Solid – Liquid separation of dairy manure: Distribution of components and methane production

Rico, Carlos; Rico, José Luis; García, H.; Garcı́a, Pilar Garcı́a

doi:10.1016/j.biombioe.2012.01.031

Cited by 37 publications

(25 citation statements)

References 24 publications

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“…The simplest form of treatment, with the lowest capital cost, is to separate the solid from the liquid portion of the manure (Burton, 2007; Fournel et al, 2019). The majority of the P remains with the solid fraction (Rico et al, 2012), which can then be transported off‐farm to be used in areas that need P. The remaining liquid retains a high proportion of ammonium N, so it can be used for crops with a high N demand that are growing on soils that already have adequate P. Some dairy operations are further composting the solids portion and reusing it as bedding materials for the cows (Fournel et al, 2019; Husfeldt et al, 2012); the use of this composted material has been well documented from the perspective of herd health but not regarding the potential for P concentrations to build up in the bedding material as it is reused over multiple cycles.…”

Section: Options For Mitigating Phosphorus Imbalancesmentioning

confidence: 99%

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

2019

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Adequate phosphorus (P) is needed for crop production, but excessive P poses a potential risk to water quality. Results from the cumulative P balance calculations within the indicator of risk of water contamination by phosphorus (IROWC‐P) developed in Canada were assessed to determine the spatial and temporal trends in P accumulation at a regional scale and to consider the implications of these trends. Regional cumulative P balances were calculated from census data as a proxy for soil test P (STP) values, including the contribution of fertilizer or manure P to these balances. Ideally, over time we would see a convergence of soil test values at the low end of the critical response range for crop growth, where agronomic and environmental considerations are balanced, but this does not appear to be the case for many regions in Canada. Nationally, about 61% of agricultural land was predicted to be low in STP, and over half of this land is failing to replace the P that is removed each year. While only about 10% of the agricultural land has accumulated significantly more P than is needed for crop growth, almost all of this land is continuing to accumulate P rather than drawing it down. Manure is the dominant P source for continuing accumulation in regions with high or very high estimated STP; reducing this input will be difficult because of the nature of manure and the investment in buildings and infrastructure tied to specific locations, but it is clear that current Canadian policies need strengthened. Core Ideas Neither deficiency nor excess of P in soil is desirable. Imbalanced P distribution across Canada shows significant areas of deficiency and excess. Regions with high P soils continue to be enriched while regions with low P soils are depleted. In most high P regions, continued P buildup is dominated by livestock manure. Options to rebalance P inputs in these regions include dispersing livestock operations.

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Section: Options For Mitigating Phosphorus Imbalancesmentioning

confidence: 99%

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

2019

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“…The test working conditions were given in Table 2; the choice of the concentration range (expressed in mg per g of liquor total solids) was assessed by the supplier for the P agent and by preliminary flocculation tests for the functionalized chitosan. The prepared P and CHF solutions were respectively mixed with 300 mL of liquor using the methodology of Rico et al [22]. This method (pouring method) was used, preferentially to the jar test method, due to the high solids concentration and the viscosity of the liquor.…”

Section: Experimental Procedures For the Treatment Of Liquormentioning

confidence: 99%

An environmental application of functionalized chitosan: enhancement of the separation of the solid and liquid fractions of digestate from anaerobic digestion

David

Négrell

Vachoud

et al. 2016

Pure and Applied Chemistry

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“…In addition, the BMP test is also useful in estimating the optimum substrate and inoculums ratio and also the detention time of a substrate to achieve the perfect breaking down process Prior to the experiment, inoculums will undergo degasification process to adjust the bacteria condition to the new environment. Several different types of inoculums include sludge of industrial wastewater in anaerobic digester sludge of anaerobic digester from domestic wastewater livestock wastes, or anaerobic suspended sludge from domestic waste, and septic tank sludge [5][6][7][8][9][10][11][12]. This research aims to analyze biodegradability and the potential methane production from organic waste largely available in Indonesia.…”

Section: Introductionmentioning

confidence: 99%