Environmental Engineering
D. I. Kusumawati; S. Mangkoedihardjo
Abstract
Disposable diapers have become a complicated matter due to the risk generation to the environment and human health. This study presents a description of disposable diapers characteristics and the success-proven methods used to handle this waste. In many developing countries where an inadequate waste ...
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Disposable diapers have become a complicated matter due to the risk generation to the environment and human health. This study presents a description of disposable diapers characteristics and the success-proven methods used to handle this waste. In many developing countries where an inadequate waste management system occurs, the handling method selection must consider effectivity, the affordable cost, and the end product quality. Despite the diaper composting has successfully conducted in several previous studies, some issues remain for researchers to address. Thus, it requires an improvement so that the system runs effectively and sustainably. This study aimed to determine the possibility of using Cyanobacteria for enhancing the diapers composting. This study gains insights from previous studies using a literature review method, with the year of publication between 2007 to 2020. The focus of the investigation relates to disposable diapers composting and its optimation by cyanobacteria addition. And so as the future prospecting for application and implication to the environment and human life. Cyanobacteria ability to carry out nitrogen fixation, carbon sequestration, ubiquitous in natural habitat, highly adaptive in a wide range environmental condition, can live in the composting system, perform bioremediation, and its application as quality fertilizer, and potentially degrade plastic polymers, spread the expectation to cyanobacteria which associated with its advantages over other microorganisms to enhance the disposable diapers composting. This study highlights the potential utilization of cyanobacteria as an opportunity for copping disposable diapers pollution. The application of compost resulted expected to provide promising-advantages to the environmental sustainability and agriculture. This paper proposes an overarching review of the feasibility in this regard.
S. Rashad; A.S. El-Hassanin; S.S.M. Mostafa; G.A. El-Chaghaby
Abstract
Olive milling wastewater is a major problem facing the Mediterranean countries producing olive oil like Egypt. In the present study, olive milling wastewater rich with organic phenolic compounds, macro and micro nutrients was used as growing media for cyanobacteria. The cyanobacteria were grown on wastewater ...
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Olive milling wastewater is a major problem facing the Mediterranean countries producing olive oil like Egypt. In the present study, olive milling wastewater rich with organic phenolic compounds, macro and micro nutrients was used as growing media for cyanobacteria. The cyanobacteria were grown on wastewater to obtain two biofertilizers, one bioformulated from single culture of Spirulina platensis and the second from mixed culture of S. platensis, N. muscorum and A.oryzae. The produced biofertilizers, were applied on a sandy soil to grow celery plant under different levels (25, 50 and 75%) of the recommended chemical fertilizers, while the control did not receive any fertilizers in a greenhouse experiment at Giza Research station, Agricultural Research Center, Egypt during the summer season of 2018. Results indicated that application of biofertilizers led to a significant (p<0.05) increase in the height of plant, root and stem lengths over the control group. The number of leaves per plant as well as chlorophyll content were highest in the treatments of Bio-Mix 25 and 50%. Also, these treatments increased the total macro- and micro-nutrients of celery. There was very remarkable enhancement in some recorded sandy soil properties after harvest i.e., pH, total organic matter, total nitrogen, phosphorus and potassium by the treatments of Bio-Mix with 25 and 50%. The present study concluded that 1/4 or 1/2 of the recommended dose of NPK fertilizers could be saved for celery growth by using Bio-Mix product from cyanobacteria and olive milling wastewater as a promising eco-friendly bio-organic fertilizer.
