Comprehensive treatment, purification and reuse technology for waste acid from sulfuric acid process titanium dioxide production in China. After being processed by the whole process system, the waste acid is purified and concentrated into clean acid for reuse, and titanium dioxide particles and metals are extracted and recovered to control the generation of hazardous waste titanium gypsum.

According to the reaction conditions of heavy metal ions, precise pH and ORP control are performed, and reagents are added to react with wastewater, and then enter into precise control and efficient precipitation to form solid-liquid separation, and then filtered through an efficient filtration system, and heavy metal capture or special effect resin is added for deep treatment to ensure removing heavy metals.

The process adopted is the unique patented "multi-cavity activated carbon + UHS" process of Shangchen Environment. After deep purification, it is reused in enterprise production, and the process and product water standards of "The Reuse of Urban Recycling Water-Water Quality Standard for Industrial Uses" (GB/T19923-2005) are implemented.

The watershed management technology of Shangchen Environment mainly uses a combination of biological and physical methods, focusing on in-situ restoration technology, which can restore the ecosystem and self-purification capacity of the watershed without dredging, effectively improve water quality, prevent soil erosion, and improve the environment.

Based on IoT data, establish a hierarchical watershed management algorithm application to achieve intelligent automatic control response, create a smart supervision platform to support remote command of the monitoring center and on-site business development of mobile terminals, and implement the innovative concept of "Internet +" for smart water affairs.

According to the characteristics of fine chemical production wastewater, we analyze the characteristics of the project wastewater based on the actual situation, and combine various technologies such as physicochemical sedimentation, advanced oxidation decomposition, high-efficiency biochemical degradation, ozone catalytic oxidation, and multi-dimensional electrocatalytic oxidation to ensure that the final effluent at the end of the system meets the standards stably.