Recycling of used catalysts – reactivation of
... has been previously separated by distillation. It is often possible there after the material can be profitably recycled rather than using land-fill. ...
... has been previously separated by distillation. It is often possible there after the material can be profitably recycled rather than using land-fill. ...
Lecture 3_Decision Making
... Standards and guidance documents on environmental management, eco-labeling, auditing, life-cycle assessment, and environmental performance evaluation. Calls for environmental policies that represent a commitment to environmental compliance and pollution prevention Module 3: Solid waste, Wastewater a ...
... Standards and guidance documents on environmental management, eco-labeling, auditing, life-cycle assessment, and environmental performance evaluation. Calls for environmental policies that represent a commitment to environmental compliance and pollution prevention Module 3: Solid waste, Wastewater a ...
Evaluation of Treatment Techniques for Selenium Removal
... marketed. One system, marketed as iBIO™ by Infilco Degremont, is a typical suspended growth (activated sludge type) reactor system (Stover et. al. 2007, Stover and Pudvay 2007). The other system marketed by GE/Zenon is the ABMet process which consists of a packed-bed activated carbon system impregna ...
... marketed. One system, marketed as iBIO™ by Infilco Degremont, is a typical suspended growth (activated sludge type) reactor system (Stover et. al. 2007, Stover and Pudvay 2007). The other system marketed by GE/Zenon is the ABMet process which consists of a packed-bed activated carbon system impregna ...
Example exam questions2006
... than oxygen are used to build up a proton gradient that allows ATP generation via the ATP synthase. In contrast to oxygen respiration, anaerobic respirations form reduced endproducts, which can in turn serve as the electron donor for aerobic bacteria. Explain with an example the endproduct that is f ...
... than oxygen are used to build up a proton gradient that allows ATP generation via the ATP synthase. In contrast to oxygen respiration, anaerobic respirations form reduced endproducts, which can in turn serve as the electron donor for aerobic bacteria. Explain with an example the endproduct that is f ...
CHAPTER 6
... universally accepted - except that the term typically implies that some level of treatment beyond conventional secondary processes is involved. A specific definition can vary somewhat depending on whether the application addresses research, design, or operations. Within the scope of design and opera ...
... universally accepted - except that the term typically implies that some level of treatment beyond conventional secondary processes is involved. A specific definition can vary somewhat depending on whether the application addresses research, design, or operations. Within the scope of design and opera ...
CE: 461
... obtaining low effluent COD values. This means that very high biomass concentration must be maintained in the reactor to achieve reasonable rates of substrate utilization. In suspended growth systems, maintenance of high biomass concentration is only possible if the biomass escaping from the reactor ...
... obtaining low effluent COD values. This means that very high biomass concentration must be maintained in the reactor to achieve reasonable rates of substrate utilization. In suspended growth systems, maintenance of high biomass concentration is only possible if the biomass escaping from the reactor ...
Ten Guidelines for Aquaponic Systems
... schedules should be manipulated in such a way as to achieve average daily feed input to the system of 20,000 g (44 lbs) if a feeding rate ratio of 100 g/m2/day is desired. The optimum feeding rate ratio depends on many factors such as type of hydroponic system, plants being cultivated, chemical comp ...
... schedules should be manipulated in such a way as to achieve average daily feed input to the system of 20,000 g (44 lbs) if a feeding rate ratio of 100 g/m2/day is desired. The optimum feeding rate ratio depends on many factors such as type of hydroponic system, plants being cultivated, chemical comp ...
Wastewater as a Valuable Resource
... are used. Transport costs for reclaimed water can be high, because centralized facilities are typically located at the lowest elevation downhill - and often far - from water users. Distributed treatment systems can be more cost effective, because they serve specific localities and are closer to the ...
... are used. Transport costs for reclaimed water can be high, because centralized facilities are typically located at the lowest elevation downhill - and often far - from water users. Distributed treatment systems can be more cost effective, because they serve specific localities and are closer to the ...
Septic System Tanks
... factors will impact the tank efficiency and the amount of sludge it retains. The greater the liquid’s surface area, the more sewage the tank can accommodate. As solids collect in the tank, the water depth decreases, which reduces the time sewage flow is retained in the tank. Less solids will settle ...
... factors will impact the tank efficiency and the amount of sludge it retains. The greater the liquid’s surface area, the more sewage the tank can accommodate. As solids collect in the tank, the water depth decreases, which reduces the time sewage flow is retained in the tank. Less solids will settle ...
Secondary treatment
Secondary treatment is a treatment process for wastewater (or sewage) to achieve a certain degree of effluent quality by using a sewage treatment plant with physical phase separation to remove settleable solids and a biological process to remove dissolved and suspended organic compounds. After this kind of treatment, the wastewater may be called as secondary-treated wastewater.Secondary treatment is the portion of a sewage treatment sequence removing dissolved and colloidal compounds measured as biochemical oxygen demand (BOD). Secondary treatment is traditionally applied to the liquid portion of sewage after primary treatment has removed settleable solids and floating material. Secondary treatment is typically performed by indigenous, aquatic microorganisms in a managed aerobic habitat. Bacteria and protozoa consume biodegradable soluble organic contaminants (e.g. sugars, fats, and organic short-chain carbon molecules from human waste, food waste, soaps and detergent) while reproducing to form cells of biological solids. Biological oxidation processes are sensitive to temperature and, between 0 °C and 40 °C, the rate of biological reactions increase with temperature. Most surface aerated vessels operate at between 4 °C and 32 °C.