循环活性污泥系统(CASS)是一种先进的污水处理工艺，本文提出了实现CASS工艺的一种计算机自动控制系统，该系统具有较好的灵活性和较高的可靠性、可维护性。
Cyclic activated sludge system (CASS) is an advanced sewage treatment technics. This paper presents a computer control system, which has a better adaptability and strength, and easy to maintain.
它们包括先进的薄膜过滤污水处理系统、高效的太阳能照明，以及用于供电、供热和制冷的天然气联合循环涡轮机。
They include advanced, membrane-filtered wastewater treatment systems, solar-powered, high-efficiency lighting and natural gas combined-cycle turbines that will deliver power, heating and cooling.
为期四天的展会将展示先进的环保技术与设备，如清洁的煤炭产品、污水处理和垃圾利用技术。
The four days of Exhibition will display advanced technology and equipments of environmental protection, like clean coal products, sewage disposal and garbage utilization technology.
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