factor (60Co) from 16 to 196 with a device requiring to be improved. The present work concerns the first step of the degradation process development with a more powerful device. These first experiments were leaded to follow the only EDTA oxidation. EDTA degradation was carried out by the following Advanced Oxidation Processes (AOP): UV/H2O2 (photochemistry); UV/TiO2 (photocatalysis); UV/TiO2/H2O2. A specific reactor was achieved for this study. The wavelength used was 254 nm (UVC). The photocatalytic degradation of EDTA was carried out with Degussa P-25 titanium dioxide (TiO2), which is a semiconductor photocatalyst. The degradation degree of EDTA and the intermediate products were monitored by TOC and ionic chromatography methods. The effects of various parameters such as pH and the quantity of H2O2 were studied. This allows us to conclude that basic pH slows down EDTA degradation. The study showed that UV/H2O2 process was the most effective treatment process under acid conditions. The rate of EDTA degradation was very high and reached 95% in 120 minutes. The presence of glyoxilic, oxalic, glycolic and formic acids was detected as degradation products. Among the intermediates produced by photochemistry, NO3− ions presence informed of the amine degradations. These results highlighted faster EDTA degradation by photochemistry than photocatalysis.

Removal of humic substances using solar irradiation followed by granular activated carbon adsorption

2010 ◽  
Vol 10 (1) ◽  
pp. 15-22 ◽  
Author(s):  
X. Liu ◽  
C. S. B. Fitzpatrick
Keyword(s):  
Activated Carbon ◽  
Humic Substances ◽  
High Performance ◽  
Granular Activated Carbon ◽  
Size Exclusion ◽  
Solar Irradiation ◽  
Activated Carbon Adsorption ◽  
Adsorption Method ◽  
Additional Energy ◽  
Gac Adsorption

This study proposed a new method using freely available sunlight and granular activated carbon (GAC) adsorption for enhanced removal of humic substances (HS). Experiments were carried out under natural sunlight conditions in winter and summer. A parabolic solar collector (PC) was applied to concentrate solar energy. HS were characterized by UV254 absorbance, dissolved organic carbon (DOC) concentration and molecular weight (MW). As a result of solar irradiation, decreases of DOC up to 14% in winter and 58% in summer were observed. A comparison of adsorption isotherms and chromatograms of the irradiated and non-irradiated HS confirmed that smaller molecules formed during solar irradiation were preferentially adsorbed by GAC. A dramatic MW change upon solar irradiation was observed in HS irradiation in PC in summer experiment and almost no UV254 detected components were remaining in solution after adsorption (GAC dose 400 mg/L), as measured with high performance size exclusion chromatography (HPSEC). The combined solar irradiation-GAC adsorption method proved to be effective in enhancing HS removal by GAC with no additional energy and chemicals consumption.

scholarly journals Processing and Utilization of Tempe Liquid Waste to be Organic Fertilizer

2018 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Okki Putra P ◽  
Wahyu Nursantoso ◽  
Fajar Adi N ◽  
Sigit Yunanda
Keyword(s):  
Waste Treatment ◽  
Fine Particles ◽  
Organic Fertilizer ◽  
Liquid Waste ◽  
Chemical Properties ◽  
Inorganic Materials ◽  
Adsorption Method ◽  
Liquid Fertilizer ◽  
The Media ◽  
Materials Used

The activities of KKN-Tematik program of Industrial Engineering Department conducted in Dukunanyar Village, Dukun Sub-district of Gresik Regency is to provide knowledge and implementation to Small and Medium Industry (IKM) tempe how to manage and utilize tempe liquid waste so as not to pollute the environment. Processing of tempe liquid waste using Adsorbtion method and filtering its function to neutralize liquid waste of tempe. Adsorption is a process of separating water from impurities by absorption of impurities such as fine particles, dissolved cations or odors contained in wastewater. The media used are zeloid stone, activated carbon and charcoal husk. Filtering is the process of irrigation or purification of water to produce clean water, free of odors, organic materials and inorganic materials contained therein. The media used are fibers, sand, and krikil. In addition to processing liquid waste tempe with adsorption method and filtering of liquid waste tempe can be utilized as Liquid Fertilizer Productive (PCP). Productive Liquid Fertilizer (PCP) is a way of utilizing tempe liquid waste with highorganic content to improve soil chemical properties to be better so that the productivity of the plant has increased. For materials used in the manufacture of Liquid Fertilizer is liquid waste tempe and fluid starter EM4. By using appropriate tools for liquid waste processing and utilization of tempe liquid waste into a productive Liquid Fertilizer (PCP) on an ongoing basis can create the integration of appropriate waste treatment, and environmentally friendly

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