The effect of FAS and C/N ratios on co-composting of sewage sludge, dairy manure and tomato stalks

Şevik, Fevzi; Tosun, İsmaı̇l; Eki̇nci̇, Kamil

doi:10.1016/j.wasman.2018.07.051

Cited by 49 publications

(7 citation statements)

References 34 publications

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“…For instance, mixtures 8 and 9 showed the largest amount of TOC and the lowest amount of TKN, and it was mainly related to the large use of olive mill waste in the mixtures, which is known to be rich in organic C and poor in N [30]. Mixture 10, which was mainly composed of sewage sludge (Table 1), showed the lowest TOC and the highest TKN within the tested mixtures, values similar to the composting mixture analyzed in Şevik et al [31]. Due to the large variability of TOC and TKN, the C/N ratio of the studied mixtures also varied from a minimum value of 14.1 (mixture 10) to a maximum value of 61.7 (mixture 8), and only two mixtures (6 and 7) showed a C/N ratio within the range recommended by Reyes-Torres et al (25)(26)(27)(28)(29)(30) [32].…”

Section: Total and Soluble C And N And Temperature Evolutionsupporting

confidence: 67%

The Use of New Parameters to Optimize the Composting Process of Different Organic Wastes

et al. 2021

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The correct development of the composting process is essential to obtain a product of high value from organic wastes. Nowadays, some composting mixture parameters (i.e., air-filled porosity, moisture and the C/N ratio) are used to optimize the composting process, but their suitability is still debated because the literature reports contrasting results. This paper aimed to find other parameters that control the correct development of composting. The relationship between these and the compost quality was then verified. Twelve different composting mixtures were prepared using different organic wastes and bulking agents and were aerobically treated in a 300 L composter. The physico-chemical and chemical parameters of initial mixtures were analyzed, with particular regard to the total and water-extractable forms of organic C and N and their ratios and correlated with the temperature measured during composting. A positive correlation between temperature parameters during the active phase and soluble forms of N in the initial mixtures was found. A high total organic C to soluble N ratio in the composting mixtures was correlated with the low quality of the compost produced. Based on the results, a minimum content of WEN (water-extractable N) (0.4% w/w) or a TOC/WEN (total organic C/WEN) ratio in the range of 40–80 was recommended to ensure the correct development of the process and to produce compost of high quality.

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Section: Total and Soluble C And N And Temperature Evolutionsupporting

confidence: 67%

The Use of New Parameters to Optimize the Composting Process of Different Organic Wastes

et al. 2021

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“…The physicochemical properties of each pile were monitored by collecting three samples from the core after 2, 4, 6, 8, 10, 12, and 14 weeks of the process. The samples were analyzed based on the following characteristics: pH, moisture content, OM content, total nitrogen, total carbon, potassium, C : N ratio, OM, temperature, particle size, and curing time [ 29 , 30 ].…”

Section: Methodsmentioning

confidence: 99%

On-Farm Composting of Agricultural Waste Materials for Sustainable Agriculture in Pakistan

et al. 2022

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Agriculture is the economic backbone of Pakistan. 67% of country’s population resides in rural areas and primarily depends on agriculture. Pakistan's soils are poor in OM and have a low C : N ratio, and the overall fertility status is insufficient to support increased crop yields. Compost is an excellent alternative solution for improving soil OM content. However, this excellent alternative supply in Pakistan has yet to be used. Mass volumes of leaves, grass clippings, plant stalks, vines, weeds, twigs, and branches are burned daily. In this study, different compost piles (P1, P2, and P3) of compost were made using different agricultural and animal waste combinations to assess temperature, pH, and NPK. Results revealed that P3 demonstrated the most successful composting procedure. The temperature and pH levels throughout the composting process were determined in a specified range of 42–45oC and 6.1–8.3, respectively. Total nitrogen content ranged from 81.5 to 2175 ppm in farm compost. Total phosphorus concentrations range from 1.33 to 13.98 ppm, and potassium levels, on the other hand, range from 91.53 to 640 ppm in farm compost. The overall nitrogen concentration grew progressively between each pile at the end of a week. The varied concentrations revealed that adding various forms of agricultural waste would result in a variation in the quantity of NPK owing to microbial activity. On-farm composting has emerged as an effective technique for the sustainability of agricultural activities, capable of resolving crucial problems like crop residues and livestock waste disposal. Based on this study’s results, the pile (P3) combination shows the best NPK value performance and is recommended for agricultural uses to overcome the OM deficiency.

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“…These additives contain less nitrogen and improve the C/N ratio in the mixture which significantly increases the efficiency of microbial transformation and also affects the reduction of unpleasant odor emission [ 120 ]. Thus prepared stable compost free from pathogens can be used as fertilizer [ 121 ].…”

Section: Phosphorus Recovery Technologies and Trends From 10 Years Pe...mentioning

confidence: 99%

Phosphorus recovery from wastewater and bio-based waste: an overview

et al. 2022

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Phosphorus is one of the most important macronutrients needed for the growth of plants. The fertilizer production market uses 80% of natural, non-renewable phosphorus resources in the form of phosphate rock. The depletion of those deposits forces a search for other alternatives, including biological waste. This review aims to indicate the most important ways to recover phosphorus from biowaste, with particular emphasis on wastewater, sewage sludge, manure, slaughter or food waste. A comparison of utilized methods and directions for future research based on the latest research is presented. Combining biological, chemical, and physical methods with thermal treatment appears to be the most effective way for the treatment of wastewater sludge in terms of phosphorus recovery. Hydrothermal, thermochemical, and adsorption on thermally treated adsorbents are characterized by a high phosphorus recovery rate (over 95%). For animal by-products and other biological waste, chemical methods seems to be the most optimal solution with a recovery rate over 96%. Due to its large volume and relatively low phosphorus content, wastewater is a resource that requires additional treatment to recover the highest possible amount of phosphorus. Pretreatment of wastewater with combined methods seems to be a possible way to improve phosphorus recovery. A compressive evaluation of combined methods is crucial for future research in this area.

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The effect of FAS and C/N ratios on co-composting of sewage sludge, dairy manure and tomato stalks

Cited by 49 publications

References 34 publications

The Use of New Parameters to Optimize the Composting Process of Different Organic Wastes

The Use of New Parameters to Optimize the Composting Process of Different Organic Wastes

On-Farm Composting of Agricultural Waste Materials for Sustainable Agriculture in Pakistan

Phosphorus recovery from wastewater and bio-based waste: an overview

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