Progress in Multi-Soil-Layering Systems for Wastewater Treatment

Round 1

Reviewer 1 Report

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Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

In this manuscript, authors reviewed recent progress on MSL systems and its applications for wastewater treatment. The mechanisms of MSL technology was well demonstrated, and the strategies for MSL system optimization were summarized. This topic is of significant importance to researchers in the relevant fields, and the manuscript is excellently crafted with a comprehensive structure. However, the language is somewhat ponderous, and it would benefit from a refinement of the English. Overall, it is a good manuscript, and I suggest it undergoes a minor revision.

Some concerns are as follows:

Line 182: MC-LR, what does LR mean? Please provide its whole name.

Line 218-219: "Landfill leachate ... is not suitable for a traditional WWTP." However, the most common way to treat landfill leachate is to transport the leachate to WWTP. it is recommended to revise this sentence.

Line 239-245: Do you have some recommended parameters for the size of the SMBs?

Line 469-470: "Some scholars have integrated MSL systems with filters to improve the operating cost and pollutant removal performance". I think it should be revised to "Some scholars have integrated MSL systems with filters to reduce the operating cost and improve pollutant removal performance."

Line 36: There should be a space between “operations” and “[”. There are same problems in the text such as line 71, 130, and 132. Please check throughout the entire text.

Line 145: please check the unit of HLR, and check the units throughout the entire text.

Line 169: please check the expression of phosphorus.

Line 186: It seems there is an extra space between “[40]” and “endeavored”.

The references of the manuscript should be carefully revised.

Moderate editing of English language required.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

This paper focuses on the main directions and application prospects of multi-soil-layering systems (MSL) in recent years, as well as describing the different components of MSL systems and the factors affecting performance, but there are still some problems in the article, so it needs to be revised before publication.

1.     The content of lines 107-116 and 117-126 of the article is duplicated, check and revise.

2.     Some new wastewater treatment references should be added and compared, such as Chemical Engineering Journal 484 (2024) 149604; Surfaces and Interfaces 43 (2023) 103548

3.     Please check line 165 of the article for missing punctuation.

4.     There are Chinese characters in line 239 of the article, please check and modify.

5.     The article describes that the shape and size of the SMB can have an impact on the MSL system and that thinner SMBs are favorable for MSL system performance, please briefly describe whether narrower SMBs are better.

6.     Carbon source is an important component of SMB, and replacing the traditional carbon source with a new one is beneficial to increase the performance of the MSL system, but does it involve the issue of higher cost.

7.     The article before and after the description of the logic needs to be enhanced, pay attention to the context of the link, such as when describing the treatment of different types of sewage, should pay attention to the common points of different treatment methods or sewage, in order to achieve the purpose of the article line coherent.

8.     Check article tenses for consistency.

8.     Check article tenses for consistency.

Author Response

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Author Response File: Author Response.pdf

Reviewer 4 Report

Dear authors, the study is interesting, however some improvements are required before publications:

Line145. please explain the abbreviation HLR

Line 169: please correct: phosphorus (PO4-P)

line 182 please explain the abbreviation MC-LR;

In my opinion, the manuscript are used too many abbreviations, some of which are not explained, make it difficult to understand and follow the study.

I suggest the introduction of a comparative data regarding the alternative techniques, advantages and disadvantages of each of them.

Author Response

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Author Response File: Author Response.pdf

Reviewer 5 Report

In my opinion, the topic (subject) of this review article is very important in the context of environmental protection. Therefore, the manuscript should be published, however, before the acceptance of the article some corrections.

1. Thoroughly check the abbreviations if they are mentioned for the first time put their meaning, or if they were already mentioned use their abbreviation.

2. If it is convenient, use a list of all abbreviations and their meaning. 

3. Please all tables or figures will be mentioned in the written document and at the end of it, if abbreviations are used, put their meaning.

4. It is not necessary to include quotations in the conclusion, since it is the personal opinion of the authors and what they have found in their work.

5. check line 239.

6. it would be convenient to use a table to put the advantages and disadvantages of the use of MSL with the use of different types of wastewater. 

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Thanks to the authors for finalizing the manuscript. Its quality has increased significantly and it can be published

Good

Reviewer 3 Report

accepted

accepted

Reviewer 4 Report

Accept with the revised manuscript.