Recently, the 12T/H floating fish and 8T/H sinking fish feed production lines undertaken by RICHI in Thailand passed the environmental impact assessment and are about to start construction.

Construction content of the project: The main buildings include production workshops, raw material warehouses, finished product warehouses, machine repair rooms, boiler rooms, etc., including 2 puffed fish feed production lines and 1 pellet fish feed production line. The main raw and auxiliary materials are soybean meal, cotton meal, Rapeseed meal, flour, corn, distiller’s grains, peanut meal, soybean oil, minerals, vitamins, etc. The production scale is 40,000 tons/year of pellet fish feed and 60,000 tons/year of puffed fish feed. The total project investment is US$1.3 million.

The environmental protection measures for this project are as follows:

• Wastewater treatment measures:
  • One third-level septic tank treats domestic sewage. Volume 31m3. The desulfurization and denitrification water generated during the production process of this project is recycled and not discharged. The living area of this project relies on the client company’s dormitories, office buildings, and canteens.
  • The domestic wastewater generated is treated by the feed company’s third-level septic tanks and third-level grease traps, and then discharged into the municipal sewage pipe network and eventually into the local sewage Treatment plant for further processing. The desulfurization and denitrification water is recycled and not discharged.
• Waste gas treatment measures:
  • The dust waste gas generated during raw material crushing and other processes is treated with a cyclone dust collector + pulse bag dust collector and then discharged to high altitude through two exhaust pipes with a height of 40m.
  • The dust waste gas generated during drying, cooling and other processes is treated with a cyclone dust collector and then discharged to high altitude through four exhaust pipes with a height of 21m. Dust ≤120mg/m3.
  • The dust generated by this project mainly comes from the crushing and mixing of various raw materials during the production process. The customer company sets up dust collection hoods at each dust-generating point in the crushing section of this project, and discharges the dust through the air inlet into the cyclone dust collector + pulse bag dust collector. The treated exhaust gas passes through two 40-meter-high exhaust pipes.
  • The top of the workshop is discharged to high altitude; after the exhaust gas from the drying and cooling section is processed by the cyclone dust collector, it is discharged to high altitude through two 21-meter-high exhaust pipes.
  • This project is equipped with a 20t/h coal-fired boiler. After the boiler exhaust gas is dusted by a pulse bag dust collector, alkaline desulfurization, and non-catalytic reduction (SNCR) denitrification, it is discharged through a 45-meter-high chimney. Online pollutant monitoring equipment has been installed at the boiler exhaust gas outlet. Pulse bag dust collector is used for dust removal, lime gypsum method for desulfurization, and non-catalytic reduction (SNCR) denitrification. The exhaust gas is discharged through a 45m high exhaust pipe.
• Noise treatment measures:
  • Take sound insulation and vibration reduction measures for major noise equipment, and make full use of the sound insulation of the factory building. Daytime: ≤65dB(A), nighttime: ≤55dB(A). The noise during the operation period of this project mainly comes from crushers, various fans, mixers and other equipment.
  • By selecting low-noise equipment, the project reasonably optimized the layout, placed the main noise source equipment indoors, and adopted sound insulation and vibration reduction measures to reduce the impact of noise on the surrounding environment.
• ​Solid waste treatment measures:
  • Employees’ domestic waste is collected in designated trash bins and transported by sanitation trucks for proper disposal. The dust collected by the dust collector in the production workshop of this project is reused in production.
  • The construction unit will send the boiler ash and smoke collected by the dust collector to other units as road construction materials to achieve comprehensive utilization. Domestic waste and non-recyclable packaging materials generated by the project will be sent to the domestic waste landfill for disposal by the industrial park where it is located. The project uses NaOH desulfurization instead of the lime method proposed during the environmental impact assessment.
  • The sodium sulfate produced dissolves in water and no desulfurization gypsum is produced. The dust collected by the dust collector in the production workshop is reused in production. The generated cinder is sold to cement grinding stations or used as paving materials; the desulfurized gypsum is handed over to nearby environmentally friendly brick factories for brick making.