Aqil Azizi

11 Questions 6 Answers 0 Followers

Questions related from Aqil Azizi

Is there any previous study on PAMs (Protozoa-associated methanogens) in the anaerobic digestion system?

I am wondering whether PAM is possibly present in anaerobic digestion system and might effect the overall production of biogas in the digesters

07 August 2015 3,727 1 View

How is the order of biodegradability rate among several polysaccharides from different seaweeds?

It has been reported that seaweed contain high carbohydrate and lack of lignin, which makes them much easier to digest during anaerobic digestion. I would like to know the order of...

03 April 2015 388 1 View

What if the result of bacterial community analysis from anaerobic digestion contradicts the common Anaerobic Digestion Model 1 (ADM1) assumption?

The majority of methane producer is not acetoclastic methanogen but hydrogenotropic methanogen. Does it mean something is going wrong during the anaerobic digestion? How many anaerobic digestion...

24 October 2014 2,706 6 View

Will the VFAs be converted totally into methane?

In my experiment, VFAs concentration is higher in thermophilic than in mesophilic anaerobic digestion, but the methane yield is not much different. Does the microbe use VFAs for other purpose...

08 October 2014 9,799 8 View

Is the main medium recipe between aerobic and anaerobic (e.g cellulose degrading bacteria) similar?

Is it different only from the way we prepare the medium (absent or present of oxygen)? In the case of an anaerobic medium with additional of (e.g resazurin, reducing agent ect).

05 April 2014 3,675 0 View

Has anyone ever measured carbohydrate composition of Gracillaria sp (red macroalgae) especially xylan?

Some literature say among three macrolagae (red, green and brown algae), xylan can only be found in green and red algae (Palmaria palmata). I want to know if anyone has measured xylan from other...

04 April 2014 3,700 1 View

Is it good idea to use marine sediment as inoculum in anaerobic digestion?

Is there any reason why people don't use abundant marine sediment as inoculum? Marine sediment contains high sulfate reducing bacteria (SRB) which will compete with methanogenic archae so it will...

08 November 2013 958 2 View

Do I need to use seawater for making anaerobic medium?

Typical basic anaerobic medium is freshwater with added some nutrients. But in my anaerobic digestion case, I am using seaweed as substrate and marine sediment as inoculum which both are from...

31 October 2013 311 1 View

What is the best way to know the stages of anaerobic digestion? (hydrolisis, acidogenesis, acitogenesis and methanogeneis).

I am planing to compare the microbial diversity of each stage during anaerobic digestion and also attempt to isolate microbes responsible for each stage. Is there any better way to know which...

04 October 2013 8,615 2 View

Is it possible that the value of volatile solids (VS) is higher than Total Solids (TS)?

It sounds impossible but I found an article showing that the TS/VS value is somewhere around 0 point something. Can you help?

30 September 2013 2,126 39 View

What is correlation between temperature and pH? Does high temperature tend to decrease the pH?

In thermophilic anaerobic digester, the pH is lower than mesophilic AD at the end of the culture. Is there any reason for it?

27 September 2013 8,805 30 View