Co-composting of faecal sludge and organic solid waste for agriculture: Process dynamics

Cofie, Olufunke O.; Koné, Daouda; Rothenberger, Silke; Moser, Daya; Zubruegg, Chris

doi:10.1016/j.watres.2009.07.021

Cited by 122 publications

(67 citation statements)

References 28 publications

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“…Jednym z procesów biologicznych jest współkompostowanie, które umożliwia zagospodarowanie różnych rodzaje odpadów organicznych. Współkompostowanie odpadów organicznych (odpadów komunalnych, osadów ściekowych i innych) prowadzi do biologicznego procesu dekompozycji materiału organicznego w warunkach tlenowych, a produktem końcowym tego procesu są związki organiczne będące prekursorami humusu [Cofie et al 2009]. Komplementarne właściwości osadów ściekowych i organicznej frakcji odpadów komunalnych (OFOK) powodują, że uzasadniona jest ich przeróbka w procesach biologicznych.…”

Section: Wstępunclassified

Phytoremediation assisted degraded land using closed cycle organic waste matter in nature

2017

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W pracy oceniono wpływ składu mieszaniny kompostowej, składającej się z osadów ściekowych, trawy oraz organicznej frakcji odpadów komunalnych, na efektywność procesu kompostowania oraz wpływ uzyskanych kompostów na efektywność firoremediacji gleb. W pierwszym etapie prowadzono proces kompostowania a następnie w drugiej części badań założono doświadczenia wazonowe i aplikowano dodatki glebowe oraz oceniano ich wpływ na proces rekultywacji gleby zdegradowanej. W ramach badań oceniono właściwości fizyczne i chemiczne gleb po zastosowaniu preparatów w postaci kompostu oraz bionawozu otrzymanego z przetworzenia osadów ściekowych podczas procesu wspomaganej fitoremediacji gleby silnie zdegradowanej (duża zawartość metali ciężkich). Proces kompostowania prowadzono w dwóch etapach, pierwszy etap trwał 4 tygodnie i prowadzony był w zamkniętym bioreaktorze, gdzie doprowadzany był tlen. Natomiast drugi etap obejmował tzw. dojrzewanie proces ten trwał 6 tygodni, również z dostępem do tlenu. Obie mieszanki charakteryzowały się pod koniec procesu dużą zawartością substancji odżywczych oraz niską zawartością metali ciężkich, przez co kwalifikowały się do zastosowania, w procesie rekultywacji gleby zdegradowanej. Przeprowadzone badania potwierdzają możliwość wykorzystania uzyskanych kompostów w celach nawozowych. Również granulat uzyskany z przetwarzania osadów ściekowych wykazał pozytywny wpływ na badaną glebę. Wszystkie dodatki zwiększyły przyrost uzyskanej biomasy wprowadzając do gleby brakujące substancje odżywcze.Słowa kluczowe: kompost, rekultywacja gleb, przyrodnicze wykorzystanie, ASSISTED PHYTOREMEDIATION OF DEGRADED SOIL USING A CLOSED CYCLE OF THE ORGANIC WASTE MATTER IN THE ENVIRONMENT ABSTRACTThe thesis has evaluated the impact of the composition of the compost mixture containing sewage sludge, grass and organic fraction of municipal waste, on the effectiveness of the composting process as well as the influence of the obtained composts on the effectiveness of soil phytoremediation. In the first stage, the composting process was carried out and in the second stage of the research, a pot experiment was conducted and the soil supplements were gradually applied, then their influence on the process of degraded soil renourishment was evaluated. During the research, the physical and chemical properties of the soils after the use of resources such as compost and biofertilizer gained from the processing of sewage sludge during the process of assisted phytoremediation of highly degraded soil (high content of heavy metals) were assessed. The composting process was carried out in two stages, the first of which lasted for four weeks and was carried out in a closed bioreactor with a flow of added oxygen. The second stage, on the other hand, included so-called ripening. This process lasted for six weeks and it also included the flow of added oxygen. By the end of the process, both mixtures were characterized by high content of nutrients and low content of heavy metals which qualified them to be used in the process of reno...

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Section: Wstępunclassified

Phytoremediation assisted degraded land using closed cycle organic waste matter in nature

2017

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“…Numerous experiments have been carried out [19,20] on co-composting two or more streams of organic matter. The combination of sewage or faecal sludge/organic fraction of MSW is the most commonly studied, because the combined treatment of this waste would result in considerable savings compared to separate management.…”

Section: Co-composting Of Organic and Green Waste From Gardensmentioning

confidence: 99%

“…It is advisable to leave the mature compost for 90 days in order to have a better product and it is hygienic to turn the piles over every 10 days. Given the variability of the water content of the input material, it is necessary to change the ratios of mixture so that the moisture of the material to be composted is maintained in the range of optimal values equal to 50%-60% [19].…”

Section: Co-composting Of Organic and Green Waste From Gardensmentioning

confidence: 99%

Management of Municipal Solid Waste in One of the Galapagos Islands

et al. 2014

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This paper analyses some aspects of the management of municipal solid waste in one of the islands of the Galapagos archipelago. The aim is to point out a few aspects of an interesting experience that could help decision managers faced with the organization of the waste sector in similar realities. The relevance of this case study consists in the presence of a very famous National Park surrounding the inhabited area. The role of tourism in the generation of waste is analyzed too.

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“…The main approach is to dry the septage followed by aerobic composting of the dewatered sludge, which sanitizes and reduces its volume. Although faecal sludge can be processed alone, co-composting with another organic waste, such as organic municipal waste is more common, as it improves the composting properties, in particular the carbon-nitrogen ratio and moisture content [14].…”

Section: Introductionmentioning

confidence: 99%

Market Feasibility of Faecal Sludge and Municipal Solid Waste-Based Compost as Measured by Farmers’ Willingness-to-Pay for Product Attributes: Evidence from Kampala, Uganda

et al. 2017

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There is a great potential to close the nutrient recycling loop, support a 'circular economy' and improve cost recovery within the waste sector and to create viable businesses via the conversion of waste to organic fertilizers. Successful commercialization of waste-based organic fertilizer businesses however largely depends on a sound market. We used a choice experiment to estimate farmers' willingness-to-pay (WTP) for faecal sludge and municipal solid waste-based (FSM) compost in Kampala, Uganda and considered three attributes-fortification, pelletization and certification. Our results reveal that farmers are willing to pay for FSM compost and place a higher value on a 'certified' compost product. They are willing to pay US $0.4 per kg above the current market price for a similar certified product, which is 67 times higher than the cost of providing the attribute. Farmers are willing to pay US $0.127 per kg for 'pelletized' FSM compost, which is lower (0.57 times) than the cost of providing the attribute. On the other hand, farmers require US $0.089 per kg as a compensation to use 'fortified' FSM compost. We suggest that future FSM compost businesses focus on a 'certified and pelletized' FSM product as this product type has the highest production cost-WTP differential and for which future businesses can capture the highest percentage of the consumer surplus. The demand for FSM compost indicates the benefits that can accrue to farmers, businesses and the environment from the recycling of organic waste for agriculture.

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Co-composting of faecal sludge and organic solid waste for agriculture: Process dynamics

Cited by 122 publications

References 28 publications

Phytoremediation assisted degraded land using closed cycle organic waste matter in nature

Phytoremediation assisted degraded land using closed cycle organic waste matter in nature

Management of Municipal Solid Waste in One of the Galapagos Islands

Market Feasibility of Faecal Sludge and Municipal Solid Waste-Based Compost as Measured by Farmers’ Willingness-to-Pay for Product Attributes: Evidence from Kampala, Uganda

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