105 results about "Total suspended solids" patented technology

Methods and systems for a subsurface upflow wetland for wastewater treatment that includes a series of parallel treatment cells, each cell including from bottom to top, a layer of gravel, a layer of sand over the gravel to remove pathogens from a septic effluent, a pollution control medium above the sand layer to remove nutrients, total suspended solid, and biochemical oxygen demand and a growth media mixture layered on top of the pollution control media to grow plants, and a gravity distribution system to distribute effluent to the series of parallel treatment cells. The pollution control medium includes at least one recycled material and at least one naturally occurring material. In an embodiment it includes recycled tire crumb, sand and limestone or recycled tire crumb, compost, sand and limestone.

A system and method of wastewater treatment in a tank provides large mixing bubbles generated in the lower portion of the tank. In embodiments providing aerobic wastewater treatment, the system further provides oxygen to the wastewater by way of tiny aerating bubbles provided by diffusers. At least one sensor in the tank provides measurements of at least one wastewater treatment parameter such as total suspended solids, dissolved oxygen, ammonium or nitrate. An automatic controller in the system, responsive to measurements provided by the sensor, adjusts the rate of mixing provided by the large mixing bubbles. In some aerobic embodiments, the controller, responsive to measurements from the sensor, further adjusts the rate of oxygenation supplied to the wastewater by the tiny aerating bubbles.

Systems and methods for improving the quality of solids and liquids recovered at atmospheric pressure and temperature from a stillage stream generated as a by-product of an ethanol production process, the recovered solids having higher bio-available amino and fatty acids than evaporation-produced condensed solubles, the recovered liquids having less total solids and total suspended solids than evaporation-produced condensate. A static mixer includes an input for receiving the stillage stream combined with a GRAS anionic polymer, a cylindrical mixing chamber that controllably mixes the stillage stream and the polymer to generate wet flocculated solids and liquid co-product, and a discharge chute that outputs the wet flocculated solids and liquid co-products onto a moving, gravity filter belt having a membrane surface that separates the output from the static mixer into recovered liquids in the form of clarified, thin stillage and recovered solids in the form of dry flocculated solids.

Disclosed herein are an apparatus and method for cultivating microalgae using effluent from sludge treatment. The apparatus includes an advanced sewage treatment apparatus, a sludge treatment apparatus and a microalgae cultivation apparatus, the sludge treatment apparatus including: a first aerobic reactor which is operated under aerobic conditions and serves to ferment sludge; a second aerobic reactor which is operated in a state in which air is injected in an amount larger than that in the first aerobic reactor, and serves to increase the fermentation activity of microorganisms in the sludge and degrade the sludge; a membrane bio-reactor (MBR) which serves to receive effluent from the second aerobic reactor and biologically remove high-concentration organic matter from the effluent by the action of aerobic microorganisms while removing total suspended solids using a membrane, wherein the effluent discharged from the MBR reactor is supplied to the microalgae cultivation apparatus.

The present invention is a method of using crumb rubber from recycled tires as a filter media. The use of crumb rubber as a media differs from conventional sand or anthracite filters in several ways. The crumb rubber media is compressible which allows the porosity between rubber particles to decrease through the filter bed. The crumb rubber media compresses as headloss increases, allowing for better effluent quality late in the run. The crumb rubber media allows greater depth filtration. The crumb rubber media can be used at high filter rates, greater than 20 gpm/ft². The crumb rubber media performs similarly to other traditional filter media in respect to turbidity and total suspended solids removal. The crumb rubber media properties are closely tied to media size and shape, with smaller media providing better effluent qualities and larger media allowing longer filter runs at higher flow rates.

The invention relates to a composite biological enzyme preparation for the deweighting treatment of domestic sludge, and a production and application method thereof. The invention is characterized in that 100-500 kilograms of composite biological enzyme for the deweighting treatment of domestic sludge are used for 100 thousand tons of municipal domestic sewage, wherein the composite biological enzyme for the deweighting treatment of domestic sludge comprises 25-30 parts of protease, 20-25 parts of one or more of laccase, polyphenol oxidase and manganese peroxidase, 17-21 parts of one or more of xylanase, pentosanase and mannase, 20-25 parts of one or more of cellulase, pectinase and hemicellulase, 10-15 parts of lipase and 12-16 parts of amylase. Compared with the prior art, the invention removes hydrogen sulfide gas and undesirable odor thereof, simultaneously eliminates the inhibiting effect of H2S on the nitrification process, effectively reduces nitrate and ammonia, decomposes proteins, starch, fat, food oil, xylan, cellulose and other organic substances, converts suspended substances, accumulated waste and soluble organic substances in the sludge into carbon dioxide, nitrogengas, oxygen gas, water and sulphate, reduces the TSS (Total Suspended Solids), COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand), greatly decreases the yield of the sludge, and has the advantages of no poison, no corrosiveness and no secondary pollution production.

The invention discloses a novel compound microbial agent used for sludge reduction treatment. The compound microbial agent consists of photosynthetic bacteria, lactic acid bacteria and saccharomycetes, and comprises bacillus subtilis, bifidobacterium animals, bifidobacterium bifidum, bifidobacterium longum, lactobacillus acidophilus, lactobacillus casei, lactobacillus delbrueckii, lactobacillus fermentium, lactobacillus plantarum, lactococcus lactis, rhodopseudomonas palustris, streptococcus thermophilus and saccharomyces cerevisiae which are 13 different microorganisms in total. The compound microbial agent can reduce BOD (biochemical oxygen demand), COD (chemical oxygen demand) and TSS (total suspended solids) to expected values, effectively reduces sludge deposit in a treatment plant, and reduces corrosion on equipment to lower maintenance cost; and besides, bacteria can decompose an organic compound and can generate byproducts beneficial to environment.

The invention belongs to the filed of microbiological fuel cells, and provides a method for strengthening electricity generating performance of an MFC (Microbial Fuel Cell) by taking excess sludge as fuel and strengthening sludge reduction by enzyme. The method comprises the steps of adding 20mM of NaCl in the excess sludge for strengthening the electrical conductivity of solution, adding neutral protease and Alpha-amylase, and generating electricity by directly using electricity generating microorganisms in the excess sludge for one day so as to start the MFC and obtain higher electric energy, wherein the strengthening effect of the neutral protease and the Alpha-amylase on an SMFC (Sediment Microbial Fuel Cell) at 40 DEG C is the most obvious. Under a condition that the total concentration of the enzyme is not changed, the mass concentration ratio of the neutral protease and the Alpha-amylase is 2:3, at the moment, the power density is the largest (776mW*m-2), and the removal rates of TCOD (total chemical oxygen demand), TSS (total suspended solids) and VSS (volatile suspended solids) reach 87.29%, 91.75% and 95.01% respectively. The method is fast in starting, simple in process, convenient to operate, and low in cost, and can treat the excess sludge in an urban domestic sewage treatment plant.

Methods are described for removing contaminates from aqueous industrial wastewater process streams, to yield a less contaminated aqueous specifically in the area of soluble organic containing effluent for discharge. A premixed medium/high molecular weight and medium/high charged cationic coagulant solution polymer and a powered activated carbon (PAC) is injected into the wastewater, and after a delay on the order of about ten seconds or greater, a high molecular weight highly charged anionic flocculent polymer solution is injected into the wastewater which reduces oil and grease (FOG), (BOD). (COD), volatiles total suspended solids (TSS), and other contaminants.

An automatic control equipment for the biochemical flocculating treatment of city sewage features use of PC for in-line monitor and control to whole treating procedure. Its automatic control method features that the total content of P in output water is used as control target for automatically controlling the amount of added chemical, the in-line DO monitor system is used to automatically control the aeration, and the amount of total suspended particles is monitored for automatically controlling the reflux amount of sludge.

The invention relates to a method for promoting the phosphorus release and the gas production of phosphate-precipitate-containing sludge under a room temperature condition. The method comprises: placing phosphate-precipitate-containing sludge in a reactor, carrying out static precipitation at a room temperature, and discharging the supernatant to obtain concentrated mixed sludge; adding trisodiumcitrate according to the total suspended solid content of the sludge, sealing the reactor, and carrying out anaerobic fermentation for more than 7 days under a room temperature condition, wherein thephosphorus release rate of the sludge can be increased, and the anaerobic fermentation of the sludge can be promoted so as to produce acid and methane. Compared to the method in the prior art, the method of the present invention has the following characteristics that the phosphorus release in the phosphate-precipitate-containing sludge can be promoted sp as to improve the recovery rate of the phosphorus resource at the late stage and promote the anaerobic fermentation of the sludge to produce acid and gas, and achieve the resource utilization of the residual sludge, and the operation is performed at the room temperature, such that the economic cost is low.

The invention discloses a method for calculating the performance evaluation index of sponge city based on the measured value of the plot. Firstly, the site vertical arrangement, the sponge facility arrangement and the rainwater control flow field inspection are carried out, and the concentration of the total suspended solids of the initial and later rainwater runoff and the actual soil permeability parameters are obtained through the on-site monitoring and the actual data collection. Rezoning catchment zones; the topological structure model between catchment area, sponge facility and drainagenode is established, and the effective catchment area, ineffective catchment area, permeability ratio, initial runoff total suspended solids concentration, later runoff total suspended solids concentration and soil permeability parameters are substituted into the rainfall-flood model software. The operation model obtains the annual runoff control quantity and the facility annual total suspended matter removal rate, and then calculates the annual runoff total amount control rate and the annual total suspended matter removal rate. The invention can ensure the accurate evaluation of the performance evaluation index of the land sponge city, and is beneficial to the improvement of the land sponge city.

The invention discloses a sludge anaerobic fermentation treatment method synchronously enhancing acid production and phosphorus removal, and belongs to the field of sludge and sewage treatment. The method includes the steps that (1) excess sludge is added to an anaerobic reaction system, wherein the concentration of total suspended solids (TSS) of the excess sludge is 10000-15000 mg/L, and the concentration of volatile suspended solids (VSS) is 6000-9000 mg/L; (2) the pH value of the excess sludge is adjusted to be 10+/-0.1 with a sodium hydroxide solution; magnetite is added to the excess sludge with the addition amount of the magnetite being 0.3-0.9 g/gVSS; after air in a reactor is removed, the reactor is sealed, anaerobic fermentation is carried out for 10-15 days in the stirring state, and the pH of the excess sludge is maintained at 10+/-0.1 all the time in the stirring fermentation process. Compared with a simple alkaline condition, under the condition of the method, the accumulation of short-chain fatty acid is increased by 20% or above, and acid production by anaerobic fermentation of the excess sludge is effectively promoted; besides, the content of orthophosphoric acid in excess sludge fermentation liquor is reduced by 10% or above, and the influence of the fermentation liquor as a carbon source on biological phosphorus removal is alleviated.

An anaerobic lagoon wastewater treatment system, which includes a plurality of wastewater treatment zones. The treatment zones are either formed by providing a plurality of separate lagoons or by providing one or more partitioning elements within one lagoon. One or more treatment zones may also be provided in the form of a tank. The first wastewater treatment zone in the direction of wastewater flow has a smaller volume than the second wastewater treatment zone. Further, the first wastewater treatment zone achieves a significant reduction in fat, oil and grease removal, as well as in total suspended solids removal, but only a modest reduction in biological oxygen demand. An effluent from the first wastewater treatment zone is mixed with an effluent from the second wastewater treatment zone such that a predetermined ratio of carbon to nitrogen is maintained within the mixture of first and second effluents.

The invention relates to a liquid clarifier useful for removing solids suspended in a wastewater stream. Settled biological solids are taken from the clarifier and combined in a mixing chamber with a wastewater stream. The combined liquid is provided to a settling region of the clarifier, and suspended solids settle in a biological solids collection region, from which the solids are taken. Clarified liquid can be withdrawn or permitted to overflow from an outlet region in the settling region of the clarifier. The clarifier can enhance the degree of solids removal from wastewater streams having relatively low total suspended solids values, such as outlet streams from fixed film-type digesters. The clarifier is suitable for use in combination with other components of wastewater treatment systems, and can be included as a module in many kinds of wastewater treatment systems.

The invention relates to a method for improving the phosphorus release rate of iron phosphate-containing sludge during anaerobic fermentation. The method comprises the following steps: placing concentrated iron phosphate-containing sludge into a reactor; adding a certain amount of Na2S into the reactor according to the total content of suspended solids in the concentrated iron phosphate-containing sludge; closing the reactor for 5-10 days' anaerobic fermentation at 30-40 DEG C, so that a large amount of phosphorus can be released from the iron phosphate-containing sludge generated during chemical phosphorus removal, and especially the release of chemical phosphorus can be promoted. Compared with the prior art, the method provided by the invention has the advantages that the phosphorus release rate of the iron phosphate-containing sludge during anaerobic fermentation can be improved, the release of organics can also be promoted, the phosphorus recovery rate in the later period can be improved, and the sludge can be further recycled and reduced. Meanwhile, the defects that the accumulated concentration of phosphorus in a surplus sludge supernatant obtained according to a pure fermentation method is low, much biological phosphorus is released during anaerobic fermentation according to a pH adjustment method, but the release of chemical phosphorus during anaerobic fermentation according to the pH adjustment method is restricted, and released phosphorus is easy to re-precipitate can be overcome. The method is higher in operability and controllability.

The invention relates to a method for improving anaerobic fermentation phosphorus release rate of phosphorus-containing chemical-biological mixed sludge. The method comprises the following steps: placing the phosphorus-containing chemical-biological mixed sludge in a reactor, performing static settling at room temperature for 24h, and discharging supernatant fluid to obtain the concentrated mixed sludge; adding a certain amount of EDTA-2Na according to the content of total suspended solids in the sludge aiming at the chemical-biological mixed sludge produced by using different chemical reagents to remove phosphorus, maintaining the pH value in the anaerobic fermentation process of the mixed sludge at 6.5-7.5, closing the reactor and performing anaerobic fermentation for 5-10 days at the temperature of 30-50 DEG C. According to the method, a large amount of phosphorus in the chemical sludge produced by chemical phosphorous removal is released, the re-precipitation of phosphorous released by anaerobic fermentation of the sludge can be further prevented, and the phosphorous release rate of the mixed sludge can be further improved. Compared with the prior art, by adopting the method provided by the invention, the total phosphorous release rate of the phosphorus-containing chemical-biological mixed sludge can be improved so as to be conductive to improving the recovery rate of later-stage nitrogen and phosphorous resources, and the resource utilization of the remaining sludge can be realized.

The present invention belongs to the field of rain water/sewage treating environment engineering and ecological engineering technology, and is especially one rain water/sewage purifying biological and ecological filtering system and its operation process. The system consists of biofilters as environment engineering units and ecological filters as ecological engineering units. The biofilters can eliminate organic pollutant, ammonia nitrogen, suspended solid, etc from sewage and needs no aerator. The serially connected ecological filters have high treating effect, front settling tank to reduce the load of the subsequent ecological filters, and plant growing to further purify water. The present invention has the features of obvious water purifying effect, low running cost, environment friendship, water saving, etc. The treated rain water/sewage may be used in irrigation or for other purpose.

Disclosed are wastewater treatment systems and methods of treating wastewater. In particular, this disclosure provides a method of lowering the biological oxygen demand, total nitrogen, total suspended solids, and phosphorous within wastewater containing human excrements. In addition to improving the quality of the wastewater on a per Liter basis, this disclosure also provides methods and systems that reduce the absolute quantity of total nitrogen, total suspended solids, and phosphorous released into the environment through effluent. The disclosed methods and systems also provide ways of reintroducing water into the environment.

The invention discloses a method for pond culture of cynoglossus semilaevis gunther by means of the biofloc technique. The method comprises the steps of biofloc cultivation and breeding. In the biofloc cultivation process, aquaculture water is extracted to a cultivation unit; a carbon source and/or nitrogen source is added to a culture pond to enable the total content of carbon in water to be 5.5-45 mg/L, the total content of nitrogen in water to be 0.55-2.25 mg/L and carbon nitrogen ratio to be 10-20:1; water in the culture pond needs to be fully aerated, dissolved oxygen in water is maintained to be 5.5-8.5 mg/L, pH value is maintained to be 6-8, and temperature is maintained to be over 20 DEG C; when the total suspended solid in water in the culture pond reaches 100-500 mg/L, water is prepared for use. In the breeding process, cynoglossus semilaevis gunther is placed in the cultivation unit with released density being 10-150 pieces/m<2>. Compared with ordinary methods, the method has the advantages that water changing frequency is low, bait feeding amount is small, and obtained cynoglossus semilaevis gunther rarely gets sick and is high in yield.

The present invention provides a method of treating a commercial or industrial laundry wastewater stream. The method and apparatus treats a commercial laundry waste stream from a commercial washing machine or machines wherein the waste includes total suspended solids, chemical oxygen demand, biological oxygen demand, turbidity, and bacteria. The waste stream is transmitted to a first treatment unit that has a membrane filter that filters particles of between about 6 and 40 nanometers. At the first treatment unit, the waste stream is separated into a permeate stream and a retentate component. The retentate component is transmitted to a second treatment unit that filters particles of between about 3 and 10 nanometers. The permeate stream is then transmitted to a permeate holding vessel after treatment in the second treatment unit. The retentate component is placed in a mixing vessel where it is mixed with a polymer to form a solid waste.