A Magic Filter Filled with Waste Plastic Shavings, Loofah, and Iron Shavings for Wastewater Treatment

Abstract

Integrated sewage treatment equipment has been widely used, but the commonly used fillers for wastewater treatment are not suitable in rural areas due to their price and performance issues. In this study, an integrated magic filter filled with waste fillers was proposed and established for wastewater treatment. The filter was composed of functional modules and an equipment room, and the fillers in each module can be taken out separately and changed arbitrarily according to the needs of specific treatment conditions. The fillers used include waste plastic shavings, loofah, and waste iron shavings, generated during the processing of plastic, crop, and steel. At the same time, a 91 d experiment was performed for real wastewater treatment, and a satisfactory removal performance was obtained, with average removal rates of COD, TP, NH4+-N, TN, and SS being 83.3%, 89.6%, 93.8%, 74.7%, and 94.0%, respectively. Through microscope observation, a large number of microorganisms were attached to the surface of the fillers, which was conducive to the simultaneous removal of nitrogen and phosphorus. The micro-electrolysis of waste iron shavings can produce Fe2+ and Fe3+, which would combine with PO43− to form Fe3(PO4)2 and FePO4 precipitates, enhancing the removal of phosphorus. In addition, the filled fillers have an excellent physical filtering effect, which can reduce the effluent SS. The magic filter achieves both the recycling of wastes and the treatment of wastewater.

A Case Study of Swine Wastewater Treatment via Electrochemical Oxidation by Ti4O7 Anode

“…Based on the literature, the removal mechanism of TP in wastewater might be attributed to the transformation of organic phosphorus into a more easily removable form of inorganic phosphorus in EO treatment, which further reacted with Ca 2+ and/or Mg 2+ to form insoluble precipitates [ 39 , 40 , 41 , 42 ]. In addition, the removal might also be caused by that Fe 2+ in wastewater was oxidized to Fe 3+ which reacted with phosphate radicals to form FePO 4 [ 43 , 44 , 45 ].…”

Recent advances of textile sorbents for oil spills cleanup: A review

“…10,11 This disaster damaged ecosystems of local marine life resulting in changing in the ecological and eliminating of rare species. 12 Besides numerous oil spill accidents, the increase in the quantity of oily wastewater generated by different industrial processing (i.e, food, 13 daily chemical, 14 petrochemical, 15 leather, 16 textile, 17 metal finishing, 18 steel processing 19 ) and the seepage of organic solvents (i.e, benzene, toluene, chloroform, dichloromethane, cyclohexane) also threaten the earthly ecosystem. 20 Furthermore, a wide range of fresh water can be polluted by organic solvents or oil leading to the freshwater crisis 21,22 (Figure 1).…”

Modified Polymeric Biosorbents from Rumex acetosella for the Removal of Heavy Metals in Wastewater

“…It is also known that lignocellulose is present in different plant fibers and also has functional groups such as hydroxyl, carboxyl, and silanol, which contribute to its high biosorption capacity [ 19 , 20 ]. On the other hand, it could be possible to treat wastewater using other techniques and polymeric matrices, such as spent coffee [ 21 ], plastic shavings and loofah [ 22 ], non-living cells of Nannochloropsis oceanica [ 23 ], agro-industrial wastes [ 24 ] and cacti [ 25 ].…”