Which type of portable dewatering equipment is mentioned in the provided information?

The correct answer includes all mentioned types of portable dewatering equipment, which are S type, Peri Jet, and ESP. Each of these types plays a critical role in various dewatering applications, which are essential in construction, mining, and environmental remediation projects.

The S type refers to a range of pumps designed for efficient dewatering in challenging environments, focusing on handling variable water levels and sediment content. Peri Jet technology typically utilizes mixing and aeration to enhance the dewatering process, making it suitable for specific applications where effective liquid-solid separation is required. Meanwhile, ESP, or Electric Submersible Pumps, are versatile and widely used due to their ability to efficiently manage large volumes of water, particularly in deep well dewatering scenarios.

Considering that all three types serve different purposes but collectively contribute to the dewatering process, the choice that encompasses all three options provides a comprehensive understanding of the available portable dewatering equipment.