A process for treatment of biological waste includes passing biological waste liquid downwardly through at least one substantially vertically oriented curtain having a reinforcing layer of support material. Attached thereto is at least one layer of flexible reticulated open cellular material having a plurality of communicating cells which form a support for filamentous micro-organisms and/or symbionts included in the filamentous micro-organisms. The filamentous micro-organisms and/or symbionts form a dense mat of cellular material adhering to the support. The biological waste is collected after passage through the curtain for ultimate disposal.
The present invention provides a device for biological wastewater treatment which prevents flotation and deformation of mesh tubes packed in a reactor tank as microorganism retaining materials. Device for biological water treatment 10 of the present invention comprises reactor tank 11; microorganism retaining media 12, which are installed in the tank; and air diffuser tubes 14, and wastewater distributor tube 16, both of which are installed under the microorganism retaining media. The microorganism retaining media comprise supporting media 22 and mesh tubes 24, which are installed on the supporting media. The supporting media are constituted in a manner that at least two the beams 26 are arranged on each supporting tier in parallel at certain intervals and the direction of the arrangement of the beams is alternately shifted by an angle of 90 degrees at every supporting tier. Also, the supporting tiers are piled in a manner that a space between two adjacent supporting tiers is enough for arranging mesh tubes on a supporting tier. The mesh tubes on each supporting tier are supported by beams of said supporting tier and arranged in parallel with beams on the adjacent tier.
A waste treatment apparatus (10) including one or more vertically oriented curtains (11) each formed of mesh material having a minimal aperture size of 0.001 mm, means for applying liquid waste to said curtain(s) located above said curtain (17, 15) and collection means (20A) for collection of treated waste after passage through said one or more curtains (12). There is also provided a method of treatment of waste using the waste treatment apparatus.
An apparatus for biologically treating lipid-containing waste water comprising a waste water introducer, a biological treatment constituted by a carrier holding a fixed lipid-assimilating, and a discharge for discharging the treated waste water. The carrier has a shape of string, lace, mat, sheet, fiber, sponge or film which facilitates the lipid-assimilating yeast to cling thereto. The apparatus may also be provided with backwashing for the biological treatment carrier, and an aerator for aerating the waste water. It is possible to directly treat lipid-containing waste water without producing any harmful matter and to efficiently reduce the concentration of the lipid (n-hexane extract) to not more than 30 mg/1. Furthermore, the maintenance of the apparatus is easy.
A looped cord biomedia filter cartridge is employed in a trickle tower filter to quickly and efficiently process wastewater. A base tank holds a volume of wastewater to be processed. The filter cartridge is mounted on top of the base tank and comprises a cylindrical frame having a plurality of upper and lower concentric hanger rings. The looped cord biomedia is interlaced, under tension, between the upper and lower concentric hanger rings to create a plurality of parallel, vertically extending, linear lengths of looped cord biomedia. The concentric hanger rings are radially spaced, and include circumferentially spaced notches for interlacing the looped cord biomedia. The spaced lengths of looped cord biomedia provide increased surface area while allowing sufficient space for water flow and air flow. Tensioning of the biomedia creates a highly desirable laminar downward flow of wastewater over the surfaces of the biomedia. The trickle tower further includes a spray bar assembly mounted on top of the filter cartridge, and a pump connected between the base tank and the spray bar assembly for circulating wastewater from the base tank to the spray bar. The spray bar provides a uniform distribution of wastewater over the top of the filter cartridge, the wastewater trickling down the vertical lengths of looped cord biomedia in a laminar flow where the wastewater comes into contact with biologically active microorganisms on the biomedia.
A wastewater treatment system comprises a septic tank which flows liquid effluent through an aerobic filter. The aerobic filter has a textile filter media. In one aspect, the textile filter media has relatively high open area and relatively low or moderate water holding capacity. In another aspect, the filter media comprises a plurality of vertically oriented textile sheets having a relatively small gap between adjacent sheets.
