Cut Wastewater Costs with Anaerobic Digestion: Proven Wastewater Treatment Solutions
Global livestock inventories such as swine remain stable. The US has developed technical models represented by integrated crop-livestock systems with on-field application and Comprehensive Nutrient Management Plans; Denmark, the Netherlands, and others have developed centralized biogas projects with digestate application systems. China's large-scale farms still have considerable room for improvement in supporting biogas project coverage, and digestate resource utilization rates lag behind advanced European levels. Greenhouse gas emissions from livestock account for a significant proportion of total global anthropogenic emissions, making manure management a critical battleground for agricultural carbon reduction. Latin American countries started later in manure management but are accelerating relevant infrastructure development.
This uneven regional progress explains why demand for reliable Wastewater Treatment Solutions continues to rise worldwide. At the core of these solutions lies Anaerobic Digestion, a biological process that converts organic matter into biogas while simultaneously reducing pollutant loads.
What Is the USR Process?
USR, or Upflow Solids Reactor, is an upflow anaerobic process modified for high-suspended-solids, high-solids organic wastewater, specifically designed to solve problems of clogging, sludge washout, and uneven reaction common in traditional anaerobic processes for high-solids wastewater. The process eliminates complex three-phase separators, simplifies internal structure, and relies on upflow hydraulics to promote thorough mixing of solid materials and anaerobic sludge. No strict granular sludge formation conditions are required-flocculent sludge can operate stably. The key feature is high solids tolerance and impurity resistance, with very high influent suspended solids tolerance. It is a dedicated high-efficiency anaerobic process for livestock manure, agricultural organic waste, and high-solids livestock wastewater, specifically developed for agricultural and environmental applications.
Where Livestock Wastewater Comes From
Livestock wastewater is the core agricultural pollution wastewater from large-scale poultry, livestock, and aquaculture operations, generated primarily during farming operations and facility cleaning. Poultry and livestock wastewater is the main component, including wash water from pig, cattle, and poultry housing, manure and urine seepage, and facility washdown-rich in livestock metabolic residues. Aquaculture wastewater comes from periodic pond water exchange and pond cleaning, with feed residues and metabolic waste as pollutants. Wastewater is primarily generated in peri-urban and rural farming areas. Small-scale farmers lack adequate collection facilities, with wastewater discharged directly to land and water. Large-scale farms have collection systems for centralized treatment, with water reuse and resource recovery becoming standard practice.
Understanding these sources is essential when designing effective Wastewater Treatment Solutions tailored to each farm profile.
Proven Case: Bangladesh Large-Scale Poultry Farm Manure Resource Recovery Project
Targeting local poultry farm manure resource recovery with daily treatment of 47 tons. Influent COD, BOD, SS as high as 50,000 mg/L, 25,000 mg/L, 50,000 mg/L-after CSTR + UASB anaerobic treatment, all three parameters reduced to below 200 mg/L, 100 mg/L, and 100 mg/L-effluent compliant with local environmental discharge standards. Project produces approximately 4,900 m³ biogas daily-each m³ biogas can generate 2 kWh of electricity, with daily power generation of 9,800 kWh-simultaneously achieving pollutant reduction and clean energy recovery. This is a benchmark project for livestock waste recycling in Southeast Asia.
Table 1: Bangladesh Poultry Farm Project Treatment Performance
| Parameter | Influent (mg/L) | Effluent (mg/L) | Removal Rate |
| COD | 50,000 | <200 | >99.6% |
| BOD | 25,000 | <100 | >99.6% |
| SS | 50,000 | <100 | >99.8% |
Table 2: Biogas and Energy Recovery Output
| Metric | Value |
| Daily Treatment Capacity | 47 tons |
| Daily Biogas Production | 4,900 m³ |
| Electricity per m³ Biogas | 2 kWh |
| Daily Power Generation | 9,800 kWh |
Center Enamel Professional Construction Team Manpower Reserve
Center Enamel has established its own domestic and international certified construction teams, with regular practical training on GFS tank installation and overseas construction standards for various countries. Domestically, regional construction teams cover multiple zones, capable of simultaneously deploying multiple teams for large tank farm projects. Internationally, cross-border professional installation teams are equipped to various country construction standards-sufficient manpower reserves ensure uninterrupted construction delivery for remote African sites, high-standard European/American facilities, and other projects.
Center Enamel R&D Team
Center Enamel has built a full-chain professional team covering R&D, design, marketing, installation, and after-sales. The R&D team is led by national-level materials technology experts, specializing in enamel frit and tank anti-corrosion core technologies. External senior environmental engineering and mechanical structure engineers are retained to strengthen R&D capabilities, focusing on anti-corrosion coating formulations, specialty corrosion-resistant tanks, and anaerobic supporting integrated equipment-continuously breaking through industry technological barriers.
The team operates through proprietary laboratories with external university research collaboration-conducting year-round new material and new process durability pilot testing and long-term corrosion simulation testing. This specialized R&D capability directly supports the advancement of Anaerobic Digestion systems and next-generation Wastewater Treatment Solutions.
Aluminum Geodesic Dome Roof
Aluminum Geodesic Dome Roof independently developed by Center Enamel is manufactured using high-strength aluminum alloy plates through integral stamping. It features a triangular grid spherical self-supporting structure, enabling large-span full coverage without internal support columns. Made of aluminum alloy, the roof offers excellent weather resistance and corrosion resistance, capable of long-term protection against acid rain, salt spray, and UV radiation, suitable for various extreme outdoor climate conditions.
The structural design complies with international AWWA D108 standards, with aluminum plate thickness, rib cross-sections, and joint connections all verified by finite element stress analysis, ensuring wind and snow load resistance that meets building code requirements across different global regions. The weight of the Aluminum Geodesic Dome Roof is only one-third to one-half of a steel roof with the same span, significantly reducing the load on the tank top and allowing direct installation without tank wall reinforcement.
The roof provides superior overall sealing performance, with double sealing between panels using specialized sealant strips and mechanical interlocking, enabling both airtight gas storage and enclosed odor control, suitable for biogas collection and storage, wastewater tank odor control, and drinking water contamination prevention. The support-column-free design does not interfere with the installation and operation of internal equipment such as mixers and water distributors. The aluminum material does not support microbial growth, requiring no anti-corrosion maintenance over long-term use, resulting in low total life-cycle costs.
Looking for a reliable partner for your next anaerobic digestion project? Contact Center Enamel today for a tailored wastewater treatment solution that matches your scale and regional requirements.
Our team is ready to support your project from design to commissioning-reach out now to discuss how we can turn your waste into value.
Frequently Asked Questions
What is anaerobic digestion in wastewater treatment?
Anaerobic digestion is a biological process where microorganisms break down organic matter without oxygen, producing biogas and reducing pollutants. It is ideal for high-solids livestock wastewater.
Why choose the USR Process over traditional anaerobic systems?
The USR Process tolerates high suspended solids, prevents clogging and sludge washout, and operates stably with flocculent sludge-no granular sludge formation required.
What wastewater treatment solutions does Center Enamel provide?
Center Enamel delivers EPC services for livestock, industrial, and municipal wastewater, with 2,000+ wastewater projects and 1,000+ biogas projects worldwide.