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By-Product Utilization
Published in B. K. Bala, Agro-Product Processing Technology, 2020
Screw presses are basically of three types: Conical screw press, screw press with heated dies, and screw press without heated dies. The merits and demerits of this technology are: (a) continuous output and uniform-sized briquettes; (b) partially carbonized outer surface of the briquette, facilitating easy ignition, combustion, and protection from ambient moisture; (c) smooth run without any shock load; (d) lightweight due to absence of reciprocating parts and flywheel; (e) no contamination of machine parts and the oil used; (f) power requirement of the machine is high compared to that of piston press; and (g) wear and tear is high.
Expression
Published in Ko Higashitani, Hisao Makino, Shuji Matsusaka, Powder Technology Handbook, 2019
In recent years, a screw press, used in the oil milling industry as an expeller, has been widely employed in the chemical industry and sewage sludge treatment. As shown in Figure 5.20.7, materials are fed to a perforated barrel containing a rotating screw worm. Materials trapped between the screw and the inside of the cylindrical barrel pass through a gradually reducing flow area, experiencing an increasing pressure. The compressed cake leaves the unit through an adjustable discharge port.
Biomass as a Source for Heat, Power and Chemicals
Published in Subhas K. Sikdar, Frank Princiotta, Advances in Carbon Management Technologies, 2021
Generally, a screw press consists of a continuous helical thread which is rotated concentrically inside a perforated static cylinder (referred to as a barrel or cage). The material is transported along the length of the barrel, and thanks to the increase in pressure, the oil is expelled and drained through small spaces or grooves that exist in the barrel.
Implementation of the supercritical CO2 technology for the extraction of candlenut oil as a promising feedstock for biodiesel production: potential and limitations
Published in International Journal of Green Energy, 2022
Ahmad Noor Syimir Fizal, Md Sohrab Hossain, Muzafar Zulkifli, Nor Afifah Khalil, Hamidah Abd Hamid, Ahmad Naim Ahmad Yahaya
Different techniques have been utilized to extract oil from candlenuts, such as mechanical screw press, Soxhlet extraction, and microwave extraction. However, scCO2 extraction methods have also been utilized to extract candlenut oil from candlenut seeds (Siddique et al. 2011; Subroto et al. 2017). The extraction of candlenut oil from candlenuts subjected to various extraction methods is presented in Table 4. Mechanical press, which is also known as screw press or hydraulic press, is the most common method used in extracting oils from natural materials. This method is widely used on seeds with high oil content such as olive and candlenut. Mechanical pressing extraction technique operates using a rotating worm shaft to increase the pressure up to 100 MPa by reducing the space and volume on the extraction chamber to squeeze out the oil from the materials (Chapuis et al. 2014). The mechanical press has a relatively simple operation process, giving a high yield of oil extraction (Siregar et al. 2015). However, tedious pretreatments are required on the material prior to the press method such as drying, dehulling, particle size reduction, and cooking to increase the efficiency of the extraction method (Romuli et al. 2017; Siregar et al. 2015).
Briquetting as a means of recovering energy from organic market waste
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
George K. Ngusale, Michael Oloko, Frankline Otiende Awuor
The three specific market waste sieved with mesh of sievers of varying diameters: less than 2 mm, 2–5 mm and 5–10 mm are shown in Figure 5. The sieved components of varying diameters were placed in specific labeled sacks for easier identification. Molasses binder was prepared at different concentration of 10%, 20% and 30% as per ratio of market waste formulation. For example for every 10% or 20% or 30% of required binder, 4 kg of waste were used (4 kg was based on number of experiments to be done). Binders were required to supplement lignin in order to pelletize/solidify non-woody feedstock (Tumuluru, Conner, and Hoover 2016). Pre-weighed amounts of market waste used are shown in Table 3. Thereafter, market waste formulation and molasses binder were carefully mixed to obtain a paste and then placed in locally fabricated briquette machine shown in Figure 2. These two locally fabricated technologies include: manual screw press and manual ram-piston press. Details on principle of operation of the machines are supplied elsewhere (Ngusale et al., 2014). Briquettes made using machines in Figure 2 were sun dried for 3–5 days. The drying period was influenced by prevailing weather condition, shape and size of briquettes.
Progress and utilization of biomass gasification for decentralized energy generation: an outlook & critical review
Published in Environmental Technology Reviews, 2023
Deepak Kumar Singh, Reetu Raj, Jeewan Vachan Tirkey, Priyaranjan Jena, Prakash Parthasarathy, Gordon Mckay, Tareq Al-Ansari
There are different technologies by which briquettes are manufactured. These technologies include piston press technology, screw press, hydraulic press, and roller press. Densifications of briquettes depend on various parameters like temperature, pressure, retention time, moisture, and particle size. The influence of all these parameters on the quality of briquettes is summarized in Table 8.