Why total solids, volatile solids, carbon and nitrogen of rice straw increase after alkaline pretreatment?

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C.A. (Kees) Kan

Did you calculate all contents on a dry matter basis? If not that might be the cause.

Muhammad Junaid Khalid

Yes, I calculate all contents on dry matter basis.

Perhaps the pretreatment does liberate components not liberated by your analytical method.

Tamer YA Fahmy

The below mentioned researcher has many articles on rice straw. Happy new year.

https://www.researchgate.net/profile/Yehia_Fahmy