Improvement of Sewage Treatment Plant in Guangxi LNG Receiving Station

Author of the article:Chen Cong

Author's Workplace：Shandong Natural Gas Pipeline Co., Ltd., Jinan, Shandong, 250014, China

Key Words：Receiving station; Sewage treatment plant; Sewage; Indicator

Abstract：Guangxi LNG receiving station is located in Tieshan Port District of Beihai City, Guangxi. The gasified natural gas of LNG transported by ocean is sent to users through long distance pipeline.The sewage treatment system is a part of the auxiliary facilities of the process for the treatment of production and domestic sewage at the receiving station,but it poses influence on the normal production of the receiving station and lifeof the staff.At present, with the commissioning of the receiving station, the sewage treatment plant has been plagued by issues such as excessive oil pollution, low microbial activity, discontinuous water intake, unregulated aeration and untimely replacement of some materials.After analyzing and researching these problems, we add a new oil separator and sludge reflux pump to the sewage treatment plant in order to reduce oil pollution and realize sludge reflux;a control valve is added as well to achieve aeration regulation;a fibre ball filter and composite filler are replaced;the water uptake rate of the self-priming pump is increased;at the same time, the automation control is optimized to improve the field automation operation and the sewage treatment capacity, and make the produced sewage meet the requirements of biochemical treatment, improve the activity of microorganisms.Each indicator of sewage after treatment meets the standards and specifications.