Recently, some concentrated livestock farms in the province have been causing environmental pollution problems such as discharging wastewater into the environment and generating foul odors. Departments, agencies, and localities have intensified inspections, monitoring, and enforcement; and have also provided guidance on solutions to overcome this situation.
Addressing pollution
Phu Yen currently has approximately 280 pig farming establishments, including 23 concentrated farms under the provincial authority's approval of environmental impact assessment reports, 51 farms under the district authority's issuance of environmental protection commitment certificates, and the remainder being small-scale establishments in residential areas and household-scale operations.
The development of concentrated livestock farms presents an opportunity for localities to transition from small-scale to large-scale farming, utilizing modern and advanced intensive farming systems. However, in reality, these concentrated livestock farms have recently generated numerous pollution problems, such as discharging untreated wastewater into the environment and producing foul odors.
Relevant departments, agencies, and local authorities have intensified inspections and supervision of farm operations and strictly dealt with violations. However, the problem of environmental pollution has not been completely resolved, affecting the living environment and causing resentment among people near livestock farming areas.
The Department of Agriculture and Environment regularly coordinates with other departments, agencies, and localities to review and assess compliance with environmental protection laws and regulations by livestock farms and facilities. For facilities found to be in violation, in addition to administrative penalties, the Department of Agriculture and Environment and the local authorities also require them to rectify the violations and provide guidance on solutions to address environmental pollution.
Regarding the dairy farm of Phu Yen High-Tech Dairy Farm Co., Ltd. (Son Hoa district), inspections and surveys have revealed that there is still a slight, localized odor in the barn area and manure separation area within the farm premises, which does not spread to the surrounding environment.
According to Mr. Luu Hoai Nam, General Director of Phu Yen High-Tech Dairy Farm Co., Ltd., the company has implemented several solutions such as increasing the frequency of spraying biological products in areas where odors originate, covering with shade nets, and increasing the planting area to create a green belt to minimize the spread of odors into the environment. To reuse wastewater, the company's farm has been certified by the Center for Testing, Inspection, and Certification of Livestock (Department of Livestock) for the use of livestock wastewater for crops.
Regarding the pig farm of Phuc Huy Gia Lai Co., Ltd. (Son Hoa district), the company has held dialogues with local residents about the odor emanating from the farm. Following these dialogues, the company has implemented solutions to mitigate the odor, such as planting an additional 4 hectares of trees to create an odor barrier; and increasing the frequency of spraying microbial products to reduce odor during periods when residents raised concerns. However, a slight odor still persists in the area behind the exhaust fans of the pig pens and in the manure separation area, localized only within the farm premises and not spreading to the surrounding environment.
Mr. Phan Dinh Huy, Director of Phuc Huy Gia Lai One-Member Limited Company, said: The company has installed a second layer of spray nozzles after the exhaust fan to reduce odors. The business has also learned and adopted odor control methods from scientists and farms with similar operating models, and implemented solutions to minimize odors.
Investing in technology, ensuring environmental protection.
Currently, several pig farms in the province are investing in technology to treat the odor released into the environment. The CPF contract pig farm in Hon Ong village, Son Phuoc commune (Son Hoa district), which has a capacity of 6,000 fattening pigs, now only raises about 2,000-3,000. Previously, this farm also generated odors, but for the past two years, thanks to the application of the three key technologies in environmental treatment, no odors have been released into the environment.
Mr. Huynh Nhat, owner of a CPF contract pig farming facility, proposed a solution: a three-pronged technology approach including switching to low-protein animal feed; treating odors inside the pig pens before exhaust fans release them outside; and using manure separation and pressing machines. The application of low-protein feed will significantly reduce emissions. The farm has ordered probiotic preparations directly from the factory, ensuring a 100% absorption rate of probiotics in the pigs and maximizing their effectiveness.
In late 2023, CPF contract pig farming collaborated with a Japanese company to install an automated air deodorization system for the cooling system and inside the pig pens. This system utilizes activated carbon combined with biological agents for odor removal. The spraying system is programmed to operate automatically at various times throughout the day, proactively addressing odors. The activated carbon, when sprayed into the air, quickly absorbs and transforms odor-causing substances, condensing them into smaller particles. This results in cleaner air inside the pens and significantly reduces odors after exhaust fans are removed. Furthermore, the biological agents have a longer lifespan, inhibiting odor-causing bacteria.
The farm has also invested in a modern manure separator that separates 95% of the dry matter content in the manure mixture. The separated liquid is then fed into a biogas system for composting for 30-45 days. This technology reduces the amount of gas in the biogas system by 90%, thus reducing environmental emissions.
Mr. Huynh Nhat added that currently, the CPF contract pig farm produces about 500-600 kg of manure per month. This manure is provided free of charge to local people for fertilizing crops, especially sugarcane, which grows and develops very well using this fertilizer. Many sugarcane farmers in the area have registered to use it, but the supply is insufficient.
According to Mr. Vo Ngoc Thieu in Hon Ong village, Son Phuoc commune (whose house is near the CPF contract pig farm), more than two years ago, the foul odor from the CPF contract pig farm frequently spread outwards within a radius of 1-2km, polluting the environment and affecting the lives of local residents. For the past two years, the farm has managed the odor better, and the living environment of the residents has been less affected.
To minimize and reduce the characteristic odor at concentrated livestock farms in the province, in 2024, the Department of Agriculture and Environment invited a team of environmental experts in the field of livestock farming from the Vietnam Academy of Science and Technology to conduct on-site surveys at several farms.
“Through the survey, the expert team noted solutions to reduce odors at livestock farms that had previously caused environmental pollution, and also pointed out potential odor sources so that businesses could continue to implement remedial solutions. The expert team from the Vietnam Academy of Science and Technology also proposed feasible and appropriate solutions that could be applied to livestock farms in the province,” said Mr. Nguyen Thai Hoa, Deputy Director in charge of the Department of Agriculture and Environment.
The Provincial People's Committee has directed the Department of Agriculture and Environment to continue strengthening coordination with other departments, agencies, and localities in inspecting concentrated livestock farms, especially pig farms throughout the province (periodic and unscheduled inspections), in order to promptly detect and prevent environmental hotspots.
Comrade Ho Thi Nguyen Thao, Member of the Standing Committee of the Provincial Party Committee, Vice Chairman of the Provincial People's Committee |
ANH NGOC
Source: https://baophuyen.vn/82/326462/dau-tu-cong-nghe-xu-ly-moi-truong-o-cac-co-so-chan-nuoi-tap-trung.html
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