Two-Stage Thermal oxidization: A Cost-Effective, Environmentally Sound Alternative for BioEnergy Recovery from Multiple Hearth Furnaces

2017 ◽  
Vol 2017 (8) ◽  
pp. 3907-3917
Author(s):  
Stanley J Chilson ◽  
William Karch
Keyword(s):  
Cost Effective ◽  
Two Stage ◽  
Environmentally Sound

Two-stage chemical-biological treatment at Thessaloniki greater area WWTP - experiences and potentials

1995 ◽  
Vol 32 (9-10) ◽  
pp. 75-84 ◽  
Author(s):  
A. D. Andreadakis ◽  
G. H. Kristensen ◽  
A. Papadopoulos ◽  
C. Oikonomopoulos
Keyword(s):  
Biological Treatment ◽  
Treatment Plant ◽  
Cost Effective ◽  
Primary Treatment ◽  
Effective Control ◽  
Two Stage ◽  
Effluent Quality ◽  
Filamentous Microorganisms ◽  
Sludge Settling ◽  
The City

The wastewater from the city of Thessaloniki is discharged without treatment to the nearby inner part of the Thessaloniki Gulf. The existing, since 1989, treatment plant offers only primary treatment and did not operate since the expected effluent quality is not suitable for safe disposal to the available recipients. Upgrading of the plant for advanced biological treatment, including seasonal nitrogen removal, is due from 1995. In the mean time, after minor modifications completed in February 1992, the existing plant was put into operation as a two-stage chemical-biological treatment plant for 40 000 m3 d−1, which corresponds to about 35% of the total sewage flow. The operational results obtained during the two years operation period are presented and evaluated. All sewage and sludge treatment units of the plant perform better than expected, with the exception of the poor sludge settling characteristics, due to severe and persistent bulking caused by excessive growth of filamentous microorganisms, particularly M. Parvicella. Effective control of the bulking problem could lead to more cost-effective operation and increased influent flows.

scholarly journals A two-stage amplified PZT sensor for monitoring lung and heart sounds in discharged pneumonia patients

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Hongbin Chen ◽  
Shuai Yu ◽  
Haiyang Liu ◽  
Jie Liu ◽  
Yongguang Xiao ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Cost Effective ◽  
High Ratio ◽  
Heart Sounds ◽  
Two Stage ◽  
Diagnosis And Prognosis ◽  
Sensor Device ◽  
Cost Effective Alternative ◽  
A Charge ◽  
Highly Sensitive Detection

AbstractAssessment of lung and heart states is of critical importance for patients with pneumonia. In this study, we present a small-sized and ultrasensitive accelerometer for continuous monitoring of lung and heart sounds to evaluate the lung and heart states of patients. Based on two-stage amplification, which consists of an asymmetric gapped cantilever and a charge amplifier, our accelerometer exhibited an extremely high ratio of sensitivity to noise compared with conventional structures. Our sensor achieves a high sensitivity of 9.2 V/g at frequencies less than 1000 Hz, making it suitable to use to monitor weak physiological signals, including heart and lung sounds. For the first time, lung injury, heart injury, and both lung and heart injuries in discharged pneumonia patients were revealed by our sensor device. Our sound sensor also successfully tracked the recovery course of the discharged pneumonia patients. Over time, the lung and heart states of the patients gradually improved after discharge. Our observations were in good agreement with clinical reports. Compared with conventional medical instruments, our sensor device provides rapid and highly sensitive detection of lung and heart sounds, which greatly helps in the evaluation of lung and heart states of pneumonia patients. This sensor provides a cost-effective alternative approach to the diagnosis and prognosis of pneumonia and has the potential for clinical and home-use health monitoring.

Development of a two-stage flexible fibre biofilm reactor for treatment of food processing wastewater

2003 ◽  
Vol 47 (11) ◽  
pp. 189-194 ◽  
Author(s):  
Q.J. Yu ◽  
H. Xu ◽  
D. Yao ◽  
P. Williams
Keyword(s):  
Removal Efficiency ◽  
Food Processing ◽  
Cost Effective ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Two Stage ◽  
Cod Removal Efficiency ◽  
Cost Effective Treatment ◽  
Removal Efficiencies ◽  
Food Processing Wastewater

Biofilm (or attached growth) reactors can be effectively used to treat organic wastewater from various industries such as food processing industry. They have a number of advantages including high organic loading rates (OLRs) and improved operational stability. A flexible fibre biofim reactor (FFBR) has been developed for efficient and cost effective treatment of food processing wastewater. In the process, simple flexible fibre packing with a very high specific surface area is used as support for microorganisms. The COD removal efficiencies for a range of OLRs have been studied. The FFBR can support an increasingly high OLR, but with a corresponding decrease in the COD removal efficiency. Therefore, a two-stage FFBR was developed to increase the treatment efficiency for systems with high OLRs. Experimental results indicated that a high overall COD removal efficiency could be achieved. At an influent COD of about 2700 mg/L and an OLR of 7.7 kgCOD/m3d, COD removal efficiencies of 76% and 82% were achieved in the first and the second stage of the reactor, respectively. The overall COD removal efficiency was 96%. Therefore, even for wastewater samples with high organic strength, high quality treated effluents could be readily achieved by the use of multiple stage FFBRs.

scholarly journals One-stage tubeless antegrade ureteric stenting: a safe and cost-effective option?

2010 ◽  
Vol 92 (3) ◽  
pp. 218-224 ◽  
Author(s):  
Sudhanshu Chitale ◽  
Vaiyapuri Raja ◽  
Nabeel Hussain ◽  
Janak Saada ◽  
Simon Girling ◽  
...  
Keyword(s):  
Cost Effective ◽  
Radiology Department ◽  
Complication Rates ◽  
Two Stage ◽  
Ureteric Stent ◽  
One Stage ◽  
Ureteric Stenting ◽  
Effective Option ◽  
Retrospective Data Collection ◽  
Procedural Costs

INTRODUCTION Antegrade insertion of ureteric stent has become an established mode of management of upper tract obstruction secondary to ureteric pathology. It is conventionally performed as a two-stage procedure for various reasons but, more recently, a one-stage approach has been adopted. PATIENTS AND METHODS We discuss our experience of primary one-stage insertion of antegrade ureteric stent as a safe and cost-effective option for the management of these difficult cases in this retrospective observational case cohort study of patients referred to a radiology department for decompression of obstructed upper tracts. Data were retrieved from case notes and a radiology database for patients undergoing one-stage and two-stage antegrade stenting. It was followed by telephone survey of regional centres about the prevalent local practice for antegrade stenting. Outcome measures like hospital stay, procedural costs, requirement of analgesia/antimicrobials and complication rates were compared for the two approaches. RESULTS a one-stage approach was found to be suitable in most cases with many advantages over the two-stage approach with comparable or better outcomes at lower costs. Some of the limitations of the study were retrospective data collection, more than one radiologist performing stenting procedures and non-availability of interventional radiologist falsely raising the incidence of two-stage procedures. CONCLUSIONS In the absence of any clinical contra-indications and subject to availability of an interventional radiologist’s support, one-stage antegrade stenting could easily be adopted as a routine approach for the management of benign or malignant ureteric obstruction.

scholarly journals A Risk-Based Interval Two-Stage Programming Model for Agricultural System Management under Uncertainty

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Ye Xu ◽  
Guohe Huang
Keyword(s):  
Agricultural Production ◽  
Financial Risk ◽  
Production Management ◽  
Programming Model ◽  
Cost Effective ◽  
Critical Issue ◽  
Agricultural System ◽  
Two Stage ◽  
Production Pattern ◽  
System Benefit

Nonpoint source (NPS) pollution caused by agricultural activities is main reason that water quality in watershed becomes worse, even leading to deterioration. Moreover, pollution control is accompanied with revenue’s fall for agricultural system. How to design and generate a cost-effective and environmentally friendly agricultural production pattern is a critical issue for local managers. In this study, a risk-based interval two-stage programming model (RBITSP) was developed. Compared to general ITSP model, significant contribution made by RBITSP model was that it emphasized importance of financial risk under various probabilistic levels, rather than only being concentrated on expected economic benefit, where risk is expressed as the probability of not meeting target profit under each individual scenario realization. This way effectively avoided solutions’ inaccuracy caused by traditional expected objective function and generated a variety of solutions through adjusting weight coefficients, which reflected trade-off between system economy and reliability. A case study of agricultural production management with the Tai Lake watershed was used to demonstrate superiority of proposed model. Obtained results could be a base for designing land-structure adjustment patterns and farmland retirement schemes and realizing balance of system benefit, system-failure risk, and water-body protection.

Valorization of food waste for cost-effective reducing sugar recovery in a two-stage enzymatic hydrolysis platform

Energy ◽  
2020 ◽  
Vol 208 ◽  
pp. 118379
Author(s):  
Cunsheng Zhang ◽  
Xinxin Kang ◽  
Fenghuan Wang ◽  
Yufei Tian ◽  
Tao Liu ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Food Waste ◽  
Cost Effective ◽  
Reducing Sugar ◽  
Sugar Recovery ◽  
Two Stage

Preparing a framework for two-stage target-cost arrangement formulation

2016 ◽  
Vol 9 (1) ◽  
pp. 123-146 ◽  
Author(s):  
Pertti Lahdenperä
Keyword(s):  
Service Provider ◽  
Development Process ◽  
Cost Effective ◽  
Two Stage ◽  
Content Type ◽  
Investment Projects ◽  
Second Stage ◽  
Target Cost ◽  
The Cost ◽  
Concrete Model

Purpose – Early involvement of the project team with the construction resources seems to be gaining popularity as it aims to improve the cost efficiency of a project as there is significantly more potential to influence the project solution at that point in time. The missing price during early involvement/selection and the principal-agent setting, however, tend to leave the project owner in doubt of the reasonableness of pricing when it is fixed only later after the joint design phase involving the service provider and the owner. The purpose of this paper is to find a solution for this challenge. Design/methodology/approach – A two-stage target-cost (2STC) arrangement has been proposed as the solution. In this model the service provider earns a bonus by suggesting a lower target cost than the reference set at the time of the involvement of the provider. The amount of bonus also impacts the cost over-run risk transferred to the service provider to avoid overly optimistic promises. The proposition encompassed just the basic idea, and did not really delve into actual model formulations and their functioning under practical realities. Therefore, the required work is presented here in the form of a conceptual, discursive study focusing on relevant theories and empirical findings from major investment projects. Findings – The study produces a requirement framework for the 2STC model to allow functioning models to be formulated and tested. The framework incorporates numerous requirements, constraints and a suggested path forward. For instance, while the model may not be manipulatable, it must incentivise the service provider to seek more cost-effective project solutions, be feasible also from the view of the project owner and adapt to various project risk profiles and ranges of efficiency improvements. Research limitations/implications – The study suggests more concrete model formulations to be provided under the guidance of the presented framework. Originality/value – The 2STC model is a unique concept and no comparable construct is known to exist. Besides the requirement framework, the study also strengthens the foundation of and need for the 2STC model by a thorough survey of its theoretical linkages. Accordingly, the study presented in this paper forms the second stage in the overall 2STC development process focused on benefiting project owners and the industry.

scholarly journals Early Experiences with Indigenous Medicated Spacers in the Management of Infected Hip Prosthesis.

2013 ◽  
Vol 11 (1) ◽  
pp. 32-36
Author(s):  
Pankaj Chand ◽  
Suchil Rana Magar ◽  
Bishnu Babu Thapa ◽  
Bachhu Ram KC ◽  
Amit Joshi ◽  
...  
Keyword(s):  
Hip Prosthesis ◽  
Revision Arthroplasty ◽  
Recurrent Infection ◽  
Cost Effective ◽  
Deep Infection ◽  
Two Stage ◽  
Joint Replacement Surgery ◽  
Replacement Surgery ◽  
Walking Capacity ◽  
Postoperative Dislocation

Introduction: Joint replacement surgery, has become one of the most frequent prosthetic surgeries over the past decades due to its success in restoring function to disabled arthritic individual. A two-stage revision arthroplasty is a well-accepted method for the treatment of a deep infection of a hip with a joint implant. In the present study, the results of three infected hips with the interim use of an indigenous cemented prosthesis along with gentamycin impregnated cement beads were assessed with a two stage revision. Methods: Three consecutive patients who were managed with a two-stage revision hip arthroplasty for the treatment of a previous infection, with retained implants, were followed clinically and radiographically for an average of 15 months. Following removal of implants and debridement (first stage), an indigenous medicated prosthesis along with antibiotic coated cement beads were implanted, for an interim phase of six - eight weeks aft er which a new prosthesis was placed ( second stage ).In this period antibiotics ( both intravenous and oral) were administered to the patients. Results: In a mean follow up period of 15 months, there is no evidence of recurrent infection in all three patients, as of now. The use of antibiotic coated cement prosthesis along with gentamycin mixed cement beads was associated with a satisfactory hip score, and better walking capacity in the interim period, a lower transfusion requirement at the time of reimplantation, and no postoperative dislocation. Conclusions: Locally prepared medicated spacer and gentamycin coated beads help in eradicating hip infection, besides being more cost effective. Medical Journal of Shree Birendra Hospital; Jan-June 2012/vol.11/Issue1/32-36 DOI: http://dx.doi.org/10.3126/mjsbh.v11i1.7765

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