Pre-Precipitation and the High-Rate Process for Domestic Wastewater Pretreatment in Finland — A Case Study

1990 ◽  
pp. 413-427
Author(s):  
Arvo Ilmavirta
Keyword(s):  
Domestic Wastewater ◽  
High Rate ◽  
Rate Process

scholarly journals High-rate algal pond for removal of pharmaceutical compounds from urban domestic wastewater under tropical conditions. Case study: Santiago de Cali, Colombia

2020 ◽  
Vol 82 (6) ◽  
pp. 1031-1043 ◽  
Author(s):  
Eliana M. Jiménez-Bambague ◽  
Carlos A. Madera-Parra ◽  
Aura C. Ortiz-Escobar ◽  
Paola A. Morales-Acosta ◽  
Enrique J. Peña-Salamanca ◽  
...  
Keyword(s):  
Domestic Wastewater ◽  
Pharmaceutical Compounds ◽  
Pilot Scale ◽  
High Rate ◽  
Tropical Conditions ◽  
Biodegradation Process ◽  
Inflammatory Drugs ◽  
The City ◽  
Hypolipidemic Drugs

Abstract This study evaluated the capacity of a pilot-scale high-rate algal pond (HRAP) to remove pharmaceutical compounds (PCs) from domestic wastewater in the city of Santiago de Cali, Colombia. The compounds analyzed included antiepileptics, hypolipidemic drugs, tranquilizers and analgesics, and anti-inflammatory drugs. The HRAP operated under a continuous water flow of 0.2 m3d−1 and a 3-day hydraulic retention time (HRT). Removal efficiencies were high (>70%) for fenofibric acid, ibuprofen, and paracetamol; medium (30–70%) for gabapentin, lamotrigine, fenofibrate, gemfibrozil, diclofenac, ketoprofen, naproxen, and pentoxifylline; and low (<30%) for carbamazepine and its metabolite 10,11-Dihidro-10,11-dihidroxicarbamazepine (CBZ-Diol). The findings herein are similar to other studies, but were obtained with a shorter HRT. These results show that tropical environmental conditions favor photodegradation and contribute to the development of microalgae and the biodegradation process. Twenty microalgae species were identified, with the phylum Chlorophyta as the most abundant, particularly due to its natural introduction. The removal of the PCs also reflected a percentage reduction (>50%) in the ecological hazard posed by most of the compounds, although it is important to note that the hazard from gemfibrozil and ibuprofen remained high even after treatment, indicating the need for complementary treatment.

Studies of Anaerobic Treatment of Sulfite Process Wastes

1985 ◽  
Vol 17 (1) ◽  
pp. 113-121 ◽  
Author(s):  
John F Ferguson ◽  
Mark M Benjamin
Keyword(s):  
Biological Treatment ◽  
Anaerobic Treatment ◽  
High Rate ◽  
Commercial Application ◽  
Rate Process ◽  
Laboratory Studies ◽  
Extraction Stage ◽  
Toxicity Effects

A series of laboratory studies of treatment of sulfite process wastes constitute a case study of application of high rate anaerobic biological treatment. Sulfite evaporator condensate (SEC) was evaluated in batch and continuous flow studies to find the efficiency of treatment that was possible and the conditions suitable for treatment. The role of sulfur and neutralization in the process were especially significant. Caustic extraction stage bleaching wastes (CE) were also studied for their use in neutralizing the evaporator condensate. Toxicity effects requiring dilution were found, but both CE and SEC can be treated, removing most of the BOD in a high rate process at detention times believed suitable for commercial application.

Organizational Intervention Plan For Automation Of SMEs: Case Study Gisitca

2016 ◽  
Vol 8 (01) ◽  
Author(s):  
José G. Vargas- Hernández ◽  
Ángel Daniel Rodríguez Ortega
Keyword(s):  
Job Satisfaction ◽  
Work Environment ◽  
Situational Leadership ◽  
High Rate ◽  
Satisfaction Survey ◽  
Organizational Intervention ◽  
Job Satisfaction Survey ◽  
Intervention Plan

This study has aim to identify the main causes of a bad work environment with a high rate of turnover. The objective is to propose an intervention plan to increase the participation, commitment and employees proactivity. This job is performed with a case study with the quantitative paradigm, transversal and exploratory; the selected sample is from a PYME dedicated to automation power services. For it is based on the model of situational leadership Hersey and Blanchard, in addition to job satisfaction survey NTP213.

Evaluation of flocculation and dissolved air flotation as an advanced wastewater treatment

2001 ◽  
Vol 43 (8) ◽  
pp. 83-90 ◽  
Author(s):  
A. C. Pinto Filho ◽  
C. C. Brandão
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
High Rate ◽  
Advanced Treatment ◽  
Dissolved Air Flotation ◽  
Anaerobic Reactor ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
Air Flotation ◽  
Dissolved Air

A bench scale study was carried out in order to evaluate the applicability of dissolved air flotation (DAF) as an advanced treatment for effluents from three different domestic wastewater treatment processes, namely: (i) a tertiary activated sludge plant ; (ii) an upflow sludge blanket anaerobic reactor (UASB); and (iii) a high-rate stabilization pond.

Hypermobility and Educational Outcomes: The Case of St. Louis

2016 ◽  
Vol 53 (6) ◽  
pp. 774-805 ◽  
Author(s):  
Molly W. Metzger ◽  
Patrick J. Fowler ◽  
Todd Swanstrom
Keyword(s):  
Urban Education ◽  
Public Schools ◽  
Low Income ◽  
Educational Outcomes ◽  
Urban Neighborhoods ◽  
High Rate ◽  
School Mobility ◽  
Mobility Rate ◽  
School Year

The school mobility rate in St. Louis Public Schools was 40% in 2011-2012, meaning that nearly half of students exited or entered a given school midway through the school year. This alarmingly high rate of churning across schools is accompanied by high neighborhood turnover, particularly within low-income, urban neighborhoods. This constant, disruptive change presents a serious and fundamental challenge for urban education. In this article, we summarize the literature linking mobility to educational outcomes, examine the causes of hypermobility in the case study of St. Louis, describe some of the current approaches to this challenge, and propose additional policy and program solutions.

scholarly journals ASSESSMENT OF THE PROBLEMS IN THE MANAGEMENT OF URBAN HOUSING (A CASE STUDY OF OWERRI MUNICIPALITY, IMO STATE)

2021 ◽  
pp. 441-450
Author(s):  
Nwabueze, O.p.O ◽  
Onwuka, E.O ◽  
Uzomba, N.I ◽  
Ekeh, C.U.N ◽  
Akuesi, C.U
Keyword(s):  
Urban Growth ◽  
Housing Stock ◽  
Urban Housing ◽  
High Rate ◽  
Population Increase ◽  
Residential Housing ◽  
Rapid Urbanization ◽  
Field Surveys ◽  
New Settlements

The high rate of migration, coupled with population increase triggered rapid urbanization. However, a great proportion of the population still lives in substandard and low quality houses in a deplorable unsanitary residential environment particularly in developing countries. Urban and Economic growth have brought about all typical problems associated with rapid urban development resulting in housing shortage both quantitative and qualitative, slums, illegal settlement and squatting as experienced in owerri municipality. These have resulted into many urban and housing problems within the state capital owerri. This study examined the nature of urban growth and housing problems in owerri municipality. Also it tries to examine residential housing stock, identity the nature of housing problems, government policies and programmes in other to address the problems. The pattern of growth was determined using spatial analysis, and the housing problems were identified through questionnaire and field surveys. Findings revealed that the growth of urban housing in owerri municipality increases by 1034.0 hectare which is equivalent to 38.5% which is in line with Maurice (2004). It was also discovered that over a period of time, new settlements have evolved. Also, the construction and expansion of road networks are evidences of urban growth in owerri municipality. KEYWORDS: Development, Urban growth, Housing problems, population, owerri municipality.

Durable Goods Adoption and the Consumer Discount Factor: A Case Study of the Norwegian Book Market

2021 ◽  
Author(s):  
Øystein Daljord
Keyword(s):  
Durable Goods ◽  
Demand Estimation ◽  
Discount Factor ◽  
High Rate ◽  
Future Price ◽  
Book Market ◽  
Real Rate ◽  
Exogenous Shock ◽  
Exclusion Restrictions

We exploit a change in Norway’s fixed book pricing policies to construct exclusion restrictions with which to identify consumers’ discount factor. We assume that the policy change generated an unanticipated, exogenous shock to consumers’ expectations about future price cuts. Our findings suggest that consumers are much more impatient than would be implied by the real rate of interest, challenging the standard assumed rate of discounting in the extant literature on dynamic demand estimation. The high rate of consumer impatience is consistent with laboratory studies in the behavioral economics and decision-making literatures. This paper was accepted by Matthew Shum, marketing.

Studying Desertion in the spanish Civil War

Desertion ◽  
2020 ◽  
pp. 38-48
Author(s):  
Théodore McLauchlin
Keyword(s):  
Civil War ◽  
Spanish Civil War ◽  
Civil Conflict ◽  
High Rate ◽  
Armed Group ◽  
Micro Level ◽  
The Impact ◽  
Group Characteristics

This chapter develops the account of desertion primarily in the context of the Spanish Civil War from 1936 to 1939, which clarifies the role of several variables through Spain. It looks at many different organizations on both the rebel side and the Republican side in order to examine the impact of different armed group characteristics on desertion. It uses the Spain case study to understand desertion dynamics in a particularly fascinating civil conflict. The chapter focuses on the Republican side, analyzing the dynamics of its relatively high rate of desertion at various points in the conflict. It demonstrates norms of cooperation and coercion at the micro level to statistically assess individual soldiers' decisions to fight or to flee.

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