Pretreatment of municipal solid waste prior to landfilling

Norbu, Tenzin; Visvanathan, C.; Basnayake, B. F. A.

doi:10.1016/j.wasman.2005.06.006

Cited by 69 publications

(28 citation statements)

References 3 publications

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“…Rapidly growing populations, economic growth and a rise in the community living standards have accelerated the generation rate of MSW, causing its management to be a challenging issue (Ngoc and Schnitzer, 2009;Shekdar, 2009). At present, MSW generation in Asia surpasses 1 million tonnes/day (Hoornweg, and Bhada-Tata, 2012), and it is estimated that in 2025, this figure will increase to 1.8 million tonnes/day (Norbu et al, 2005;Hoornweg and BhadaTata, 2012).…”

Section: Situation Of Municipal Solid Waste Management In Asiamentioning

confidence: 99%

Integrated Solid Waste Management: an approach for enhancing climate co-benefits through resource recovery

Menikpura

Sang-Arun

Bengtsson

2013

Journal of Cleaner Production

120

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Section: Situation Of Municipal Solid Waste Management In Asiamentioning

confidence: 99%

Integrated Solid Waste Management: an approach for enhancing climate co-benefits through resource recovery

Menikpura

Sang-Arun

Bengtsson

2013

Journal of Cleaner Production

120

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“…China, is composed of a relatively high proportion of food waste (>60%). Thereby, this MSW is typically characterized by high water content (even up to 75%) [3][4][5]. The high water content of MSW will reduce the efficiency of its energy recovery.…”

Section: Introductionmentioning

confidence: 99%

Potential gases emissions from the combustion of municipal solid waste by bio-drying

Zhang

Shao

2009

Journal of Hazardous Materials

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“…Passive windrow composting with turning is a widely used strategy to manage the organic fraction of MSW in the country because; MSW of Sri Lanka contains more than 80% (dry weight basis) of organic matter and has moisture content about 60-70% [1]. But there are many problems associated with the composting plants in Sri Lanka.…”

Section: Introductionmentioning

confidence: 99%

Resource Conservation by Effective Composting of Municipal Solid Waste in Sri Lanka – Optimum Moisture Range for the Bio-oxidative Phase

Vpa¹,

Kaluarachchi²,

Pilapitiya³

2017

Int J Waste Resour

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IntroductionComposting is one of the important methods of controlling biological waste in developing country like Sri Lanka. Passive windrow composting with turning is a widely used strategy to manage the organic fraction of MSW in the country because; MSW of Sri Lanka contains more than 80% (dry weight basis) of organic matter and has moisture content about 60-70% [1]. But there are many problems associated with the composting plants in Sri Lanka. The major problem is bad odour of the compost piles during the bio-oxidative phase. It is really a social problem of those areas where closer to the composting plants. Main reason is that, unskilled and uneducated labourers, who often find the addition of water results insufficient or excess moisture contents inside the piles, maintain composting plants. If water is accumulated faster than it is eliminated via either aeration or evaporation (driven by high temperatures), then oxygen flow is impeded and anaerobic conditions result [2]. This usually occurs at a moisture level of about 65 percent or higher. If the moisture level drops below about 40 to 45 percent, the nutrients are no longer in an aqueous medium and easily available to the microorganisms. Their microbial activity decreases and the composting process slow. Below 20 percent moisture, very little microbial activity occurs [3].Another reason is that, literature based moisture contents, which have been prescribed for composting are heavily dependent on the composition of MSW, climatic factors of the regions and the turning frequency of windrows. In this study, determine the optimum moisture range in the composting pile was addressed. To achieve it, the performance of the composting process is checked by employing several physic-chemical parameters proposed in literature through which the metabolic activity of the micro-organisms involved in the composting process was evaluated. Methodology Preparation of windrowThe study was carried out in the composting plant at Meethotamulla, which is located in a suburb of the capital city of Colombo, Sri Lanka. Passive windrow composting with manual turning for aeration was the technique used in the study. The organic fraction was segregated from mixed MSW at the site. Four rectangular shaped composting piles were prepared with 1m high × 2 m width × 3 m length. Moisture ranges were adjusted to 60% ± 10% at first 05 weeks and then reduced to 40% ± 10% in pile Control, 40% ± 10% moisture maintain in pile A while 60% ± 10% moisture maintained in pile B and 80% ± 10% moisture maintain in pile C by manual moisture addition throughout the 08 weeks of bio oxidative period. Moisture was added to all the piles once a week to ensure that the moisture content was within the experimental range. The moisture range of pile Control (60% ± 10%) was maintained for first five weeks and then reduced to 40% ± 10% for the remaining three weeks of the bio-oxidative phase which is the practice of some composting plants in Sri Lanka. Piles were turned manually once a week to aerate the compostin...

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Pretreatment of municipal solid waste prior to landfilling

Cited by 69 publications

References 3 publications

Integrated Solid Waste Management: an approach for enhancing climate co-benefits through resource recovery

Integrated Solid Waste Management: an approach for enhancing climate co-benefits through resource recovery

Potential gases emissions from the combustion of municipal solid waste by bio-drying

Resource Conservation by Effective Composting of Municipal Solid Waste in Sri Lanka – Optimum Moisture Range for the Bio-oxidative Phase

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