What is the ruling of Biogas (which is extracted from 'Najas') for cooking. is the smoke of the 'Najas' is Najas?

In the name of Allāh, Most Gracious, Most Merciful

Assalāmu ῾alaykum wa Rahmatullāhi Wabarakātuh

It will be permissible to use biogas for cooking purposes. The gas is only being used as an implement to cook, not as an ingredient in the food itself. The smoke which eminates will not effect the food whatsoever.

الْعُسْرُ وَعُمُومُ الْبَلْوَى .

وَغُبَارُ السِّرْجِينِ وَنَحْوِهِ وَقَلِيلُ الدُّخَانِ أَوْ الشَّعْرِ النَّجِسِ ، وَمَنْفَذُ الْحَيَوَانِ . وَمِنْ ثَمَّ لَا يُعْفَى عَنْ مَنْفَذِ الْآدَمِيّ ، لِإِمْكَانِ صَوْنِهِ عَنْ الْمَاءِ وَنَحْوِهِ ، وَرَوْثِ مَا نَشْؤُهُ فِي الْمَاءِ وَالْمَائِع ، وَمَا فِي جَوْفِ السَّمَكِ الصِّغَارِ عَلَى وَجْهٍ اخْتَارَهُ الرُّويَانِيُّ

ومن ذلك قولنا: بأن النار مطهرة للروث والعذرةِ فقلنا بطهارة رمادهما تيسيراً وألا لزمت نجاسة الخبزفي غالب الأمصار

 (Al Ashbaah Wannadhaair P-85 Darul Fikr)

 (Bahishti Zewar P-45 Zam Zam Publishers)

And Allāh Ta῾āla Knows Best

Wassalāmu ῾alaykum 

Ml. Ebrahim Desai,
Student Dārul Iftā

Checked and Approved by:

Mufti Ebrahim Desai
Dārul Iftā