waste heat Articles

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Class a biosolids production at eastern municipal water district using heat pasteurization

Since 1998, the Eastern Municipal Water District (District) has developed and successfully operated a heat pasteurization facility to treat extended aeration waste activated sludge (WAS) from the Perris Valley Regional Water Reclamation Facility (PVRWRF). The treatment train uses hot water to sludge spiral heat exchangers and a patented ...

Landfills case study: Space heating with LFG: Small project-big savings

by Waste Advantage Magazine  (Feb. 1, 2011)

On a typical January morning in Minnesota, a landfill operator is working on the compactor’s transmission. Despite the four inches of snow on the ground, he opens the garage doors in the maintenance building to let out some of the excess heat. Unlike previous winters, this year the operator can afford to crank up the heat in the building ...

Heat Pump Used to Drain Contaminated Sludge in a Steel Factory

Summary In 1987, new regulations required that factories dispose of their contaminated water and waste themselves. Making galvanised steel wire, the Stelfil factory produces sludge contaminated with lead and zinc. Stelfil spent thousands of dollars to bury this waste and evaluated three systems to remove most of the water: a gas dryer, an ...

Exergetic performance of eco friendly absorption heat transformer for seawater desalination

by Inderscience Publishers  (Dec. 3, 2010)

Vapour Absorption Heat Transformers (VAHT) have shown good potential for upgrading waste heat to useful temperature levels. VAHT can be effectively coupled with Multi Effect Desalination (MED) systems for water purification. In this study an exergetic analysis is carried out for VAHT integrated with MED. A simulation model has been developed to ...

Heat recovery and energy efficiency, improves profitability and reduces CO footprint

by Oilon Oy  (Feb. 7, 2012)

Using latest technology in combustion of oil and gas can provide significant savings in overall energy consumption. Modern oxygen control that compensates changes in ambient temperature and fuel qualities can increase energy efficiency up to 3%. By adding the usage of hot combustion air another 2-3% can be saved. Modern burner technology without ...

Combined heat & power is a clean, efficient and economic energy solution

by Shenton Group  (Oct. 12, 2011)

The 21st century has highlighted a need for clean, efficient and economic energy, which has put Combined Heat & Power (CHP) into the limelight. By providing on-site power generation, waste heat recovery and system integration, CHP offers a realistic, near-term solution for exceptional energy efficiency and emission reduction. CHP systems can ...

Coupled Heat and Moisture Flow in Unsaturated Swelling Clay Barriers

by ASTM International  (Jun. 1, 1996)

The main thermodynamic forces active in the near field of a nuclear fuel waste multiple barrier system during the unsaturated stage are the gradients of temperature, fluid pressure, and chemical potentials. The processes that have a direct impact on the transport mechanism of heat and moisture within the clay-based compacted buffer material are ...

Reduction of ammonia emissions during composting by Uncoupling of oxygen demand and heat removal

by ORBIT e.V.  (Jan. 2, 1999)

Intensive pig production systems result in high emissions of ammonia, odour and greenhouse-gases (methane and laughing gas) by exhaust ventilation air. Moreover, large amounts of manure (faeces and urine) are produced with insufficient nearby land for applications (Imbeath, 1998). These outputs lead to environmental problems related to ...

Removal of Heat stable salts – A solution to Amine plant operational problems

by Eco-Tec Inc.  (Apr. 24, 2013)

Introduction Amine scrubbing solutions are used to remove hydrogen sulfide and carbon dioxide from gas streams in many natural gas conditioning plants and oil refineries. Two major problems represent a significant threat to an amine gas treating plant: corrosion and instability of operation, resulting in unscheduled upsets and outages. In this ...

Olive mill waste water treatment

by EVALED - Veolia Water Technologies  (Jun. 4, 2013)

The production of olive oil generates two kind of waste waters: RINSING WATERS: the quantity is subject to change. It can be re-circulated, after the settling to remove the solids, or discharged directly. SLUDGE: vegetation water with additional water, whose quantity is subject to change. In case of traditional oil mills, the hot additional ...

VacuDry Indirect heated vacuum thermal Desorption by econ industries - case study

by econ industries GmbH  (Feb. 6, 2014)

With the VacuDry8 technology the energy-efficient treatment of hazardous and industrial waste as well as contaminated soil, oil sludge and secondary raw material is realized. Controlled vacuum and heat are used to separate minerals from oil, solvents, mercury and other hazardous substances.    At the core of the econ VacuDry8 ...

Replacement of Salt Baths with Fluidised Bed Furnaces: Quality Heat Treatment

Quality Heat Treatment has developed a fluidised bed heat treatment technology which replaces the older molten salt technology. This eliminates concerns about disposal of cyanide salts and workplace safety issues that are associated with the molten salt technology. A payback period of approximately two years is expected on an average sized ...

Treating organic waste with Cambi® THP

by Cambi AS  (Jan. 2, 2008)

This paper describes how the Cambi Thermal Hydrolysis Process (THP) treats biodegradable organic waste and converts it to renewable energy and pathogen-free and bio-fertilizer. The interest for the process is expected to increase due to new environmental legislation as well as increasing demand for renewable energy. The implementation of the ...

Several waste gas streams: Highly contaminated oxygen-free waste gas, and medium waste gas stream - Case Study

by Chemisch Thermische Prozesstechnik GmbH / CTP Air Pollution Control  (Jun. 9, 2010)

Example: Chemical industry Similar tasks: Petrochemical and pharmaceutical industries A producer of synthetic rubber creates a medium waste gas as well as a highly contaminated oxygen-free waste gas which contains primarily low hydrocarbons. The main waste gas stream is purified in a regenerative thermal oxidiser (RTO), while the oxygen-free ...

Wasting energy through steam loss

by Thermal Energy International Inc.  (Jun. 21, 2011)

The European Union Directive on the Energy Performance of Buildings, which relates to all member nations of the European Union, are obliged to set limits on greenhouse gas emissions, particularly from buildings. Typically steam is used for a wide range of applications within larger establishments including, humidification, hot water, space ...

Denmark’s Near-Zero-Waste Wonder

by Ensia  (Jul. 21, 2014)

Has this Danish community found the formula for environmentally friendly industry? When we look closely at systems in nature — coral reefs or rainforests, for instance — we see something we don’t often see in human systems: mutually beneficial relationships and energy flows among the various elements, such as air, water, rocks, ...

The Plasma Processing of Steel Plant Wastes

by Tetronics (International) Ltd  (Dec. 16, 2010)

ABSTRACT: Electric arc furnace (EAF) dusts, have been successfully treated in plasma-fired carbothermic reduction furnaces to recover metal values. Although the technology is equally applicable across the range from plain carbon to stainless steels, historically, it is the latter that has been the more commercially successful. Because the plasma ...

Leveraging microgrids in waste-to-energy applications

by Waste Advantage Magazine  (Sep. 1, 2011)

What do the waste-to-energy and real estate sectors have in common? In both, location is the key factor influencing the bottom line. Although waste-to-energy conversion technologies continue to improve their efficiency, energy will always be worth more when it is in the right location. With rising energy costs and increasing concern over electric ...

Solid waste gasification pollution abatement

by Catalytic Products International (CPI)  (Jun. 9, 2011)

Catalytic Products International has partnered with a Gasification System Designer in the design and supply of a unique thermal oxidizer for use with a closed loop batch pyrolysis gasification system. The gasifier is engineered to create a clean combustible syngas from a broad spectrum of dissimilar carbonbased solids, liquids, and other ...

Treating organic waste with Cambi THP

by Cambi AS  (Dec. 18, 2009)

ABSTRACT This paper describes how the Cambi Thermal Hydrolysis Process (THP) treats biodegradable organic waste and converts it to renewable energy and pathogen-free and bio-fertilizer. The interest for the process is expected to increase due to new environmental legislation as well as increasing demand for renewable energy. The implementation of ...

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