Study on Water Purification Effect and Operation Parameters of Various Units of Wastewater Circulation

The discharge of wastewater from aquaculture ponds causes a certain degree damage to the environment. It is necessary continuously improve treatment efficiency devices. purpose this study obtain an optimal ratio circulation devices in order best operating parameters and reduce polluted water. We constructed experimental device consisting three units. primary unit contained modified attapulgite (Al@TCAP-N), volcanic stone, activated carbon for precipitation. secondary tertiary units used biological methods enhance removal rates nitrogen phosphorus. Water quality indicators total phosphorus (TP), (TN), ammonia (NH3-N), permanganate (CODMn), suspended solids (TSS) were detected. was tested under different matching ratios hydraulic retention time (HRT) load Results showed that rate TP, TN, NH3-N, TSS reached 20–60%, 20%, 30–70%, 10–80%, respectively. average reduction efficiencies module chlorella filler on CODMn, 56.88%, 30.09%, 0.43%, 46.15%, 53.70%, can be achieved when each becomes 2:1:1 maintained within 2 h high-concentration load. Finally, 58.87%, 15.96%, 33.99%, 28.89%, second obtained enhanced effect system adding microorganisms sludge.