A new tool developed for ultraprecision milling nickel by using magnetic liquid slurries

In developing a new milling technique that can produce high precision, smoothness, and gloss on nickel workpiece surfaces, a widely used material is in industrial applications, particularly in mold manufacturing, in which the production requires exceptionally high accuracy. In this work, the factors influencing the magnetic material milling process are determined by investigating the distribution of magnetic iron (MIGs) and abrasive grains (AGs) in the working surface of magnetic liquid slurry (MLS). The magnetic liquid slurry (MLS) contained commercially available MIGs successfully applied for milling the surface of magnetic materials with extremely high accuracy. Surface roughness ([Formula: see text] nm) without leaving scratches on the surface after milling.

Hydrothermal Carbonization (HTC) of Seaweed (Macroalgae) for Producing Hydrochar

Waste seaweed that is collected at coastal regions of maritime provinces in Canada is creating ecological problems as it promotes an anoxic event, which produces nearly zero dissolved oxygen in water along with hydrogen sulfide emission. The work done in this study attempts to address this issue by producing a coal-like solid hydrochar and nutritious liquid slurry (processed water) by employing a rather recent thermo-chemical process called hydrothermal carbonization (HTC) on the seaweed. The HTC was carried out in a batch reactor system for three different reaction temperatures, 180 °C, 200 °C, 220 °C, and three different reaction times, 30, 60, and 120 min. Each of the produced hydrochars was characterized by different analytical methods. The effects of the process conditions on the yield and the properties of the hydrochar and process water were examined. The hydrochar produced at 220 °C and 120 min showed the highest carbon content (48.5%) and heating value (18.93 MJ/kg). The energy density and carbon to nitrogen (C/N) ratio in the hydrochar increased significantly as compared to raw seaweed. Moreover, HTC reduced the ash yield and volatile compounds of the seaweed. Thus, hydrochar can be used as a fuel for direct combustion, in soil remediation, or in carbon sequestration applications.

Management approach of livestock manure in present farming system of Bangladesh

Laying aside manure meat, milk and egg is considered as key performance indicator of livestock farm profitability of Bangladesh till yet whereas manure contains minimum 45-55% feed nutrient fed to animals. A survey based research work was conveyed to find out the major channel of using this valuable livestock manure by farmers from twelve selected district of Bangladesh. Results showed that most of the cattle and buffalo farmers prefer solid storage system to manage their manure. From this stored manure, about 35% was used for land fertilization, 47% for burning fuel preparation, 8% for composting and remaining 10% become completely wasted. A very few of cattle manure (4.65) was utilized by the care of anaerobic digestion. But this improved system was completely absent in case of buffalo and small ruminants manure management. Dung produced from small ruminants fully goes for solid piling. About 20% of poultry manure managed in improved way and the remaining portion was mostly utilized in a very disparage way. In anaerobic digestion system, the produced gas went for home consumption and bio-slurry creates havoc for both farmer and environment. Land fertilization and aquaculture coves its utilization but the amount is too low compared to its production. Above 52% of total bio-slurry become wasted due to limited knowledge and lack of appropriate handling techniques. The scenario of urine and liquid slurry management was very melancholic. About 0.37 and 0.203 kg methane emission per head per year was calculated from solid storage system of cattle and small ruminant animal manure. The value is also high in burning fuel preparation (5.46 kg) and liquid slurry (5.81 kg) and a bit low in anaerobic digestion system (1.24 kg) per head per year. Asian J. Med. Biol. Res. March 2019, 5(1): 63-70

PENGARUH DOSIS PUPUK BIO SLURRY CAIR DAN JARAK TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN MENTIMUN (Cucumis sativus L.)

This study aims to determine the effect of liquid organic fertilizer on the growth andyield of cucumber plants, to determine the effect of applying spacing on the growth and yield ofcucumber plants, to determine the interaction of liquid bio slurry fertilizer and spacing ongrowth and yield of cucumber plants. The study was conducted using a randomized block designarranged in factorial (RAK) with 2 factors, the first factor was a liquid bio slurry fertilizer (P)dose consisting of 3 levels, 40 l / ha-1 (P1), 80 l / ha- 1 (P2), 120 l / ha-1 (P3). The second factoris the spacing (J) consisting of 3 levels: 30x60 cm (J1), 40x60 cm (J2), 50x60 cm (J3), 60x60 cm(J4). The variables observed included stem diameter, leaf area, and total weight. Data wereanalyzed using analysis of variance (ANOVA) level of 5% and further testing with Duncan 'sMultiple Range Test (DMRT). The results showed: By giving different liquid slurry bio fertilizerdoses gave a significant effect on the leaf area of cucumber plants at the age of 21 HSTobservations. The best treatment for organic fertilizer dosage is in the treatment of 120 L ha -1(P3). The application of spacing has a significant effect on the stem diameter variable at the ageof 28 HST observations, and on leaf area variables at all ages of observation. The best treatmentof spacing on the variable stem diameter and leaf area on the treatment spacing of 60x60 cm(J4). There were no significant interactions on the treatment of liquid bio slurry fertilizer dosesand the spacing of growth and yield of cucumber plants at all ages of observation.

PENGARUH DOSIS PUPUK BIO SLURRY CAIR DAN JARAK TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN MENTIMUN (Cucumis sativus L.)

This study aims to determine the effect of liquid organic fertilizer on the growth andyield of cucumber plants, to determine the effect of applying spacing on the growth and yield ofcucumber plants, to determine the interaction of liquid bio slurry fertilizer and spacing ongrowth and yield of cucumber plants. The study was conducted using a randomized block designarranged in factorial (RAK) with 2 factors, the first factor was a liquid bio slurry fertilizer (P)dose consisting of 3 levels, 40 l / ha-1 (P1), 80 l / ha- 1 (P2), 120 l / ha-1 (P3). The second factoris the spacing (J) consisting of 3 levels: 30x60 cm (J1), 40x60 cm (J2), 50x60 cm (J3), 60x60 cm(J4). The variables observed included stem diameter, leaf area, and total weight. Data wereanalyzed using analysis of variance (ANOVA) level of 5% and further testing with Duncan 'sMultiple Range Test (DMRT). The results showed: By giving different liquid slurry bio fertilizerdoses gave a significant effect on the leaf area of cucumber plants at the age of 21 HSTobservations. The best treatment for organic fertilizer dosage is in the treatment of 120 L ha -1(P3). The application of spacing has a significant effect on the stem diameter variable at the ageof 28 HST observations, and on leaf area variables at all ages of observation. The best treatmentof spacing on the variable stem diameter and leaf area on the treatment spacing of 60x60 cm(J4). There were no significant interactions on the treatment of liquid bio slurry fertilizer dosesand the spacing of growth and yield of cucumber plants at all ages of observation.

High-solids semi-continuous anaerobic digestion of corn silage in bag-type digester

The aim of this paper is to discuss the usability of a newly designed partially stirred horizontal anaerobic bioreactor made from triple layer bag material Sioen B6070 and heated by circulating hot air. For verification of the possibility of processing typical agricultural fibrous substrate at relatively high solids content in this type of reactor, the semi-continuous mesophilic (40±3°C) anaerobic digestion of corn silage of KWS Atletico cultivar was conducted. The reactor with a total volume of 0.7 m3provided 0.5 m3working volume. Liquid slurry from the 1st stage of the agricultural biogas station Pustejov II was used as inoculum. The silage dosage was performed so that the reactor reached high methane production intensity at low volumetric production of the digestate for 120 days. The average organic loading reached 4.27 kgVSm−3d−1while the average hydraulic retention time decreased to 85 days. The dry biogas production intensity was 3.42 mN3m−3d−1with an average methane content of 52.5 vol%. The specific methane production from corn silage was 0.419 mN3kgVS−1. At the end of the test, the digestate contained 13–14 wt% of total solids (TS) and 82–85 wt% of volatile solids in TS. The bag-type digester with hot air heating can be used by small farmers where there is no viable biogas cogeneration.

Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho

The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.