The wave of globalization in manufacturing has led to new manufacturing processes being implemented in locales that do not have previous experience with industrial wastewater discharges, much less with the impacts that the contaminants, which may be present in these discharges, have on human health and the environment.

Metal finishing is a prime example of the type of industry that has expanded on a worldwide basis. This article details the impacts that metal finishing operations may have on the local water supplies and the types of treatment systems options available to make these discharges safe for the environment.

 

Wastewater generated by industry runs the gamut from those termed as “hazardous” and “toxic” to those termed as “conventional pollutants”. Wastewater characteristics vary considerably from one industry to another and oftentimes vary greatly among plants within the same industry. In addition, significant variations in flow and contaminant levels occur hourly within the same plant.

Add into the mix that industrial facilities must meet locally developed limits and in some cases federally imposed “categorical” limits. These limits may be administered by the local governing authority (LGA), the state environmental protection department, or the federal Environmental Protection Agency (EPA), depending on who has been delegated this authority.

These factors make managing industrial discharges a very complex and challenging venture for the industrial facility. Complete Water Services and our staff have been assisting industrial facilities with the management of their water resources for many years.

Water and wastewater treatability studies range from relatively simple field tests to complex bioassays. Treatability studies can be used by experienced professionals to determine treatment for non-conventional contaminants such as molybdenum and complex mercury. Simple “jar tests” are also performed daily by the treatment plant operator to determine the proper amount of coagulants and flocculants needed for proper removal. This is true for water and wastewater from both industrial and municipal sources.

If you have a body of water or wastewater that has a very difficult or non-conventional contaminant, it is recommended that an experienced specialist assist with performing these treatability studies. CWS and our team of professionals is very experienced with most types of treatability studies and are available to assist you in determining the most feasible and cost effective treatment scheme for your water or wastewater. The following is a sample of treatability studies performed by our staff:

  • Complex mercury reduction and removal at a former chemical plant and Superfund site. The treatment plant won the state’s “Plant of the Year” award.
  • Bioassay to determine biological treatment design criteria for a very large manufacturer of water and wastewater treatment polymers. This plant also won the states “Plant of the Year” award for an industrial plant utilizing Land Application Systems.
  • Treatability study to simulate ammonia reduction by air stripping and pH adjustment for a latex manufacturer and an imaging chemical manufacturer.
  • Performed over 75 individual “jar tests” on a waste stream containing molybdenum at a facility that manufactured barbeque grills. Numerous chemicals were tested included conventional ferric based coagulants, sulfide based coagulants and carbamates.
  • Treatability of phosphorus laden waste stream at a vegetable oil extraction plant and refinery. The tests included coagulation/flocculation followed by a pilot scale bioreactor to determine biological phosphorus uptake.

CWS has assisted numerous clients for many years with less complex studies generally associated with day-to-day treatment plant operations.

In addition, CWS provides pro bono training at the Georgia Water and Wastewater Institute, (www.gwwi.org) in industrial wastewater. The GWWI is a premier water and wastewater training institute in the USA. A “jar test” demonstration is used as part of the class. The power point training presentation used by CWS can be viewed by clicking Metals Finishing Treatment Class.

Water and wastewater treatability studies range from relatively simple field tests to complex bio assays.

Treatability studies can be used by experienced professionals to determine treatment for non-conventional contaminants such as molybdenum and complex mercury. This is true for water and wastewater from both industrial and municipal sources.

If you have a body of water or wastewater that has a very difficult or non-conventional contaminant, it is recommended that an experienced specialist assist with performing these treatability studies.

CWS and our team of professionals have completed many studies, such as:

  • Complex mercury reduction and removal at a former chemical plant and Superfund site. The treatment plant won the state’s “Plant of the Year” award.
  • Bioassay to determine biological treatment design criteria for a very large manufacturer of water and wastewater treatment polymers. This plant also won the states “Plant of the Year” award for an industrial plant utilizing Land Application Systems.
  • Treatability study to simulate ammonia reduction by air stripping and pH adjustment for a latex manufacturer and an imaging chemical manufacturer.
  • Performed over 75 individual “jar tests” on a waste stream containing molybdenum at a facility that manufactured barbeque grills. Numerous chemicals were tested included conventional ferric based coagulants, sulfide based coagulants and carbamates.
  • Treatability of phosphorus laden waste stream at a vegetable oil extraction plant and refinery. The tests included coagulation/flocculation followed by a pilot scale bioreactor to determine biological phosphorus uptake.

CWS has assisted numerous clients for many years with less complex studies generally associated with day-to-day treatment plant operations.