Systems and methods for producing sulfurous acid

A sulfuric acid generating system comprising:

• a primary burn chamber;
• an exhaust pipe extending from the primary burn chamber at a first end so that burned sulfur exhaust traverses the exhaust pipe from the first end to an opposite second end;
• a secondary burn chamber located between the first end and second end of the exhaust pipe;
• a primary venturi pump having a gas inlet coupled to an outlet at the second end of the exhaust pipe and having a first aqueous media inlet and having a first fluid outlet;
• a first collection tank that collects aqueous output from the first fluid outlet of the primary venturi pump, wherein the first collection tank includes a gas headspace above a liquid container, and optionally includes a first collection tank fluid outlet;
• at least a second venturi pump having a gas inlet that is fluidly coupled with the gas headspace and having a second aqueous media inlet and having a second fluid outlet;
• a fluidic recycle loop that recycles sulfurous acid from at least one of the first collection tank fluid outlet or second fluid outlet to at least one of the first aqueous media inlet or second aqueous media inlet,
• wherein the fluidic recycle loop recycles sulfurous acid to decrease pH of the sulfurous acid in each recycle.