Biological activity during co-composting of sludge issued from the OMW evaporation ponds with poultry manure—Physico-chemical characterization of the processed organic matter

Hachicha, Salma; Sellami, Fatma; Cegarra, J.; Hachicha, Ridha; Drira, Noureddine; Medhioub, Khaled; Ammar, Emna

doi:10.1016/j.jhazmat.2008.05.053

Cited by 97 publications

(46 citation statements)

References 48 publications

(84 reference statements)

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“…Furthermore, only a few days are required to eliminate almost all pathogens, making the compost product safe for agricultural use (Hachicha et al 2009). According to Hachicha et al (2009), the rapid increase of temperature during the thermophilic phase is caused by the rapid breakdown of the available organic and nitrogenous compounds by microorganisms. However, as the organic matter stabilized, the microbial activity and the rate of organic matter decomposition became slower.…”

Section: Composting Profiles Of Opefb Temperature and Bacterial Countmentioning

confidence: 99%

“…According to Tumuhairwe et al (2009), changes in pH from acidic to alkaline could be attributed to microbial activity and the ammonification process that lead to the formation of NH 4 OH, which caused the increasing pH in compost. The continuous addition of POME anaerobic sludge for microbial and alkalinity supplementation to the composting materials proved to be a good strategy whereby pH values were recorded almost stable in the range 6.0 to 8.5 and reported to be suitable for most types of plants (Hachicha et al 2009). Figure 4 shows the profiles for nitrogen (N), carbon(C), and the C/N ratio throughout the composting process.…”

Section: Composting Profiles Of Opefb Temperature and Bacterial Countmentioning

confidence: 99%

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Degradation of Oil Palm Empty Fruit Bunches (Opefb) Fibre During Composting Process Using in-Vessel Composter

Razali¹,

Baharuddin²,

Talib³

et al. 2012

BioResources

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Changes in the lignocellulosic structure of oil palm empty fruit bunches (OPEFB) during composting treatment using an in-vessel composter was investigated in this work. The composting process was completed within 40 days of treatment, and the final C/N ratio achieved was 13.85. Scanning electron microscopy (SEM) revealed that the structure of OPEFB material was severely degraded, especially during the thermophilic phase where the biodegradation process was most active. Close examination of the physicochemical and thermal analysis using X-ray diffraction (XRD), Fourier transform infrared (FTIR), and thermogravimetric and differential thermal analysis (TG/DTA) showed that the crystallinity size of the OPEFB structure decreased. This result was attributed to the removal of silica bodies from OPEFB materials. Also, the functional groups of cellulose, hemicelluloses, and lignin structures had changed throughout the composting period, and the most extensive degradation of cellulose was detected in the thermophilic phase. It was also found that the exothermic peak of the matured compost reduced most significantly compared to the raw OPEFB. In conclusion, the in-vessel composting system was able to enhance the degradation process of OPEFB materials for producing compost.

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Section: Composting Profiles Of Opefb Temperature and Bacterial Countmentioning

confidence: 99%

Section: Composting Profiles Of Opefb Temperature and Bacterial Countmentioning

confidence: 99%

Degradation of Oil Palm Empty Fruit Bunches (Opefb) Fibre During Composting Process Using in-Vessel Composter

Razali¹,

Baharuddin²,

Talib³

et al. 2012

BioResources

View full text Add to dashboard Cite

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“…In general, ideal conditions for an optimal composting process are a carbon-to-nitrogen ratio of the composting material between 20 and 40, moisture content between 50% and 65%, an adequate oxygen supply, a small particle size and enough void space through which air can flow (Chang et al 2006). In order to equilibrate the nutrient imbalance of OMWs, the preferred approach in the majority of cases has been the application of co-composting with other residues, such as those derived from cattle and poultry farming (Paredes et al 2001;Hachicha et al 2008), arable farming (Alburquerque et al 2007;Paredes et al 2002) or industry (Sánchez-Arias et al 2008). Direct amendment with nutrients such as urea has also been proved to be a possibility (Tomati et al 1995), although it is less environmentally desirable.…”

Section: Bioremediation Of Olive-mill Waste By Compostingmentioning

confidence: 99%

Bioremediation and biovalorisation of olive-mill wastes

Morillo

Antízar-Ladislao

Monteoliva‐Sánchez

et al. 2009

Appl Microbiol Biotechnol

203

104

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Olive-mill wastes are produced by the industry of olive oil production, which is a very important economic activity, particularly for Spain, Italy and Greece, leading to a large environmental problem of current concern in the Mediterranean basin. There is as yet no accepted treatment method for all the wastes generated during olive oil production, mainly due to technical and economical limitations but also the scattered nature of olive mills across the Mediterranean basin. The production of virgin olive oil is expanding worldwide, which will lead to even larger amounts of olive-mill waste, unless new treatment and valorisation technologies are devised. These are encouraged by the trend of current environmental policies, which favour protocols that include valorisation of the waste. This makes biological treatments of particular interest. Thus, research into different biodegradation options for olive-mill wastes and the development of new bioremediation technologies and/or strategies, as well as the valorisation of microbial biotechnology, are all currently needed. This review, whilst presenting a general overview, focusses critically on the most significant recent advances in the various types of biological treatments, the bioremediation technology most commonly applied and the valorisation options, which together will form the pillar for future developments within this field.

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“…Indeed, OMW contains a high organic load including carbohydrates, nitrogenated compounds, organic acids, polyalcohols, a residual oil emulsion (GarciaGomez et al 2003) and a high content of phytotoxic and antibacterial phenolic substances, which are recalcitrant to the biological degradation (Aktas et al 2001). Moreover, OMW is characterized by a high potassium concentration and notable rates of nitrogen, phosphorus, calcium, magnesium and iron, which can play an important role on soil fertility (Angelidaki and Ahring 1997;Hachicha et al 2006Hachicha et al , 2008Jarboui et al 2008;Sellami et al 2008). Such high organic load has a toxic effect, especially on fungal spore germination and methanogenic bacteria (Mechri et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Olive mill wastewater disposal in evaporation ponds in Sfax (Tunisia): moisture content effect on microbiological and physical chemical parameters

et al. 2009

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The study of the isotherms desorption of olive mill wastewater (OMW) was investigated to describe its water activity under different saturated environments. The microbial biodegradation of OMW during its storage in 5 evaporation ponds located in Agareb (Sfax-Tunisia) was carried out during the oil-harvesting year held 105 days in 2004. Gravimetric static method using saturated salt solutions was used and OMW as placed at 30 degrees C and under different water activities ranging from 0.11 to 0.90. Eight models were taken from the literature to describe experimental desorption isotherms. During storage, the evolution of physico-chemical parameters including pH, temperature, evaporation, humidity, total phosphorus, chemical oxygen demand (COD), biological oxygen demand (BOD) and phenols and three microbiological flora (aerobic mesophilic bacteria, yeasts and moulds) were considered. At 30 degrees C, when relative humidity increased in the experimented ponds of 69, 84 and 90%, the evaporation speed decreased from 1.24 x 10(-5) to 5 x 10(-6) cm(3) s(-1), from 6 x 10(-5) to 7 x 10(-6) cm(3) s(-1) and from 5 x 10(-6) to 1.1 x 10(-7) cm(3) s(-1) respectively. The desorption isotherm exhibited a sigmoidal curve corresponding to type II, typical of many organic material. The GAB and Peleg models gave the best fit for describing the relationship between the equilibrium moisture content and water activity in OMW (R (2) = 0.998). During the storage period, the analysis showed an increase of all the physico-chemical parameters studied, except phenols and total phosphorus concentrations. The microbiological study showed the predominance of yeasts and moulds and the decrease of bacteria population after 75 days reflecting both effect of recalcitrant compounds and the water activity on microbial growth.

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Biological activity during co-composting of sludge issued from the OMW evaporation ponds with poultry manure—Physico-chemical characterization of the processed organic matter

Cited by 97 publications

References 48 publications

Degradation of Oil Palm Empty Fruit Bunches (Opefb) Fibre During Composting Process Using in-Vessel Composter

Degradation of Oil Palm Empty Fruit Bunches (Opefb) Fibre During Composting Process Using in-Vessel Composter

Bioremediation and biovalorisation of olive-mill wastes

Olive mill wastewater disposal in evaporation ponds in Sfax (Tunisia): moisture content effect on microbiological and physical chemical parameters

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