acid waste Articles

  • Britannia Airways

    Britannia Airways, based at Luton Airport, has to maintain a permanent constant humidity level in its computer rooms and hangars in order to eliminate the build up of static electricity. The effi ciency of the humidifi ers supplied by Vapac and J.S. Humidifi ers Ltd was being severely compromised by the continual formation of heavy scale. The humidifiers required descaling within one month of ...

  • Geo-Environmental Assessment of a Micaceous Soil for Its Potential Use as an Engineered Clay Barrier

    The ability of the fine fraction of a natural micaceous soil in the Stanleyville area near Perth, Ontario, to retard an acidic waste leachate is examined. Batch and leaching column tests were used to investigate the retention capcity of the natural soil. To investigate the effect of ion competition on adsorption/desorption capacity of the soil, single and multi-components of Pb2+ and Zn2+ were ...


    By ASTM International

  • Bioconversion of restaurant waste into Polyhydroxybutyrate (PHB) by recombinant E. coli through anaerobic digestion

    The effect of temperature (30°C, 37°C, uncontrolled) and initial pH adjustment at pH 7 in the anaerobic digestion process was investigated to enhance the production of organic acids from restaurant waste. The highest organic acid level obtained was 39.6 g/L on the fifth day of fermentation conducted at 30°C and initial pH 7. The acids produced corresponded to 39.4% of the yield based ...


    By Inderscience Publishers

  • Canarina DESCAR software · wastewaters · iron and steel · commands 3

    Before you attempt to install and use the program, make sure your personal computer meets the hardware and software requirements shown in the following table. System requirements: Windows 95, 98, 2000 and XP CD-ROM drive RAM Memory: 16MB or higher Canarina DESCAR software · wastewaters · iron and steel · commands 3 It is interesting ...

  • IPEX Plenumline Acid Waste System helps North Carolina State University in Comprehensive Renovation

    North Carolina State University in Raleigh, N.C. was founded in 1889 and currently enrolls close to 30,000 undergraduate students. Even from its historic beginning, this century old university has managed to remain 'modern1 in an effort to recruit the Nation's brightest minds. Keeping with this trend, the Biology department recently expanded their facilities to match the rapidly increasing ...


    By IPEX, Inc.

  • Legacy planning

    The mining of precious and semi-precious metals, minerals and fossil fuel energy sources such as coal has long been a mixed blessing for the communities in which operations take place. Mining can offer a great deal of employment, especially in rural areas in need of industry, and significant and welcomed tax revenue. But the long-term environmental harm of mining has too often off-set, if not ...


    By FINN Corporation

  • Titanium Dioxide Wastewater

    A large amount of waste acid is produced in the production of titanium dioxide, a large amount of high-salt wastewater is generated in the post-treatment process, and some titanium dioxide is still lost after the CN filter. On the one hand, the titanium white industry suffers from increasingly strict Environmental constraints, on the other hand, waste acid, water, and titanium dioxide resources ...


    By Jiangsu Jiuwu Hi-tech Co

  • Titanium Dioxide Wastewater

    Titanium Dioxide Wastewater A large amount of waste acid is produced in the production of titanium dioxide, a large amount of high-salt wastewater is generated in the post-treatment process, and some titanium dioxide is still lost after the CN filter. On the one hand, the titanium white industry suffers from increasingly strict Environmental constraints, on the other hand, waste acid, water, and ...


    By Jiangsu Jiuwu Hi-tech Co

  • Titanium Dioxide Wastewater

    A large amount of waste acid is produced in the production of titanium dioxide, a large amount of high-salt wastewater is generated in the post-treatment process, and some titanium dioxide is still lost after the CN filter. On the one hand, the titanium white industry suffers from increasingly strict Environmental constraints, on the other hand, waste acid, water, and titanium dioxide resources ...


    By Jiangsu Jiuwu Hi-tech Co

  • Bulk Storage and Piping Case Study

    Background: This major steel manufacturer was founded in 1900 in and established the first formal research department in the steel industry in 1910. It grew through the development of specialty steels and new technology. Among the many "firsts" was the development of continuous rolling technology. This company holds more U.S. patents than any other specialty steel company. ...


    By Mech-Chem Associates, Inc.

  • Peroxy-acid treatment of selected PAHs in sediments

    In an attempt to address some of the disadvantages of the common biotic and abiotic processes used for the degradation of Polycyclic Aromatic Hydrocarbons (PAHs), an alternative strategy utilising a primary chemical oxidative step to be combined with a biological post-treatment step was created. The degradation of α-methylnaphthalene, fluorene, phenanthrene, anthracene, pyrene and ...


    By Inderscience Publishers

  • Galvanising Company - Case Study

    Off-spec production reduced by 60% with diffusion dialysis and reverse osmosis A galvanising company in the Netherlands continuously cleans its anodizing baths containing sulphuric acid with a combination of diffusion dialysis and reverse osmosis. Different baths contain different levels of sulphuric acid. It is important that the quality of the anodizing bath and the rinse ...


    By Paques Technology B.V.

  • Exergy analysis of the process of wet-process phosphoric acid production with full utilisation of sulphur contained in the waste phosphogypsum

    The wet-process phosphoric acid is produced by decomposition of phosphate raw materials with sulphuric acid. This gives a large amount of waste product-phosphogypsum. The thermochemical decomposition of phosphogypsum gives a gas rich in SO2. This gas is processed to obtain sulphuric acid, which is fed back into phosphoric acid production. The aim of this paper is to perform exergy analysis of the ...


    By Inderscience Publishers

  • The current situation of solid waste management in China

    With economic development, the quantity of solid waste is increasing rapidly in China; the total quantities of municipal solid waste (MSW), industrial solid waste (ISW), and hazardous waste (HW) in 2002 were 136.5 million tons, 945 million tons, and 10 million tons, respectively. In 2002, the quantity of MSW disposed of was 74.04 million tons, 89.30% of which was landfilled, 3.72% was ...


    By Springer-Verlag GmbH

  • The study of the recovery of highly purified terephthalic acid from alkali weight-reduction wastewater

    A new process has been developed for recovering the terephthalic acid (TPA) with high purity from alkali weight-reduction wastewater. Three methods were used to purify the mother liquor: coagulation-sedimentation, carbon adsorption and the combination of these two methods. The results show that the nature of the TPA is greatly improved by coagulation-sedimentation or by carbon adsorption, ...


    By Inderscience Publishers

  • Quantitative microbial community analysis of three different sulfidic mine tailing dumps generating acid mine drainage

    The microbial communities of three different sulfidic and acidic mine waste tailing dumps located in Botswana, Germany, and Sweden were quantitatively analyzed using quantitative real-time PCR (Q-PCR), fluorescence in situ hybridization (FISH), catalyzed reporter deposition-FISH (CARD-FISH), Sybr green II direct counting, and the most probable ...

  • Controlling corrosion in the back end of fuel cycle using nitric acid grade stainless steels

    The materials for use in nitric acid service have to be resistant to intergranular corrosion and have low general corrosion rates. End grain corrosion resulting from inclusions and segregation along dislocation bands needs to be minimised. The Nitric Acid Grade of stainless steel resistant to these corrosion problems has been indigenously produced. It is emphasised that proper fabrication ...


    By Inderscience Publishers

  • Wyman Gordon Case Study

    Wyman-Gordon is a world class materials company with nearly 200 years of metals engineering experience. They are the acknowledged leader in the production of high-quality closed-die forgings and extrusions for the most critical applications. Markets served include those for commercial and military aircraft; gas turbine engines; oil and gas exploration; land based gas turbine and power generation; ...


    By Mech-Chem Associates, Inc.

  • An environmental oriented model for optimum cut-off grades in open pit mining projects to minimize acid mine drainage

    Environmental concerns on mining activities started near the end of the 20th century and is still underway. Due to mining activities, the adverse environmental impact has been significant throughout the history of mankind, whereas the minerals produced by mining activities have been providing the basis for human civilization. The legacy of past mining practices is large quantities of acid ...

  • Recovery of nickel from spent catalyst by single- and multi-stage leaching process

    Nickel-supported catalyst is used in petroleum, fertiliser and iron industries. This research studied the possibility of recovering nickel by leaching the ground catalyst with sulphuric acid. The leaching was done in single stage and multi-stages. The results obtained in single-stage leaching showed that the percentage recovery of nickel increased with increasing acid concentration used up to 25% ...


    By Inderscience Publishers

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