Composting of urban solid waste in Lomé, Togo: Fate of some heavy metals (Ni, Cu, Zn, Pb and Cd)

Koledzi, EK; Baba, Gnon; Tchegueni, Sanonka; Segbeaya, KN; Koriko, Moursalou; Matejka, G.; Tchangbédji, Gado

doi:10.4314/ijbcs.v8i2.37

Cited by 4 publications

(11 citation statements)

References 13 publications

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“…This content is low; however, it complies with the European eco-label standards which places the MO content ≥ 20%. This OM rate is also lower than those obtained by Kolédzi in 2011 [19] .…”

Section: Physico-chemical Characteristics Of the Compostcontrasting

confidence: 60%

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Effects of different doses of compost on the productivity of tomato (Solanum lycopersicum L.) in the city of Lomé (Togo)

2023

JCBSC

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The objective of this study is to evaluate the effectiveness of composts on the productivity of tomato (Solanum lycopersicum L.) by identifying the optimal dose to obtain maximum productivity. The compost used was produced from fermentable fractions of household waste from the city of Lomé. A device in randomized complete blocks with two repetitions comprising five doses of compost (To = control, T1 = 25 t. ha -1 , T2 = 50 t. ha -1 , T3 = 75 t. ha -1 , T4 = 100 t. ha -1 ) was used. The blocks are elementary plots of 6 m 2 each. Transplanting is done in two rows of 10 feet each. On each line, the tomato plants are separated by 0.50 m and the lines are spaced 0.50 m apart. The average density is 3 feet per square meter to ensure good ventilation. The results obtained showed that the yield increased according to the doses of compost provided but decreased from 50 t. ha -1 . There is therefore a compost use limit of between 40 t. ha -1 and 50 t. ha -1 . Market gardeners could use compost for sustainable and effective fertilization to increase their production while preserving soil quality.

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Section: Physico-chemical Characteristics Of the Compostcontrasting

confidence: 60%

“…The pH is slightly alkaline (pH 9.9) like most municipal waste composts [1,[18][19][20][21] . The alkaline pH could be related to the ash content in household waste [21] and this value could also induce a loss of nitrogen in the form of ammonia during composting [21].…”

Section: Physico-chemical Characteristics Of the Compostmentioning

confidence: 99%

Effects of different doses of compost on the productivity of tomato (Solanum lycopersicum L.) in the city of Lomé (Togo)

2023

JCBSC

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“…In the same region, the characteristics presented by other studies reveal a decline in the fermentable fraction in favor of fine particles (30-70%) of the total mass of waste produced [14,19,20]. Indeed, household solid waste production in developing countries depends on people's standard of living, with average daily proportions of household solid waste between 0.5 and 1.1kg/capita/day [7,18,20]. However, in industrialized countries, they are generally between 0.1 and 0.4kg/capita/day [10].…”

Section: Introductionmentioning

confidence: 75%

“…The composition of household solid waste in numerous studies in sub-Saharan Africa is dominated by the fermentable fraction, which accounts for 40-70% of the total mass of waste generated [7,17,18]. In the same region, the characteristics presented by other studies reveal a decline in the fermentable fraction in favor of fine particles (30-70%) of the total mass of waste produced [14,19,20]. Indeed, household solid waste production in developing countries depends on people's standard of living, with average daily proportions of household solid waste between 0.5 and 1.1kg/capita/day [7,18,20].…”

Section: Introductionmentioning

confidence: 99%

Characterization, quantification and recovery prospects for organic waste from the town of Dolisie in the Republic of Congo

Roche Kder BASSOUKA-MIATOUKANTAMA,

Jean de Dieu NZILA,

Noël WATHA NDOUDY

et al. 2023

World J. Adv. Res. Rev.

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Developing countries are facing increasing urbanization accompanied by the production of large quantities of solid household waste, the management of which is a crucial problem. This study aims to characterize, quantify and promote the recovery of organic waste in Dolisie, Republic of Congo. More specifically, it aims to: (i) Determine the flow of solid household waste produced in Dolisie and (ii) Evaluate the physical properties of solid household waste with a view to predicting possible recovery routes for organic waste. Waste from 60 households of different socio-economic levels was collected, weighed, dried and classified daily for 60 days, during the wet (February 15 - May 15, 2021) and dry (July 12 - September 30, 2021) seasons. The results showed that the average daily production of solid household waste in the city of Dolisie was 0.82±0.23kg/capita/day in the wet season and 0.61±0.10kg/capita/day in the dry season. Daily per capita production correlates positively with family income and negatively with household size. The average density of waste produced was 355.71±92.99kg/m3 and 308.02±74.15kg/m3 respectively for the wet and dry seasons. The moisture content of the waste varies between 40-80% in both seasons. The waste stream collected is dominated by waste sizes between 100-20mm. The study revealed that the composition of solid household waste produced in Dolisie is dominated by biodegradable waste, which can be recycled in several sustainable ways: composting, biomass pyrolysis and biogas production.

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“…Comparing the obtained results for heavy metal concentrations with those, our results were in agreement with the findings of other researchers. Many authors' papers confirm a substantial content of heavy metal in composts produced from municipal solid waste (Koledzi et al, 2014;Meller et al, 2015). (Bazrafshan et al, 2016)…”

Section: Evolution Of Ph Values During the Composting Processmentioning

confidence: 96%

Agronomic potential value of household urban solid wastes by composting and composts quality assessment

Alate¹,

Mawussi²,

Ayisah³

et al. 2020

Int. J. Agril. Res. Innov. & Tech.

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Using composting technology, the biodegradable fraction of solid wastes collected from Agbalepedogan district in Lomé (Togo) was transformed into composts with no phytotoxicity suitable for use in agriculture. The household urban solid wastes were mixed with poultry manure and Mucuna pruriens leaves in appropriate percentages and transformed into composts. The composting process was monitored by temperature, pH and C/N ratio controlling. The composts quality was appreciated by phytotoxicity test, particle size distribution, contents of nitrogen, phosphorus, potassium, organic matter and trace elements. The results showed that composts particle size distribution presented four fractions (>10 mm, 5-10 mm, 2-5 mm and ≤2 mm) whose average percentages are respectively 9.04±0.2%; 10.71±0.2%; 12.68±0.4% and 67.53±0.6%, respectively. Composts produced contained 1.02±0.1% - 2.72±0.2% of nitrogen, 1.35±0.3% - 2.70±0.4% of phosphorus, 1.31±0.2% - 1.72±0.3% of potassium and 23.50±0.4% - 37.75±0.5% of organic matter. The pH in final composts were between 8.50±0.2 and 9.00±0.3 while C/N ratio varying from 8.06±0.2 to 13.13±0.2. The concentrations of some heavy metals in final products were 79.8±1.7 - 140.2±1.6 mg/kg.dm of zinc, 27.1±1.01 - 76.6±1.03 mg/kg.dm of copper, 2.07±0.33 - 9.19±0.22 mg/kg.dm of lead, 4.13±0.16 - 11.05±0.36 mg/kg.dm of nickel and 0.79±0.02 - 2.15±0.03 mg/kg.dm of cadmium. These concentrations were lower than the limited value for heavy metals prescribed by French and US EPA regulation for organic and organic-mineral fertilizers. Int. J. Agril. Res. Innov. Tech. 9(2): 1-8, December 2019

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Composting of urban solid waste in Lomé, Togo: Fate of some heavy metals (Ni, Cu, Zn, Pb and Cd)

Cited by 4 publications

References 13 publications

Effects of different doses of compost on the productivity of tomato (Solanum lycopersicum L.) in the city of Lomé (Togo)

Effects of different doses of compost on the productivity of tomato (Solanum lycopersicum L.) in the city of Lomé (Togo)

Characterization, quantification and recovery prospects for organic waste from the town of Dolisie in the Republic of Congo

Agronomic potential value of household urban solid wastes by composting and composts quality assessment

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