نتایج جستجو برای: granulated and flocculated sludge
تعداد نتایج: 16832270 فیلتر نتایج به سال:
Background & Objectives: Listeria bacterium resists to the sludge digestion conditions and Listeria monocytogenes is the most important of them. Sludge produced in the north Isfahan wastewater treatment plant is stabilized by anaerobic digesters and is used for fertilizing agricultural lands after drying in the sludge drying beds. Based on the importance of the subject, the objective of this st...
This paper deals with thermal drying of wastewater sludges, whose management will become crucial in the forthcoming years. Sludges collected after mechanical dewatering in 5 different WWTPs are submitted to the same convective drying treatment in order to try finding some relations between the drying behaviours, the type of effluent and wastewater treatments. Results show dearly sludge drying r...
background: using the sludge as fertilizer on farms is one of the options to dispose it, which due to its variety of pathogenic microorganisms, it may cause a wide range of bacterial and parasitic diseases in human and livestock. the purpose of this study is to investigate the feasibility of using dried sludge produced in municipal wastewater treatment processes to fertilize agricultural lands ...
The aim of the study was to determine effect sewage sludge and composts produced from municipal waste on content various forms nitrogen in soil. field experiment carried out 2004–2015. It included three crop rotations following plants: potato, spring barley, winter oilseed rape wheat. consisted treatments: control (without fertilization), NPK, manure (FYM), compost straw (CSSS), composted (CSS)...
Background and purpose: In activated sludge process large amounts of sludge are produced. The disposal and management of this sludge remains a big challenge due to environmental, economic, social and legal factors. Thus, selecting an appropriate process that could reduce sludge would be of great help in solving this problem. The aim of present research was to determine the effects of three pr...
Land application of sewage sludge is potentially beneficial as an inexpensive nutrient source. However, problem with the use of sludge may exist from high soil concentrations and subsequent uptake of heavy metals by plant and entering of the metals into the human and animal food chains. A field study with lettuce (Lactuca sativa L.) and spinach (Spinacia oleracea L.) was conducted to examine up...
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