Constructed Wetlands for removal of Phosphorus from Domestic Wastewater-A Patent Review

Sustainable Water Resources Management - Tập 8 - Trang 1-16 - 2022
Vandana Patyal1, Dipika Jaspal1, Amit K. Tiwari2, Kanchan Khare1
1Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed University) (SIU), Pune, India
2Symbiosis Centre for Research and Innovation (SCRI), Symbiosis International (Deemed University) (SIU), Pune, India

Tóm tắt

Research related to phosphorus (P) removal in domestic wastewater treatment has increased manifolds due to stress on freshwater resources globally. Constructed Wetlands (CWs) have gained popularity as an innovative, sustainable, and cost-effective technology in this direction. This review summarizes the various patenting patterns and innovations related to the application of CWs for the removal of P from domestic wastewater. For this purpose, the Relecura patent database has been used. The patent landscape has been analyzed based on application volume, patent geographical details, application organization, main technologies, keywords, concepts, assignees, code analysis, and citation analysis. The results indicate that a total of 115 patents have been filed in this field of research, out of which 76 are patent applications and 39 granted patents which indicates a tough examination cycle and a limited rate of the grant of patent applications. China is leading with a total patent count of 105 and also in terms of citations, inventors, and assignees. Based on citations most of the patents are related to efficient sewage treatment systems by incorporation of solar heating, immobilized bed, moving bed, double layer wetland system, and composite filling material systems. The study cogitates about inventions and utility model patents related to different configurations and types of artificial wetlands employing natural, waste, and synthesized material adsorbents. Synthesized adsorbents utilizing low-cost materials to improve P adsorption have been shown to have an added economic and environmental advantage of extending the filler replacement cycle and minimization of secondary pollution.

Tài liệu tham khảo

Alex M (2021) Quantum technologies: a review of the patent landscape. arXiv preprint. arXiv: 2102.04552 Amann A, Zoboli O, Krampe J, Rechberger H, Zessner M, Egle L (2018) Environmental impacts of P recovery from municipal wastewater. Resour Conserv Recycl 130:127–139. https://doi.org/10.1016/j.resconrec.2017.11.002 Aminsharei F, Borghei SM, Arjomandi R, Nouri J, Pendashteh A (2019) Effects of various plants on treatment efficiency of horizontal subsurface flow constructed wetlands based on the hydraulic retention time. Environ Eng Manag J 18:1201–1206. https://www.eemj.icpm.tuiasi.ro/pdfs/vol18/full/no6/4_463_Aminsharei_16.pdf Ashekuzzaman SM, Jiang JQ (2017) Strategic phosphate removal/recovery by a re-usable Mg–Fe–Cl layered double hydroxide. Process Saf Environ Prot 107:454–462. https://doi.org/10.1016/j.psep.2017.03.009 Ashekuzzaman SM, Jiang JQ (2018) Use of Ca-and Mg-type layered double hydroxide adsorbent to reduce phosphate concentration in secondary effluent of domestic wastewater treatment plant. Desalin Water Treat 127:64–70. https://doi.org/10.5004/dwt.2018.22535 Ashekuzzaman SM, Kwapinska M, Leahy JJ, Richards K, Fenton O (2020) Novel use of dairy processing sludge derived pyrogenic char (DPS-PC) to remove P in discharge effluents. Waste Biomass Valorizat 11:1453–1465. https://doi.org/10.1007/s12649-019-00731-9 Bai S, Gao X, Ding Y, You S, Lyu T (2018) Constructed wetland effluent treatment plant [internet]. Available at https://lens.org/031-317-165-701-287 Bunce JT, Ndam E, Ofiteru ID, Moore A, Graham DW (2018) A review of P removal technologies and their applicability to small-scale domestic wastewater treatment systems. Front Environ Sci 6:8. https://doi.org/10.3389/fenvs.2018.00008 Chang H, Guo X, Liu J, Zou J (2010) Double-layer artificial wetland system for strengthening sewage denitrification and dephosphorization and operation method thereof [internet]. Available at https://lens.org/126-132-111-178-391 Chang H, Guo X, Liu J, Zou J (2012) Double-layer artificial wetland system for strengthening sewage denitrification and dephosphorization and operation method thereof [internet]. Available at https://lens.org/104-816-328-325-697 Chen H, Chen T, Ru L (2020a) Composite P removal material based on collophanite and application method thereof [internet]. Available at https://lens.org/178-146-976-173-585 Chen H, Chen T, Ru L (2020b) P removal material based on collophanite tailings as well as preparation and application methods thereof[internet]. Available at https://lens.org/019-436-411-138-782 Chicaiza C, Huaraca L, Almeida-Naranjo CE, Guerrero VH, Villamar CA (2020) Improvement of organic matter and nutrient removal from domestic wastewater by using intermittent hydraulic rates on earthworm–microorganism biofilters. Water Sci Technol 82:281–291. https://doi.org/10.2166/wst.2020.139 Committee on WIPO Standards (CWS), Seventh session on 5th July 2019. https://www.wipo.int/export/sites/www/standards/en/pdf/03-03-01.pdf Cooperative Patent Classification (CPC) (2021). https://www.cooperativepatentclassification.org/index Delgado-González L, Prost-Boucle S, Troesch S, Molle P (2021) Granulated apatite filters for phosphorous retention in treatment wetlands: experience from full-scale applications. J Water Process Eng 40:101927. https://doi.org/10.1016/j.jwpe.2021.101927 Dell’Osbel N, Colares GS, de Oliveira GA, de Souza MP, Barbosa CV, Machado ÊL (2020) Bibliometric analysis of phosphorous removal through constructed wetlands. Water Air Soil Pollut 231:1–18. https://doi.org/10.1007/s11270-020-04513-1 Dong C, Peng B, Wang X, Gao B, Ma H, Han D, Cang L, Hu H, Lu X (2014) Filler used for constructed wetland water treatment and preparation method of filler [internet]. Available at https://lens.org/038-041-613-901-574 Engida TM, Wu JM, Xu D, Wu ZB (2020) Review paper on treatment of industrial and domestic wastewaters using uasb reactors integrated into constructed wetlands for sustainable reuse. Appl Ecol Environ Res 18:3101–3129 Feng C, Yang S (2013) Device, system and method for vertical multilevel soil permo-treatment of sewage and mixed fillers [internet]. Available at https://lens.org/045-285-336-827-189 Fan B, Gao Y, Tan D, Guo H, Wang W, Zhai P (2014) Constructed wetland combination substrate, constructed wetland system and method for efficiently removing P [internet]. Available at https://lens.org/189-677-815-622-951 Franklin S, Somanchi A, Rudenko G, Bhat R, Zhao X, Bond R, Rakitsky W, Marangoni A, Braksmayer D (2015) Tailored oils [internet]. Available at https://lens.org/055-916-129-900-524 Gao C, Yang Y, Ye G (2010) Oligodynamic moving bed sanitary sewage disposal system [internet]. Available at https://lens.org/098-771-464-212-513 Gao C, Yang Y, Ye G (2012) Oligodynamic moving bed sanitary sewage disposal system [internet]. Available at https://lens.org/152-854-548-394-799 Gao J, Li Q, Zhang J, Zhou H, Ban Y, Fan P, Guo H (2020) Multifunctional novel composite efficient P removal filler and preparation method thereof [internet]. Available at https://lens.org/157-931-742-229-170 García-Ávila F (2020) Treatment of municipal wastewater by vertical subsurface flow constructed wetland: Data collection on removal efficiency using Phragmites Australis and Cyperus Papyrus. Data Brief 30:105584. https://doi.org/10.1016/j.dib.2020.105584 Ghule B, Laad M, Tiwari AK (2021) Poly-4-methyl-1-pentene a dielectric material: patent landscape. J Energy Storage 36:102335. https://doi.org/10.1016/j.est.2021.102335 Gubernat S, Masłoń A, Czarnota J, Koszelnik P (2020) Reactive materials in the removal of P compounds from wastewater—a review. Materials 13:3377. https://doi.org/10.3390/ma13153377 Guida S, Rubertelli G, Jefferson B, Soares A (2021) Demonstration of ion exchange technology for P removal and recovery from municipal wastewater. Chem Eng J 420:129913. https://doi.org/10.1016/j.cej.2021.129913 Guo Y, Guo T, Hou P, Liu D (2017) High-performance packing [internet]. Available at https://lens.org/143-757-757-732-159 Hao H, Wang Y, Shi B (2019) NaLa(CO3)2 hybridized with Fe3O4 for efficient phosphate removal: synthesis and adsorption mechanistic study. Water Res 155:1–11. https://doi.org/10.1016/j.watres.2019.01.049 Harris S, Trippe A, Challis D, Swycher N (2020) Construction and evaluation of gold standards for patent classification—a case study on quantum computing. World Pat Inf 61:101961. https://doi.org/10.1016/j.wpi.2020.101961 He Y, Huang Y, Liang B, Zhang W, Zhao X (2010) P-removing adsorbent and preparation method thereof [internet]. Available at https://lens.org/192-664-956-060-652 Heikkilä J, Lorenz A (2018) Need for speed? Exploring the relative importance of patents and utility models among German firms. Econ Innov New Technol 27:80–105. https://doi.org/10.1080/10438599.2017.1310794 Hoag GE, Collins J (2008) Soil remediation method and composition [internet]. Available from: https://lens.org/177-655-645-557-663 Hoag GE, Collins J (2011) Soil remediation method and composition [internet]. Available at https://lens.org/140-813-538-492-196 Hoang Lam N, Ma HT, Bashir MJ, Eppe G, Avti P, Nguyen TT (2020) Removal of phosphate from wastewater using coal slag. J Environ Anal Chem. https://doi.org/10.1080/03067319.2019.1708907 Hou J, Wang P, Wang C, You G, Xu Y, Qian J, Ao Y, Miao L, Zhang F (2017) Circulating zero-valent iron biofilter for strengthened treatment of rural domestic wastewater [internet]. Available at https://lens.org/066-961-536-225-580 Hu ZW (2007) Ecological method for purifying trench sewage [internet]. Available at https://lens.org/097-923-309-104-276 Hu S (2017) Preparation method of constructed wetland novel filling material used for sewage treatment [internet]. Available at https://lens.org/143-671-186-264-701 Hu Z, Wu Y, Yang L, Lin X, Wang Y (2008) Ecological method for purifying trench sewage [internet]. Available at https://lens.org/029-716-549-247-454 Huang J (2014) Immobilized microorganism wastewater treatment process [internet]. Available at https://lens.org/115-496-945-603-41X Huang J (2015) Immobilized microorganism wastewater treatment process[internet]. Available at https://lens.org/103-791-366-715-245 Huber M, Athanasiadis K, Helmreich B (2020) P removal potential at sewage treatment plants in Bavaria—a case study. Environ Challenges 1:100008. https://doi.org/10.1016/j.envc.2020.100008 Hunt D, Nguyen L, Rodgers M (2012) Patent searching: tools and techniques. Wiley, New Jersey Izadi P, Izadi P, Eldyasti A (2020) Design, operation and technology configurations for enhanced biological P removal (EBPR) process: a review. Rev Environ Sci Biotechnol 19:561–593. https://doi.org/10.1007/s11157-020-09538-w Jing J, Mao Y, Gao X, Ma H, Fan T, Zhang X, Peng J, Pan Z, Mou X, Yuan Z, Wu N, Bu X, Wang L, Huo-bu C (2020) Artificial wetland filler and preparation method thereof [internet]. Available at https://lens.org/132-773-339-250-852 Jun Y-S, Kim D (2019) Engineered calcium alginate and uses thereof [internet]. Available at https://lens.org/085-870-659-172-891 Khalifa ME, Abou El-Reash YG, Ahmed MI, Rizk FW (2020) Effect of media variation on the removal efficiency of pollutants from domestic wastewater in constructed wetland systems. Ecol Eng 143:105668. https://doi.org/10.1016/j.ecoleng.2019.105668 Kim J, Valentine K (2021) The innovation consequences of mandatory patent disclosures. J Account Econ 71:101381. https://doi.org/10.1016/j.jacceco.2020.101381 Koli MM, Munavalli GR (2021) Field-scale baffled and biorack hybrid constructed wetland: effect of fluctuating loading rates and recirculation for domestic wastewater treatment. Int J Phytoremediation. https://doi.org/10.1080/15226514.2021.1895720 Kumar S, Dutta V (2019) Constructed wetland microcosms as sustainable technology for domestic wastewater treatment: an overview. Environ Sci Pollut Res 26:11662–11673. https://doi.org/10.1007/s11356-019-04816-9 Leydesdorff L, Kogler DF, Yan B (2017) Mapping patent classifications: portfolio and statistical analysis, and the comparison of strengths and weaknesses. Scientometrics 112:1573–1591. https://doi.org/10.1007/s11192-017-2449-0 Li Y (2012) Composite-type sewage sludge treatment system for artificial wetland [internet]. Available at https://lens.org/173-449-687-045-145 Li S, Chen Y, Cao Z (2009) Ventilating and baffling artificial wetland simulator [internet]. Available at https://lens.org/047-280-072-496-610 Li RH, Cui JL, Li XD, Li XY (2018) P removal and recovery from wastewater using Fe-dosing bioreactor and cofermentation: investigation by X-ray absorption near-edge structure spectroscopy. Environ Sci Technol 52:14119–14128. https://doi.org/10.1021/acs.est.8b03355 Li B, Wu H, Ning P, Guan Q, Wang Z (2019) Domestic sewage treatment system [internet]. Available at https://lens.org/032-566-467-043-615 Li J, Zheng B, Chen X, Li Z, Xia Q, Wang H, Yang Y, Zhou Y, Yang H (2021a) The use of constructed wetland for mitigating nitrogen and P from agricultural runoff: a review. Water 13:476. https://doi.org/10.3390/w13040476 Li X, Shen S, Xu Y, Guo T, Dai H, Lu X (2021b) Application of membrane separation processes in P recovery: a review. Sci Total Environ 767:144346. https://doi.org/10.1016/j.scitotenv.2020.144346 Lima MX, Carvalho KQ, Passig FH, Borges AC, Filippe TC, Azevedo JC, Nagalli A (2018) Performance of different substrates in constructed wetlands planted with E. crassipes treating low-strength sewage under subtropical conditions. Sci Total Environ 630:1365–1373. https://doi.org/10.1016/j.scitotenv.2018.02.342 Liu L (2020) Standard modular filler and horizontal subsurface flow constructed wetland [internet]. Available at https://lens.org/102-837-660-635-371 Liu C, Gao C, Liu L, Dong J (2012) High-efficient circulating vertical flow constructed wetland and device suitable for sewage decentralized treatment [internet]. Available at https://lens.org/044-302-288-738-282 Liu Y, Long E, Huang R, Huang W (2013) Preparation and application of dephosphorizing adsorbents for constructed wetlands [internet]. Available at https://lens.org/062-921-028-055-595 Lopes FA, Davies-Colley R, Piazi J, Silveira JS, Leite AC, Lopes NIA (2020) Challenges for contact recreation in a tropical urban lake: assessment by a water quality index. Environ Dev Sustain 22:5409–5423. https://doi.org/10.1007/s10668-019-00430-4 Ma X, Niu Y, Yu C, Wang R (2011) Aeration oxidizing ecological bed used for waste water treatment [internet]. Available at https://lens.org/081-128-783-807-67X Ma M, Lin B, Yang J, Pu W, An D, Qu E, Pu L, Li L, Zhu L, Chang D (2013) Rural domestic sewage biological treatment system [internet]. Available at https://lens.org/107-984-873-956-509 Ma Y, Dai W, Zheng P, Zheng X, He S, Zhao M (2020) Iron scraps enhance simultaneous nitrogen and P removal in subsurface flow constructed wetlands. J Haz Mater 395:122612. https://doi.org/10.1016/j.jhazmat.2020.122612 Magrí A, Carreras-Sempere M, Biel C, Colprim J (2020) Recovery of P from wastewater profiting from biological nitrogen treatment: upstream, concomitant or downstream precipitation alternatives. Agronomy 10:1039. https://doi.org/10.3390/agronomy10071039 Melsheimer KH (2019) Building system for cascading flows of matter and energy [internet]. Available at https://lens.org/016-435-431-382-121 Mekonnen MM, Hoekstra AY (2018) Global anthropogenic P loads to freshwater and associated grey water footprints and water pollution levels: a high-resolution global study. Water Resour Res 54:345–358. https://doi.org/10.1002/2017WR020448 Mo D, Duan J, Zhang Q, Zheng T, Wu C, Li T (2014) Application of potash feldspar taken as adsorbing material to removing P in wastewater [internet]. Available at https://lens.org/090-021-185-891-521 Moehrle MG, Walter L, Bergmann I, Bobe S, Skrzipale S (2010) Patinformatics as a business process: a guideline through patent research tasks and tools. World Pat Inf 32:291–299. https://doi.org/10.1016/j.wpi.2009.11.003 Mustafa A, Ali M (2019) Waste materials as substrates in vertical flow constructed wetlands treating domestic wastewater. In: Ortega Riegos FA, Lega M, Itoh H (eds) Waste management and the environment IX. WIT press, Southampton, pp 339–346 Paerl HW, Scott JT, McCarthy MJ, Newell SE, Gardner WS, Havens KE, Hoffman DK, Wilhelm SW, Wurtsbaugh WA (2016) It takes two to tango: when and where dual nutrient (N & P) reductions are needed to protect lakes and downstream ecosystems. Environ Sci Technol 50:10805–10813. https://doi.org/10.1021/acs.est.6b02575 Parde D, Patwa A, Shukla A, Vijay R, Killedar DJ, Kumar R (2021) A review of constructed wetland on type, technology and treatment of wastewater. Environ Technol Innov 21:101261. https://doi.org/10.1016/j.eti.2020.101261 Pei H, Shao Y, Hu W, Meng P, Chen Y, Li Z (2015) Method for strengthening sanitary sewage treatment capacity of constructed wetland through fixed type bacillus with polymeric sponges as carrier [internet]. Available at https://lens.org/119-155-829-389-356 Qiu S, Pang C, Ma F, Xu S (2012) Double-layer subsurface-flow constructed wetland system used for sewage treatment in medium and small towns of cold areas and operation method thereof [internet]. Available at https://lens.org/166-717-477-787-284 Raturi MK, Sahoo PK, Mukherjee S, Tiwari AK (2010) Patinformatics—An Emerging Scientific Discipline. https://ssrn.com/abstract=1566067 Relecura, Accessed on 22 March, 2021. https://relecura.com/ Ren Y, Zha Z, Wang M, Qian Z, Yang L (2017) Phosphorous removal packing and preparation method thereof[internet]. Available at https://lens.org/120-152-772-011-863 Schindler DW, Carpenter SR, Chapra SC, Hecky RE, Orihel DM (2016) Reducing P to curb lake eutrophication is a success. Environ Sci Technol 50:8923–8929. https://doi.org/10.1021/acs.est.6b02204 Shan S, Wang W, Liu D, Zhao Z, Shi W, Cui F (2020) Remarkable phosphate removal and recovery from wastewater by magnetically recyclable La2O2CO3/γ-Fe2O3 nanocomposites. J Haz Mater 397:122597. https://doi.org/10.1016/j.jhazmat.2020.122597 Sharma S, Lekshmi B, Sutar RS, Parikh YJ, Ranade DR, Asolekar SR (2020) Reuse of washing machine effluent using constructed wetland: the circular economy of sanitation. In: Ghosh S, Saha P, Di Francesco M (eds) Recent trends in waste water treatment and water resource management. Springer, Singapore, pp 85–100 Shen Y, Zhuang L, Zhang J, Fan J, Yang T, Sun S (2019) A study of ferric-carbon micro-electrolysis process to enhance nitrogen and P removal efficiency in subsurface flow constructed wetlands. Chem Eng J 359:706–712. https://doi.org/10.1016/j.cej.2018.11.152 Shen D, Huang S, Zhang Y, Zhou Y (2021) The source apportionment of N and P pollution in the surface waters of lowland urban area based on EEM-PARAFAC and PCA-APCS-MLR. Environ Res 197:111022. https://doi.org/10.1016/j.envres.2021.111022 Sheng X, Qiu S, Xu F, Shi J, Song X, Yu Q, Liu R, Chen L (2020) Management of rural domestic wastewater in a city of Yangtze delta region: performance and remaining challenges. Bioresour Technol Rep 11:100507. https://doi.org/10.1016/j.biteb.2020.100507 Shi X, Fan J, Zhang J, Shen Y (2017) Enhanced P removal in intermittently aerated constructed wetlands filled with various construction wastes. Environ Sci Pollut Res 24:22524–22534. https://doi.org/10.1007/s11356-017-9870-z Shraddha K, Dipika J, Arti M (2018) Green and eco-friendly materials for the removal of p from wastewater. Life cycle assessment of wastewater treatment. CRC Press Taylor & Francis Group, Routledge, pp 199–219 Stewart WC (1994) Method and apparatus for treating storm water [internet]. Available at https://lens.org/182-924-885-881-511 Sun L, Wang L, Wang C (2013) Floating unit type membrane bioreactor [internet]. Available at https://lens.org/003-809-234-420-338 Tan X, Yang Y, Liu Y, Li X, Fan X, Zhou Z, Liu C, Yin W (2019) Enhanced simultaneous organics and nutrients removal in tidal flow constructed wetland using activated alumina as substrate treating domestic wastewater. Bioresour Technol 280:441–446. https://doi.org/10.1016/j.biortech.2019.02.036 Tonisson L, Maicher L (2012) Patents, their importance and valuation methods. Fraunhofer MOEZ Working Paper, Leipzig, Germany Trippe AJ (2002) Patinformatics: identifying haystacks from space. Searcher-Medford NJ 10:28–41. https://www.infotoday.com/searcher/oct02/trippe.htm Trippe AJ (2003) Patinformatics: tasks to tools. World Pat Inf 25:211–221. https://doi.org/10.1016/S0172-2190(03)00079-6 United States Patent and Trademark Office (2010) Overview of the US Patent Classification System (USPC) (PDF). United States Patent and Trademark Office. p 16, retrieved 12 August 2011 Vargas E, Pérez Y, Hernández W, Checo H, García-Cortés D, Jáuregui-Haza U (2021) Design and assessment of a domestic wastewater treatment system based on a constructed wetland with subsurface flow in Jarabacoa, Dominican Republic. Procedia Environ Sci Eng Manag 8:371–380. https://procedia-esem.eu/pdf/issues/2021/no2/8_40_Vargas_21.pdf Vymazal J (2010) Constructed wetlands for wastewater treatment. Water 2:530–549. https://doi.org/10.3390/w2030530 Waltman L, Van Eck NJ, Noyons EC (2010) A unified approach to mapping and clustering of bibliometric networks. J Informetr 4:629–635. https://doi.org/10.1016/j.joi.2010.07.002 Wang H, Xu J, Sheng L (2020) Purification mechanism of sewage from constructed wetlands with zeolite substrates: a review. J Clean Prod 258:120760. https://doi.org/10.1016/j.jclepro.2020.120760 Wang W, Zhou L, Wang H, Liu H, Bu L (2013) Spherical haydite matrix for constructed wetland and its preparation method [internet]. Available at https://lens.org/070-656-535-284-320 Wang S, Yao S, Du K, Yuan R, Chen H, Wang F, Zhou B (2021) The mechanisms of conventional pollutants adsorption by modified granular steel slag. Environ Eng Res 26:86–98 Wanielista MP, Chang N-B, Makkeasorn A (2011) Passive underground drainfield for septic tank nutrient removal using functionalized green filtration media [internet]. Available at https://lens.org/137-144-637-486-302 Wu Z, He F, Wu J, Xu D, Liang W, Zhou Q (2011) Vertical-flow artificial wetland composite matrix [internet]. Available at https://lens.org/018-795-259-873-704 Yang C, Jin J, Ding C, Li Z (2011) Process for treating chemical industry tail water with immobilized microorganism-artificial wet land [internet]. Available at https://lens.org/129-875-871-774-678 Yuan H (2014a) Wastewater treatment process with solar energy heat preservation effect [internet]. Available at https://lens.org/094-439-126-371-669 Yuan H (2014b) Artificial wetland device[internet]. Available at https://lens.org/172-101-080-417-148 Yuan H (2015a) Wastewater treatment process with solar energy heat preservation effect[internet]. Available at https://lens.org/179-629-084-348-119 Yuan H (2015b) Artificial wetland device[internet]. Available at https://lens.org/008-378-951-434-943 Yujun WA, Ruofan WA, Wenfei WA, Yang SH, Aozhan LI (2021) Comparation of P removal effect of biochar and concrete slag in constructed wetland. Chin J Environ Eng 15:1–7. https://doi.org/10.12030/j.cjee.202002003 Zeng T, Hu Q, Fu L, Cai P, Liu Y (2020) Domestic sewage treatment system [internet]. Available at https://lens.org/157-230-329-015-679 Zhang RL (2006) Composite ecological treatment method of sewage for artificial wet land and its system[internet]. Available at https://lens.org/146-923-452-076-226 Zhang Y, Chen Y (2007) Technique for treating garbage percolate based on diatomite and uasb[internet]. Available at https://lens.org/160-967-191-438-381 Zhang R, Liu M (2009) Composite Ecological treatment method of sewage for artificial wet land and its system[internet]. Available at https://lens.org/071-244-676-548-727 Zhang H, Jiao S, Zhang Y, Liang B, Wang W (2012a) Method for preparing P accumulating filler by sintering mineralized refuse material[internet]. Available at https://lens.org/178-492-651-602-726 Zhang H, Zhang M, Xu D, Zhang L, Wu W, Wang F (2012b) Method for removing nitrogen and P in sewage by zeolite synthesized by coal ash [internet]. Available at https://lens.org/132-100-831-602-622 Zhang R, Pan L, Wu H, Xi D, Zhao X, Wang L, Zhao X, Zu B, She W, Zhou N (2018) Aluminum sludge composite filler for constructed wetland and preparation method of filler[internet]. Available at https://lens.org/037-604-518-925-690 Zhao Y, Xi B, Xia X, Zhang L, Yang T, Li X (2012) Constructed wetland composite filling material for water treatment and preparation method thereof[internet]. Available at https://lens.org/185-718-162-827-329