I assume you are talking about hydrogen sulfide. To my knowledge, putrification which creates H2S results from not having enough detrivores moving through the system. I don't think a DSB consumes sulfide, but is rather key in prevent it from occurring when properly set up.
Dead wrong my friend. In a DSB
thier is a carbon cycle, a nitrogen cycle and a sulfur cycle. In the sulphur zone no critters exist beyond bacteria. This is the way it works.
aerobes predominate initially, because oxygen inhibits nitrate and sulfate reduction. This means that the presence of oxygen will not allow the reduction of Nitrate or sulfate, thus your areobic zone
facultative anaerobes begin to predominate as oxygen concentration decreases. Facultative are bacteria that can fix both oxygen and nitrate. This this the begining of the anerobic zone. Critter in this zone are only the worms mentioned above, and the occantional visitor.
Anaerobes predominate when oxygen is exhausted and fermentation products (hydrogen, organic acids) accumulate. Now we are in the anoxic zone. Through the fermentation of hydrogen and organic acids it crerates its own anoxic zone. No critters with the excetion again of the worm, passing through.
Right behind these bacteria are the iron or manganese reducers (Shewanella) predominate at first. then behind them are the nitrate reducers (Pseudomonas, etc.). behind them comes sulfate reducers (Desulfovibrio, etc.) , because they compete better for hydrogen than methanogens (but only if the sulfate concentration is high) and then finally carbon dioxide reducers (methanogens) , after the sulfate supply is exhausted.
This is the cycle that is created in a DSB
, this is the cycle that is created in the wild. You have to understand that nothing goes away, As Keven said it is merely chemically altered to another form. Ie. A chunk of food hits the sand bed. If critters such as pods
, worms and such comsume it they will take out about 10% of the matter and poop out 90%, But then in turn will also poop out its own form of Poo. Ok so the critters are thier for 2 reasons One to stir The AREOBIC zone and to process the Poo to small more accesable particuls for bacteria. Now this is where the process of reduction start. The waste is in the form of Ammonia, the first form of bacteria to have access to it only want a small portion of it, they remove protons and electrons in order to give themselves the energy they need to live. What is left is a chemical make up we call nitrite. Next steps up another form of bacteris that will once again chemically alter the formula to what we call Nitrate. The above process occurs in the Oxygenated zone. Next comes the anerobic zone. The bacteria here can live in oxygenated water or no oxygen water. When in the oxygenated water it will fix oxygen for energy, when the oxygen is depleted they now can fix nitrates for their energy source, a byproduct of this is nitrogen gas (the little bubbles you see in your bed). thats your nitrogen cycle.
A sulphur cycle also starts in your areobic zone. Bacteria such as Beggiatoa, Sulfolobus, Thiobacillus and Thiothrix but this is mostly an oxidizing process because of the presence of oxygen. Most of the altering or reducing occur once again in the anerobic zone. This cycle works the same way as the nitrogen cycle. One bacteria altering the compound to another, then off gassing. Your tank is bacteria driven, the bugs do nothing more then to move sand and chew down the poo.
What I find funny is that you say it is not proven because no one has starred at a hobbist tank and done the study. Even though it has been studied to death in the wild and in labs and is common proof. Its like saying that even though a crash test dummy was mangled in an accident I wont believe it unless I see it in my car???
You say you dont want to know about marine biology, well enough said then, Marine biology is what makes it possible to keep a reef tank if you dont want to know how it works, then this conversation is truly pointless and we can all wait for the next fad to come out.