Ask the Expert Question-and-Answer Archive
(Wastewater Treatment)

by Mike McGinness, EcoShield Environmental Systems, Inc.

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Please read this disclaimer: Mike McGinness is an independent consultant and is not employed by the EPA or any government agency or private organization. The answers that he provides are based solely on his personal opinion and do not reflect the policy of this hosting website, the EPA or any other organization. Although he makes every attempt to provide answers that are correct, he does not always have a full understanding of the background to the question and therefore he cannot guarantee the correctness of his answers. Therefore, they are to be taken solely as a guide, and the reader is encouraged to make additional inquiries before pursuing a course of action to resolve his/her problem.

Browse the Archive by Date

May, 2008

• Nitric Aidic Pickle Liquor Waste Treatment
• 433.10 Metal Finishing Subcategory

March, 2008

• Total Organic Carbon Reduction

October, 2007

• Lead Extraction from Carbon Steel
• Listed as Metal Finishing Part 413, 433

July, 2007

• HNO₃ Waste Treatment

March, 2007

• Cement-Based Treatment of Plating Sludges

January, 2007

• Electrowinning dilute copper sulfate
• Treatment of Hydrofluoric Acid Waste
• Alternatives to Chrome Passivates

November, 2006

• Blowers
• 40 CFR Part 413, 433 and 465
• Clarifier

December, 2006

• Chrome Passivate Alternatives

November, 2006

• Blowers
• 40 CFR Part 413, 433 and 465
• Clarifier

October, 2006

• Wastewater Ventilation
• Metal in Wastewater
• Mercury in Burnishing Wastes
• Oily Waste to Anerobic Digester

September, 2006

• Water Minimization in the Plating Industry

May, 2006

• Dilution, Excessive Rinsing

April, 2006

• Wastewater Treatment Systems Operator Certification

April, 2005

• Trouble Precipitating Nickel Stripping Solution
• Finding Source of Cyanide in Pretreat Line

March, 2005

• Trouble Precipitating Molybdenum

February, 2005

• Large Month-to-Month Changes in BOD, TSS

July, 2003

• COD Defined

June, 2003

• Cleaning Oil and Grease From the Surface of Stainless Steel

May, 2003

• Monitoring of Specific Gravity of Wastewater

April, 2003

• Reducing COD in wastewater
• Hazardous Materials and Waste Rules

March, 2003

• Emissions From a Phosphating Dip Line
• Waste Treatment Costs

February, 2003

• Hexavalent Chromium on Parts
• Heavy Metals in Powder Coatings
• Automated Composite Sampling Systems

January, 2003

• Lime or Sodium Hydroxide?
• Will MP&M effect me?

December, 2002

• Zinc Waste Treatment
• Wastewater From Chemical Etching of Stainless Steel

November, 2002

• Waste Stream Costs From Copper Electroplating

August, 2002

• Wastewater From a Lead-Acid Battery Washing Operation
• Treating Wastewater from Soak Cleaner and Degreasing Operations

July, 2002

• Metal Precipitation in a Full Biological Treatment Plant

June, 2002

• Wastewater Recycling
• Treating Concentrated Cyanide Waste

April, 2002

• Phosphating, Parts Cleaning Definitions With Repect to 40 CFR 433

March, 2002

• Pollution From Metal Finishing Operations
• Water Use in Metal Finishing Operations
• Black Oxide

February, 2002

• Paint Manufacture and its Pollutants
• Dimethyldithiocarbamate (DTC)
• DI and RO Systems for Decorative Nickel Chrome Line
• Ultrafiltration (UF) vs. Microfiltration (MF) for an Iron Phosphating Solution

January, 2002

• Best Practices for Cyanide Treatment
• Meeting POTW COD Limits