Ab Jalil, N.A.
(Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia)
,
Basri, H.
(Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia)
,
Basri, N.E. Ahmad
(Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia)
,
Abushammala, Mohammed F.M.
(Department of Civil Engineering, Middle East College, Knowledge Oasis Muscat)
Biodrying is a pre-treatment method that applies biological and mechanical concepts to drying solid waste. In Malaysia, municipal solid waste (MSW) is unseparated and contains a high level of moisture, making the use of technology such as solid waste burning unsuitable and harmful. MSW containing or...
Biodrying is a pre-treatment method that applies biological and mechanical concepts to drying solid waste. In Malaysia, municipal solid waste (MSW) is unseparated and contains a high level of moisture, making the use of technology such as solid waste burning unsuitable and harmful. MSW containing organic material can be processed naturally until the moisture content of the waste is reduced. This study on MSW biodrying was carried out on a laboratory scale to measure the percent moisture content reduction and to monitor temperature patterns under different ventilation periods. This work was conducted using five biodrying reactors volumes of 50 liters each. Reactors were ventilated for 5, 10, 15, 20 and 30 min every 3 h, with a 3 bar air supply. The duration of this process was 14 days for all samples. The results showed that the optimum ventilation time was 10 min, with an 81.84% reduction in moisture content, and that it required almost half of the electricity cost required for the 20 and 30 min ventilations.
Biodrying is a pre-treatment method that applies biological and mechanical concepts to drying solid waste. In Malaysia, municipal solid waste (MSW) is unseparated and contains a high level of moisture, making the use of technology such as solid waste burning unsuitable and harmful. MSW containing organic material can be processed naturally until the moisture content of the waste is reduced. This study on MSW biodrying was carried out on a laboratory scale to measure the percent moisture content reduction and to monitor temperature patterns under different ventilation periods. This work was conducted using five biodrying reactors volumes of 50 liters each. Reactors were ventilated for 5, 10, 15, 20 and 30 min every 3 h, with a 3 bar air supply. The duration of this process was 14 days for all samples. The results showed that the optimum ventilation time was 10 min, with an 81.84% reduction in moisture content, and that it required almost half of the electricity cost required for the 20 and 30 min ventilations.
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제안 방법
Moreover, the National Renewable Energy Policy and Action Plan (2009) has been legislated the implementation of the feed in tariff (FiT) for renewable energies that provide the priorities to electricity generated from indigenous renewable energy resources to be purchased by power utilities at a fixed premium price and for a specific duration [36]. Therefore, this paper discusses the influence of ventilation periods on biodrying in a laboratory scale process to observe the reduction of moisture content percentage and temperature patterns for biodrying MSW also the cost of electricity consumption associated with ventilation periods.
At the same time, moisture inside the reactor could evaporate easily through the porous structure of the geotextile cover. The reactor was equipped with a temperature sensor connected to a data logger, which allowed for the collection and monitoring of temperature data inside the biodrying system.
In this study, a three replication of SMSW samples, weighing approximately 12 kg each, were processed at five different air interval times controlled by mechanical timer. The way of ventilation used the principle of extract-only ventilation system which required simple mechanical ventilation system extracts the air from the ventilated space with ducts and fans.
Air was injected into the reactors from air compressor in compliance with schedule ventilation periods for each reactor. The ventilation periods were as follows: 5 min ventilation and 3 h with no ventilation (Reactor A), 10 min ventilation and 3 h with no ventilation (Reactor B), 15 min ventilation and 3 h with no ventilation (Reactor C), 20 min ventilation and 3 h with no ventilation (Reactor D) and 30 min ventilation and 3 h with no ventilation (Reactor E) continuously for 14 days. Table 2 presents the management of ventilation periods during biodrying process.
In this study, temperature was monitored every day for 14 days to observe the microbial activity that occurred during biodrying. As depicted in Fig.
대상 데이터
The reactor capacity was 50 L, with an external dimension of 600 mm length × 400 mm width × 360 mm height and an internal dimension of 540 mm length × 345 mm width × 275 mm height.
성능/효과
The results of mean values and standard deviations for moisture content reduction in each reactors were 67 ± 0.24% to 33.91 ± 2.24%, 65.57 ± 2.67% to 11.91 ± 1.48%, 67.96 ± 0.44% to 20.57 ± 2.59%, 62.31 ± 4.64% to 15.44 ± 2.95% and 64.56 ± 1.17% to 13.23 ±2%, respectively.
23 ±2%, respectively. Based on the results presented in Fig. 3, reactor B recorded the highest moisture reduction of 81.84%, followed by reactors E (79.51%), D (75.22%), C (69.73%) and A (49.39%).
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