Correction: Bakari et al. Fe0-Supported Anaerobic Digestion for Organics and Nutrients Removal from Domestic Sewage. Water 2022, 14, 1623

Omari Bakari; Karoli N. Njau; Chicgoua Noubactep

doi:10.3390/w14132075

,

and

¹

School of Materials, Energy, Water and Environmental Sciences, Nelson Mandela African Institution of Science and Technology (NM-AIST), Arusha 23311, Tanzania

²

Centre for Modern Indian Studies (CeMIS), University of Göttingen, Waldweg 26, D-37073 Göttingen, Germany

³

School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing 211100, China

⁴

Faculty of Science and Technology, Campus of Banekane, Université des Montagnes, Bangangté P.O. Box 208, Cameroon

Water2022, 14(13), 2075;https://doi.org/10.3390/w14132075

This article belongs to the Section Wastewater Treatment and Reuse

Version Notes

Order Reprints

There were some errors in the original publication [1].

(a) In the 7th row of the Abstract, the two closing brackets and full stop are missing after the NO₃⁻.

(b) In Equation (2), “OH” is not charge-balanced. It should be:

{Fe}^{0} {+ 2 H}_{2} O \to H_{2} {+ Fe}^{2 +} {+ 2 OH}^{-}

(2)

(c) Equation (4) is missing an arrow on which the pK value should be inserted. It should be:

1.6 {Fe}^{3 +} + H_{2} {PO}_{4}^{-} + 3.8 {OH}^{-} \overset{pK = 67.2}{\to} {Fe}_{1.6} H_{2} {PO}_{4} {(OH)}_{3.8} ↓

(4)

(d) In Equation (5), Fe⁰ was mistakenly written as Fe(0). It should be:

{4 Fe}^{0} {+ NO}_{3}^{-} {+ 7 H}_{2} O \to {4 Fe}^{2 +} {+ NH}_{4}^{+} {+ 10 OH}^{-}

(5)

(e) In Equation (6), “OH” is not charge-balanced. It should be:

{2 NO}_{3}^{-} {+ 5 H}_{2} \to N_{2} {+ 4 H}_{2} {O + 2 OH}^{-}

(6)

(f) In the last paragraph of Section 3.3, the second sentence should be completed as:

The suitable pH range for anaerobic wastewater treatment is 6.5 to 7.8, and above the pH of 8.5, ammonia toxicity to the methanogens begins [61,64].

(g) In Table 4, the units in column 4 (upper limit) should be the same as that in column 3 (lower limit). The corrected Table 4 appears below.

Table 4. Set of constraints for optimisation of the objective function.

(h) In the Conclusions section, there is an extra bracket after the words “System IV” and should be deleted.

The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.

Reference

Bakari, O.; Njau, K.N.; Noubactep, C. Fe⁰-Supported Anaerobic Digestion for Organics and Nutrients Removal from Domestic Sewage. Water 2022, 14, 1623. [Google Scholar] [CrossRef]

Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

Name	Goal	Lower Limit	Upper Limit	Lower Weight	Upper Weight	Importance
A: Time	is in range	0 days	76 days	1	1	3
B: Fe⁰ Dosage	is in range	0 g Fe⁰/L	30 g Fe⁰/L	1	1	3
COD	minimise	48 mg COD/L	408 mg COD/L	1	1	3
PO₄ ⁻³	minimise	0.3 mg PO₄³⁻/L	26.2 mg PO₄³⁻/L	1	1	3
NO₃⁻ + NH₄⁺	minimise	43.8 mg NO₃⁻ + NH₄⁺/L	105.2 mg NO₃⁻ + NH₄⁺/L	1	1	3

Correction: Bakari et al. Fe⁰-Supported Anaerobic Digestion for Organics and Nutrients Removal from Domestic Sewage. Water 2022, 14, 1623

Reference

Article Metrics

Citations

Article Access Statistics