Pushkara S V
Pushkara is a solid waste management professional with 8 years of experience in solid waste management and renewable energy. He has worked with more than 60 municipalities as adviser and has prepared about 50 assessment and planning reports. He also has experience of heading operations of a solid waste processing plant of 750 Tons per day capacity.
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The project consists of
a. Carrying out IEC activities to create awareness about SWM among the citizens and various stake holders.
b. Carrying out promotion of 3Rs in waste management i.e., Reduce, Reuse and Recycle of waste
c. Carrying out segregation of waste at source, arranging door to door collection of waste
d. Carrying out secondary collection of waste and transportation of waste
e. Carrying out processing of waste using available and accepted technologies like aerobic composting by windrow method, vermi-composting, bio-methanation etc.
f. Carrying out disposal of only reject/inert waste in sanitary landfills
Papers by Pushkara S V
recovery is largely driven by the need to feed the global population with increasingly limited resources under progressing climate change, diminishing global nutrient reserves (peak phosphorus), increasing
fertilizer prices and stricter regulations for safeguarding the environment from pollution. In this context, increasing amounts of plant nutrients will be needed to ensure the food security of an expanding global population. However, while a century ago, food waste was locally recycled, urbanization has created a polarizing effect on food flows, thus generating centres of consumption and waste generation. Nutrient
recycling is therefore crucial in preventing cities from becoming vast nutrient sinks (Drechsel et al., 2015; Otoo et al., 2012; Otoo et al., 2015). Unfortunately, in most low- and middle-income countries, urban
waste management continues to struggle with waste collection and safe disposal making e.g. nutrient recovery only a future target. However, simultaneous efforts are required and possible, also as the waste and sanitation sectors are under pressure to cut costs and show cost recovery. The waste volume reduction through composting and agricultural demand open related opportunities (Drechsel et al., 2015).
Nutrient recovery is additionally of great importance in view of diminishing non-renewable resources, such as phosphorus. As large portions of global phosphate rock deposits cannot be mined efficiently
at competitive costs, there is a great debate on when the world will reach a state of ‘peak phosphorus’ and how far market prices will regulate phosphorus supply (Edixhoven et al., 2013). On the other hand,
there is a consensus that the recovery of phosphorus is an increasingly important task, especially given that soils in many tropical developing countries are of very low fertility and fertilizers too expensive.
The latter is evident in many African countries and attributed to ineffective policies, and limited and inefficient distribution network. This results in exorbitant market prices, and invariably leading to low
fertilizer application rates and decreased agricultural productivity.
Furthermore, nutrient recovery from organic waste streams such as agricultural and agro-industrial waste, the biodegradable fraction of household and market waste, domestic urine and fecal sludge, extends beyond direct economic benefits to health and environmental benefits (ADB, 2011; Hernando-Sanchez et al., 2015; Otoo et al., 2015; Rao et al., 2016). With increasing population growth, nutrients accumulate in consumption centres and contribute to pollution wherever the coverage of waste collection and treatment is insufficient. With progressively limited public funds to support waste management infrastructure and services, particularly in large urban areas in developing countries,
nutrient recovery enterprises will be essential for reducing waste quantities and generating revenues from recovered resources to bridge financial gaps (operational and maintenance [O&M] costs) and
complement other supportive financing mechanisms for waste management.
There is great potential to close the nutrient recycling loop, support a ‘circular economy’ and attain cost recovery within the waste sector, and even to create viable businesses. While, many of these efforts have often been limited in size or duration partly because waste is not viewed as a resource and sanitation is a public service rather than a business; there are many interesting and successful examples of cases and business models emerging in developing countries. These cover a wide range of opportunities for waste valorization (Figure 117) and demonstrate significant potential for scalability and sustainability.
The project consists of
a. Carrying out IEC activities to create awareness about SWM among the citizens and various stake holders.
b. Carrying out promotion of 3Rs in waste management i.e., Reduce, Reuse and Recycle of waste
c. Carrying out segregation of waste at source, arranging door to door collection of waste
d. Carrying out secondary collection of waste and transportation of waste
e. Carrying out processing of waste using available and accepted technologies like aerobic composting by windrow method, vermi-composting, bio-methanation etc.
f. Carrying out disposal of only reject/inert waste in sanitary landfills
recovery is largely driven by the need to feed the global population with increasingly limited resources under progressing climate change, diminishing global nutrient reserves (peak phosphorus), increasing
fertilizer prices and stricter regulations for safeguarding the environment from pollution. In this context, increasing amounts of plant nutrients will be needed to ensure the food security of an expanding global population. However, while a century ago, food waste was locally recycled, urbanization has created a polarizing effect on food flows, thus generating centres of consumption and waste generation. Nutrient
recycling is therefore crucial in preventing cities from becoming vast nutrient sinks (Drechsel et al., 2015; Otoo et al., 2012; Otoo et al., 2015). Unfortunately, in most low- and middle-income countries, urban
waste management continues to struggle with waste collection and safe disposal making e.g. nutrient recovery only a future target. However, simultaneous efforts are required and possible, also as the waste and sanitation sectors are under pressure to cut costs and show cost recovery. The waste volume reduction through composting and agricultural demand open related opportunities (Drechsel et al., 2015).
Nutrient recovery is additionally of great importance in view of diminishing non-renewable resources, such as phosphorus. As large portions of global phosphate rock deposits cannot be mined efficiently
at competitive costs, there is a great debate on when the world will reach a state of ‘peak phosphorus’ and how far market prices will regulate phosphorus supply (Edixhoven et al., 2013). On the other hand,
there is a consensus that the recovery of phosphorus is an increasingly important task, especially given that soils in many tropical developing countries are of very low fertility and fertilizers too expensive.
The latter is evident in many African countries and attributed to ineffective policies, and limited and inefficient distribution network. This results in exorbitant market prices, and invariably leading to low
fertilizer application rates and decreased agricultural productivity.
Furthermore, nutrient recovery from organic waste streams such as agricultural and agro-industrial waste, the biodegradable fraction of household and market waste, domestic urine and fecal sludge, extends beyond direct economic benefits to health and environmental benefits (ADB, 2011; Hernando-Sanchez et al., 2015; Otoo et al., 2015; Rao et al., 2016). With increasing population growth, nutrients accumulate in consumption centres and contribute to pollution wherever the coverage of waste collection and treatment is insufficient. With progressively limited public funds to support waste management infrastructure and services, particularly in large urban areas in developing countries,
nutrient recovery enterprises will be essential for reducing waste quantities and generating revenues from recovered resources to bridge financial gaps (operational and maintenance [O&M] costs) and
complement other supportive financing mechanisms for waste management.
There is great potential to close the nutrient recycling loop, support a ‘circular economy’ and attain cost recovery within the waste sector, and even to create viable businesses. While, many of these efforts have often been limited in size or duration partly because waste is not viewed as a resource and sanitation is a public service rather than a business; there are many interesting and successful examples of cases and business models emerging in developing countries. These cover a wide range of opportunities for waste valorization (Figure 117) and demonstrate significant potential for scalability and sustainability.