Revaluation of activated sludge and chicken manure through composting by aerobic process

Mohammed, Bouzid; Amina, Djadi

doi:10.5897/ajar2015.9950

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Throughout the years and even today, people have been using sewage sludge to fertilize fields and fishponds in order to maintain or regenerate the soil organic fraction. This particular by-product mostly undergoes treatment in order to limit sanitary and environmental risks due to its discharge and/or its reuse in agriculture (Bouzid & Djadi, 2015). The conversion of organic waste into vermicompost is of double interest because in addition to treating pollution, it also converts waste into fertilizing material (Bhat et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Vermicomposting of Sludge from the Camp SIC Cité-Verte Wastewater Treatment Plant (Yaounde-Cameroon)

Laure,

Mbappe,

Rodine

et al. 2024

ESJ

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In Yaounde, as in most sub-Sahara African cities, wastewater management is a major concern. Through its national sanitation strategy, Cameroonian government takes many initiatives to improve the urban sanitation situation by constructing social housing, where wastewater treatment plants are integrated. However, their purification performance is often low and the by-products represent great risk factors. This paper focuses on preserving the health of the population, reducing environmental pollution, and improving soil fertility by vermicomposting sludge from the Yaounde Camp SIC Cité-Verte wastewater treatment plant. The methodological approach consisted of the characterisation of sludge, followed by the vermicomposting test. At the end of the 35-day process, the produced vermicompost was characterized, and its agronomic efficiency was tested on waterleaf (Talinum triangulare) cultivation. The Yaounde Camp SIC Cité-Verte wastewater treatment plant consistently produces an average of 239 Kg of sludge per day. The sludge is primarily composed of high carbonaceous material (53%) and contains essential nutrients for plant growth (NPK: 13%), along with pathogenic microorganisms and heavy metals in low concentrations. The characterisation of the vermicomposts obtained after 35 days showed a conservation of nutrients (NPK) concentration and a decrease in carbonaceous matter and heavy metals. Moreover, there was a complete absence of fecal pathogens in the vermicompost of the two setups. The agronomic efficiency of the vermicomposts on waterleaf was shown by a high germination rate (100 % for vermicomposts), a high number of leaves (28 ± 15), a deep green coloration of plants, a great plant length (17.3 ± 4.6 cm), and a large stem diameter (2.1 ± 0.4 cm). The NPK content (˃7%) indicates that the vermicompost produced can be used as an agricultural organic fertilizer.

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Section: Introductionmentioning

confidence: 99%

Vermicomposting of Sludge from the Camp SIC Cité-Verte Wastewater Treatment Plant (Yaounde-Cameroon)

Laure,

Mbappe,

Rodine

et al. 2024

ESJ

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“…required for plant growth (Olufunke et al, 2009;Luna et al, 2011;Nogueira, 2013). This particular by-product generally undergoes a finishing treatment in order to limit sanitary and environmental risks linked to its discharge and or reuse in agriculture (Blaszkow et al, 2010;Bouzid and Djadi, 2015), because the latter is generally biochemically unstable and liable to contain pathogenic organisms and heavy metals (Olufunké et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Co-composting of sewage sludge and Echinochloa pyramidalis (Lam.) Hitchc. Chase plant material from a constructed wetland system treating domestic wastewater in Cameroon

Wafo¹,

Nguemte²,

Nzouebet³

et al. 2016

Afr. J. Environ. Sci. Technol.

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Trials were conducted at the Cité-Verte domestic wastewater treatment station (Yaoundé-Cameroon) in order to assess the effect of three sewage sludge: Macrophyte ratios on the co-composting process and compost quality. The ratios were T1: 25 kg of plant material (Echinochloa pyramidalis) and 75 kg sludge; T2: 50 kg of plant material and 50 kg sludge, and T3: 75 kg of plant material and 25 kg of sludge. The assessment parameters of the co-composting process included the daily evolution of temperature, the pH and water content for each month. The quality of the mature compost obtained was analysed based on their C/N ratio, Ca, Mg, P, K, trace elements and helminth eggs content. During cocomposting, maximum temperatures ranged from 45.3 ± 4.7°C (T1) to 70.77 ± 2.76°C (T3). Mature cocompost was obtained after 3 months (T1), 4 months (T2) and 5 months (T3). Mean pH and C/N ratio of co-composts respectively ranged from 7.26 to 7.62 and from 10 to 15. In mature compost, the average values of organic matter, N and P respectively were 3323 ± 405 mg/kg, 165 ± 32 mg/kg and 36 ± 5 mg/kg for T1; 2945 ± 128 mg/kg, 152 ± 30 mg/kg and 27 ± 6 mg/kg for T2; and 228 ± 103 mg/kg, 105 ± 48 mg/kg and 7 ± 1 mg/kg for T3. K content was 1 mg/kg in all three co-composts. Heavy metals were found at trace levels. Helminth eggs concentration in compost was 0.2 ± 0.03 egg/g (T1), 0.1 ± 0.02 egg/g (T2) and 0.007 ± 0.01 egg/g (T3). All these co-composts did not present a significant hygienic risk with regards to WHO guidelines (2006) for safe reuse of faecal matter or faecal sewage in agriculture (less than 1 egg/g TS). For a given amount of plant harvested, it was concluded that the quickest way to produce a compost safe of parasites will be to mix them with 3/4 of sludge from the digestion tank.

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Evaluation of specific capacity of poultry litter in heavy metal sorption

Kucharski

Białecka

Śliwińska

et al. 2021

Water Air Soil Pollut

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The article highlights sorptive properties of poultry litter. Preliminary studies on sorption of Cd2+, Cu2+, Ni2+, Pb2+, Zn2+ ions at the concentration range of 1–1000 mg L-1 were carried out. Langmuir and Freundlich models were used to determine the potential capacities of the poultry litter. Sorption parameter outcome from isotherms exhibited the following order: Pb > Cd > Cu > Zn > Ni. During the batch adsorption experiment, a decrease of the absorbance of solutions in the UV-Vis range was observed, proportional to the increase in the concentration of metals in the solutions. This phenomenon was associated with the precipitation of complexes of fulvic/humic-like compounds and uric acid with metals. The decrease in dissolved organic carbon (DOC) concentration confirmed previous assumptions. The FT-IR spectroscopy showed significant role of uric acid in Cd2+, Pb2+, Zn2+ sorption. FT-IR measurements allowed determining the type of active sites involved in sorption, especially carboxylic groups. The findings should be helpful in soil reclamation practices with poultry litter.

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Revaluation of activated sludge and chicken manure through composting by aerobic process

Cited by 3 publications

References 21 publications

Vermicomposting of Sludge from the Camp SIC Cité-Verte Wastewater Treatment Plant (Yaounde-Cameroon)

Vermicomposting of Sludge from the Camp SIC Cité-Verte Wastewater Treatment Plant (Yaounde-Cameroon)

Co-composting of sewage sludge and Echinochloa pyramidalis (Lam.) Hitchc. Chase plant material from a constructed wetland system treating domestic wastewater in Cameroon

Evaluation of specific capacity of poultry litter in heavy metal sorption

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