scholarly journals Greenhouse Assays with Lactuca sativa for Testing Sewage Sludge-Based Soil Amendments

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 209
Author(s):  
Andreia F. Santos ◽  
Ana M. Veríssimo ◽  
Pedro Brites ◽  
Filipe M. Baptista ◽  
José C. Góis ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Lactuca Sativa ◽  
Organic Fertilizer ◽  
Nutrient Recycling ◽  
Commercial Fertilizer ◽  
Short Term ◽  
Green Liquor ◽  
Green Liquor Dregs ◽  
Application Rates ◽  
The Ideal

Sustainable agriculture practices within the guidelines of nutrient recycling and the circular economy must be increasingly promoted. This work aims to evaluate the performance of dried sewage sludge (DSS), green liquor dregs mixed with sewage sludge (DSSA), raw sewage sludge, and commercial organic fertilizer control, using a short-term agronomic assessment with lettuce crop (Lactuca sativa) in greenhouse conditions. Different application rates based on the nitrogen content were tested for each soil amendment: 0, 85, 170, and 225 kg N/ha (treatments T0, T1, T2, and T3, respectively). DSS and DSSA resulted in fresh lettuce productivities 1.3 and 3.2 times higher in T3 than in T0, respectively. The ideal N content in lettuce leaves was reached for all materials and treatments, with the highest values obtained for DSS (2.88–3.33% from T1 to T3). Lettuce produced in soils amended with DSS and DSSA showed also ideal levels of Ca. Overall, the performance of sludge-based products was similar to commercial fertilizer, without impairing the nutritional balance of the crop and the soil.

Short-term usage of sewage sludge as organic fertilizer to sugarcane in a tropical soil bears little threat of heavy metal contamination

2013 ◽  
Vol 114 ◽  
pp. 168-177 ◽  
Author(s):  
Thiago Assis Rodrigues Nogueira ◽  
Ademir Franco ◽  
Zhenli He ◽  
Vivian Santoro Braga ◽  
Lucia Pittol Firme ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Organic Fertilizer ◽  
Tropical Soil ◽  
Short Term

Reuse of treated wastewater and sewage sludge for fertilization and irrigation

2011 ◽  
Vol 64 (4) ◽  
pp. 871-879 ◽  
Author(s):  
Gonçalo Sousa ◽  
David Fangueiro ◽  
Elizabeth Duarte ◽  
Ernesto Vasconcelos
Keyword(s):  
Sewage Sludge ◽  
Dry Matter ◽  
Organic Fertilizer ◽  
Wastewater Irrigation ◽  
Treated Wastewater ◽  
Soil Parameters ◽  
Dry Matter Yield ◽  
Short Term ◽  
Treated Wastewater Irrigation ◽  
Sludge Application

The objective of the present work was to assess the short term potential of treated wastewater and sewage sludge for ornamental lawn fertilization and irrigation. A field experiment was performed and the following treatments were considered: sewage sludge application + irrigation with public water; sewage sludge application + irrigation with treated wastewater; irrigation with public water; irrigation with treated wastewater (TW). Irrigation with treated wastewater showed a positive effect on lawn installation through higher growth of grass (1,667 cm) and higher dry matter yield (18,147 g m−2). These results represent a significant increase in the grass yield compared with public water irrigation. The grass height (2,606 cm) and dry matter yield (23,177 g m−2) increased even more, when sewage sludge produced in the wastewater treatment plant (WWTP) was applied to soil, which proves once more its benefits as an organic fertilizer. At the end of the experiment, an increase of some soil parameters (pH, electrical conductivity, organic matter, Ca2+, Na+, K+, Mg2+ and NH4+) was observed, indicating that treated wastewater irrigation can cause a soil sodization. This short term study indicated that use of treated wastewater and sewage sludge for ornamental lawn fertilization and irrigation is an environmentally sustainable option for re-use of the WWTP by-products.

Introduction

2017 ◽  
Author(s):  
Frances Harris
Keyword(s):  
Cultural Influences ◽  
Short Term ◽  
Historical Figures ◽  
Platonic Love ◽  
Close Friendship ◽  
The Ideal ◽  
At Home

This introduces the Marlborough-Godolphin partnership as not just a political alliance, but a close friendship founded on ideals of platonic love and heroic virtue. It reviews the various discourses of friendship, noting the cultural influences (the essayists Montaigne, Sir William Temple, Saint-Évremond, as well as heroic drama and opera) which carried the ideal forward, but with the growing sense that it must prove itself in actual human transactions. It suggests that studying the Marlborough-Godolphin friendship as it proved itself in war abroad and party conflict at home is revealing of two historical figures whom historians have often found enigmatic, though in the end their commitment to it contributed to their short-term failure as well as their longer-term success. The distinction between friendship and royal favour is also touched on.

The short-term prognostic value of serum platelet to hemoglobin in patients with type A acute aortic dissection

Perfusion ◽  
2020 ◽  
pp. 026765912098222
Author(s):  
Yu Wang ◽  
Tengfei Qiao ◽  
Jun Zhou
Keyword(s):  
Aortic Dissection ◽  
Hospital Mortality ◽  
Acute Aortic Dissection ◽  
Independent Predictor ◽  
Type A ◽  
Short Term ◽  
Survivor Group ◽  
Mortality Hazard ◽  
Mortality Hazard Ratio ◽  
The Ideal

Purpose: Type A acute aortic dissection (AAD) is an uncommon catastrophic cardiovascular disease with high pre-hospital mortality rate without timely and effectively treated. The aim of this study was to assess the value of serum platelet to hemoglobin (PHR) in predicting in-hospital mortality in type A AAD patients. Methods: A total of 183 type A AAD patients were included in this retrospective investigation from January 2017 to December 2019. Admission blood routine parameters were gathered and PHR was computed. The outcome was all-cause in-hospital mortality within 30 days. Results The average levels of serum PHR were significant higher in survivor group than those in non-survivor group (1.14 ± 0.57 vs 0.87 ± 0.47, p = 0.006) and serum PHR was an independent factor associated with in-hospital mortality (hazard ratio (HR): 2.831; 95% confidence interval (CI): 1.108–7.231; p = 0.030). ROC noted that 0.8723 was chosen as the ideal cutoff value with a sensitivity of 64.3% and specificity of 72.5%. In addition, the area under the ROC curve (AUC) was 0.693 (95% CI 0.599–0.787, p < 0.001). Conclusion: Admission serum PHR can be used as an independent predictor of in-hospital mortality in patients with type A AAD.

Fate of phosphorus in the recovery cycle of the kraft pulping process

TAPPI Journal ◽  
2020 ◽  
Vol 19 (3) ◽  
pp. 139-148
Author(s):  
MARYAM SADEGH MOUSAVI ◽  
NIKOLAI DEMARTINI
Keyword(s):  
Kraft Pulp ◽  
Pulp Mill ◽  
Field Studies ◽  
Kraft Pulping ◽  
Pulp Mills ◽  
Recovery Cycle ◽  
Green Liquor ◽  
Green Liquor Dregs ◽  
Kraft Pulp Mills ◽  
Negative Effect

The accumulation of nonprocess elements in the recovery cycle is a common problem for kraft pulp mills trying to reduce their water closure or to utilize biofuels in their lime kiln. Nonprocess elements such as magne-sium (Mg), manganese (Mn), silicon (Si), aluminum (Al), and phosphorus (P) enter the recovery cycle via wood, make-up chemicals, lime rock, biofuels, and process water. The main purge point for these elements is green liquor dregs and lime mud. If not purged, these elements can cause operational problems for the mill. Phosphorus reacts with calcium oxide (CaO) in the lime during slaking; as a result, part of the lime is unavailable for slaking reactions. The first part of this project, through laboratory work, identified rhenanite (NaCa(PO4)) as the form of P in the lime cycle and showed the negative effect of P on the availability of the lime. The second part of this project involved field studies and performing a mass balance for P at a Canadian kraft pulp mill.

scholarly journals Short-Term Decomposition and Nutrient-Supplying Ability of Sewage Sludge Digestate, Digestate Compost, and Vermicompost on Acidic Sandy and Calcareous Loamy Soils

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2249
Author(s):  
Nikolett Uzinger ◽  
Orsolya Szécsy ◽  
Nóra Szűcs-Vásárhelyi ◽  
István Padra ◽  
Dániel Benjámin Sándor ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Organic Carbon ◽  
Carbon Content ◽  
Plant Biomass ◽  
Test Plant ◽  
Organic Carbon Content ◽  
Short Term ◽  
Mineral N ◽  
Average Residual

Organic waste and the compost and vermicompost derived from it may have different agronomic values, but little work is available on this aspect of sewage sludge. A 75-day pot experiment with perennial ryegrass (Lolium perenne) as the test plant aimed to investigate the fertiliser value and organic matter replenishment capacity of digested sewage sludge (DS) and the compost (COM) and vermicompost (VC) made from it, applied in 1% and 3% doses on acidic sand and calcareous loam. The NPK content and availability, changes in organic carbon content and plant biomass, and the efficiency of the amendments as nitrogen fertilisers were investigated. The final average residual carbon content for DS, COM, and VC was 35 ± 34, 85 ± 46, and 55 ± 46%, respectively. The organic carbon mineralisation rate depended on the soil type. The additives induced significant N mineralisation in both soils: the average increment in mineral N content was 1.7 times the total added N on acidic sand and 4.2 times it on calcareous loam for the 1% dose. The agronomic efficiency of COM and VC as fertilisers was lower than that of DS. In the short term, DS proved to be the best fertiliser, while COM was the best for organic matter replenishment.

scholarly journals Sludge Treatment for Application in Agriculture Should be the Option Number One for Ukraine

2017 ◽  
pp. 356-362
Author(s):  
Lidiia Svirenko ◽  
Viktoriia Bondar
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Organic Fertilizer ◽  
Organic Matter Content ◽  
Treatment Plant ◽  
Matter Content ◽  
Biofuel Production ◽  
National Standard ◽  
Arable Soils ◽  
Climatic Zones

Ukraine is well-known in the world as a country with soil rich for humus. Approximately 68% of arable soils in Ukraine have been classificated as chernozem. For last decades decrease of organic matter content in soils of various agri-climatic zones has been surveyed in the country. The main reason of the mentioned process is enormous lack of organic fertilizer (manure) in agriculture connected with decrease in livestock (in 3 times since year 1992). Besides there is expansion of technical crops for biofuel production (like Brassica napus, Helianthus annuus), which are the provocateurs of soils exhaustion. At the same time such important source of organic matter for application in agriculture as sewage sludge (SS) from wastewater treatment plant (WWTP) is not used in Ukraine nowadays. To stop arable soils degradation in regions it is necessary to develop up-to-date management for fertilizer production on WWTPs. The base for the process has to be the acceptance of the goal-oriented National programme, corresponding governmental decrees and implementation of national standard for using sewage sludge as fertilizer.

scholarly journals INVEST ASI, EKSPOR DAN MASALAH DE-INDUSTRIALISASI DI INDONESIA

2017 ◽  
Vol 5 (2) ◽  
pp. 179
Author(s):  
Anton Agus Setyawan ◽  
Fatchurrohman Fatchurrohman
Keyword(s):  
Direct Investment ◽  
Econometric Model ◽  
Slow Growth ◽  
Policy Implications ◽  
Economic Recovery ◽  
Investment Climate ◽  
Short Term ◽  
Investment Rate ◽  
The Ideal

There are two constraints in the process of economic recovery in Indonesia. First, investment rate is decreasing in the last five years. This matter happens due to the bad investment climate in Indonesia. Second, slow growth of export rate in Indonesia. At the present, investment rate in Indonesia is only 22 percent of GDP, while the ideal rate is 30 percent of GDP. Another problem, which may be interrupting the economic recovery, is de-industrialization. The sign of de-industrialization occur by relocation phenomena of FDIfrom Indonesia. This research analyze the effects of direct investment and export to GDP. The tool of analyses of this research is econometric model known as Error Correc­tion Models. The results shows that in a long term and short term, export and direct investment do not have a significant effect to GDP. It shows that Indonesia do not have a clear policy about export and investment. The policy implications of this research are government should have a deregulation policy in the industry and recover investment climate.

scholarly journals Rate and Timing of Meat and Bone Meal Applications Influence Growth, Yield, and Soil Water Nitrate Concentrations in Sweet Corn Production

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1945
Author(s):  
Tiare Silvasy ◽  
Amjad A. Ahmad ◽  
Koon-Hui Wang ◽  
Theodore J. K. Radovich
Keyword(s):  
Soil Water ◽  
Sweet Corn ◽  
Root Zone ◽  
Organic Fertilizer ◽  
Growth Yield ◽  
Split Application ◽  
Meat And Bone Meal ◽  
Bone Meal ◽  
Corn Production ◽  
Application Rates

Using local resources and minimizing environmental impacts are two important components of sustainable agriculture. Meat and bone meal (MBM), tankage, is a locally produced organic fertilizer. This study was conducted to investigate the response of sweet corn (Zea mays L. var. saccharata Stuart.) and soil water nitrate (NO3-N) concentration to MBM application at two locations, Waimānalo and Poamoho, on the island of O’ahu. The objectives were to determine effects of six application rates (0, 112, 224, 336, 448 and 672 kg N ha−1) and two application timings (preplant and split application) on: (1) sweet corn growth, yield, and quality, and (2) soil water nitrate concentration within and below the root zone. The split-plot was designed as four replicates randomly arranged in a complete block. Plant growth of roots and shoots, yield, and relative leaf chlorophyll content of sweet corn increased with increasing application rates of MBM in both locations. At Poamoho, yield was 13.6% greater in preplant versus split application. Nitrate-nitrogen losses were reduced by 20% at Waimānalo and 40% at Poamoho when MBM was applied in split applications. These findings suggest that MBM is an effective nitrogen source for sweet corn and a split application of MBM may reduce the potential for pollution.

scholarly journals PHYSICAL-CHEMICAL CHARACTERIZATION OF SOILS TREATED WITH SEWAGE SLUDGE COMPOST

2010 ◽  
Vol 2 (5) ◽  
pp. 87-92
Author(s):  
Milda Radžiūtė ◽  
Audronė Matusevičiūtė
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Sewage Sludge ◽  
Organic Waste ◽  
Organic Fertilizer ◽  
Chemical Characterization ◽  
Waste Dump ◽  
Sludge Compost ◽  
Sewage Sludge Compost

Sewage dump is the main organic waste component accumulating in water treatment companies, and therefore the utilization of dump remains a burning issue. Fertilization is the most popular and cheapest way of using sewage dump a part of which is intended for agriculture in most European countries for composting purposes. Sewage dump or its compost are suitable for fertilizing the upper layers of the soil in cases the concentration of heavy metals is not greater than sanitarian standards can tolerate. The examinations were carried out using different waste dump rates from Vilnius water treatment facility in willow (Salix viminalis) grown cultivated fields. The analysis of the soil was executed after one and two years following the fertilization process. The obtained results indicate that waste dump is a valuable organic fertilizer which contains small amounts of heavy metals. Separate heavy metals migrate from sewage sludge compost to plants differently. It was noted that the concentration of heavy metals in willows was greater (except for Pb and Cd) than that in the soil.

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