acid recycling Articles
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Acid recycling in steel pickling plants: state-of-the-art and new developments in environmental protection
For acid pickling of heat-treated mild steel and steel products for up to the middle of the last century, sulphuric acid was primarily in use, which has been replaced since the 1960s stepwise by hydrochloric acid. During this time, also the pickling of high alloyed steel with hydrofluoric acid or mixtures of hydrofluoric acid together with nitric acid has been applied on industrial scale. The ...
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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 ...
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Effect of acetic acid in recycling water on ethanol production for cassava in an integrated ethanol–methane fermentation process
Recently, the integrated ethanol–methane fermentation process has been studied to prevent wastewater pollution. However, when the anaerobic digestion reaction runs poorly, acetic acid will accumulate in the recycling water. In this paper, we studied the effect of low concentration of acetic acid (≤25 mM) on ethanol fermentation at different initial pH values (4.2, 5.2 or 6.2). At an initial ...
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Acid dye removal from industrial wastewater by adsorption on treated sewage sludge
This study investigated the suitability of sewage sludge for the removal of Acid Blue 93 industrial wastewater. Washed sewage sludge (WS) and sludge activated carbon (AS) were used as adsorbents. The effect of pH, contact time, adsorbent dose and adsorption temperature was studied. Equilibrium isotherms for the adsorption were analysed by Freundlich and Langmuir isotherm models. The ...
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Assessment of nanofiltration and reverse osmosis potentialities to recover metals, sulfuric acid, and recycled water from acid gold mining effluent
This work assessed the potential of nanofiltration (NF) and reverse osmosis (RO) to treat acid streams contaminated with metals, such as effluent from the pressure oxidation process (POX) used in refractory gold ore processing. NF and RO were evaluated in terms of rejections of sulfuric acid and metals. Regarding NF, high sulfuric acid permeation (∼100%), was observed, while metals were ...
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An Eco-balance of a Recycling Plant for Spent Lead–Acid Batteries
This study applies Life Cycle Assessment (LCA) methodology to present an eco-balance of a recycling plant that treats spent lead–acid batteries. The recycling plant uses pyrometallurgical treatment to obtain lead from spent batteries. The application of LCA methodology (ISO 14040 series) enabled us to assess the potential environmental impacts arising from the recycling plants operations. Thus, ...
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BUILD BACK BETTER: AQUA METALS IS THE ONLY COMPANY ALIGNED WITH U.S. GOVERNMENT LITHIUM-ION BATTERY RECYCLING VISION
As part of the Biden administration’s Bipartisan Infrastructure Law, the Department of Energy recently announced $3.1 billion in funding for battery manufacturing and recycling. The incentives are part of the over $7 billion the infrastructure bill provides for improving the domestic battery supply chain. “As electric cars and trucks continue to grow in popularity within the United ...
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Benzaco scientific`s ODOR-ARMOR® helps meet operational acceptance within a community
The Problem - Since 1997, a Northeastern United States recycled paper mill has been under the scrutiny of the Department of Enviromental Protection (DEP) for odor complaints from the surrounding community. The neighboring community had the power to close the plant because of the smells. Either the mill resolved the odor problems or the DEP and the community would force the plant to close. The ...
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How to recycle electronic waste circuit boards?
Electronic waste circuit boards have great residual value due to the presence of high-grade precious metals (~28% weight) such as Au, Ag, Cu, Pd, Ta and so on. In addition, the metallic grade in waste circuit boards is more than a hundred times of that in natural mineral resources. Now how to recycle the electronic waste circuit boards has become a hotly debated issue in the 21st century. To ...
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POWERING THE NEW ENERGY ECONOMY: HEEDING LESSONS FROM THE PAST AS WE BUILD THE NEW ELECTRICAL REVOLUTION
In the late 19th century, the first Electrical Revolution lit up the world. Now, electricity courses across continents and in the devices we use every day. Revolutions accelerate history–the speed of change–and a new electrical energy revolution is afoot. Electric vehicles, wind turbines, and an increasingly digitized economy represent the face of our current ...
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LITHIUM-ION BATTERY RECYCLING BY THE NUMBERS: QUANTIFYING THE RIGHT CHOICE
We are riding the tipping point in electric vehicle adoption. Following a recent ruling from the California Air Resources Board, by 2035 all new cars sold in California will be zero emission, which likely means predominantly lithium-ion powered. Massachusetts has already declared its intent to follow California’s lead and considering that at least 15 states have previously adopted ...
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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, ...
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Anaerobic fermentation of organic solid wastes: volatile fatty acid production and separation
Anaerobic fermentation of organic municipal solid waste was investigated using a leach-bed reactor (LBR) to assess the volatile fatty acid (VFA) production efficiency. The leachate recycle rate in the LBR affected the VFA composition of the leachate. A six-fold increase in the recycle rate resulted in an increase of the acetic acid fraction of leachate from 24.7 to 43.0%. The separation ...
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IMI, Pakistan Factory supply for recycling of lead acid batteries with cap. 120 Tons / day - Case Study
Sector Batteries recycling plant (full factory) Commissioned IMI - (International Metal Industries Pvt, Ltd) Country PAKISTAN Performed activities Engineering, procurement, realization and installation supervision Material Stainless steel AISI 316 Capacity of the plant 120 Tons/day of exhausted batteries In 2016, the GME Recycling Company, signed the contract for the Battery Recycling Plant ...
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Generating energy with green gas, without horizon pollution
America wastes roughly 40 percent of its food, which equals 125 to 160 billion pounds of food that goes to waste every year (Natural Resources Defense Council, 2017). For example, suppose that we are wasting 240 Mt on a daily basis, which is 10 tons per hour. If we assume that our waste has a gas yield of 220m³/Mt, this means that our patented Sulaway® system will generate 2200 m³ of raw gas and ...
By Gazpack B.V.
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MONBAT, Italy Factory supply for recycling of lead acid batteries with cap. 15 Tons / hour - Case Study
Sector batteries recycling plant (revamping battery breaker + paste desulfuration) Commissioned MONBAT ITALY SRL Country ITALY Performed activities engineering, procurement, realization and installation supervision Material stainless steel AISI 316 Capacity of the plant 15 Tons/hour of exhausted batteries In 2017, the GME Recycling Company, signed the contract for the Battery Recycling ...
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FABCOM, Algerie Factory supply for recycling of lead acid batteries with cap. 80 Tons / day - Case Study
Sector batteries recycling plant (full factory) Commissioned FABCOM SARL Country ALGERIA Performed activities engineering, procurement, realization and installation supervision Material stainless steel AISI 304/316 Capacity of the plant 80 Tons/day of exhausted batteries Factory supply for recycling of lead acid batteries with cap. 80 Tons / day, the supply includes 5 tons/hour battery ...
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Acid-base waste gas treatment process
1. Overview of acid and alkali waste gas Industrial acid and alkali waste gas mainly comes from the acid and alkaline waste gas emitted during the production process of the chemical, electronics, metallurgy, electroplating, textile (chemical fiber), food, machinery manufacturing and other industries. The discharge indoors is harmful to human health and is discharged outdoors. It is harmful to ...
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Rohm & haas chemical plant - Case study
Evaporator Limits Boron to 5 PPM at Award-Winning Chemical Plant Reprinted from Chemical Processing PROBLEM: The biggest challenge confronting Rohm & Haas Corp. in building a wastewater plant for its chemical facility in Elma, WA, was meeting Washington State Department of Ecology limitations on boron of 5 ppm. The Elma plant manufactures sodium borohydride, a versatile chemical used in a ...
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Clearing the air on OSHA indoor air quality
OSHA and other environmental watch dogs don’t officially regulate indoor air quality (IAQ), but most manufacturers follow best practices when it comes to their indoor work environments, because they understand the ROI benefits of less downtime and improved productivity. Additionally, while OSHA does not currently enforce IAQ standards, all employers, including manufacturers, are expected to ...
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