Determination of the remaining stabilization potential of landfilled solid waste by sludge addition

2000 ◽  
Vol 42 (9) ◽  
pp. 269-276 ◽  
Author(s):  
S. B. Gülec ◽  
T. T. Onay ◽  
A. Erdincler
Keyword(s):  
Solid Waste ◽  
Solid Waste Management ◽  
Control Unit ◽  
Gas Production ◽  
Negative Effects ◽  
Sludge Management ◽  
Positive Effects ◽  
Waste Stabilization ◽  
Solid Waste Landfills

Ultimate disposal of wastewater sludges is one of the most concerning steps of sludge management. As an alternative disposal, reuse of sludge as a soil conditioner or fertilizer has had some success. Another alternative is the addition of sludge to the solid waste landfills. Many researchers have studied the effects of sludge addition to the solid waste stabilization in landfills. However, part of the researchers found positive effects, while others found either negative effects or no effects at all. This study investigates the remaining stabilization potential of the solid waste retrieved from an operating landfill by sludge addition. Determination of the remaining stabilization potential of landfilled solid waste is an important issue in solid waste management. In this study, the further stabilization of landfilled solid waste is achieved by the addition of anaerobically digested sludge to the solid waste with different sludge to waste ratios. Four 10-litre laboratory-scale batch digesters operated under constant temperature of 34°C are used in the experiments. One of the digesters was the control unit operated without any sludge addition. The other three digesters had different sludge to waste ratios; 1:9, 1:6, 1:4 (on wet basis) respectively, in order to find the optimum ratio for the solid waste stabilization. The comparison of gas production and quality and other indicator parameters provided an opportunity to determine the remaining stabilization potential and its significance. The results are translated in terms of conventional landfill practices, as well as emerging technologies for innovative sludge management.

Management of Industrial Waste

2020 ◽  
pp. 278-299
Author(s):  
Aynur Akata
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Human Health ◽  
Industrial Waste ◽  
Solid Waste Management ◽  
Daily Activities ◽  
Waste Generation ◽  
Negative Effects ◽  
Historical Aspects ◽  
The Subject

Al substances that are left directly or indirectly into the environment that may cause harm to human health and the environment are regarded as waste. Waste generation occurs as a result of daily activities during production of goods and after their use by consumers. In order to decrease and/or eliminate the negative effects onto the environment, a proper waste management is crucial for the societies and governments. In this chapter, the subject is explained starting from the brief historical aspects of waste and waste management and continuing with explanation of the main concepts and their types, focusing on solid waste management and recycling. Various examples are given.

Carbon and Green House Gas Evaluation of the Lancaster County Waste Management System

2011 ◽  
Author(s):  
David Traeger ◽  
John Nelson ◽  
Robert Zorbaugh
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Solid Waste Management ◽  
Landfill Gas ◽  
Ghg Emissions ◽  
Gas Production ◽  
Lancaster County ◽  
Green House ◽  
Green House Gas ◽  
System Characteristics

HDR partnered with the Lancaster County Solid Waste Management Authority (Authority) to use the Carbon Assessment Planning Tool (CAPT) to evaluate GHG emissions in their solid waste system. The Authority owns three primary facilities, which comprise the Authority’s solid waste processing and disposal system (the System). The primary facilities in the System are the Transfer Station (TS), the Frey Farm Landfill (FFLF) and the Lancaster County Resource Recovery Facility (RRF). The Authority has recently added wind turbines to its energy portfolio and is considering other changes within its system. The model will be used to evaluate the net effect of the changing system characteristics on the Green House Gas emissions from the system. Reduction in the waste landfilled, changes in Landfill Gas production and increases in energy production will all be evaluated. The paper will review the model assumptions and parameters and will discuss system characteristics. The paper will also discuss a methodology for monetization of additional “green benefits” associated with the GHG emissions reductions through the sale of emission offsets.

Modelling of the Municipal Solid Waste Stabilization Processes in the Landfill Body

2020 ◽  
Vol 24 (12) ◽  
pp. 16-22
Author(s):  
Yu.V. Mozzhegorova ◽  
N.N. Slyusar
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Analysis Data ◽  
Laboratory Modeling ◽  
Dump Site ◽  
Heat Flows ◽  
Mass Losses ◽  
Waste Stabilization ◽  
Municipal Solid Waste Landfills ◽  
Solid Waste Landfills

The paper discusses the questions of municipal solid waste landfills assessment and their impact on the environment during landfill lifespan. The results of waste stabilization processes with different disposal periods using laboratory modeling in bioreactors are presented. Based on physicochemical and biochemical indicators the degree of waste decomposition in relation to the waste disposal time has been determined. Based on the thermal analysis data it has been shown that the intensity of heat flows and mass losses decrease during waste decomposition and the increase of waste stability. It was found that the results of waste stabilization laboratory modeling for the young landfill and the old dump site are similar to the results of field study.

scholarly journals The Application of Multi-Criteria Analysis Methods for the Determination of Priorities in the Implementation of Irrigation Plans

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 501 ◽  
Author(s):  
Barbara Karleuša ◽  
Andreja Hajdinger ◽  
Lidija Tadić
Keyword(s):  
Irrigated Agriculture ◽  
Negative Effects ◽  
Positive Effects ◽  
Analysis Methods ◽  
Case Study Area ◽  
Electre Tri ◽  
Multi Criteria Analysis ◽  
Criteria Importance

Irrigated agriculture has considerable impacts on the environment. To minimize negative effects and maximize positive effects, it is necessary to provide comprehensive analyses beyond the strictly technical domain. In this study, we apply a methodology for determining priorities in implementing irrigation plans using multi-criteria analysis methods on a specific case study area in the sub-catchment area of the Orljava River in Požega–Slavonia County, Croatia. Five potential irrigation areas (Orljava–Londža, Pleternica, Ovčare, Treštanovci, and Venje–Hrnjevac) were analyzed according to five selected criteria: environmental protection, water-related (four sub-criteria), social, economic, and time criteria with different criteria importance (weight). The aim of this study was to confirm the adequacy of using six multi-criteria analysis (MCA) methods (mostly used: PROMETHEE, AHP, ELECTRE TRI, and the less used: DEXi, PRIME, and PCA) in determining priorities for fulfilling irrigation plans, present models for preparation of the input data, apply certain methods, and compare the results on the selected case study area. The methods’ adequacy was confirmed during the research. Five of the six MCA methods identified the Ovčare area as the most appropriate for irrigation development (i.e., it has priority in implementing the irrigation plan). According to one (AHP) of the six methods, Orljava–Londža has more advantages over other areas. All MCA methods, except PCA, chose Venje–Hrnjevac as the least advisable (last to be implemented) alternative. Conclusions from this research confirm findings from recently published research regarding the application of MCA on water management problems.

Turn Brownfield into Green Space-Eco-Regeneration of Closed Landfill

2011 ◽  
Vol 414 ◽  
pp. 63-67 ◽  
Author(s):  
Xin Yi Xiang ◽  
Lei Chen ◽  
Stephen Kueppers ◽  
Mei Hua Zhang ◽  
Hong Tang ◽  
...  
Keyword(s):  
Developing Countries ◽  
Solid Waste ◽  
Green Space ◽  
Negative Effects ◽  
Top Soil ◽  
Reliable Procedure ◽  
Municipal Solid Waste Landfills ◽  
Solid Waste Landfills ◽  
Closed Landfill

With the accumulation of solid waste in developing countries, sites of closed landfills have attracted attentions, which can be sorted as one typical brown field in urban area. Taking closed municipal solid waste landfills as examples, case study for turning brown land into green space in Europe and USA was carried out, based on which, suggestions on the ecological regeneration of brown land in China were put forward. It was put forward that for closed landfill constructed in the earlier days, the reliable procedure for the site generation should be reclamation. If it is not possible to carry out the reclamation engineer at present, establishment of trees on the top soil of closed landfill, in other words, eco-regeneration can reduce the negative effects of landfill as far as possible. For the developing countries, reduction, stabilization and recycling of solid waste should be the final solution for solid waste.

scholarly journals Potentials for commercial production of biogas from domestic food waste generated in Benin Metropolis, Nigeria

2016 ◽  
Vol 20 (2) ◽  
pp. 369-373
Author(s):  
E.P. Akhator ◽  
D.I. Igbinomwanhia ◽  
A.I. Obanor
Keyword(s):  
Solid Waste ◽  
Food Waste ◽  
Solid Waste Management ◽  
Biogas Production ◽  
Second Phase ◽  
Biodegradable Waste ◽  
Daily Food ◽  
Two Phases

The work reported in this paper investigated the potentials of commercial biogas production from biodegradable waste in Benin metropolis. The study was carried out in two phases. The first phase involved characterization of solid waste generated and determination of the quantity of potential feed stock for biogas production in Benin metropolis and the second phase was determination of the amount of biogas obtainable from biodegradable waste. The results from the study showed that an average daily generation rate of 0.358kg per person per day (ppd.) of solid waste is generated in study area. Food waste accounted for about 78.49% of the generated solid waste representing 0.281kg per person per day (ppd.) and a total daily food waste generation of 305.075tonnes. Based on this value for food waste the obtainable biogas was estimated to be 28,836.91m3 of biogas in Benin metropolis per day. This volume of biogas can provide cooking gas for about 24,076.91 families per month in Benin metropolis or alternatively can be utilised to generate about 49.023MW of electricity per day.Keywords: Solid waste management, food waste, anaerobic digestion, biogas

scholarly journals Analysis of modern methodical approaches to determination of locations of solid waste landfills

2020 ◽  
Author(s):  
O. Petrovych ◽  
◽  
T. Yevsiukov ◽  
Keyword(s):  
Solid Waste ◽  
Agricultural Production ◽  
Energy Demand ◽  
Quality Criteria ◽  
Environmental Policies ◽  
Resource Saving ◽  
Advantages And Disadvantages ◽  
Methodological Approaches ◽  
Solid Waste Landfills

The need to introduce resource-saving technologies and environmental policies at both international and regional levels, the rapid growth of the world's population in recent centuries and related processes of industrialization, urbanization, intensification of agricultural production, increasing energy demand and, consequently, increasing waste , polluting the environment further complicates the task of substantiating the location of new landfills and assessing existing ones. In Ukraine, the issue of waste management is regulated by a number of legislative acts, plans, strategies, recommendations, they contain high-quality criteria for assessing the selected site for solid waste, but none of them has clear guidelines for identifying places for potential landfills. That would meet all the above criteria. The authors consider the problem of the lack of methods for selecting sites for landfills in Ukraine in terms of decentralization and reform in the field of waste. The experience of scientists from Russia, America, Serbia, Ethiopia, Italy, China, etc. is also analyzed, their systems of site selection, features, advantages and disadvantages are clarified. In such circumstances, an important scientific and practical task is to improve methodological approaches to determining the location of landfills and the development of land management projects for the allocation of land for landfills, because currently there is no such methodology. At the same time, the methods developed by foreign scientists need to be improved and even if they are used in Ukraine, they require adaptation to local, regional and other conditions.

scholarly journals Pengaruh Motivasi dan Kecemasan Belajar Matematika Terhadap Kesadaran Metakognisi dan Kaitannya dengan Hasil Belajar Matematika

2021 ◽  
Vol 1 (1) ◽  
pp. 81-89
Author(s):  
Manggala Wihasta Jagat Wicaksana ◽  
Baidowi Baidowi ◽  
Eka Kurniawan ◽  
Muhammad Turmuzi
Keyword(s):  
Learning Outcomes ◽  
Linear Regression Analysis ◽  
Learning Motivation ◽  
Validity And Reliability ◽  
Negative Effects ◽  
Positive Effects ◽  
Learning Anxiety ◽  
Quasi Experimental ◽  
Academic Year

This study aims to find out the effect of motivation, anxiety of mathematic’s learning and metacognition awareness to students’ mathematic’s learning outcomes of class XI IPA SMA Negeri 1 Kuripan academic year 2019/2020. The type of this research were quasi-experimental. Determination of the sample used saturation sampling by selected the entire population as a sample, namely class XI IPA. The instrument were questionnaire of motivation, anxiety and metacognition awareness were first tested for validity and reliability in class XII IPA 1 and XII IPA 2. Before a simple linear regression analysis and t-test were performed, the data that had been obtained were first subjected to a prerequisite test. A prerequisite test was normality, homogenity and linearity tests. Based on the results of data analysis used inferential statistical techniques, it can be concluded that, there was a positive effects of mathematic’s learning motivation to metacognition awareness, mathematic’s learning motivation to students’ mathematic’s learning outcomes, metacognition awareness to student mathematic’s learning outcomes, and there was negative effects (r=-0,065) of mathematic’s learning anxiety to students’ mathematic’s learning outcomes.

Bioassay for measuring tannin effects based on gas production technique. 3. Curve of biological equivalence

2005 ◽  
Vol 2005 ◽  
pp. 217-217
Author(s):  
I.C.S. Bueno ◽  
E.F. Nozella ◽  
C. Longo ◽  
P.B. Godoy ◽  
M.R.S.R. Peçanha ◽  
...  
Keyword(s):  
Gas Production ◽  
Production Technique ◽  
Negative Effects ◽  
Nutritional Parameters ◽  
In Vitro Gas Production ◽  
Equivalent Effect ◽  
Chemical Determination ◽  
Nutritional Effects

The chemical determination of tannins has become inefficient to predict the negative effects in nutritional parameters. Apparently, different tannins have distinct activity (or reactivity) resulting in anti nutritional effects. The objective of this work was to test three compounds to establish a curve of biological equivalent effect of tannins using the in vitro gas production technique.

scholarly journals The Relationship between Hope and Perceived Stress in Teacher Candidates

2019 ◽  
Vol 8 (2) ◽  
pp. 1
Author(s):  
Serdar Sucan
Keyword(s):  
Perceived Stress ◽  
Personnel Selection ◽  
Teacher Candidates ◽  
Negative Effects ◽  
Positive Effects ◽  
Preparatory Course ◽  
High Level ◽  
The Relationship

The long-term and uncontrollable stress of KPSS (Personnel Selection Examination) candidates disrupts their psychology, weakens thinking and decision-making, and thus decreases academic achievement. The aim of this study is; It is the determination of the relationship between the level of hope and perceived stress of teacher candidates prepared for KPSS.A total of 382 teacher candidates participated in a special KPSS preparatory course in Kayseri. Candidate teachers who graduated from different departments and universities are between the ages of 21-25 in 41.6%. When we look at socio-demographic characteristics; 68.4% male; 59.9% single and 51.5% were at medium income level. Perceived Stress Scale (PSS-10) and Adult Hope Scale (AHS) were administered to the participants. The mean AHS score of the teacher candidates was 27.73±1.92. This shows the high level of hope of the participants. Perceived Stress level was found to be medium at 53.6%. As a result of the analysis, a significant a negative correlation was found between level of hope and perceived stress (p <0.01). According to regression analysis, level of hope in teacher candidates showed a statistically significant positive effect on perceived stress (p <0.01).As a result, negative relationships were found between hope and perceived stress. It is thought that highly hopeful people perceive stress lower and life satisfaction increases. Therefore, in order to increase the level of hope and to reduce the negative effects of stress, educators should support KPSS candidates. Programs related to the high level of hope to be implemented in schools may have positive effects on individuals' low stress and examinations.

Sign in / Sign up

Export Citation Format

Share Document