COMPOSTING AND URBAN WASTE RECYCLING

Author(s):  
A.J. BIDDLESTONE ◽  
D. BALL ◽  
K.R. GRAY
Keyword(s):  
2019 ◽  
Vol 19 (52) ◽  
pp. 193-209
Author(s):  
Maryam Ilanloo ◽  
Hosein Bicgarian ◽  
Mohsen Yahya Soltani ◽  
Mohammad Mehdi Bahramian ◽  
◽  
...  
Keyword(s):  

Author(s):  
K. P. Vani ◽  
K. Bhanu Rekha ◽  
N. Nalini

Agricultural application of urban waste as nutrient source for plants and as soil conditioner, is the most cost effective option of waste management because of its advantages over traditional means such as land filling or incineration. Composting is an attractive alternative of urban waste recycling. Intensive cropping and indiscriminate fertilizer application depleted available NPK in almost all soils in India. Hence, replenishment of shoveled out nutrients is very essential, especially when exhaustive crops like cotton is cultivated. With this backdrop an experiment was conducted during kharif, 2014 carried out at College Farm, College of Agriculture, PJTSAU, Hyderabad, India to find the effect of combined application of municipal city compost with inorganic fertilisers on the yield, quality and economics of Bt cotton. The experiment was laid out in randomised complete block design with three replicates and eleven treatments viz; 100 % NPK alone (RDF: 150: 60: 60 kg NPK ha-1)100% NPK + FYM (farmers practice) and 100 %, 75%, 50% NPK integrated with 3 levels of Godavari Gold (GG) @ 1.25, 1.875 and 2.5 tonnes ha-1 respectively. The results indicated that Bt cotton registered significantly higher yield attributes and yield with the integrated application of 100 % NPK + 2.5 t ha-1 of Godavari Gold compost as compared to 100% NPK alone, 100% NPK + FYM (farmers practice) and 75 % RDF (112.5-45-45 kg NPK ha-1) and 50 % RDF (75-30-30 kg NPK ha-1) integrated with Godavari gold compost @ 1.25, 1.875 and 2.5 tonnes ha-1.There were no significant differences in quality parameters. Highest gross, net returns and B: C ratio was accrued with the application of 100 % NPK + 2.5 t ha-1 of Godavari Gold compost.


2018 ◽  
Vol 11 (90) ◽  
pp. 4465-4472
Author(s):  
Dannis Jimenez Garcia ◽  
Danny Daniel Lopez Juvinao ◽  
Carlos Alberto Socarras Bertiz
Keyword(s):  

2002 ◽  
Vol 30 (3) ◽  
pp. 378-390 ◽  
Author(s):  
CONCHITA GARCÉS ◽  
ALBERTO LAFUENTE ◽  
MARTA PEDRAJA ◽  
PILAR RIVERA

2021 ◽  
Vol 13 (14) ◽  
pp. 7883
Author(s):  
Dong Mu ◽  
Shaoqing Zhang

Facing enormous pressure from the rapid growth of waste on the environment and society, many developed countries have combined urban waste recycling systems with waste classification to reduce pollution and recycle resources. However, this technique is not well established in developing countries. From the 2000s, China has carried out many waste classification recycling projects in many pilot cities although they have yet to reach widespread success. This paper focuses on China’s Newest Waste Classification Recycling Project (NWCRP), which was first implemented in Shanghai from 2019 and has a three-echelon supply chain containing waste classification guiders (WCGs), recyclers and demanders. Firstly, two recycling modes in NWCRP are studied: the recyclers of the first mode are dominated by the recycling company (mode RC), and the recyclers of the second mode are dominated by the environmental sanitation engineering group (mode ESEG). Secondly, a reward—penalty policy is proposed, which can be implemented for WCGs or different recyclers in the two modes (RC or ESEG), and the impacts of different scenarios are also compared. The results showed that (1) with increasing reward—penalty intensity, the sorting rate and the profit show upward trends in two modes, while the subsidy efficiency of government decreases; (2) when the reward—penalty policy is implemented for WCGs, the recyclers’ recycling price decreases in the two modes; (3) all scenarios that implement the reward—penalty policy in mode RC have certain advantages in the sorting rate and profit and (4) with increasing reward—penalty intensity and target sorting rate in the reward—penalty policy, the social welfare first increases and then decreases in all scenarios. Finally, some suggestions on the recycling mode and the reward—penalty policy for establishing a 3RW recycling system are provided.


2020 ◽  
Vol 12 (8) ◽  
pp. 3406 ◽  
Author(s):  
Damián Burneo ◽  
José M. Cansino ◽  
Rocio Yñiguez

Urban mining by recyclers represents a positive environmental impact as well as being part of the waste management chain. This paper analyzes the contribution of waste pickers in the city of Cuenca in Ecuador and the conditions of their activity. This research has a two-fold objective. First, it calculates the reduction of greenhouse gas emissions resulting from the substitution of virgin raw material in the production process by using recycled urban waste. The second objective is to conduct a socioeconomic analysis of the workers involved in the urban waste sector. Cuenca (Ecuador) is the main city used for this case study, thanks to the accessibility of a rich database built from the survey conducted by the NGO Alliance for Development. The information contained in this survey facilitates the identification of potential consumers of the waste industry. This study uses Clean Development Mechanism methodology. Finally, this work proposes a theoretical model for solid waste management, applied to the city, following the principles of the circular economy.


Mathematics ◽  
2021 ◽  
Vol 9 (19) ◽  
pp. 2520
Author(s):  
David Carfí ◽  
Alessia Donato

In this article, we consider the coexistence of competing actors within a specific eco-industrial park. The competing firms dynamics evolves by means of an interplay agreement determined among the competitors themselves. In particular, we show a possible scenario in which the selected eco-industrial competitors could greatly benefit from a coopetitive interaction, within their common eco-park, while improving the general conditions of a near residential area. The associated dynamical coopetitive agreement, aims at the growth and improvement of the firms themselves and of their industrial network (within a virtuous environmental path). As an example, we assume the existence of two competitors selling the same good on the same market, so that, from a competitive point of view, we construct a classic Cournot duopoly model upon which we build up a multidimensional coopetitive agreement. Our eco-friendly deal allows to “enlarge the pie” of possible gains by diminishing sunk costs and other forms of costs, especially the environmental costs associated to the management of urban waste recycling. Consequently, we suggest production methods and production quantitative profiles in order to “share the gains fairly”. We show a complete mathematical analysis of our new economic game and show some of its possible and relevant solutions.


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