acid recycling Articles

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 ...

Mar. 5, 2010

By Inderscience Publishers

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 ...

Oct. 1, 2010

By Inderscience Publishers

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, ...

Jun. 27, 2007

By Inderscience Publishers

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, ...

Feb. 1, 2005

By Springer-Verlag GmbH

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 ...

Apr. 27, 2016

By IWA Publishing

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 pH ...

Sep. 6, 2016

By IWA Publishing

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 ...

Dec. 6, 2010

By Inderscience Publishers

ABSTRACT The Traverse City (Michigan) Regional Wastewater Treatment Plant has been successfully converted from a conventional plant into a membrane bioreactor-based facility. When commissioned in July 2004, the plant was the largest Membrane Bioreactor (MBR) facility in North America (32,000 m3/day, 8.5 mgd, during the maximum month). The facility is designed to achieve strict effluent ...

Oct. 13, 2007

By Water Environment Federation (WEF)

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 ...

May 20, 2014

By IWA Publishing

We have wholesale plastic bottles for sale! Medicinal plastic bottles are blow-molded plastic bottles used to package medicines, liquid medicines, solvents, chemical reagents in plastic containers.   Pharmaceutical plastic bottles are generally made of PE, PP, PET and other materials. They are not easy to break, have good sealing ...

Nov. 20, 2019

By Nantong Size Plastic Co.,Ltd.

Environmentally conscious hospitals that find themselves with a glut of dying and dead batteries have an easy and readily available cure: Recycling. Whether ubiquitous alkalines, lead-acid, lithium or other types of batteries, recycling companies and independent brokers have programs in place nationwide/worldwide to make disposing of conked out power cells a simple matter. There’s also always the ...

Nov. 1, 2009

By Security Shredding & Storage News

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. ...

Jan. 4, 2013

By Benzaco Scientific, Inc.

In an attempt to control CaCO3 deposits in industrial recycling water systems, the performance of acrylic acid (AA)–allylpolyethoxy carboxylate (APEL) copolymer as an economical and environmentally friendly inhibitor have been investigated by static experiments, scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The experimental results revealed ...

Feb. 15, 2017

By IWA Publishing

The tail gas from a single absorption sulfuric acid plant typically contains 2000-3000 ppmv of unreacted SO2. Emission regulations for new plants in most jurisdictions today require cleanup of this stream prior to discharge into the atmosphere and many grandfathered units are being required to decrease emission levels. The current paradigm is to add a second stage of conversion, which reduces the ...

Sep. 8, 1997

By Shell Cansolv – Gas absorption solutions

Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum ...

Jan. 1, 1998

By The World Bank

Water is a finite resource. Its safety and cleanliness are highly important to meet current and future human needs. Compared to other resources, water represents a main factor to achieve development in several areas and leads to economic progress of a nation. However, in recent years, the excessive demographic and industrial growth has exacerbated water contamination. In this study, the ...

Jan. 4, 2018

By IWA Publishing

Recycling areas: Various scrap Company name: MPI Recycling (MPI Reciklaža Metalurgija, plastika inženiring d.o.o.) Located: Črna na Koroškem, Slovenia Founded: 1990 Employees: 86 TAB is a Slovenian producer of lead acid flooded, VRLA AGM and VRLA Gel ...

Mar. 26, 2019

By Eldan Recycling A/S

The Client Our Client is a secondary lead smelting plant, based in Europe, that produces mainly lead ingots for automotive car batteries, lead alloys and lead shot for hunting and sport shooting. The Challenge The Client has a recovery plant for lead acid batteries, capable of separating the different components of batteries by wet system, with ...

Oct. 23, 2013

By EVALED-Evaporator

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 ...

Aug. 9, 2019

By Oil Skimmers, Inc.

Human beings have been dumping waste in water, including the ocean, since before the Agricultural Age. The Industrial Age brought with it new materials to dump, chemical wastes and by-products. Some materials are dumped into rivers and find their way to the ocean by running downstream. Other materials are dumped directly into the ocean from boats. Plastic is a harmful pollutant that does not ...

Jun. 19, 2014

By ABCOV Companies , LLC