a b s t r a c tThe present study introduces a new technique using a combined up-flow anaerobic sludge bed (UASB) followed by innovative down-flow hanging non-woven fabric (DHNW) for the treatment of domestic wastewater. The aim of this work is to develop an innovative non-woven packing material that can be used to improve the performance of both UASB and DHNW and other similar techniques for the treatment of wastewater. The packing material could be produced from waste plastic bottles, thus considerable part of solid waste can be reduced, recycled and applied in wastewater treatment plant to produce treated reusable effluent. The primary treatment was carried out using packed and classical UASB reactor (in parallel manner). The quality of the packed UASB effluent was better than that of the classical UASB reactor. Consequently, the effluent of the packed UASB reactor was fed directly to the DHNW reactor. The source of wastewater was the domestic wastewater from Zeneen's wastewater treatment station. The hydraulic residence time (HRT) of the UASB reactors was 6 h. The performance of the combined packed UASB/DHNW showed reduction of COD, BOD and TSS from 349.6, 260.6 and 171.3 to 44, 24 and 27 mg/L, respectively. The fecal coliform (FC)count was reduced by 3 log units using the combined packed UASB/DHNW system. The results indicated that polyethylene terephthalate (PET) spun-bond non-woven fabric can offer a cost effective solution as well as durable and efficient packing material for wastewater treatment.
Increasing consumption of oil in modern society has led to more oil refinery waste generation. The wastewater from these industries mainly contains oil, organic matter, and other compounds that need to be well managed before they can be discharged to any receiving waters. The treatment of this wastewater can be carried out by physical, biological, and chemical treatment processes. Treatment of petroleum wastewater has two stages, firstly, the pre-treatment stage reduces grease, oil, and suspended materials. Secondly, an advanced treatment stage is to degrade and decrease the pollutants to acceptable discharge values. The current review summarizes studies and investigations carried out for the treatment of petroleum industries and refineries.
The critical situation about water resources in Egypt forces the state to increase its uses from non-conventional water resources (reuse of wastewater and desalination). Wastewater reuse represent a potential source for a round 8 Billion Cubic Meters (BCM) /year. The micropollutant and the sophisticated specification hinder the usage of wastewater. Advanced oxidation process represents a new potential way for improving the effluent of Waste Water Treatment Plants (WWTPs). In this work the discharge of three WWTPs (Arab-Abosaaed station located in Helwan-Cairo, El-Berka station located in El-Salam city-Cairo and Balaqs station located in Shubra El-Kheima-Cairo) were investigated and treated. The investigation illustrated that El Berka WWTP is the most vulnerable WWTP this why its effluent was used to conduct further treatment on it. The three WWTPs are appropriate for use according to Egyptian law 48/1982 and the uses quality for treated wastewater are fitted with Class D and Class C Code 501/2015 specification. Effluent from the three-treatment plant is unsuitable for uses according to Class A and B. Hydrogen peroxide, Fenton, and photo-Fenton were used as advanced oxidants to improve the effluent quality. All the oxidants used has been successfully implemented to achieve 100% WWQI for different reuse purposes. However, the cost benefit of using hydrogen
Objectives: to study the relation between atrial fibrillation (AF) and in-hospital outcome in patients with acute coronary syndrome (ACS) who were treated by primary percutaneous coronary intervention (PCI). Methods: This study was conducted on 80 patients admitted with ACS and treated with primary PCI at cardiovascular medicine department Tanta university hospitals starting from January 2020 till January 2021. The primary end points are all cause mortality and major adverse cardiovascular events (MACE) including a composite of death, nonfatal re-infarction, target vessel revascularization (TVR), new onset congestive heart failure, contrast induced nephropathy (CIN), or stroke during hospitalization. Patients was divided into 2 groups: Group 1: consisted of 40 consecutive AF-patients treated by primary PCI. Group 2: consisted of 40 consecutive sinus rhythm-patients treated by primary PCI. Results: Patients in AF group showed significantly older age, lower systolic and diastolic blood pressure, higher heart rate, higher Killip class II-IV, more inferior STEMI presentation, higher CK-MB, more RCA as infarction related artery, more moderate to sever mitral regurgitation, more patient developed congestive heart failure during hospitalization, and higher overall MACE during hospitalization. Univariate and multivariate regression analysis were performed to investigate the possible predictors of AF in the study population. In univariate regression analysis, older age, higher CKMB level, higher degree of mitral regurgitation, enlarged left atrium, and RCA as infarction related artery were correlated with AF. In the multivariate regression analysis, using model adjusted for aforementioned parameters, older age, higher CK-MB level, enlarged left atrium diameter, and RCA as infarction related artery independently predicted AF. Univariate and multivariate regression analyses were performed to investigate the possible predictors of overall in-hospital MACE in the study population. In univariate regression analysis, smoking, Killip II-IV, high creatinine level, lower ejection fraction, higher end systolic diameter, and AF were correlated with MACE. In the multivariate regression analysis, using model adjusted for aforementioned parameters, Killip II-IV, higher creatinine level, and AF independently predicted MACE. Conclusion: Patients older in age, with higher CK-MB level, enlarged left atrial diameter, and RCA as infarction related artery had higher incidence of AF during ACS. Patient with AF who presented with ACS had a higher incidence of heart failure during hospitalization. The independent predictors of MACE in our study were AF, Killip II-IV, and higher creatinine level.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.