Nitrocellulose wastewater treatment system and method

The invention discloses a nitrocellulose wastewater treatment system and a wastewater treatment method. According to the invention, after nitrocellulose wastewater is collected, lime is added to neutralize the nitrocellulose wastewater to a pH value of 2-4, and the treated wastewater enters a sedimentation tank to precipitate calcium sulfate sludge; a supernatant and return sludge of a biochemicalsystem are mixed and then enter an adsorption tank, and calcium ions are adsorbed, precipitated and removed by the sludge in the adsorption tank, so the sludge of the subsequent biochemical system iseffectively protected from being inorganic; and meanwhile, the adsorption tank is in a micro-aerobic state, and organic matters and nitrate nitrogen in the wastewater are subjected to a denitrification reaction, so organic matters and nitrate nitrogen are removed. When the method is used for treating nitrocellulose wastewater with high nitrate nitrogen, high sulfate and low chemical oxygen demand, the total nitrogen and C