Construction content:　 The total dealing scale of the project is 1000m3 / d, the main pollutants in wastewater are hexavalent chromium, COD, BOD5, SS, sulfide, color, ammonia and other pollutants.　 Huali overall contract includes the full range project design for acid wasted gas treatment , equipment and materials procurement and supply, transportation, warehousing, construction, installation, supervision and guidance, technical services, training, commissioning, trial operation and the entire system performance guarantees and after-sales service