S134-41_mahidol 20.pmd
نویسنده
چکیده
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 the process performances under different types of wastewater. Material and Method: Experimental research involving 3 similar SBR lab-scales were installed and operated at the Sanitary Engineering Laboratory. The reactors were seeded with sludge biomass obtained from the Sri-Phraya Domestic Wastewater Treatment Plant in Bangkok. The slaughterhouse, hospital and domestic wastewaters were treated by SBR system for biological organic carbon (COD), nitrogen (TKN) and phosphorus removals. Biological methods for kinetic rates evaluation were conducted in five replicated batch tests. Results: The removal efficiencies of COD and TKN were greater than 90% for all three types of wastewater while the biological phosphorus removal for domestic and hospital wastewaters were less than 60% and phosphorus removal for slaughterhouse exceeded 95%. The kinetic rates of nitrification and denitrification of hospital wastewater was lower than those the domestic and slaughterhouse wastewaters. Phosphorus release and uptake rates of slaughterhouse wastewater were high but domestic and hospital wastewaters were very low. Conclusion: The result of system removal efficiency and batch test for kinetic rates confirmed that the domestic and hospital wastewaters were in deficiency of organic carbon with respect to its ability to support successful biological phosphorus removal.
منابع مشابه
Longitudinal Data and SAS>: A Programmer's Guide
Read more and get great! That's what the book enPDFd longitudinal data and sas a programmers guide will give for every reader to read this book. This is an on-line book provided in this website. Even this book becomes a choice of someone to read, many in the world also loves it so much. As what we talk, when you read more every page of this longitudinal data and sas a programmers guide, what yo...
متن کاملPackage for fiber Bragg gratings (FBG) and a comparative study on their polarization mode dispersion (PMD) at varying temperature
A temperature-compensated material of fiber Bragg grating (FBG), which has negative thermal -expansion coefficient has been presented. The temperature coefficient of FBGs’ center wavelength is less than 0.0005 nm/°C after three-layer-structure temperature-compensated package under tension. For the first time, PMD of FBG with and without temperature compensation has been detailedly studied and m...
متن کاملAnalysis of the ellipticity induced PMD and general scaling perturbation in a transmitting fiber
X iv :p hy si cs /0 20 40 51 v1 [ ph ys ic s. op tic s] 1 7 A pr 2 00 2 Analysis of the ellipticity induced PMD and general scaling perturbation in a transmitting fiber. Maksim Skorobogatiy, Mihai Ibanescu, Steven Johnson, Ori Weisberg, Torkel Engeness, Steven Jacobs, Yoel Fink OmniGuide Communications, One Kendall Square, Build. 100, Cambridge, MA 02139, USA. [email protected] Abstract: Pr...
متن کاملکنترل همزمان شتاب و تغییرمکان لرزه ای سازه های نامتقارن چند طبقه با استفاده از میراگرهای جرمی غیر فعال (PMD)
مطالعات اخیر نشان داده که میراگر جرمی غیرفعال می تواند پاسخ تغییرمکان حداکثر سازه های نامتقارن رابه طور مناسبی کاهش دهد. ولی در اکثر سازه ها کاهش همزمان شتاب و تغییرمکان دو لبه از اهمیت بالاییبرخوردار است. در این مقاله کنترل لرزه ای ساختمانهای نامتقارن یک، چهار و هشت طبقه با خصوصیاتمختلف پیچشی با استفاده از میراگر جرمی با مشخصات و موقعیتهای مختلف مورد مطاله قرار گرفت. کاهشحداکثر تغییرمکان و شتا...
متن کاملRight-shift for non-speech motor processing in adults who stutter.
INTRODUCTION In adults who do not stutter (AWNS), the control of hand movement timing is assumed to be lateralized to the left dorsolateral premotor cortex (PMd). In adults who stutter (AWS), the network of speech motor control is abnormally shifted to the right hemisphere. Motor impairments in AWS are not restricted to speech, but extend to non-speech orofacial and finger movements. We here in...
متن کامل