Intensification of Waste Valorization Techniques for Biogas Production on the Example of Clarias gariepinus Droppings

Round 1

Reviewer 1 Report

Please improve the abstract there were quite a few typo and clarity. Perhaps have a first language English reader proof read and provide context so the meaning is not lost in the review. But the entire paper does not a proof-edit. 

Also use terms consistently.. Is it Clariid or Clary

Overall I am of the opinion that your work is very good and is needed at this time so I read it for great interest and it immediately feeds into real-life application and for this the work is to be recommended.

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Reviewer 2 Report

Rewrite the manuscript because the present form is something like a term report but not an article paper.  

1.     English polishing is very necessary. There are many redundant descriptions: such as two “accordingly” in Lines 37-39; two “implementation” in L39-40 and 462-463; two “excreted” in one sentence (L155-156); two “feces” in one sentence (L158-159)…..

2.     Fig. 1 is not necessary. Moreover, its Y-axis is not in English.

3.     Concise the section Introduction with directly showing the research motivation.

4.     Why experiments were conducted under 23°C? Why direct electric current of 2.5 A and a voltage of 12 V were used?

5.     Give the details for each reactor size (Fig. 3) and seeds.  

6.     What are hydrogen potential (pH) and hydrogen pH?

7.     Fig. 5: What did you mean for “per unit substrate” in “biogas yield”?

8.     Fig. 5 could not show the data of L372-374.

9.     How did you know the details of Fig. 6?

10.  Give a table to compare your experimental results with literature values.

11.  Section “Conclusions” was weak.

1.  

Author Response

Please see the attachment

Author Response File: Author Response.pdf