Company Overview: This company is a modern, large-scale pig farm with over 10,000 pigs. The farm generates large amounts of pig manure, pig urine, and wastewater from washing the pens daily. Direct discharge of this high-concentration organic wastewater without treatment would cause serious pollution to the surrounding environment.

I. Challenges: The "Hard Nut" of High-Viscosity, High-Fiber Manure and Wastewater Treatment

Before introducing our Sanshine screw press, the pig farm used a traditional treatment method of "anaerobic fermentation + sedimentation." While some of the biogas slurry could be returned to the fields, the treatment of the resulting biogas residue (sludge) was a major problem:

The sludge has a complex composition and extremely high viscosity: Pig manure sludge contains a large amount of undigested feed fiber, pig hair, and colloidal organic matter, resulting in extremely high viscosity and poor flowability. This characteristic makes the sludge extremely difficult to treat.

Traditional Equipment Ineffective: The farm had tried other types of solid-liquid separation equipment, but the results were unsatisfactory. For example, ordinary screen separators are easily clogged by pig hair and long fibers; while traditional belt filter presses quickly become clogged with the filter cloth when dealing with this high-viscosity sludge, leading to a sharp drop in processing efficiency and requiring frequent washing and maintenance with significant manpower and water resources.

Disposal costs and environmental pressures coexist: Undehydrated biogas residue has a moisture content of over 97% and is bulky. Whether transported off-site or dumped on-site, it faces high transportation costs and enormous environmental pressure. Especially during the rainy season, sewage flows freely, emitting a foul odor, seriously affecting the surrounding environment and resulting in repeated warnings from environmental protection departments.

Resource waste, untapped value: This biogas residue, rich in organic matter, is an excellent raw material for producing high-quality organic fertilizer, but due to its high moisture content, it cannot be directly used in subsequent aerobic fermentation and fertilizer production processes, and this valuable resource is left idle as waste.

II. Solution: Introducing a "Clog-Free" Screw Press Sludge Dewatering Machine

To completely overcome this "hard nut to crack," the pig farm, after in-depth market research and on-site material testing, ultimately decided to introduce a screw press sludge dewatering machine specifically designed for high-difficulty sludge.

Key Advantages of Choosing our Sanshine Screw Press Machine:

Specifically for fibers and viscous sludge: The unique moving and stationary ring plate structure of our Sanshine screw press machine, driven by the screw shaft, creates minute relative movements between the ring plates, forming a dynamic "self-cleaning" process. This gives it unparalleled stability and continuity when processing materials containing pig hair, fibers, and other easily entangled and clogged materials.

Handling high-concentration sludge: Our Sanshine screw press machine eliminates the need for a sludge thickening tank, directly processing high-concentration raw sludge drawn from anaerobic fermenters or sedimentation tanks, simplifying the process and saving on infrastructure investment.

Fully automated operation, saving Labor: Farm operations are busy, and manpower is precious. Our Sanshine screw press, integrated with the dosing and feeding systems, can operate fully automatically 24 hours a day, requiring no dedicated personnel and significantly reducing labor costs and management complexity for livestock farms.

Low-speed operation, robust and durable: The equipment operates at extremely low speeds, resulting in minimal wear. Furthermore, the extensive use of 304 stainless steel effectively resists corrosion from manure, ensuring long-term stable operation.

Implementation process: Sludge from the anaerobic digester is pumped into the flocculation mixing tank of our Sanshine screw press, where it is rapidly mixed with a polymeric flocculant (PAM) to form easily dehydrated flocs. These flocs are then fed into the main body of the screw press for dewatering. The filtrate (biogas slurry) is discharged through the gaps in the moving and fixed ring plates, while the solid sludge cake (dry manure) is discharged from the end, falling directly into the collection cart below.

III. Results and Benefits: A Double Harvest of Environmental Protection and Economic Benefits

The successful application of our Sanshine screw press has brought revolutionary changes to this pig farm:

Significant Reduction in Manure and Wastewater, Fundamental Environmental Improvement:
Before Treatment: Sludge moisture content > 97%, resembling a thin sludge.
After Treatment: Dry manure moisture content stabilizes below 75%, resembling a loose solid with no dripping.
Results: Sludge volume reduction exceeds 85%. Odor and fly problems within the farm have been fundamentally solved, resulting in a completely renovated environment that fully meets environmental protection requirements.

Turning Waste into Treasure, Opening Up New Sources of Revenue:
Organic Fertilizer Production Line Established: The dehydrated manure has a suitable moisture content, making it an ideal raw material for producing commercial organic fertilizer. The farm subsequently installed an organic fertilizer production line, aerobically fermenting, granulating, and packaging the dry manure for sale, generating hundreds of thousands of yuan in additional revenue annually, successfully transforming the greatest environmental burden into a new profit growth point.

Achieving an ecological cycle: The filtrate (biogas slurry) produced during dewatering is also effectively utilized as high-quality liquid fertilizer, transported through a pipeline system to surrounding cooperative farmland for irrigation, realizing an ecological agricultural cycle of "pig-biogas-fertilizer-grain".

Significantly reduced operating costs:
Zero transportation and disposal costs: Manure no longer needs to be transported for disposal, completely saving related costs.

Reduced labor and maintenance costs: The fully automated operation mode reduces the need for at least one full-time operator, and the equipment failure rate is extremely low, making maintenance simple.

IV. Conclusion: 

This pig farm case powerfully demonstrates that the screw press sludge dewatering machine is a key core piece of equipment for manure treatment in modern large-scale farms. With its strong anti-clogging capabilities, high degree of automation, and excellent stability, it not only solves the industry pain point of traditional processes being unable to handle high-viscosity, high-fiber manure, but more importantly, it bridges the "last mile" of manure resource utilization, helping livestock enterprises fundamentally transform environmental pressure into economic benefits.

For the livestock farming industry committed to achieving green and sustainable development, our Sanshine screw press is not only an environmental protection device, but also an important "weapon" for building ecological circular agriculture and enhancing the overall competitiveness of enterprises.