scholarly journals From anaerobic to aerobic treatment: upcycling of digestate as a moisturizing agent for in-vessel composting process

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Nour El Houda Chaher ◽  
Safwat Hemidat ◽  
Mehrez Chakchouk ◽  
Abdallah Nassour ◽  
Moktar Hamdi ◽  
...  
Keyword(s):  
Food Waste ◽  
Rural Areas ◽  
Waste Treatment ◽  
C:N Ratio ◽  
Point Of View ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Physico Chemical ◽  
Nitrification Index ◽  
Urban And Rural Areas

AbstractIn Tunisia, there are crucial challenges facing both urban and rural areas, the most prominent of which are the production of organic waste, the need for waste treatment, the demand for water and energy and the need for a circular economy. To this end, the study was designed to develop a technical concept on closed cycle ‘biowaste to bioenergy’ treating, basically food waste (FW) through combined biological processes. In this approach, the generated digestate from FW anaerobic reactors was used successfully as a moisturizing agent for FW in-vessel composting. Four types of digestate were examined to be used as moisturizing agent (MA). The selection of the appropriate MA was achieved based on technical criteria; moisture content (MC), C:N ratio and heavy metals concentrations. The findings showed that the digestate obtained from anaerobic co-digestion of food waste and wheat straw (D1) was the most efficient AD-effluent to be added. In terms of composting process performance, the thermophilic phase of the amended reactor (A1) lasted 16 days and reached higher temperatures of about 72 °C, while the unamended one (A1) was characterized by a thermophilic temperature of around 66 °C indicating that the end products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C:N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end product.

scholarly journals From Anaerobic to Aerobic Treatment: Upcycling of Digestate as a Moisturizing Agent for in-vessel Composting Process

2020 ◽  
Author(s):  
Nour El houda Chaher ◽  
Safwat Hemidat ◽  
Mehrez Chakchouk ◽  
Abdallah Nassour ◽  
Moktar Hamdi ◽  
...  
Keyword(s):  
Food Waste ◽  
Rural Areas ◽  
Waste Treatment ◽  
Point Of View ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Nitrification Index ◽  
Urban And Rural Areas

Abstract In Tunisia, there are crucial challenges facing both urban and rural areas, the most prominent of which are the production of organic waste, the need for waste treatment, the demand for water and energy and the need for a circular economy. To this end, the study was designed to develop a technical concept on closed cycle ‘biowaste to bioenergy’ treating, basically food waste (FW) through combined biological processes. In this approach, the generated digestate from FW anaerobic reactors was used successfully as a moisturizing agent for FW in vessel-composting. Four types of digestate were examined to be used as moisturizing agent (MA). The selection of the appropriate MA was achieved based on technical criteria ; moisture content (MC), C : N ratio and heavy metals concentrations. The findings showed that the digestate obtained from anaerobic co-digestion of food waste and wheat straw (D1) was the most efficient AD-effluent to be added. In terms of composting process performance, the thermophilic phase of the amended reactor (A1) lasted 16 days and reached higher temperatures of about 72°C, while the unamended one (A1) was characterized by a thermophilic temperature of around 66°C indicating that the end-products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C : N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end-product.

scholarly journals Upgrading of Food Waste in-vessel Composting Process: Effects of Biochar-rich Digestate Addition

2020 ◽  
Author(s):  
Nour El houda Chaher ◽  
Abdallah Nassour ◽  
Michael Nelles ◽  
Moktar Hamdi
Keyword(s):  
Moisture Content ◽  
Food Waste ◽  
Solid Waste Management ◽  
Point Of View ◽  
The Other ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Other Hand ◽  
Process Effects ◽  
Nitrification Index

Abstract Nowadays, Tunisia faces challenging environmental and energic issues which concern mainly the implementation of an appropriate solid waste management system dealing with the high production of biowaste in one hand and the increased need for water and energy resources in the other hand. Therefore, the current study intended to develop a technical concept on closed cycle ‘biowaste to bioenergy’, treating mainly food waste (FW) through combined biological processes. In this approach, FW anaerobic digestion (AD) residue was destined to feed FW in vessel-composting as a valuable input material. To this end, the produced digestates from amended and unamended anaerobic reactors were entirely examined to select later the most appropriate AD-effluent. Therefore, the identification of the convenient digestate was achieved based on technical criteria ; moisture content (MC), C : N ratio and heavy metals concentrations. The findings showed that the digestate obtained from different digesters was characterized by a high moisture content which inspired its utilization as an unconventional moisturizing agent (MA) reducing the fresh water consumption during the composting process. Because of the high C : N ratio, relatively significant rate of the needed macro and micro-nutrients, the exploitation of biochar-rich digestate was recomended to be used as an unconventional MA in one hand and an aerobic co-substrate booster in the other hand. Results showed that D3 addition promoted the composting process performance comparing to the blank test (A1). Indeed, the thermophilic phase of the amended reactor (A2) lasted 15 days and reached higher temperatures of about 67 °C, while the unamended one (A1) was characterized by a thermophilic temperature of around 63 °C indicating that the end-products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C : N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end-product.

Ecological Waste Treatment and Utilization Systems on Low-Cost, Energy-Saving/Generating and Resources Recoverable Technology for Water Pollution Control in China

1991 ◽  
Vol 24 (5) ◽  
pp. 9-19 ◽  
Author(s):  
Baozhen Wang
Keyword(s):  
Pollution Control ◽  
Rural Areas ◽  
Waste Treatment ◽  
Low Cost ◽  
Fish Ponds ◽  
Receiving Waters ◽  
Recoverable Resources ◽  
Urban And Rural Areas ◽  
Rice Fish ◽  
Utilization Of Wastes

Various ecological waste treatment and utilization systems (EWTUS) available in urban and rural areas in China are described, among which are land treatment and utilization systems (LTUS), eco-pond systems mainly consisting of macrohydrophytes-growing ponds, fish ponds and duck/geese ponds, and comprehensive circulation eco–systems for the treatment and utilization of wastes in rural areas, such as semi–closed eco–system in fish ponds, “rice–fish” and “rice–azolla–fish” symbiotic systems, recycling eco–systems with methane-generating digesters as central link, and comprehensive recycling eco–systems with digesters and eco–ponds as central link. In the various EWTUS, the sewage and wastewaters and other wastes are utilized and converted into various forms of recoverable resources and/or energy, while they are being purified to good quality effluents, meeting their respective discharge standards, and hence acceptable to receiving waters.

scholarly journals Studies on Some Physico-Chemical and Microbiological Characteristics of Potable Water Used in Some Rural Areas of Surat District (Gujarat)

2005 ◽  
Vol 2 (2) ◽  
pp. 113-120
Author(s):  
S. R. Patel ◽  
K. K. Desai
Keyword(s):  
Rural Areas ◽  
Potable Water ◽  
Anaerobic Bacteria ◽  
Treatment Plant ◽  
Point Of View ◽  
Total Alkalinity ◽  
Seasonal Effects ◽  
Total Hardness ◽  
Microbiological Study ◽  
Physico Chemical

A physico chemical and microbiological study of the ground water of some villages of Surat district of Gujarat state (India) has been made. Physico chemical parameters such as colour, odour, taste, temperature, pH, electrical conductivity, TS, TDS, total hardness, total alkalinity, calcium, magnesium, iron, sodium, potassium, chloride, sulphate, nitrate, fluoride and silica were determined. In microbiological study, total coliforms, E. coli, sulfate reducing anaerobic bacteria, pseudomonas aeruginosa, yeast and mould were investigated. Samples were taken from ten sampling points in ten different villages viz. Parvat(S-1), Kharvasa(S-2), Bonand(S-3), Vesu(S-4) Amroli(S-5), Kadodara(S-6), Chalthan(S-7), Variyav(S-8), Gaviyar(S-9) and Bhairav(S-10). Samples were taken four times in year in the month of May, August, November and February to check the seasonal effects. In village Gaviyar, Gujarat Water Supply and Sewerage Board has set up a treatment plant to supply good quality potable water in few surrounding coastal villages. In all other cases samples were taken from bore-well. Here study reported is for samples taken in May-2004 and August-2004.For colour, iron, sulphate, nitrate, fluoride and silica, instrumental methods like spectrophotometry were used. “Hach-Odyssey spectrophotometer” which has facility to store calibration curves and which can display the value for that parameter directly was used. In present study programmes of “Hach” with their reagents were used while some programmes were prepared by us using our reagents. This is an excellent instrument and results of this instrument are validated by USEPA. Sodium and potassium was determined using flame photometer. It was found that some water samples have higher TDS, chlorides, total hardness and total alkalinity than the permissible limits. In all cases samples were not found to contain significant quantities of bacteria and water was palatable from this point of view.

Designing a pediatric emergency triage and action program

2019 ◽  
Author(s):  
Tsunetoshi Mogi ◽  
Kazuhiko Kodama ◽  
Naoki Doi ◽  
Yasuhiko Konishi ◽  
Hiroshi Nishigori
Keyword(s):  
Rural Areas ◽  
Interprofessional Education ◽  
Model Simulation ◽  
Pediatric Emergency ◽  
Point Of View ◽  
Emergency Setting ◽  
Emergency Situations ◽  
Training Point ◽  
Simulation Based ◽  
Urban And Rural Areas

Abstract BACKGROUND In Japan, non-pediatricians face many instances in which they must see children, partly due to the uneven distribution of pediatricians among urban and rural areas. We aimed to develop and examine the effect of a model simulation-based training program in pediatric primary care for non-pediatric medical and ancillary personnel who express misgivings about seeing pediatric patients in an emergency setting due to their perception of their lack of training in this area.METHODS We instituted a series of workshops on common pediatric emergency situations, first with physicians, and later also including ancillary personnel, as a form of interprofessional education. The entire program was constructed around Design-based Research.RESULTS Feedback from attendees and facilitators was mostly positive, leading us to open the workshops to ancillary personnel.CONCLUSIONS From a training point of view, this epistemological investigation was successful in mitigating anxieties in individuals about seeing pediatric emergency patients. The effects on patient care remain to be studied.

Assessment of the attractiveness of rural areas in terms of internal migration in Russia and the EU countries

2021 ◽  
pp. 40-47
Author(s):  
N.V. Vorontsova ◽  
◽  
A.V. Merzlov ◽  
R.R. Mukhametzyanov ◽  
N.G. Platonovskiy ◽  
...  
Keyword(s):  
Internal Migration ◽  
Rural Areas ◽  
Urban Areas ◽  
Urban Population ◽  
Reverse Flow ◽  
Developed Countries ◽  
Point Of View ◽  
Urban Life ◽  
Innovative Capabilities ◽  
Urban And Rural Areas

Those born in rural areas move to urban areas for both temporary and permanent residence. In general, urbanization is expanding in the world, as evidenced by the increase in the proportion of the urban population. However, recently, in parallel with urbanization, especially in the developed countries of Europe, there has been a reverse flow - the resettlement of a certain part of the urban population to the countryside. It attracts city dwellers with a comparatively better ecological situation, the presence of wide spaces and a sense of freedom. All of this is also supported by modern innovative capabilities. Information and digital technologies are increasingly blurring the boundaries between urban and rural areas. However, the attractiveness of rural areas for permanent habitation in a number of cases, including in our country, is reduced due to the lack of adequate urban living conditions for life and urban-centric state policy. This primarily affects rural areas remote from cities. At the same time, the suburbs, especially megacities, are the most attractive in terms of internal migration. It accommodates the conditions of urban life and the advantage of rural areas. The article touches upon the issues of internal migration of the urban population to the countryside in Russia and a number of European countries (on the example of France and Germany). In this regard, it was noted that this tendency exists, and with an increase in dynamics. As a result of the study, the factors that influence the decision-making by the townspeople to move to settlements located in agricultural areas were identified, and a set of criteria was proposed to assess their attractiveness from the point of view of internal migration of the population.

scholarly journals Well-being in urban and rural areas, challenges, general policies, and their monitoring. Some evidence for Germany before and during the COVID-19 pandemic1

2021 ◽  
pp. 1-21
Author(s):  
Susanne Schnorr-Baecker
Keyword(s):  
Rural Areas ◽  
Well Being ◽  
Current Data ◽  
Point Of View ◽  
Negative Effects ◽  
New Information ◽  
Urban Rural ◽  
Information And Communication ◽  
The Government ◽  
Urban And Rural Areas

Major changes in society, the economy, the natural environment and the government haven taken place. The current pandemic demonstrates even more their social importance and positive or negative effects worldwide. In particular, an increasingly cross-generational awareness of sustainability, new information and communication channels and growing international interdependencies as well as comprehensive policies fostering well-being are gaining worldwide importance and pervade all activities. Germany has – as many nations worldwide – besides its national strategies committed to implement major strategies at United Nations’ and European Union’s levels. In the following, it will be examined which differences exist in the living conditions from a spatial point of view. Using selected indicators and current data mainly from the Federal Statistical Office of Germany, an urban-rural comparison is made for Germany at the lowest federal level ‘Kreise’ (NUTS 3 of the European spatial classification). Even if it is still unclear what the long-term consequences of the drastic measures of the current global COVID-19 pandemic will be, current trends will be briefly presented. Furthermore, this study presents the latest data mainly before the worldwide outbreak of the pandemic and thus will offer starting points for later analysis of opportunities and risks for urban or rural areas post COVID-19.

scholarly journals Trends in the consumption of fish and fish products in Russia

2020 ◽  
Vol 82 (2) ◽  
pp. 181-189 ◽  
Author(s):  
S. M. Ryzhkova ◽  
V. M. Kruchinina
Keyword(s):  
Food Security ◽  
Value Chain ◽  
Rural Areas ◽  
Point Of View ◽  
Soviet Period ◽  
Fishing Industry ◽  
Coastal Zones ◽  
Important Indicator ◽  
Fresh Fish ◽  
Urban And Rural Areas

Fisheries and aquaculture play an important role in ensuring food security, healthy nutrition and employment in various countries and on different continents. In Russia, the fishing industry is attractive for investment. At the same time, many important issues and problems remain unresolved in the industry. The search for promising directions for the development of the domestic fisheries sector is impossible without studying such an important indicator as the consumption of fish and its processed products. The purpose of this work is to study the indicators of fish consumption and products of its processing over a fairly long period from the middle of the last century to the present. Using the methods of scientific analysis, comparison, inductive and deductive, monographic, the following tasks were solved: the assessment of the results of the fishing industry in the Soviet period by indicators: catch, food production, import; the balance of resources for the period from 2011 to 2018 was considered.; a comparison of different consumer groups (population by age group, households in urban and rural areas) is made; fish and aquaculture production is considered from the point of view of food security, the cost indicators and opportunities of the processing industry are studied, the importance of cooperatives as an important infrastructure element, etc. The conclusions are as follows: despite official statistics, the actual consumption of fish per capita is a quarter less than the norm. For uninterrupted supply of fresh fish to the population, it is necessary: urgently allow the population of coastal zones to fish for personal consumption, develop cooperatives, integrate Centrosoyuz organizations in the value chain-catch/breeding-storage-marketing – sale; adopt a law on raw fish; study the experience of Scandinavian countries, in particular, Norway.

Beauty, Choice, and Empowerment

2016 ◽  
pp. 191-207
Author(s):  
Jinat Hosain
Keyword(s):  
Rural Areas ◽  
Cosmetic Surgery ◽  
Structured Interview ◽  
Point Of View ◽  
Theoretical Point ◽  
Case Study Method ◽  
Common Problems ◽  
And Gender ◽  
Urban And Rural Areas

This study tries to explore the interrelated dynamics among cosmetic surgery, choice and empowerment. While poverty, poor health accessibility and gender inequality are common problems in Bangladesh, a growing number of cosmetic clinics are being established and a number of women are increasingly taking up cosmetic surgeries. This study seeks to explore why women choose cosmetic surgeries for beautification, how they experience it and whether cosmetic surgery leads women to be empowered or not. Using qualitative research methods, this study used in-depth semi structured interview, observation and case study method to collect the data from the different cosmetic surgery patients, coming from both urban and rural areas of Bangladesh. The data was further analyzed by coding informants' responses into themes based on the research objectives and the theory, named ‘empowerment'. The study shows that even if the women choose surgery, it does not necessarily enhance their empowerment. That is the surgery that brings changes in physical appearance and might make them attractive, but it contributes little socially in terms of enabling them to make own decision in the contest of family and in community. Rather these women act as prescribed by patriarchal norms and gendered rules. Analyzing the data from theoretical point of view, this study found that the women, irrespective of regional boundaries, can rarely fulfill the condition of empowerment in relation to choice and IAP. The study concludes with some questions and queries that need more research to be answered.

One-Year Prevalence of Migraine in Sweden: A Population-Based Study in Adults

Cephalalgia ◽  
2001 ◽  
Vol 21 (6) ◽  
pp. 664-671 ◽  
Author(s):  
C Dahlöf ◽  
M Linde
Keyword(s):  
Rural Areas ◽  
Time Window ◽  
International Headache Society ◽  
Population Based ◽  
Point Of View ◽  
Opinion Poll ◽  
Swedish Population ◽  
Ihs Criteria ◽  
The Mean ◽  
Urban And Rural Areas

A randomly selected sample of 1668 individuals (782 women and 886 men) aged 18–74 years was interviewed by telephone using a standardized questionnaire including the International Headache Society (IHS) criteria for migraine. The survey was performed by SIFO, the national public opinion poll agency. The results obtained demonstrate that 21% of the Swedish population had suffered from severe headaches during the past year. A majority of these headache sufferers (61%) fulfilled the IHS-criteria for migraine. The 1-year prevalence of migraine in Sweden was found to be 13.2 ± 1.9% (16.7% among women and 9.5% among men). The prevalence of migraine in this Swedish population did not differ between the northern, middle and southern part of Sweden, or between urban and rural areas or different income groups. Only about half (49%) of the migraineurs had been diagnosed by a physician. Among the individuals who fulfilled the IHS criteria for migraine the mean attack-frequency was 1.3 per month and the mean attack-duration was 19 h. If the duration of the attack was disregarded as a strict criterion for migraine (attacks < 4 h and > 72 h were included), the prevalence increased to 17.0 ± 1.9% without affecting the sex distribution. With this amendment, 92% of those who considered their headaches to be migraine or migraine-like in fact fulfilled the alternative criteria for migraine. However, only 76% of those who believed that they had migraine or migraine-like headaches fulfilled the strict IHS criteria for migraine. An extension of the time window from 4 to 72 h may be reasonable both from a pragmatic and from a rational clinical point of view.

Sign in / Sign up

Export Citation Format

Share Document