659,421 research outputs found

    Fishing Industry Waste Water Treatment by Polyelectrolytes

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    The fishing industries consume huge amount of water and also produce tonnes of waste water from fish preservation and fish tanks. The fishing industry wastewater treatment can be done by sequence of treatment processes such as sedimentation, coagulation. Characteristics of fishing industry wastewater are the color is light brown, pH is 8, COD is 576.0mg/l, BOD3 is 185.0mg/l, VSS is 0.56mg/L, TSS is 110.5mg/l, conductivity is 39300.0µs/cm, oil and grease is 2.1mg/l, fecal coliform is >2400MPN, total phosphorous is 22.6mg/l, total nitrogen is 60.0mg/l, ammonical nitrogen i

    PENGGUNAAN TEKNOLOGI PLASMA CORONA DISCHARGE UNTUK MENURUNKAN KADAR WARNA, COD DAN TSS PADA LIMBAH CAIR INDUSTRI MINUMAN RINGAN

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    The soft drink production process resulting waste water contains high color, COD and TSS quality. General treatment for soft drink waste water usually using conventional method but this method became inefficient since highly cost on operational. Recent alternative method for waste water treatment is using plasma technology to decreasing the high quality of color, COD and TSS. Plasma formed in a reactor that comprises two electrodes which one connected with high voltage. The reactor resulting active species with high oxidation potential i.e. •OH, •O, •H, O3 and H2O2, and it have important role to removing organic compounds. This study is to discover the affectivity of plasma technology to degrade the quality of color, COD an TSS in soft drink waste water. Soft drink waste water treated in a rector with high voltage (16, 17, 18 kV) and circulation variation (1-6 times). The voltage and circulation variation influences the degradation of color, COD and TSS in waste water. The degradation of color, COD an TSS increases with higher voltage and more amount of circulation. The highest degradation of color, COD and TSS was attained in 18 kV with 6 circulations. The degradation percentages are 99,91 %, 98,72 % dan 98,66 whereas waste water pH before treatment reached 8 and in the end of treatment positioned around 7. The energy requirement to obtain this efficiency is 0, 0968 kWh with electrical cost is Rp. 1.473/m3. Key Word: corona discharge plasma, oxidation, active species, voltage, circulation

    Pre- and posttreatment techniques for spacecraft water recovery

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    The objective was to develop techniques for satisfactory pretreatment of waste water (urine and wash water) prior to recovery by distillation and satisfactory post-treatment of the recovered water and humidity condensate for purification to the high quality necessary for reuse. The effort included literature and laboratory investigations, feasibility evaluations of candidate approaches, and development of conceptual designs for a waste water pretreatment system and a recovered water post-treatment system

    Dairy waste water treatment by combining ozonation and nanofiltration

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    The aim of this investigation was to examine the applicability of the membrane technique and the effect of preozonation in dairy waste water treatment technology. The best degree of surfactant removal from model anionic surfactant solution by nanofiltration was achieved at 20 degrees C and 40 bar. Investigations on the effects of ozone treatment of the waste water indicated that preozonation decreased the flux and increased the chemical oxygen demand and surfactant removal efficiency. Ozone treatment enhanced the biodegradability of the retentate from 68.8% to 96.4%

    METHOD OF WASTE WATER TREATMENT AT ANIMAL CUTTING HOUSE GIWANGAN, YOGYAKARTA

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    Meat is a staple ingredient that supplies the needs of proteins needed by humans. The needs of meat in Indonesia continues to grow in line with population growth. Establishment Animal Cutting House (ACH) is one of the government's efforts to meet the needs of meat in Indonesia. Animal slaughter and cleaning activities conducted at ACH will produce remains solid and liquid wastes which, if not carried out the processing of such waste, especially waste water would pollute the waters as a liquid waste disposal sites ACH. The liquid waste results from ACH activity contain a number of organic materials might be harmful to aquatic biota can even cause death. The location of the data to compile this report is ACH Giwangan, Yogyakarta. The main data sources obtained from the field and other supporting data comes from books and internet media. In preparing this report, data analysis conducted on the volume, content, and methods of processing efficiency of wastewater treatment at ACH Giwangan for later comparison with the quality standards of existing waste water. The results of the analysis conducted, the data obtained for the volume of waste water per head of animals slaughtered amounted to 1.503 m3. Wastewater generated from activities at ACH Giwangan contains five important parameters, namely BOD, COD, TSS, pH and ammonia. The efficiency of wastewater treatment performed by WWTP unit produces levels decreased by 90.65% for BOD, 89.36% for COD, 86.54% to 33.09% for TSS and ammonia. Methods of wastewater treatment at ACH Giwangan done in two stages, namely processing physically and biologically. Physical processing is done by stage filtration and separation of fat, while the biological processing done by WWTP units using aerobic methods. In general, the levels of waste water parameters ACH Giwangan still within normal limits, except ammonia levels exceed the quality standards for wastewater ACH activity either by MOE (2006) as well as DIY Governor Regulation (2010). Key words: Waste, Waste water treatment, ACH

    ENZYMATIC WASTE WATER TREATMENT

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    Enzymes are biocatalysts provided by cells and are used in most metabolic methods. Most enzymes are consisting of proteins containing tertiary amino acid which bind to co enzyme or metal ions. Enzymes are accelerating biochemical processes by some mechanisms to chemical catalysts e.g metals, metal oxides and metal ions. Enzymes can be very effective under conditions e.g (temperature, atmospheric pressure and PH). Many enzymes have hydrolyzing, oxidizing and reducing characters. Enzymatic reactions always provide less side effects reactions and fewer waste by products. That is why microbial Enzymes can give an effective and environmental safe alternatives as metabolic inorganic chemical catalysts which can be used in all over pharmaceutical industrial processes. Enzymes are used in waste water treatment. Treatment technologies depend on physico-chemical approaches in wastewater treatment plants which require skills, high operation costs (in terms of high energy and chemical demand). Wastewater treatment is operated to protect the quality of limited freshwater resources, which are most times the final discharge points of effluents, and also, to promote the reusability of expended clean water; amounts of hazardous aromatic byproducts are still generated [3, 4]. The observation shows that wastewater treatment plants, though liable to remove microcontaminants such as heavy metals, and to a far lesser extent, aromatic contaminants, were originally structured for the removal of solid wastes, ecofriendly organic matter and eutrophication stimulants from wastewater, thereby reducing eutrophicating pollution loads; the micropollutants may only be moderately affected by the chemical, physical and biological interactions within the treatment plants.Enzymes are biocatalysts provided by cells and are used in most metabolic methods. Most enzymes are consisting of proteins containing tertiary amino acid which bind to co enzyme or metal ions. Enzymes are accelerating biochemical processes by some mechanisms to chemical catalysts e.g metals, metal oxides and metal ions. Enzymes can be very effective under conditions e.g (temperature, atmospheric pressure and PH). Many enzymes have hydrolyzing, oxidizing and reducing characters. Enzymatic reactions always provide less side effects reactions and fewer waste by products. That is why microbial Enzymes can give an effective and environmental safe alternatives as metabolic inorganic chemical catalysts which can be used in all over pharmaceutical industrial processes. Enzymes are used in waste water treatment. Treatment technologies depend on physico-chemical approaches in wastewater treatment plants which require skills, high operation costs (in terms of high energy and chemical demand). Wastewater treatment is operated to protect the quality of limited freshwater resources, which are most times the final discharge points of effluents, and also, to promote the reusability of expended clean water; amounts of hazardous aromatic byproducts are still generated [3, 4]. The observation shows that wastewater treatment plants, though liable to remove microcontaminants such as heavy metals, and to a far lesser extent, aromatic contaminants, were originally structured for the removal of solid wastes, ecofriendly organic matter and eutrophication stimulants from wastewater, thereby reducing eutrophicating pollution loads; the micropollutants may only be moderately affected by the chemical, physical and biological interactions within the treatment plants

    Submerged membrane bioreactor for waste water treatment: determination of the shear stresses produced by coarse bubbles

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    Submerged membrane bioreactor for waste water treatment: determination of the shear stresses produced by coarse bubble

    Treatment for hydrazine-containing waste water solution

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    The treatment for waste solutions containing hydrazine is presented. The invention attempts oxidation and decomposition of hydrazine in waste water in a simple and effective processing. The method adds activated charcoal to waste solutions containing hydrazine while maintaining a pH value higher than 8, and adding iron salts if necessary. Then, the solution is aerated

    Waste water treatment systems

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    Waste water treatment system
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