Assessment of biofertilizer quality and health implications of anaerobic digestion effluent of cow dung and chicken droppings

Alfa, M. I.; Adie, D. B.; Igboro, S.B.; Oranusi, U. S.; Dahunsi, S. O.; Akali, DM

doi:10.1016/j.renene.2013.09.049

Cited by 114 publications

(73 citation statements)

References 10 publications

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“…For example, Alfa et al (2014) showed that while E. coli and Shigella sp. were effectively removed via AD, species of Salmonella and Klebsiella survived.…”

Section: Pathogen Regrowthmentioning

confidence: 99%

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

et al. 2015

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Effective treatment and reuse of the massive quantities of agricultural and food wastes generated daily has the potential to improve the sustainability of food production systems. Anaerobic digestion (AD) is used throughout the world as a waste treatment process to convert organic waste into two main products: biogas and nutrient-rich digestate, called AD effluent. Biogas can be used as a source of renewable energy or transportation fuels, while AD effluent is traditionally applied to land as a soil amendment. However, there are economic and environmental concerns that limit widespread land application, which may lead to underutilization of AD for the treatment of agricultural and food wastes. To combat these constraints, existing and novel methods have emerged to treat or reuse AD effluent. The objective of this review is to analyze several emerging methods used for efficient treatment and reuse of AD effluent. Overall, the application of emerging technologies is limited by AD effluent composition, especially the total solid content. Some technologies, such as composting, use the solid fraction of AD effluent, while most other technologies, such as algae culture and struvite crystallization, use the liquid fraction. Therefore, dewatering of AD effluent, reuse of the liquid and solid fractions, and land application could all be combined to sustainably manage the large quantities of AD effluent produced. Issues such as pathogen regrowth and prevalence of emerging organic micro-pollutants are also discussed.

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“…For example, Alfa et al (2014) showed that while E. coli and Shigella sp. were effectively removed via AD, species of Salmonella and Klebsiella survived.…”

Section: Pathogen Regrowthmentioning

confidence: 99%

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

et al. 2015

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“…The following model was used (Eq. 6): (6) where the SF max , % is the maximum solubilization factor, L is the time when SF , is equal to ½ of SF max and k, 1/day constant is the variable slope which is called the Hill slope. When k is greater the curve changes more sharply and it means that solubilization process is performed faster.…”

Section: Solubilization Factormentioning

confidence: 99%

“…Many accelerate certain microbial processes in the soil and mobilize nutrients from non-usable to usable form through biological processes [6]. Some bacteria produce acids or enzymes as metabolites and thus are able to solubilize phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Production of phosphate biofertilizers from bones by phosphate-solubilizing bacteria Bacillus megaterium

et al. 2015

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Abstract:In this paper, the production of phosphate biofertilizers from bones by phosphate-solubilizing bacteria Bacillus megaterium is presented. The biofertilizers used in this study contain phosphorus compounds that are in available form to plants as well as components of growth medium. The solubilization was performed under two conditions; with chlorides and with sulphates instead of chlorides. Three biofertilizer forms are proposed in relation to the doses of bones applied in the solubilization process (4, 10 or 20 g L -1 ). The solubilization degree varied according to the bacterial medium formulation and the bones doses. The replacement of chlorides with sulphates yielded a lower growth rate, and resulted, in a lower solubilization. The specific growth rate of the cells of B. megaterium in a sulphate medium was lower than compared with the specific growth rate of cell culture in a medium of chlorides of about 22.4, 39 and 14%, for 4, 10 and 20 g L -1 of bones concentration, respectively. In the stationary phase, the solubilization factor (SF) was higher (61.7%) for the solubilization process conducted in a medium with chlorides − C bone 4 g L -1 , compared with the solubilization process conducted in the medium of sulphates (52.7%).

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“…In 2014 M. I. Alfa et al [21] had proposed the efficiency of the mesophilic bio digestion process in the stabilization and sanitization of cow dung and chicken droppings. Six (6) kg each of cow dung and chicken droppings were collected fresh and free from impurities, pre-fermented, mixed with water in the ratio 1:1 w/v to form slurry, fed into the respective reactors and digested for 30 days at an average ambient temperature of 30degree centigrade.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental Study on Removal of Chromium by using Cow Dung as Low Cost Adsorbents

Thangavel¹,

Gopal²

2017

IJIES

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Abstract:In apparent, the intension is removal of chromium using cow dung as low cost adsorbents from the industrial wastewater. Chromium (Cr) is one of the most toxic substances and is introduced into the environment through a variety of industrial activities. In order to remove the chromium from the contaminated water there are lot of methods available, even though they are not in natural way. In the paper naturally availing material like Cow dung ash is used to remove the chromium by adsorbent method. Since the collected chromium contaminated waste water from the industry will have only a particular Cr+ concentration and pH value, an aqueous solution has been prepared with unique concentration and with different pH values. And activated ash is added separately to the aqueous solution with different dosages and varying contact periods. From the investigation and interpretation of results it has been noted that the Cow dung ash has effectively removed the chromium content when it was added 6g/l to the 1000ml of aqueous solution. In the view of contact time of the adsorbent, 3 hours of period been an ideal one and pH doesn't had a significant effect.

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Assessment of biofertilizer quality and health implications of anaerobic digestion effluent of cow dung and chicken droppings

Cited by 114 publications

References 10 publications

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

Beyond land application: Emerging technologies for the treatment and reuse of anaerobically digested agricultural and food waste

Production of phosphate biofertilizers from bones by phosphate-solubilizing bacteria Bacillus megaterium

Experimental Study on Removal of Chromium by using Cow Dung as Low Cost Adsorbents

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