AI Article Synopsis

  • Livestock wastewater poses significant environmental challenges, necessitating effective treatment methods that also utilize livestock solid waste.
  • Fresh biochar struggles to adsorb phosphate due to its negative charge, but optimizing the mixture of biochar created at 400 °C and 700 °C has led to improved recovery rates of ammonium and phosphate without needing additional modifications.
  • The mixed biochar PM 4-7 demonstrated a maximum removal rate of 33.88% for phosphate and 41.50% for ammonium, proving its potential as a slow-release fertilizer while promoting seed germination and enhancing nutrient recovery from livestock wastewater.

Article Abstract

Livestock wastewater has led to serious eco-environmental issues. To effectively treat livestock wastewater and realize the resource utilization of livestock solid waste, manure waste has been widely used to prepare biochar for the recovery of nitrogen and phosphorus. However, fresh biochar has a poor ability to adsorb phosphate due to its negative charge. To overcome the defect, the proportion of biochar samples prepared at 400 °C and 700 °C was optimized under a mass ratio of 2:3 to obtain mixed biochar PM 4-7, achieving the purpose of enhanced ammonium and phosphate recovery in livestock wastewater simultaneously without any modification. The effects of pyrolysis temperature, dosage, and pH were studied, different adsorption models were used to explore the adsorption mechanism, and the effect of biochar loaded with nutrient elements on seed was verified through a seed germination experiment. It was revealed that the maximum removal rates of phosphate and ammonium were 33.88 % and 41.50 %, respectively, endorsing that mixed biochar PM 4-7 can recover nutrients from livestock wastewater, and could be used as a slow-release fertilizer to promote seed germination and growth. This method provides a new potential way for the efficient resource utilization of pig manure and the recovery of nutrients from breeding wastewater.

Download full-text PDF

Source
http://dx.doi.org/10.1007/s11356-023-28092-wDOI Listing

Publication Analysis

Top Keywords

livestock wastewater
20
ammonium phosphate
8
recovery livestock
8
resource utilization
8
mixed biochar
8
biochar 4-7
8
seed germination
8
biochar
7
livestock
6
wastewater
6

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!