Membrane-Based Operations in the Fruit Juice Processing Industry: A Review
Round 1
Reviewer 1 Report
BEVERAGES-712878
Title: Membrane-based operations in fruit juice processing industry. A review.
Undoubtedly, this is a well written and an interesting review for Beverages journal.
This review shows complete and valuable information regarding membrane technologies for juice processing.
Minor and editing comments.
Line 32. Please include reference
Line 62. Please include reference
Line 74-77. Some discussion about membranes charge properties could be included, such as ion-exchange resin treatments.
Line 382. Revise reference citation (Jiao 2004). Numbering in brackets
Please revise sections numbering (2.2, 3.3).
Author Response
Undoubtedly, this is a well written and an interesting review for Beverages journal.
This review shows complete and valuable information regarding membrane technologies for juice processing.
Minor and editing comments.
Line 32. Please include reference
A reference has been included.
Line 62. Please include reference
A reference has been included.
Line 74-77. Some discussion about membranes charge properties could be included, such as ion-exchange resin treatments.
Some new sentences related to the charge effect of membranes - especially NF membranes - have been included in subsection 2.1. Two new references have been also included at this purpose.
Line 382. Revise reference citation (Jiao 2004). Numbering in brackets
The reference has been numbered.
Please revise sections numbering (2.2, 3.3).
Paragraphs and subparagraphs have been renumbered.
Reviewer 2 Report
The review publication is well written. The cited publications are thoroughly and critically discussed. The work can be published in the form presented.
Author Response
The review publication is well written. The cited publications are thoroughly and critically discussed. The work can be published in the form presented.
Reviewer 3 Report
The manuscript presents the review abut membrane-based operations in the fruit juice processing industry. In the presented version, not enough attention is part of the industrial part. There are general descriptions of the processes and discussion of the data from the scientific literature. The more critical discussion should be present not only a description of the work of others. An important issue is a fact that the selected articles are quite old. There are many very new papers on this topic. The authors should improve significantly on this point. Furthermore, if the industrial processes are taken into account the economic evaluation should be considered as well. Which process is the most economically friendly, what is the energy consumption? Considering processes it should be mentioned that there are available osmotic distillation as well as osmotic membrane distillation. In the presented and described processes, the problem of fouling is quite important. The authors mentioned already this point in a few places. But maybe it will be good to make a separate section due to the importance of the process performance, particularly in treatment of fruit juices.
Author Response
The manuscript presents the review abut membrane-based operations in the fruit juice processing industry. In the presented version, not enough attention is part of the industrial part. There are general descriptions of the processes and discussion of the data from the scientific literature. The more critical discussion should be present not only a description of the work of others. An important issue is a fact that the selected articles are quite old. There are many very new papers on this topic. The authors should improve significantly on this point. Furthermore, if the industrial processes are taken into account the economic evaluation should be considered as well. Which process is the most economically friendly, what is the energy consumption? Considering processes it should be mentioned that there are available osmotic distillation as well as osmotic membrane distillation. In the presented and described processes, the problem of fouling is quite important. The authors mentioned already this point in a few places. But maybe it will be good to make a separate section due to the importance of the process performance, particularly in treatment of fruit juices.
The manuscript has been thoroughly revised taking into account the suggestions and comments of the Reviewer. In particular, new and recent references have been included in the manuscript (more than 50). New sentences have been included about the economic evaluation of some processes, specifically for concentration by RO and OD. A new Table (Table 4) related to the economic analyses of pomegranate juice concentration by OD and thermal evaporation has been included.
Osmotic membrane distillation has been considered as new subparagraph (5.5.) unlike osmotic distillation.
Membrane fouling has been extensively treated as new subparagraph within the section of fruit juice clarification. New references and new figures have been included at this purpose.
Reviewer 4 Report
General Comments
The aim of this paper is to provide an overview of the recent developments of membrane operations in the clarification, concentration and recovery of aroma compounds in fruit juice processing.
The manuscript entitled “Membrane-based operations in fruit juice processing industry. A review” is well written. However, in my opinion, some parts of the manuscript lack key information of process.
Some specific comments that may be useful while preparing the improved version of the manuscript :
Line 70-96. Does each paragraph refer to reference no 7?
Line 97-124. There is no references. Is it ok? Please explain it.
Line 129-150. There is no references.
Line 387. In my opinion, there is no information about the possible level of juice concentration received of this method.
Line 445-450. There is no information about the total soluble solids (Brix) of juices.
Line 470. In my opinion, section 4.3 is very well written and it should be the formula for the other sections.
Line 537-547. There is no information about the temperature of juice, which affects the viscosity of the juice.
In general, the manuscript requires minor editing.
Author Response
The aim of this paper is to provide an overview of the recent developments of membrane operations in the clarification, concentration and recovery of aroma compounds in fruit juice processing.
The manuscript entitled “Membrane-based operations in fruit juice processing industry. A review” is well written. However, in my opinion, some parts of the manuscript lack key information of process.
Some specific comments that may be useful while preparing the improved version of the manuscript :
Line 70-96. Does each paragraph refer to reference no 7?
Specific references have been included.
Line 97-124. There is no references. Is it ok? Please explain it.
Specific references have been included.
Line 129-150. There is no references.
References have been included.
Line 387. In my opinion, there is no information about the possible level of juice concentration received of this method.
The concentration degree and the volume concentration ratio (VCR), where available, has been included.
Line 445-450. There is no information about the total soluble solids (Brix) of juices.
The total soluble solids of both single-strength and concentrated juice has been included.
Line 470. In my opinion, section 4.3 is very well written and it should be the formula for the other sections.
Thank you for this suggestion. We have modified some parts of other sections accordingly.
Line 537-547. There is no information about the temperature of juice, which affects the viscosity of the juice.
The temperature of juice (25 °C) has been included.
In general, the manuscript requires minor editing.
Round 2
Reviewer 3 Report
The manuscript has been corrected and improved. All comments were taken into account. The work is ready to be published.
