scholarly journals Production and Optimization of Hermetia illucens (L.) Larvae Reared on Food Waste and Utilized as Feed Ingredient

2020 ◽  
Vol 12 (23) ◽  
pp. 9864
Author(s):  
Anton Gligorescu ◽  
Christian Holst Fischer ◽  
Peter Foged Larsen ◽  
Jan Værum Nørgaard ◽  
Lars-Henrik Lau Heckman

The feed sector requires new sustainable sources of protein, and at the same time better waste management practices are required to decrease and upcycle post-consumers’ food waste (catering and organic household waste), which is currently used for energy production or discharged as waste. The production of Hermetia illucens larvae (L.) (BSFL) was conducted in 15 batches at pilot scale. Furthermore, a feeding strategy experiment was conducted to optimize feedings and decrease handling, followed by a digestibility study for assessing the applicability of BSFL as a feed ingredient. About 190 kg of food waste was used to produce 79 kg of BSFL. The bioconversion of food waste into BSFL was found to be highly efficient, with feed conversion rate (FCR) values ranging between 1.7 and 3.6, when assessed on dry matter. The feeding experiment showed similar BSFL and insect frass production as well as similar FCR, revealing that a decrease in handling can be obtained if two feeding episodes are used. The digestibility of protein and fat was high at 86.2 and 90.4% and revealed that BSFL meal can be successfully used as a protein and fat source in feed for carnivore animals outside the food chain (e.g., pet food).

Author(s):  
Femi O. Omololu ◽  
Akinmayowa S. Lawal

This paper examines the influence of population growth on waste generation in Lagos metropolis, African’s most populous urban conglomeration. Using both quantitative and qualitative methods, the study analyses the pattern of household waste disposal, collection and transportation in Lagos State. It also examines the public-private partnership strategy adopted in waste management. The findings show that population growth significantly influences waste generation and management in Lagos metropolis. As the population increased, the volume of waste generated also increased in each LGA of Lagos State. The public-private partnership strategy has been effective in managing waste, but the Lagos State Waste Management Authority oversight was adjudged as less than satisfactory. The paper concludes that intervention is needed in terms of educating the growing population of the Lagos metropolis on the best waste management practices. It highlights the need for a more efficient and effective publicprivate partnership collaboration to solve this perennial social problem.


Author(s):  
Mariel R. Estrella

Rapid population growth and urbanization over the years has put pressure on natural resources threatening various fragile ecosystems. Naga river in the Philippines became a mute witness to the adverse effects of human activities on its waters. The present study took into account the waste management practices of households along the Naga river to elucidate its relation to the bio-physicochemical state of the river. The comparative analysis of water quality assessment data indicates that there is an observable deterioration of water quality due to its decreased level of Dissolved Oxygen (DO) and above normal pH level. This can be attributed to the continued practice of the households of throwing and discharging 34% and 78% of their solid and liquid wastes, respectively, directly into the river. However, there is a trend of improvement in the Naga river's water quality in terms of other parameters. The study also revealed that the size of built up areas and the household population along the Naga river is not necessarily proportional. Land use and the large household population along the Naga river was found to have higher adverse impacts on the water quality and current state of the Naga river. KEYWORDS: Naga River, water quality, waste management, community survey


2017 ◽  
Vol 15 (4) ◽  
Author(s):  
Saraswathy Kasavan ◽  
Ahmad Fariz Mohamed ◽  
Sharina Abdul Halim

The hotel sector is one of the key players in developing tourism industry in the islands, and contributing towards islands economy, employment opportunities and the overall development. However, food waste generated by hotels has significantly impacted the environment, social well-being and tourism economy. Sustainable food waste management practices are vital among the business operations of the hotel sector to reduce food waste and operational costs through efficient use of food resources. The aim of this paper is to examine current practice of hotel operators towards sustainable food waste management from purchasing of food resources to food wastes disposal. The data was gathered using structured and self-administered questionnaires, which involved 42 hoteliers from the island of Langkawi UNESCO Global Geopark. From the main findings, it was found that there was a lack of emphasis from the hotels on their policy related to wastage of food and unsustainable food consumption pattern by their guests. This reflects on the lack of practices towards sustainable food waste management by the hotel sector. Therefore, planning for sustainable food waste management on island hotels is essential to ensure the protection of environmental resources and to reduce the problem regarding limited capacity landfills on the islands.


2020 ◽  
Author(s):  
Rejani Nair

<p><i>Food waste and its accumulation are becoming a critical problem. </i><i>In this context, this paper takes a look at the general view with the aim of achieving a better understanding of the different types of food waste, and tries to ponder on</i><i> the required steps or standard management practices should be taken to reduce the impact of food waste burden. The study has tried to analyse the waste management practices, cost of waste management practices etc. in small scale food processing units.</i><i></i></p>


2018 ◽  
Vol 9 (1) ◽  
pp. 38-46 ◽  
Author(s):  
Younes Ben Zaied ◽  
Nidhaleddine Ben Cheikh ◽  
Pascal Nguyen ◽  
Mohamed Badrane Mahjoub

This paper examines whether a causal relationship exists between waste tonnage and employment when the waste collection is entrusted to a private operator in France (i.e. waste management policy by delegation of service). The empirical investigation is based on weekly data for four waste streams for the period from January 2015 to June 2017. Using nonstationary time series techniques including cointegration, VECM (Vector Error Correction Model) and long-run causality test of Toda and Yamamoto (1995) within a bivariate framework, the results demonstrate potential causal negative relationship between waste tonnage and employment. For three waste streams (i.e. household waste, outdoor garbage waste and miscellaneous waste), the results suggest that waste management practices that aim at entrusting the collection and treatment to a private operator (i.e. waste management by delegation of service) are not economically beneficial to society, because this policy does not favor environmental jobs creation. The paper calls for the adoption of other waste management practices to preserve employment in the waste collection sector.


2021 ◽  
Vol 17 (39) ◽  
pp. 138
Author(s):  
Mougoue Benoît ◽  
Agofak Clarisse Viviane ◽  
Nya Esther Laurentine

L’urbanisation est l’une des grandes caractéristiques du monde contemporain. Elle génère des effets sur l’environnement et le cadre de vie perceptibles à travers la gestion des déchets. En effet, l’urbanisation s’accompagne d’une croissance de la population urbaine qui à son tour induit une production sans cesse importante de déchets, souvent mal gérés. Cette réflexion vise à cerner les problèmes liés aux différentes pratiques de gestion des déchets ménagers dans le quartier Mambanda de la ville de Douala. L’étude s’appuie sur une approche à la fois qualitative et quantitative qui intègre les recherches documentaires, les observations de terrain et les entretiens avec les acteurs-clé du terrain. Les résultats de l’étude montrent que les déchets solides, liquides et gazeux produits dans le quartier Mambanda sont constitués essentiellement des restes de nourriture, d’eaux usées domestiques et résiduaires, des eaux vannes, des déjections humaines et animales… Les populations, l’Etat et les sociétés privées (Hysacam, CIPRE, associations…) sont les acteurs qui se déploient sur le terrain pour gérer ces déchets qui sont généralement déversés dans les rues, les caniveaux, les cours d’eaux, les champs, les drains et les bacs à ordures. La mauvaise gestion des déchets entraine, dans la plupart des cas, la dégradation de l’environnement et du cadre de vie des populations et par conséquent impacte la santé des populations qui y vivent. Ainsi, la forte implication des populations dans le processus de gestion des déchets (campagnes d’éducation à l’hygiène, création et entretien du réseau d’évacuation…) est la meilleure stratégie durable pour une gestion efficace de ces déchets.   Urbanization is one of the great characteristics of the contemporary world. It generates perceptible effects on the environment and the living environment through waste management. Indeed, urbanization is accompanied by a growth of the urban population which in turn induces an ever-increasing production of waste, which is often poorly managed. This reflection aims to identify the problems related to the different household waste management practices in the Mambanda district of the city of Douala. The study is based on a qualitative and quantitative approach that integrates documentary research, observations and interviews with key players in the field.The results of the study show that the solid, liquid and gaseous waste produced in the Mambanda district consists mainly of food scraps, domestic and waste water, human and animal excreta. The populations, the State and private companies (Hysacam, CIPRE, associations, etc.) are the actors who are deployed in the field to manage this waste which is generally dumped in the streets, gutters, rivers, fields. , drains and garbage bins. Poor waste management leads, in most cases, to the degradation of the environment and the living environment of the populations. Thus, the strong involvement of the population in the waste management process (hygiene education campaigns, creation and maintenance of the disposal network, etc.) is the best sustainable strategy for effective waste management.


2021 ◽  
Vol 13 (17) ◽  
pp. 9986
Author(s):  
Mark Anthony Camilleri

Although previous researchers have explored the circular economy practices of different businesses in various contexts, currently, there are still a few contributions that are focused on the sustainable preparation and consumption of food in the tourism and hospitality industry context. Hence, this paper sheds light on case studies from hotels, restaurants, and cafes that are located in urban tourist destinations. This research suggests that catering businesses can implement a number of responsible initiatives by introducing preventative measures and recycling practices to curb food loss and the generation of waste. In conclusion, this contribution implies that there is scope for regulatory authorities and policymakers to encourage hospitality practitioners to engage in circular economy approaches and to incentivize them to minimize food waste in tourism cities.


2020 ◽  
Vol 116 (1/2) ◽  
Author(s):  
Clare Rodseth ◽  
Philippa Notten ◽  
Harro von von Blottniz

A major limitation to improved waste management in South Africa lies in the paucity of reliable waste data and the exclusion of the contribution of the informal sector from reporting. Due to the disparity in the provision of formal waste management services across households in South Africa, omission of the quantified contribution of informal management practices leads to an inaccurate representation of waste management practices in existing waste data repositories. Given the potentially adverse social and environmental consequences of unregulated waste management practices, a lack of representation thereof has the potential to underestimate impacts. As of 2015, 31% of households are reported as lacking a basic refuse removal service; however, this number cannot necessarily be applied directly to waste quantities, given the regional and socio-economic differences that occur in per capita waste generation rates. The total quantity of domestic waste in South Africa and fraction disposed informally are estimated here, taking into account differences in waste generation rates based on income and settlement type. The characterisation and quantification of unregulated waste streams is beneficial in assessing the magnitude of the problem and, where necessary, identifying mitigation action. The results obtained show that 29% (3.67 million tonnes per annum) of domestic waste generated is not collected or treated via formal management options. Of this waste, the majority (85%) is generated in rural areas. The most common waste management option for unserviced households is a private dump. An estimated 94% of households in unserviced rural areas make use of private dumps, while in unserviced urban and metro areas this decreases to 74% and 71% of households, respectively. Illegal dumping is the next most common waste management option for unserviced areas. The proportion of household waste disposed of via illegal dumping ranges from an estimated 5% for unserviced rural households to 27% in metro areas with the balance made up by ‘other’ disposal/treatment options.


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