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Livestock Wastewater

BKT's Customizable Solutions for livestock wastewater treatment are a well assorted package of technologies that meet various customer needs under different situations. Environmental and economical concerns are the most important factors when considering the implementation of an advanced wastewater treatment system.

After consideration of the seven factors below, if the environmental capacity is satisfied for recycling livestock wastewater, there is the option of a zero discharge system, which is inclusive of fertilizer production, biogas generation, and water reuse. If the environmental capacity cannot support fertilizer production from livestock wastewater, our client needs to treat their wastewater in order to meet the discharge limit. 

  • Local environmental regulations
  • Clients' specific demands
  • Governmental policy
  • Type of crops
  • Soil condition and topography
  • Climate
  • Health and sanitation concerns

Nitrogen & Methane Emission Reduction


In September 2016, California governor Jerry Brown signed legislation which regulated heat trapping gases at livestock operations and landfills. The new law required reduction in methane emissions on dairy farms and livestock treatment operations to less than 40 percent by 2030 (Source: California targets cow gas, belching and manure as part of global warming fight - Los Angeles Times, Nov. 29, 2016). 


Methane emission is mainly from lagoon that stores livestock wastewater and manure (80% of total methane emission).

Solutions & advantages

  • Tomorrow Water proposes a high efficient micro bubble DAF(VAF) system with a patent pending SBR system to remove more than 90% of volatile solids (VS), whereas anaerobic digestion can reduce only 50% of volatile solids. Tomorrow Water’s DAF(VAF) system has 30% higher efficiency in removing suspended volatile solid than other conventional DAF system
  • Tomorrow Water's SBR system can remove dissolved volatile solid in the effluent of DAF system efficiently.
  • Combined, Tomorrow Water’s process can remove over 90% of volatile solids, achieving the methane gas reduction goal successfully.
  • Nutrient recovery using BKT’s DAF (VAF) system is a bonus.

Two Designs

New Facilities

Retrofitting existing facilities

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Phosphorus Removal from Hog Manure (cooper farm)

Client: Commercial Hog Farm, U.S.A.
Goal: Remove phosphorus containing solids from stored hog manure
Membrane: UF
Average Flux: 45  liter / (m2 • hr)  [26 GFD]
Note: FMX influent TS of 4.0%, end material TS of 16%

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Stored Manure: Feed (left) and Filtrate (right)

Stored Manure: Feed (left) and Filtrate (right)

Hog Manure Treatment (ringler Farm)

Client: Commercial Hog Farm, U.S.A.
Goal: Treatment of hog manure
          Reduce the volume of hog manure waste and send the concentrate to an anaerobic digester
Membrane: UF
Average Flux: 24.5  liter / (m2 • hr)  [14.4 GFD]
Note: Pretreatment process included a 400 micron vibrating screen followed by 890 micron screw press

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Anaerobic digestate treatment: Raw digestate (left), filtrate (center), and concentrate (right)

Anaerobic digestate treatment: Raw digestate (left), filtrate (center), and concentrate (right)