The cobblestone crushing and sand washing production line wastewater treatment line was invested and constructed by Liquan Fangjie Precision Casting and Forging Co., Ltd. and operated by Shaanxi Benchun Labor Service Co., Ltd. All equipment is provided by our company. The main equipment is a 20M sewage treatment tank, two 800 * 200 sand washing and recycling machines, and 4 2m * 80 plate and frame presses. The output is 500T / H, the mud content is 10% -15%, and the sewage is 1600T / H. The processing capacity is 9.6m / h, and the total sludge volume is 384m / h, about 62t / h of mud cake.