Advanced Oxidation Processes Performance for a Complex Livestock Wastewater Treatment. Emphasis on Biodegradability Enhancement
Globally, livestock activity consumes significant quantities of water per kilo of meat produced, in addition to generating large volumes of waste that could be harmful to the environment and greenhouse gases, causing a significant impact on the environment. This study analyzed representative livestock wastewater (LWW) and the performance of advanced oxidation processes (AOP) for its treatment. The experiments were conducted in a batch UV photoreactor (16 mW/m2, λ= 254 nm). The oxidizing agents (Ox) tested were H2O2 and peroxymonosulfate (PMS), each at low, medium, and high TOC/Ox molar ratios. For the dry season, a pretreatment based on chemical precipitation was implemented. In the rainy season, the LWW showed total organic carbon (TOC) values of 859 ±13.37 mg/L and 168.85 ±1.62 mg/L of total Kjeldahl nitrogen (TKN). In the dry season, also, benzimidazoles (BZ) (95.3±35.16 mg/L), Cu (4.3±0.23 mg/L), Fe (3.8±0.38 mg/L), and suspended solids (SS) (1015±586.9 mg/L) were identified. Toxicity was elucidated as LWW inhibited 96% of radicle elongation. With UV/H2O2, 14 and 39% were mineralized, proportional to Ox concentration. However, the most significant decrease in toxicity occurred with the lowest molar ratio [TOC/Ox 1:0.75. The UV/PMS process removed significantly lower TOC concentrations (P<0.05), but toxicity decreased entirely. PMS jointly produces SO4.- and •OH, whose mechanism indicates degradation to biodegradable organic compounds. The study of mineralization and biodegradability provided insight into the changes in LWW during treatment with AOP. Furthermore, it contributed to establishing the technical basis for implementing efficient treatment processes
Year of publication: |
[2023]
|
---|---|
Authors: | Ortiz-Marin, Alejandro D. ; Talavera-López, Alfonso ; Solis-Marcial, Oscar J. ; Roé-Sosa, Adriana ; Pérez-Estrada, Leonidas ; Amabilis-Sosa, Leonel E. |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by subject
-
Find similar items by using search terms and synonyms from our Thesaurus for Economics (STW).