acid recycling Articles | Environmental XPRT

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 ...

Mar. 5, 2010

By Inderscience Publishers

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 ...

Oct. 1, 2010

By Inderscience Publishers

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, ...

Jun. 27, 2007

By Inderscience Publishers

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 ...

Apr. 27, 2016

By IWA Publishing

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 ...

Sep. 6, 2016

By IWA Publishing

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 ...

Dec. 6, 2010

By Inderscience Publishers

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, ...

Feb. 1, 2005

By Springer-Verlag GmbH

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 ...

May 4, 2021

By Gazpack B.V.

Enhanced Biological Phosphorus Removal Performance of the Traverse City MBR

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 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 ...

May 20, 2014

By IWA Publishing

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 ...

Oct. 3, 2020

By Gianni Mori Engineering S.r.l. (GME)

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 ...

Jan. 4, 2013

By Benzaco Scientific, Inc.

PLASTIC BOTTLE

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 performance, moisture-proof, hygienic, and meet the special ...

Nov. 20, 2019

By Nantong Size Plastic Co.,Ltd.

Hospitals get charge out of recycling batteries

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

SULFURIC ACID PLANT TAIL GAS CLEANUP WITH CANSOLV“ SYSTEM SO2 SCRUBBING TECHNOLOGY

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 ...

Sep. 8, 1997

By Shell Cansolv – Gas absorption solutions

Double-hydrophilic block copolymer as an effective and green scale inhibitor in industrial recycling water systems

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

Lead and Zinc Smelting Industry - Pollution Prevention Guidelines

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 emissions ...

Jan. 1, 1998

By The World Bank

Lead and Polypropylene Materials from Car Batteries - Case Study

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 batteries. They run three modern production factories with approx. 900 employees. TAB was established in 1965 as a subsidiary ...

Mar. 26, 2019

By Eldan Recycling A/S

Biodepuration of domestic sewage, textile effluents and acid mine drainage using starch-based xerogel from recycled potato peels

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

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 ...

Oct. 3, 2020

By Gianni Mori Engineering S.r.l. (GME)