Ammonium sulphate from co-digestion of corn silage, chicken manure and other biowaste by BENAS process (ID:667)

Input material
maize silage and poultry manure
Nutrient content info

around 5% N in fresh weight

Status
Advanced development stage
Application dose
depend on the sulphur content and the crop demand
Type of farming
conventional
Keywords
ammonium sulphate
anaerobic digestion
FiberPlus
N recovery
Product description

The BENAS biogas plant uses a modified stripping process to recover the ammonium nitrogen from digestates. By adding a cheap FGD gypsum, it produces a concentrated marketable ammonium sulphate solution (25% AmS) and a solid calcium carbonate fertilizer (Lime, 70% DM). The BENAS process recovers 67% of NH4-N as AmS and 6% of NH4-N as Lime. It also reduces the greenhouse gas emissions by lowering CO2 emissions from digestate  transportation and reduce ammonia, nitrate and nitrous oxide emissions.

The produced AmS solution can be used for producing mineral fertilizer solutions or for upgrading manure or digestate low in N content. It benefits as its neutral pH is well tolerated by plants. The concentration of 25% AmS avoids evaporative crystallization, making it a suitable for direct application on crops. In order to reduce the risk of emission during application, it is recommended to apply the AmS solution via injection or immediately incorporated into soil after surface application.

Linked technology: Technology for N recovery as ammonium sulphate from co-digestion of corn silage, chicken manure and other biowaste by BENAS process (ID 668)

 

Basic information

Vendor:
  • Name: GNS – Gesellschaft für Nachhaltige Stoffnutzung mbH
  • Contact: Dr. Ute Bauermeister
  • Vendor website
    Country:
    Germany
    Product main category:
    Scrubber water and mineral nitrogen concentrates
    Product subcategory:
    Ammonium nitrate/sulphate

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