Taliworks first ventured into the wastewater business with the acquisition of Puresino (Guanghan) Water Co., Ltd. Guanghan (“Puresino Guanghan”) in 2006. Puresino Guanghan was established on 9 October 2006 with a registered and paid up capital of RMB20 million. It is a Sino-foreign joint venture company with Taliworks (Sichuan) Limited (“TSL”) holding 70% equity in the company.

The company holds a 30-year Build-Operate-Transfer (“BOT”) concession of the San Xin Dui Wastewater Treatment Plant (“WWTP”). This concession is effective from 1 December 2006 to 31 July 2033. The WWTP has a design capacity of 50 MLD to treat both domestic and industrial wastewater in Guanghan City and it commenced commercial operation since 1 September 2007.

Guanghan City is located in Sichuan Province, 40 km away from Chengdu City and 18 km away from Deyang City. Guanghan City has population of 570,000. The San Xin Dui Wastewater Treatment Plant is the only main WWTP in the city and was built on a 2.9-hectare site beside the YaZi River. The main sources of wastewater include domestic and industrial wastewater from residents, restaurants, hotels, hospitals and other public utilities; major industrial wastewaters come from the chemical industry, printing and dyeing, chemical fiber industry. The wastewater is transferred to the WWTP through a piping network by gravity flow.

The treatment process is BAF system. BAF systems coupled with pre-sedimentation followed by sieving result in footprint savings as much as 75% compared to the conventional treatment systems. Other advantages include the elimination of the secondary clarifiers and sludge return systems, rapid process start-up and capability of handling a wide range of flows and temperature variations. The plant inflow is designed as 50 MLD maximum average daily flow. This translates to 2083 m3/hr, the peak flow is 67.05 ml. There are 5 pumps of 700 m3/hr capacity each to transfer the wastewater to the next process.