AWWA ACE61846

The selection of the most appropriate treatment technology for arsenic, perchlorate, and nitrate isa challenge, and must take into account the ultimate fate of the generated liquid or solid waste.A treatment technology that provides good treatment performance in one location may not besuitable for other locations due to the limited discharge options, or distance to disposal facility,etc. This project investigated treatment alternatives for residuals from arsenic, perchlorate, ornitrate treatment processes, a step which had been often overlooked in the past when making aprocess selection.The water quality needs to be thoroughly characterized even if individual contaminant levelsmay be lower than the drinking water guidelines. Many technologies concentrate contaminants inwaste streams, and this may result in residual levels that exceed discharge or disposalregulations. In order to effectively implement a treatment system, understanding the local, state,and federal drinking water regulations (current and future) as well as discharge and disposalguidelines are critical steps. It is also important to recognize that each project is unique and thatoverall arsenic, perchlorate, and nitrate management requires a multifaceted approach thatintegrates technology, cost, regulation, and the public.An integrated approach must be used when defining and designing new treatment processes forthese contaminants to fully understand and capture all potential issues associated with wastesgenerated during treatment process. The potential type of residuals from the selected treatmentapproaches identified earlier can significantly increase the overall cost to produce water. Thus,types of residuals produced (e.g. liquid, solid, high brine), local discharge and disposalregulations (types and limits), proximity to regeneration, disposal and discharge facilities, capitaland O&M cost for residual treatment, should be carefully considered in developing fullyintegrated residual management approach. Includes 33 references, tables.

Product Details

Edition:

Vol. - No.

Published:

06/17/2005

Number of Pages:

17

File Size:

1 file , 1.2 MB