a short review of comparative energy economic and environmental assessment of different biogas based power generation technologies

Abstract Biogas can be utilized as a source of heat or power in single generation, cogeneration and multi-generation systems for production of useful commodities as power, heat or chemicals like hydrogen and methane. Different technologies can be employed for converting biogas as an energy carrier into final products. Besides, some strategies can be made for recovering the heat after the power generation processes for different purposes such as heating, cooling or even production of hydrogen or fresh water. Gas engines, gas turbines and solid oxide fuel cells (SOFCs) are the common technologies for power generation from biogas. This study investigates the novel biogas-based energy systems and assesses their energetic performance via efficiency evaluation as well as their environmental and economic performances

Waste management in USA through case studies: e-waste recycling and waste energy plant.

USA has improved waste management system than many other countries, namely India, China, Middle East countries and South Africa. In 2012, Americans generated about 251 million tons of trash. It recycled and composted almost 87 million tons, equivalent to a 34.5 % recycling rate. US recycled and composted nearly 0.69 kg out of the individual waste generation rate of 1.98 kg per person per day. Whereas, in 2012, 3.412 million tons of e-waste was generated in the U.S, nearly 30% is recycled and 70% is trashed. The paper presents the status of the WTE and WEEE recycling plants in the US and analyse their sustainability through two case studies at 20 tpd e-waste recycling plant at 48th Street Transfer Station and the 80 MW Covanta waste to energy plant in Philadelphia, USA based on the study visit in 30th ICSW 2015. The transportation of the MSW feedstock to wte plant is done by the railway wagon with a robust supply chain. The e-waste recycling plant dismantles the materials in semiautomatic conveyor & crusher, segregates and packs both manually and with electronic eye. Plastics, metal, glass and the equipment for reuse are segregated here. The plant sends this material to materials recycling plants. Both the plant has different business case. The study will be helpful for the researchers and the stakeholder in different countries

International Nosocomial Infection Control Consortium report, data summary of 50 countries for 2010-2015: Device-associated module

•We report INICC device-associated module data of 50 countries from 2010-2015.•We collected prospective data from 861,284 patients in 703 ICUs for 3,506,562 days.•DA-HAI rates and bacterial resistance were higher in the INICC ICUs than in CDC-NHSN's.•Device utilization ratio in the INICC ICUs was similar to CDC-NHSN's. Background: We report the results of International Nosocomial Infection Control Consortium (INICC) surveillance study from January 2010-December 2015 in 703 intensive care units (ICUs) in Latin America, Europe, Eastern Mediterranean, Southeast Asia, and Western Pacific. Methods: During the 6-year study period, using Centers for Disease Control and Prevention National Healthcare Safety Network (CDC-NHSN) definitions for device-associated health care-associated infection (DA-HAI), we collected prospective data from 861,284 patients hospitalized in INICC hospital ICUs for an aggregate of 3,506,562 days. Results: Although device use in INICC ICUs was similar to that reported from CDC-NHSN ICUs, DA-HAI rates were higher in the INICC ICUs: in the INICC medical-surgical ICUs, the pooled rate of central line-associated bloodstream infection, 4.1 per 1,000 central line-days, was nearly 5-fold higher than the 0.8 per 1,000 central line-days reported from comparable US ICUs, the overall rate of ventilator-associated pneumonia was also higher, 13.1 versus 0.9 per 1,000 ventilator-days, as was the rate of catheter-associated urinary tract infection, 5.07 versus 1.7 per 1,000 catheter-days. From blood cultures samples, frequencies of resistance of Pseudomonas isolates to amikacin (29.87% vs 10%) and to imipenem (44.3% vs 26.1%), and of Klebsiella pneumoniae isolates to ceftazidime (73.2% vs 28.8%) and to imipenem (43.27% vs 12.8%) were also higher in the INICC ICUs compared with CDC-NHSN ICUs. Conclusions: Although DA-HAIs in INICC ICU patients continue to be higher than the rates reported in CDC-NSHN ICUs representing the developed world, we have observed a significant trend toward the reduction of DA-HAI rates in INICC ICUs as shown in each international report. It is INICC's main goal to continue facilitating education, training, and basic and cost-effective tools and resources, such as standardized forms and an online platform, to tackle this problem effectively and systematically