Synchronous COD removal and nitrogen recovery from high concentrated pharmaceutical wastewater by an integrated chemo-biocatalytic reactor systems.

Autor: P M; Environmental Engineering Department, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India. Electronic address: maharaja@clri.res.in., A M; Environmental Science Lab, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India., K PM; Environmental Science Lab, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India., Sekar K; Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India., S S; Environmental Science Lab, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India., Srinivasan SV; Environmental Engineering Department, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India., K SB; Environmental Engineering Department, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India., G S; Environmental Science Lab, Council of Scientific & Industrial Research (CSIR) Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India; SRMIST, Deemed University, Ramapuram Campus, Chennai, 600089, Tamil Nadu, India.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2023 Mar 01; Vol. 329, pp. 117048. Date of Electronic Publication: 2022 Dec 19.
DOI: 10.1016/j.jenvman.2022.117048
Abstrakt: Present report, an investigation of highly concentrated and low bio-degradable pharmaceutical wastewater (HCPWW) treatment; simultaneously ammoniacal nitrogen recovery for struvite fertilizer. The use of multiple solvents and many formulation processes in HCPWW, resulting highly refractory chemicals. Here, in this study focused on evaluation of chemo-biocatalysts for the removal of refractory organics, nitrogen recovery from HCPWW. The initial organics, and nitrogen content in HCPWW was 20,753 ± 4606 mg/L; BOD, 6550 ± 1500 mg/L and NH 4 + -N, 1057.9 ± 185.8 mg/L. Initially, the biodegradability (BOD 5 : COD ratio from 0.32 to 0.45) of HCPWW, which was improved by heterogeneous Fenton oxidation (HFO) processes, and porous carbon (PCC, 30 g/L), along with FeSO 4 .7H 2 O, 200 mg/L and H 2 O 2 (30% v/v), 0.4 ml/L were used as a catalyst in a weakly acidic medium. For the biocatalytic processes, the microbial culture cultivated from sewage and incorporated into a Fluidized Immobilized Carbon Catalytic Oxidation reactor (FICCO), and dominant species are Pseudomonas Putida sp., Pseudomonas Kilionesis sp., and Pseudomonas Japonica sp., which is identified by using 16 S rDNA sequencing analysis. The COD and BOD 5 removal efficiency of 65-93% and 70-82%, and follow the pseudo-second-order kinetic model with the rate constants of 1.0 × 10 -4  L COD -1 h -1 , 1.5 × 10 -3  L COD -1 h -1 and 3.0 × 10 -3  L COD -1 h -1 in the HFO-FICCO-CAACO catalytic processes. The optimized hydraulic retention time (HRT) of FICCO reactor was 24 h, and 1 h for the Chemo-Autotrophic Activated Carbon Oxidation (CAACO) reactor for maximum organics removal. MAP (Magnesium Ammonium Phosphate precipitation) process showed 90% of NH 4 + -N elimination and recovered it as a struvite fertilizer at an optimum molar ratio of 1:1.3:1.3 (NH 4 + -N: Na 2 HPO 4 .2H 2 O: MgO). FT-IR, UV-visible, and UV-fluorescence data confirm the effective elimination of organics. Hence, this integrated treatment system is appropriate for the management of pharmaceutical wastewater especially elimination of complex organic molecules and the recovery of nitrogen in the wastewater.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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