نتایج جستجو برای: nutrient removal efficiency
تعداد نتایج: 580997 فیلتر نتایج به سال:
BACKGROUND In Iran, re-refinery industry has been developed many years ago based on the acid-clay treatment. Acidic sludge with high concentration of total petroleum hydrocarbon (TPH) is the final products of some facilities. In this study removal of TPH by aerated in-vessel composting was investigated. METHODS In order to microorganisms seeding and nutrient providing, urban immature compost ...
Batch electrocoagulation (BEC), continuous (CEC), and chemical precipitation (CP) were compared in struvite (MgNH4PO4·6H2O) from synthetic authentic water. In water treatment (SWT), yield was BEC 1.72, CEC 0.61, CP 1.54 kg/m3. Corresponding values (AWT) 2.55, 3.04, 2.47 SWT, 1 kg costs BEC, CEC, 0.55, 0.11 €, respectively, for AWT 0.35, 0.22 0.07 €. Phosphate removal SWT 93.6, 74.5, 71.6% CP, t...
Objective: To assess the performance of SBR to treat three different types of wastewater from domestic, hospital, slaughterhouse and investigate the kinetic rates of active biomass. Mass balance calculation of COD, TKN and TP was further performed to explain the mechanisms of the biological nutrient removals processed in the SBR system. The measured kinetic rates were in turn used to evaluate t...
Estimating balanced nutrient requirements for soybean (Glycine max [L.] Merr) in China is essential for identifying optimal fertilizer application regimes to increase soybean yield and nutrient use efficiency. We collected datasets from field experiments in major soybean planting regions of China between 2001 and 2015 to assess the relationship between soybean seed yield and nutrient uptake, an...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
Efficiency of yeast transformation is determined by the rate of yeast endocytosis. The aim of this study was to investigate the effect of introducing amino acids and other nutrients (inositol, adenine, or p-aminobenzoic acid) in the transformation medium to develop a highly efficient yeast transformation protocol. The target of rapamycin complex 1 (TORC1) kinase signalling complex influences th...
The purpose of this research was develop a biological nutrient removal (BNR) system which has low energy consumption, sludge production, and land usage. These indicate that BNR system could be a alternative of future wastewater treatment in ubiquitous city(U-city). Organics and nitrogen compounds could be removed by this system so that secondary or tertiary stages of wastewater treatment satisf...
The objectives of this study were 1) to compare Sonoran Desert streams with other streams in terms of retention efficiency of nitrate; 2) to examine the effects of a flood on nitrate retention and to determine which factors control nitrate retention in the surface stream subsystem in Sycamore Creek, Arizona; and 3) to compare the short-term nutrient addition technique with computations based up...
Removal of nutrients and pathogens in wastewater effluents is very important for the sustainability of the aquatic ecosystem and environment. On-site sewage treatment and disposal systems commonly referred as septic systems are one of the major sources of nutrients and pathogens in groundwater systems. Drainfields in septic tank systems are normally located in permeable, unsaturated natural soi...
Background and Objective: In recent years, wastewater textile treatment is of special importance due to the potential toxicity,cancer activity, and mutagens. The purpose of this study was evaluation of the removal of Remazol Black B (RBB) dyes from aqueous solution by chitosan. Materials and Methods: This laboratory study carried out on synthetic wastewater to assess the effect of factors su...
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