Hi Glad to hear that you're on the filed for wastewater treatment plant. This is Emily from RJ Dewaterintel Environment Co.,Ltd. We specialized in wastewater treatment plant equipment for 6 years, with the customers of many countries. Equipments mainly include screw press sludge dewatering machine, solid liquid separator, kitchen waste separator, air floatation machine, chemical dosing machine and pump etc. FREE SAMPLES can be sent on request. Mail me, let's talk more! Best regards, Emily