US 11,691,893 B2
Method for directly and deeply purifying high concentration organic wastewater
Xilin Chai, Jiangxi (CN); and Shijun Wang, Jiangxi (CN)
Assigned to JIANGXI GAIA ENVIRONMENTAL SCIENCE AND TECHNOLOGY CO., LTD., Jiangxi (CN)
Appl. No. 16/346,540
Filed by JIANGXI GAIA ENVIRONMENTAL SCIENCE AND TECHNOLOGY CO., LTD., Jiangxi (CN)
PCT Filed Mar. 17, 2017, PCT No. PCT/CN2017/077045
§ 371(c)(1), (2) Date May 1, 2019,
PCT Pub. No. WO2018/082235, PCT Pub. Date May 11, 2018.
Claims priority of application No. 201610976118.7 (CN), filed on Nov. 7, 2016.
Prior Publication US 2020/0055740 A1, Feb. 20, 2020
Int. Cl. C02F 1/00 (2023.01); C02F 1/52 (2023.01); C02F 1/56 (2023.01); C02F 1/66 (2023.01); C02F 3/30 (2023.01); C02F 9/00 (2023.01)
CPC C02F 1/001 (2013.01) [C02F 1/5236 (2013.01); C02F 1/56 (2013.01); C02F 1/66 (2013.01); C02F 3/30 (2013.01); C02F 9/00 (2013.01); C02F 2001/007 (2013.01); C02F 2301/04 (2013.01); C02F 2301/10 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for directly purifying organic wastewater, comprising steps of:
(1) fortified precipitation treatment: sending the organic wastewater to an enhanced precipitation unit for pretreatment, wherein the enhanced precipitation unit comprises a dosing and coagulation unit, a dosing and flocculation unit and a physical precipitation unit;
(2) filtration of sediment of suspended solids: passing the organic wastewater treated by the enhanced precipitation unit through a filtration unit for the sediment of the suspended solids, wherein a filter material of the filtration unit for the sediment of the suspended solids is selected from the group of gravel, river sand, and combinations thereof, and particle size distribution of a filter bed comprises: 2-4 cm of a surface layer, 1-2 cm of a middle and upper layer, and 0.5-1 cm of a lower layer;
(3) pH adjustment: performing alkalinity adjusting pretreatment on the organic wastewater after the filtration of the sediment of the suspended solids in the step (2) and adjusting a pH value of the organic wastewater to a range of 7.5-10.5;
(4) hydrolysis acidification: introducing the organic wastewater after adjusting the pH value into a water distribution unit, and a biological membrane packing is provided in the water distribution unit to strengthen anaerobic hydrolysis acidification effects of the organic wastewater;
(5) treatment of a bio-filter: distributing the organic wastewater into a bio-filter unit by the water distribution unit, so as to achieve direct treatment of the organic wastewater by organic matter degradation ability of biological filler;
wherein when a concentration of the suspended solids in the organic wastewater does not need removal, the step (1) of fortified precipitation treatment is omitted, and the organic wastewater is directly performed with the step (2) of the filtration of the sediment of the suspended solids;
wherein a temperature adjustment control system is provided on the bio-filter, the temperature adjustment control system comprises a heating system, an insulated filter wall, and a temperature sensing control system, wherein the heating system is connected with a fan outlet pipe, and after heating air, a hot air is introduced into the bio-filter; wherein the heating system comprises an insulated aluminum shell, heat insulating cotton, a steel pipe and heating pipes from an external side to an internal side; the heating pipes are far infrared radiation heating lamps and/or a PTC ceramic heating elements.