Green intelligent manufacturing and collaborative innovation
Respect for employees and harmonious coexistence
Contributing back to the society with a grateful heart
The Company has established a wastewater treatment system capable of treating 12,000 tons of wastewater (from textile printing and dyeing) every day. All the Company's wastewater discharges before making the system improvement were in line with the requirements under the "Effluent standards for pollutants from textile dyeing and finishing industry" (GB4278-2012). At present, the Company has put in place an online effluent monitoring system that is connected with provincial and municipal environmental protection departments and capable of 24/7 real-time display of all monitoring data.
The Company adopts separate collection according to wastewater concentration (COD, alkalinity) and separate treatment according to wastewater quality and classification (chromaticity, salinity, etc.) and has put in place separate collection systems, pipelines and treatment facilities.
The Company's anaerobic bioreactor (IC tower) can significantly reduce the COD value of concentrated sewage while producing biogas, which can be burned to produce steam for production activities after drying and desulfurization treatment; for the collected wastewater, in addition to recycle and reuse by ways of the three-membrane method (MBR membrane, ultrafiltration membrane, reverse osmosis membrane), electrodialysis and freezing crystallization methods are also being used to recover salt from the wastewater for production purposes.
Reuse of cooling water
The Company has installed circulating water-cooling devices at all high temperature heat sources for concentrated collection (at the capacity of 1000 tons/day) and cyclic utilization of hot water produced by various equipment (post-cropping cooling, singeing and alkaline expansion) for production purposes.
With respect to high-pressure, high-heat condensate produced by high-temperature pressure vessels, the Company uses flashing liquid injection technology to realize the separate collection of latent and sensible heat, and achieves annual recovery of more than 8,000 tons of steam and more than 9,000 tons of high-quality high-temperature hot water, all of which can be used for cyclic utilization for production purposes.
Coal to gas
In 2013, the Company dismantled all coal-fired heat-conducting oil boilers in accordance with the "coal to gas" policy, and retrofited all the equipment requiring dry heat and high temperature heat sources, so as to completely eliminate exhaust emissions from coal combustion by converting the heating source to the cleaner natural gas.
Exhaust gas treatment for high-temperature setting equipment
The Company ensures that each high-temperature setting equipment is fitted with an air collection hood (used to collect and treat exhaust gas) that features an oil fume removal rate of over 85% and a total particulate removal rate of over 90%.
Treatment of sewage waste gas
In positions such as the raw water aeration tanks and anaerobic tanks, the Company adopts the method of sealing and adding covers to collect and treat the exhaust gas in a concentrated manner, and it ensures all treated exhaust gases meet Level II requirements under the "emission standards for odor pollutants" (GB14554-1993).
2018年5月，“1400KW分布式光伏发电站”正式合闸送电。此项目实施：年发电量147万度，占美欣达纺织印染用电量的1/6；每年节约标煤490吨；每年减排CO2 1274吨；每年减排SO2 11.8吨；每年减排氮氧化物3.42吨。
Photovoltaic power station
In May 2018, the Company's "1400KW distributed photovoltaic power station" was officially put into use. This power station can generate 1.47 million kWh of power every year, accounting for 1/6 of the annual electricity consumption by Mizuda for textile printing and dyeing, therefore reducing the Company's annual coal consumption by 490 tons, annual CO2 emission by 1274 tons; annual SO2 emission by 11.8 tons; annual nitrogen oxide emission by 3.42 tons.
Utilization of mercerized waste alkali according to quality
For the printing and dyeing industry, treatment of mercerized waste alkali has been a difficult issue. The Company uses a membrane treatment system to filter mercerized waste alkali and produces commercial alkali products by dissolving caustic soda flakes with light alkali obtained through filtering; it also produces diluent for the mercerizing works by mixing said light alkali with strong alkali, so as to reduce waste alkali expansion volume by more than 70%, which helps reduce the use of water, electricity and steam by a significant amount and alleviate the pressure on wastewater treatment facilities.
As the first “Made in China 2025” pilot demonstration city that promotes green smart manufacturing as its main development focus, Huzhou City has been further promoting the development of green industry. Being in a good external environment, Mizuda has made outstanding performance in various fields including "green smart manufacturing transformation and upgrading", by which it was rated as a "National Green Factory" in February 2018 and as a "National Green Supply Chain Demonstration Enterprise" in September 2019.
Company has formulated relevant short-term, medium-term and long-term strategic plans for establishing a "green innovation management system", and dedicated itself to continue to build and improve its brand image of "green factory, green supply chain management and green product design" while establishing itself as a green manufacturing enterprise.