Session 18 - Solid waste management

[CEST2019_00965] Quantitative and qualitative assessment of food waste of the hospitality sector in Greece
by Lasaridi Κ., Manios T., Abeliotis K., Terzis E.,Chroni C., Galliou F., Panteli V.,

In Greece, approximately 1.8 million tonnes of food waste are generated each year, mostly disposed of in landfill. Food waste is of concern for businesses in the hospitality and food service sectors, which in Greece dispose of an estimated 100,000 tonnes of food waste annually, almost 6% of the total food waste generated in Greece.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:15 to 16:30
Oral presentation in Solid waste management
[CEST2019_00895] Methane Production and Waste Stabilization in Anaerobic Co-Digestion of Food Waste, Biosolids and Used Cooking Oil
by Amatong E.C., Palenzuela Rollon A.

Restaurants, food processing industries and café kitchen generate significant amounts of food waste (FW) and waste cooking oil. Septage treatment also generates large amount of biosolids. This study explores the application of anaerobic process, which generates methane, a renewable energy resource, to these wastes. The performance of batch anaerobic co-digestion of food waste, biosolids and waste cooking oil at varying waste ratio, namely 0, 30, 50 and 70 mass percent volatile solids (VS) was determined.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:00 to 16:15
Oral presentation in Solid waste management
[CEST2019_00909] Challenging the belief that landfill has higher net CO2 emissions than waste-to-energy incineration or composting
by Hutton B., Norrish M., Horan E.

Landfill is generally believed to have higher greenhouse gas emissions than composting or waste-to-energy. The EU Landfill Directive requires nations to progressively divert biodegradable waste away from landfill. Waste disposal in landfill is at the bottom of its Waste Hierarchy. Many nations also ban landfilling of plastic. These policies may inadvertently increase global warming by increasing incineration. In Europe, Waste-to-Energy (WTE) incineration emits 72,000,000 tonnes of fossil CO2 a year, increasing yearly. Landfill methane is now generally captured.

Session: 18, Room: F, at Thu, 09/05/2019 - 17:06 to 17:09
Flash presentation in Solid waste management
[CEST2019_00841] Waste to Energy Initiatives at the Local Level
by Lim D., Ballesteros F., De Sales Louanne G.

The problem on solid waste has been and still remains as a major problem in the Philippines especially in developing countries where proper facilities for collection and disposal are not always available. In Metro Manila alone, daily waste generation stands at 8,600 tons coming from a population 12.8M. The infrastructure has already reached its maximum capacity resulting to major upsets in environmental quality. The sheer volume of solid waste generated daily poses a big challenge for disposal options since reuse and recycling methods are the only the socially acceptable options.

Session: 18, Room: F, at Thu, 09/05/2019 - 15:00 to 15:15
Oral presentation in Solid waste management
[CEST2019_00787] Health Care Waste Management: Challenges and Solutions
by Halldorsdottir S.

Limited attention has been paid to health-care waste management despite an increase in public concern about the management of such waste on a global basis. The objective of this study was to analyse the issues and challenges of health-care waste management as well as possible solutions. It is estimated that about 50% of the world’s population is at particular risk from improperly treated health-care waste. In most countries wastes from hospitals and other health-related facilities are not required to be treated to remove the thousands of high-volume health-care chemicals.

Session: 18, Room: F, at Thu, 09/05/2019 - 17:00 to 17:03
Flash presentation in Solid waste management
[CEST2019_00730] Microbial Biodiversity of Municipal Solid Waste (MSW) dumpsites of Cochin, Kerala, India.
by Varier J., Kuttamassery N., Chenichery S.

Cochin, the commercial and industrial centre of Kerala, lies on the south-west coast of Arabian sea. It covers an area of 94.88 Km2. There are two major dumpsites in the city, one at Brahmapuram and other at Kalamassery. The proper management of the waste has been a challenging task for the concerned authorities. One of the cost-effective combating ways is the use of microbes. A preliminary attempt was performed to quantify both the physicochemical and microbial characteristics of the dumpsite soils and evaluated by using standard techniques.

Session: 18, Room: F, at Thu, 09/05/2019 - 17:03 to 17:06
Flash presentation in Solid waste management
[CEST2019_00617] Reducing the environmental impact of construction wastes by their use in the preparation of construction mixtures
by Junak J., Sicakova A.

This paper is focused on the utilization of Recycled concrete aggregate (RCA) as a substitute for natural aggregate. Concrete produced in this way is characterized by worse properties than standard concrete, mainly due to the properties of the RCA. One option is to modify the surface of the RCA and thereby to improve the properties of the concrete as a whole. By the method described in this paper, we have succeeded in reducing the total water absorption of concrete by 50%, while the compressive strengths on the tested cubes with the edge 100 mm were 55 MPa.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:57 to 17:00
Flash presentation in Solid waste management
[CEST2019_00548] Conversion of coal fly ash by-products into high-grade zeolites by a quasi natural crystallization process
by Zgureva D., Boycheva S.

This study is focused on a technologically viable approach to obtain zeolite Na-X by aging of lignite coal fly ash (FA) in alkaline solutions at ambient conditions resembling a quasi natural crystallization process. Reaction products were characterized for their phase composition by X-ray diffraction, morphology by scanning electron microscopy (SEM) and surface properties by nitrogen adsorption/desorption isotherms. The effect of the crystallization time was investigated as an important parameter for the extent of zeolitization.

Session: 18, Room: F, at Thu, 09/05/2019 - 15:45 to 16:00
Oral presentation in Solid waste management
[CEST2019_00523] Analysis of the content of germanium, tellurium and thallium in the grounded waste of electronic equipment
by Fornalczyk A., Willner J., Jablonska-Czapla M., Grygoyc K., Rachwal M.

The article draws attention to the problem of the presence of selected metals in waste electrical, electronic equipment (WEEE). These metals belong to the group of critical metals (germanium), strategic metals (tellurium) and highly toxic elements (thallium). Due to low content of these metals in e-waste, they are usually ignored during e-waste analysis, therefore they belong to the least-known metals in the literature regarding waste recycling. Their presence in WEEE can cause them to be concentrated in the environment during improper e-waste processing.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:54 to 16:57
Flash presentation in Solid waste management
[CEST2019_00484] Improving the quality and quantity of source-separated household food waste in areas of different socio-economic characteristics: A case study from Lübeck, Germany
by Walk S., Wardle D., Deegener S., Körner I.

A method aiming at improving source-separation performance of household food waste (FW) was investigated in two areas with different socio-economic characteristics in Lübeck, Germany. This included the test of a new FW collection system including the distribution of small collection buckets to each household. In addition, an information event was organized and households were provided with information material including a waste sorting guide. The study also aimed at assessing the FW avoidance potential.

Session: 18, Room: F, at Thu, 09/05/2019 - 15:30 to 15:45
Oral presentation in Solid waste management
[CEST2019_00325] Valorisation of waste polyethylene by blending with ethylene-vinyl acetate and incorporation of a new type of compatibilizer
by Simon-Stőger L., Varga Cs.

Nowadays polyethylene is one of the polymers produced in the greatest volume, therefore, parallelly the amount of generated waste polyethylene (w-HDPE) significant as well. Valorisation and recycling of w-HDPE can be realized by blending with different types of polymers and/or elastomers in order to result in thermoplastic elastomer end-product for example.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:30 to 16:45
Oral presentation in Solid waste management
[CEST2019_00287] Extraction of Oil from Spent Grounds Coffee using Ultrasound as Pre-Extraction Method
by Cubas A.L.V., Machado M.M., Hermmann K., Bianchet R.T., Moecke E.H.S.

The treatment and processing of coffee annually produces a large volume of biological waste, which contributes to environmental pollution, it is estimated that coffee production generates approx. 6 million tonnes of spent coffee grounds per year in the world (GETACHEW and CHUN, 2017). Thus, the sludge becomes a residue equivalent to approximately 50% of the roasted coffee in the soluble coffee industry (PUJOL D. et al. 2013).

Session: 18, Room: F, at Thu, 09/05/2019 - 16:51 to 16:54
Flash presentation in Solid waste management
[CEST2019_00141] The use of recycled human food waste and leftovers in the aquaculture industry for the partial replacement of commercial manufactured feed as a more sustainable and environmentally friendly practice: Recent research and findings
by Petsas A.S., Vagi M.C.

Food waste or leftovers generated by various raw or processed food materials that are not consumed but instead are usually disposed to waste landfills are regarded as a global issue which impacts human health and environmental sustainability. An enormous pressure in disposing of food wastes in landfill sites already exists and is predicted to be increased during the forthcoming years whereas simultaneously various environmental problems associated with solid wastes have to be solved.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:48 to 16:51
Flash presentation in Solid waste management
[CEST2019_00025] Biosynthesis of xanthan gum from fermenting potato peels extract: Influence of sucrose supplementation on yield and apparent viscosity
by Abud A.K.S., Silva A.S.

Several residues and carbohydrate-rich effluents have been studied as a possible alternative in the substitution or implementation of the traditional cultivation medium of xanthan gum, helping in the management of these residues and, consequently, reducing fermentation costs. This work studied the extract obtained from potato peels for xanthan gum production by fermentation with or not sucrose supplementation. Xanthan gum yield ranged between 2-4 g L-1, and a linear relationship between the amount of added sucrose and gum produced was observed.

Session: 18, Room: F, at Thu, 09/05/2019 - 16:45 to 16:48
Flash presentation in Solid waste management
[CEST2019_00063] Putting accelerated carbonation of bottom ash into practice: operation of a continuous-feed pilot scale reactor
by Schnabel K., Brück F., Mansfeldt T., Weigand H.

Bottom ash (BA) is the dominant residue from municipal solid waste or refuse-derived fuel incineration. Disposal costs chiefly depend on the leachability of trace metals and salts. The mobility of these constituents is classically minimized by ageing for several months. Ageing involves the oxidation of metals, dissolution and precipitation reactions, and most importantly, car-bonation of BA induced by the uptake of carbon dioxide. Enhanced exposure to carbon dioxide sources has been referred to as accelerated carbonation.

Session: 18, Room: F, at Thu, 09/05/2019 - 15:15 to 15:30
Oral presentation in Solid waste management