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Articles 1 - 3 of 3
Full-Text Articles in Engineering
Developing A Protocol For An Environmentally Preferable Purchasing Plus (Epp+) Program At Nasa Glenn Research Center, Amarin Kongtawelert
Developing A Protocol For An Environmentally Preferable Purchasing Plus (Epp+) Program At Nasa Glenn Research Center, Amarin Kongtawelert
ETD Archive
EPP+ or Environmentally Preferable Purchasing Plus is a Environmentally Preferable Purchasing program with incorporated a unique Life Cycle Assessment (LCA) scoring system which implemented at NASA, Glenn Research Center. A protocol has been developed to aid in selecting among products based on principles of Environmentally Preferable Purchasing (EPP) and Life Cycle Assessment (LCA). The protocol has been developed for use at NASA Glenn Research Center (GRC) but is intended to benefit anyone wishing to make sustainable purchasing decision. The protocol was designed as a web-based application which evaluates the life cycle factors, affirmative procurements, price, and performance of products that …
Biological Treatment Of Milk And Soybean Wastewater With Bioproducts, Tianzhu Bi
Biological Treatment Of Milk And Soybean Wastewater With Bioproducts, Tianzhu Bi
ETD Archive
Dairy industries discharge larger amounts of wastewater as compared to other food industries. Wastewater contains high amount of total organic carbon materials and nutrients, such as fat, protein, and lactose. Biological treatment is widely used to treat this kind of wastewater due to the fluctuation of amount and content of dairy wastewater. This study investigated removal of total organic carbon (TOC) from two types of dairy wastewater-milk and soy milk wastewater. The bioproducts used in experiments were baker's yeast, beer's yeast, live liquid microorganism (LLMO), Enforcer Overnite Toilet Care Liquid, and Enforcer Overnite Toilet Care Granular. The parameters included in …
A Risk-Based Approach For Examining Vertical Separation Distances In On-Site Wastewater Treatment Sytems, Anthony M. Janicek
A Risk-Based Approach For Examining Vertical Separation Distances In On-Site Wastewater Treatment Sytems, Anthony M. Janicek
ETD Archive
Regulations regarding the use of on-site wastewater treatment systems in many states lack a sufficient scientific basis, which in many cases restricts the use of on-site systems, drives up cost, and restricts innovation of new treatment technologies. Of particular regulatory concern is the minimum vertical separation distance (VSD) located in the area between the trench bottom of the subsurface soil absorption system and any restricting or limiting layer. The minimum VSD needed for proper effluent treatment is based on many complex and interrelated factors regarding physical, chemical, and biological soil conditions at a particular site. Research has shown that depending …