Abstract:Kitchen waste has the characteristics of complex components and differences in texture characteristics in rural areas. A control system based on PLC was designed for the screw press pretreatment with automatic pressure regulation of screw press, equipment cleaning, abnormal feeding handling, working condition monitoring, key data collection and other functions. The system could control the screw press device to treat kitchen waste automatically and realize solid-liquid separation and solid reduction. The screw press control system was tested under the conditions of 0-32 ℃ in different seasons all year round. The results show that the control system can realize automatic running according to the system logic requirements. The system can control the device to steady state within 240 s and keep the control accuracy within 5 percent of the setting value. The drive motor operates stably within 38%-50% of the rated current,and the control system can well match the screw device for kitchen waste pretreatment.
LI Y Z, XI B D, ZHANG B, et al. Technology approach and development mode on distributed treatment of organic contaminants in rural towns and villages[J]. Journal of Environmental Engineering Technology, 2021, 11(2): 365-370. (in Chinese)
JIN Y Y, BING J Y, LUO E H, et al. Prospect of garbage treatment technologies in China based on the classification tendency[J]. Environmental Engineering, 2019,37(9): 149-153,130. (in Chinese)
[3]
KRISTA T, DAVID T. The environmental impacts of alternative food waste treatment technologies in the U.S.[J]. Journal of Cleaner Production,2017,158: 101-108.
[4]
孙邦雨.城市餐厨垃圾固液分离技术与装备研究[D].北京: 北京化工大学,2017.
[5]
BERNSTAD A, JANSEN J L C. Separate collection of household food waste for anaerobic degradation-comparison of different techniques from a systems perspective[J]. Waste Management, 2012,32:806-815.
[6]
MIRMOHAMADSADEGHI S, KARIMI K, TABATABAEI M, et al. Biogas production from food wastes: a review on recent developments and future perspectives[J]. Bioresource Technology Reports, 2019,7:1-10.
[7]
KOUICHI I, YU-KI O, NORIO N. Effects of particle size on anaerobic digestion of food waste[J]. International Biodeterioration & Biodegradation, 2010, 64:601-608.
[8]
ZHANG W, MA H, WANG Q. Pretreatment technology for suspended solids and oil removal in an ethanol fermentation broth from food waste separated by pervaporation process[J]. Desalination,2012,293:112-117.
[9]
KARTHIKEYAN O P, SELVAM A, WONG J W C. Hydrolysis-acidogenesis of food waste in solid-liquid-separating continuous stirred tank reactor (SLS-CSTR) for volatile organic acid production[J]. Bioresource Technology,2016,200:366-373.
ZHANG Y H, WU X F, YANG X L, et al. Design of kitchen waste crushing and dewatering integrated machine[J]. Agricultural Engineering, 2019,9(8): 108-111. (in Chinese)
BAN F C, SUN X X, LIU X, et al. Introduction to a food waste treatment project with automatic sorting,solid-liquid separation,and oil-water separation process[J]. Environmental Engineering, 2016,34(8): 145-148. (in Chinese)
YANG F, YU S F, XU J P. Application study on auto-control system for kitchen trash disposal[J]. Control and Instruments in Chemical Industry, 2011, 38(12): 1502-1505. (in Chinese)
WANG Y, WU P, ZENG Z X, et al. Design and expe-riment of combination air scrubbing system for large-scale pig house[J]. Transactions of the Chinese Society for Agricultural Machinery, 2020,51(4): 344-352. (in Chinese)
CHEN K J, ZUO Y, LI H Q, et al. Design and experiment of heat pump low-temperature circulating grain dr-yer control system[J]. Transactions of the Chinese So-ciety for Agricultural Machinery, 2021, 52(5): 316-323. (in Chinese)
KANG X H, LIU Y, XU Y, et al. Research on variable frequency speed adjustment of induction motor based on PLC fuzzy control[J]. Industrial Control Computer, 2021, 34(8): 81-82. (in Chinese)
LIAO R, ZHAO P, CHEN B S, et al. Using PID function of PLC to realize the design and application of variable frequency constant pressure water supply[J]. Equipment Manufacturing Technology, 2021(6): 151-154. (in Chinese)
[21]
YOUSUF A, JUAN-RODRIGO B, SCHMIDT J E. Effect of total solid content and pretreatment on the production of lactic acid from mixed culture dark fermentation of food waste[J].Waste Management, 2018,77(4): 516-521.
[22]
BERNSTAD A, MALMQUIST L, TRUEDSSON C, et al. Need for improvements in physical pretreatment of source-separated household food waste[J].Waste Ma-nagement, 2013, 33(3): 746-754.
[23]
RAJESH BANU J, MERRYLIN J, MOHAMED USMAN T M, et al. Impact of pretreatment on food waste for biohydrogen production: a review[J]. International Journal of Hydrogen Energy, 2020, 45(36): 18211-18225.