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Courtesy of IWA Publishing
An investigation was performed to evaluate the uptake capacity of
Hydroponic cultivation of lettuce (Lactuca sativa) using effluents from primary, secondary and ...
ABSTRACTThe aim of this study was to evaluate the potential cultivation of lettuce (Lactuca sativa) with domestic wastewater effluents with different levels of treatment from a compact WWTP in Brazil. Vegetables were grown in five treatments: nutrient solution (control), secondary effluent diluted 50%, secondary effluent not diluted, tertiary effluent UV irradiated, and UASB effluent. Microbiological analyses from leaves showed low levels of contamination with E. coli, thermotolerant coliforms and total coliforms....
Elemental Chlorine-Free (ECF): Pollution Prevention for the Pulp and Paper Industry
Imagine being in charge of a chemical company. One day a fire breaks out, and an employee, designated as a first responder, is killed fighting the blaze. Then OSHA investigators discover that the man died primarily because both his training and his equipment were inadequate. This scenario is why CPL 2-2.59A should put anyone who runs a HAZMAT facility into a state of introspection. These employers need to ask themselves: `When was the last time that our Emergency Response Plan was brought up to date? Do our...
Troubleshooting the Compost Pile
While composting is a biological process, we as composters must provide the microorganisms that do the work with the conditions they need to do their job. If there is a problem with the system, then look at it from the point of view of the microbe. What does that microbe need to function, and why isn’t it functioning correctly? Microorganisms need a source of energy organic feedstocks to feed on and draw energy. Some of that released energy causes the compost pile to heat. Besides energy, organisms need nutrients...
University and Company Team Up for Composting and Recycling
Sodexho Marriott Services is a food and facilities management company that operates in the corporate, health care and education markets. Its expertise is rooted in areas such as meals, landscaping, housekeeping, plant operations, etc. But for the past several years, the company has teamed up with New Mexico State University (NMSU) to run a campus composting and recycling program that utilizes advantages of both the corporate and collegiate worlds. Started in July, 1994, the cooperative solid waste management...
Common Treatment Train for Inorganics
A treatment train is the combination of different treatment technologies. A system diagram of a common treatment train for inorganics is illustrated below. Metal contaminated soil is treated using the combination of electrokinetics and phytoremediation. Electrokinetics is used to remove metals from deep soil and ground water. A low density direct current is applied to mobilize charged species, causing ions and water to move toward the electrodes. Metal ions move toward the cathode, and anions move toward anode....
Containment for Soil, Sediment, and Sludge
Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, unrealistic cost, or lack of adequate treatment technologies. Containment treatments offer quick installation times and...
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