RIYADH: Alkhorayef Water and Power Technologies Company has signed a SR 60.96 million ($16.2 million) contract with the Saudi Zakat Tax and Customs Authority. Alkhorayef will take on the operation and maintenance works of water and wastewater treatment plants and their related services at all land ports of Saudi Arabia, according to a bourse filing on Tuesday. The financial impact of the contract has started to reflect positively on the income statements during the fourth quarter of 2021, the company said in a statement on Saudi Stock Market (Tadawul).