metals in wastewater Articles

Industrial Wastewater Treatment Success Stories Wastewater Treatment Metals Removal Ton Nerve Gas Agent Container Rinse Waters ...

May 6, 2007

By Integrated Engineers Inc.

The Facility A specialty metals facility located in Euclid, Ohio rolls, forms, cuts and presses specialty metals for the aircraft and aerospace, auto and electrical industries. This plant specializes in high value molybdenum and tungsten, as well as copper parts. The Problem As a result of the metal rinsing processes in the facility discharged water into ...

Sep. 13, 2010

By Aquatech International Corporation

Industrial Wastewater Treatment Success Stories Metals and Finishing Industrial Wastewater Treatment Aircraft Components - 80% Cost Reduction ...

Mar. 28, 2007

By Integrated Engineers Inc.

Integrated Engineers, Inc. conducted the below treatability on a Metal Processing facility that uses soluble machine coolants in their machining process; below are the ...

Jan. 28, 2009

By Integrated Engineers Inc.

Integrated Engineers, Inc. conducted the below treatability on a Metal Processing facility that uses soluble metal cutting oils in their machining process; below are the results. The treatment required no pH adjustment from the 7.0 pH. The best product was treated with 0.679 grams of Floccin-HP (powdered) in a 100 ml sample and required moderate mixing. The dosage equates to a treatment of 56 ...

Jan. 28, 2009

By Integrated Engineers Inc.

The analysis of wastewater for trace metal contamination is an important step in ensuring human and environmental health. Wastewater is regulated differently in different countries, but the goal is to minimize the pollution introduced into natural waterways. In the U.S., the Environmental Protection Agency (EPA), in conjunction with the states, negotiates a discharge permit through the National ...

Oct. 27, 2011

By PerkinElmer, Inc.

Integrated Engineers, Inc. conducted a treatability test for a facility that polishes stainless steel. We were asked to assist them in meeting their local discharge requirements as the flocculant they had been using was not working sufficiently. The initial pH of the wastewater upon arrival was 7.0. 3.0 grams of Floccin-G was used per 1000 ml jar of wastewater. After mixing for 10 minutes, the ...

Jan. 28, 2009

By Integrated Engineers Inc.

Effective Breaking of the Oil Emulsion in Machine Shop Wastewater This is the result of our Floccin 1105 product treating a sample from a Metal machining facility. The sample was at a pH of 9 and CO2 was added to bring the pH down to neutral (pH at 7). The Floccin 1105 was very effective at clarifying the waste, breaking the strong oil emulsion and capturing the oil. The ...

May 23, 2012

By Integrated Engineers Inc.

Chemical Oxygen Demand (COD) determinations generate highly disruptive waste streams with chromium, mercury and silver. These should follow specific waste management approaches in search of environmental and economical benefits, for which this work reports simple chemical procedures allowing toxic metal removal. Chromium(VI) is reduced to chromium(III) and total chromium is precipitated with ...

Aug. 1, 2012

By Inderscience Publishers

Evaporator/Crystallizer Solves Pollution Problems The Facility A major industrial Fortune 500 company manufactures armored-tracked vehicles for the U.S. Army. The plant is located in York County, Pennsylvania. The Problem Aluminum and steel assemblies and parts undergo chemical dip and spray treatments before painting. The ...

Sep. 13, 2010

By Aquatech International Corporation

Phytotechnologies involving use of plants for pollutant removal gained importance during the last two decades. Terrestrial and aquatic plants possess high metal sorption capacity, and hence find their use as inexpensive materials for removing metals from environment. Aquatic biomass irrespective living or dead, exhibits capacity to remove heavy metals from wastewater. The sequestration of heavy ...

Dec. 2, 2009

By Inderscience Publishers

ABSTRACT Prior to constructing a new FOTW, Fort Knox had a history of exceeding KPDES effluent limitations for ammonia and BOD. The new 6 MGD FOTW solved the problem, but metals exceedances became an issue. The exceedances could be linked to several factors: low water-quality based effluent limitations (WQBELs) on the new KPDES permit, high background concentrations of some metals, and high ...

Dec. 31, 1998

By Weston Solutions, Inc

Chemical reduction was firstly employed to treat synthetic wastewaters of various compositions prepared to simulate the retentate stream of polyelectrolyte enhanced ultrafiltration (PEUF). With fixed Cu:polyethylenimine (PEI) monomer:dithionite molar ratio, increasing copper concentration increases copper removal efficiency. Under fixed Cu:dithionite molar ratio and fixed Cu concentration, ...

Jun. 16, 2015

By IWA Publishing

Chemical reduction was firstly employed to treat synthetic wastewaters of various compositions prepared to simulate the retentate stream of polyelectrolyte enhanced ultrafiltration (PEUF). With fixed Cu:polyethylenimine (PEI) monomer:dithionite molar ratio, increasing copper concentration increases copper removal efficiency. Under fixed Cu:dithionite molar ratio and fixed Cu concentration, ...

Jun. 16, 2015

By IWA Publishing

What is wastewater? Wastewater, the waste discharge that first comes to mind in any discussion of stream pollution, is the discharge of domestic wastewater, which contains a large amount of organic waste. Industry also contribute substantial amounts of organic waste, some of which comes from vegetable and fruit packing; dairy processing; meat packing; tanning; processing of poultry, ...

Jan. 11, 2014

By Environmental Services by Daniel L. Theobald

Heavy metals are discharged into water from various industries. They can be toxic or carcinogenic in nature and can cause severe problems for humans and aquatic ecosystems. Thus, the removal of heavy metals from wastewater is a serious problem. The adsorption process is widely used for the removal of heavy metals from wastewater because of its low cost, availability and eco-friendly nature. ...

Nov. 2, 2016

By IWA Publishing

The removal of heavy metal ions, Pb(II) and Cu(II), by adsorption using natural zeolite (NZ), synthesised zeolite (MCM-22) (SZ), and powdered activated carbon (PAC), were examined and compared. The influences of contact time, solution pH and adsorbate concentration have been tested in kinetic runs. The equilibrium sorption capacities of copper and lead ions on NZ, SZ and PAC were found to be ...

Jun. 7, 2009

By Inderscience Publishers

We have previously patented a process for the extraction of toxic and valuable metals from foundry sands using a thermostatted column. In this paper, we describe a similar device for the removal of toxic metals from wastewater sludge. The wastes were finely ground and suspended in an aqueous pulp, and 10-40g of mineral acid or sodium hydroxide were added to reach a pH of 2, 5, 7 and 10, together ...

Sep. 14, 2009

By Inderscience Publishers

In 2014, 25% of the sludge produced at Swedish municipal wastewater treatment plants was applied to agricultural land. Even though the Swedish heavy metal limits for sludge to be used in agriculture are amongst the most stringent in the EU, more stringent heavy metal limits are proposed. Most sludge applied to agricultural land is recycled within a certification system, Revaq. Revaq has ...

May 8, 2017

By IWA Publishing

Affinity separation is becoming well established for the purification and recovery of metals from industrial wastewaters. Although the method has been successfully applied on a bench-scale, there is a need for reaction engineering studies to scale-up the process for use in large-scale wastewater purification and recovery of valuable metals. In this study, a pilot-scale packed-bed reactor has been ...

Jan. 27, 2005

By Inderscience Publishers