Retrofit injection of humid gas from sludge dryer and secondary air in WTE furnances of QuĂ©bec city
© WTERT Greece (5/2009)
This paper discusses the retrofit injection of humid gas from sludge dryer with secondary air in the WTE furnaces in QuĂ©bec City. In 1992, a municipal sludge treatment plant was added in the WTE building. Three sludge dryers, each connected to a furnace, were added. Direct contact with hot furnace gas was used to dry sludge in a rotary drum. Humid gas
from the dryer was returned to the rear wall of the furnace just above the finishing grate.
Sewage sludge disposal in Czech Republic - Situation and objectives
© Bayerisches Staatsministerium fĂĽr Umwelt und Verbraucherschutz (6/2008)
The basic legislative norm in the Czech Republic regulating all issues around sewage sludge disposal is the â€śWaste Actâ€ť accepted by the Parliament and published in the Collection of Law under registration number 185/2001 Coll. The law was amended several times and the last amendment comes from 2006 (No. 314/2006 Coll.). The latest amendment defines not only the sludge from wastewater treatment plants (i.e., not only from municipal wastewater treatment plants) but brings also a new category of â€śbiologically degradable wastesâ€ť.
Critical analysis of high moisture MSW bio-drying: the Romanian case study
© Wasteconsult International (5/2007)
Bio-drying is an aerobic pre-treatment of municipal solid waste that shows its best performances when the waste has a high moisture content. This is a typical characteristics of the waste of low-income countries. The bio-drying process exploits the exothermic reactions developed in the core of the waste thanks to a regulated aeration. The aim is
the generation of a material with a higher Lower Heating Value (LHV), using a little part
of volatile solids present in the waste.
Energy from biomass
© OTH Amberg-Weiden (8/2005)
In principle biomass is organically stored solar energy. The storage occurs through photosynthesis in plants and via the plants in animals as well. According to this definition, coal, oil and gas may also be considered as biomass; after all they originate from dead plant and animal residue. As we understand it today, biomass also has a temporal dimension. It is decisive for our climate that the growth process of biomass - while it is converting carbon, mostly from the carbon dioxide (CO2) in the air, into organic matter - closely coincides with the release, e.g. by energetic utilization. This period can last several hundred years for trees and only a few weeks for other plants.
Characterization of alternative fuels
© TK Verlag - Fachverlag fĂĽr Kreislaufwirtschaft (3/2005)
Utilization of alternative fuels in the power generating industry, in the cement industry and in the steel making industry has recently gained a considerable importance.
Clean wastewater for breweries
© DIV Deutscher Industrieverlag GmbH (8/2004)
Water and Wastewater in Russia - The technology for biological wastewater treatment in breweries meets wastewater standards and official requirements. Enviro-Chemie specialists develop a customized, ecologically and economically sound solution for each client.
Agricultural reuse of wastewater and sewage sludge
© UniversitĂ¤t Braunschweig - Institut fĂĽr Siedlungswasserwirtschaft (10/2003)
Continued population growth, contamination of both surface water and groundwater, uneven distribution of water resources and periodic droughts have lead to a search for new sources of water supply. One must discuss, not only in developing and threshold countries, how the objectives and requirements for wastewater and sludge disposal are in accord with a possible water reuse or whether they exclude each other. Early developments in the field of water reuse are synonymous with the historical practice of land application for the disposal of wastewater.