56 results about "Fecal coliform" patented technology

The invention belongs to the technical field of waste water multilevel processing and particularly relates to a method and a system for combined air stripping biogas slurry depth treatment and biogas purification and desulfurization. Under the regulation of an additive, high-concentration ammonia nitrogen in the biogas slurry is removed by recycle gas through an air stripping mode, the gas after the air stripping is absorbed through acid liquid and serves as ammonium fertilizer to be applied, the use added value of the biogas slurry is improved, the system operation cost is reduced, the additive is added in an air stripping device, phosphorus and organic matters in the biogas slurry are subjected to flocculating settling, and the biogas slurry serves as slow release fertilizer to be applied after being collected and processed. Fecal coliform in the biogas slurry is eliminated effectively, the waste heat is used for heating the air stripping device, the air stripping efficiency of ammonia nitrogen is improved, and the optimized use of the system heat is improved. The biogas slurry after air stripping and sterilization is directly used for absorbing hydrogen sulfide and carbon dioxide in biogas, the biogas purification and desulfurization can be achieved, and the potential of hydrogen (PH) and the hardness of the processed biogas slurry can be reduced.

Plant-derived oils, carvacrol and thymol, when added to human or animal waste reduce the production of gas and short-chain volatile fatty acids, and the viability of total anaerobic bacteria and fecal coliforms. In an embodiment, carvacrol or thymol are combined with eugenol.

The invention discloses an urban domestic sludge treatment process.The process includes the following steps of 1 preparation of dewatered sludge, wherein sludge which is concentrated and dewatered by an urban sewage treatment plant is adopted; 2, conditioning of sludge, the dewatered sludge is conveyed to a slurry regulating pool, a chemical conditioning agent is added, and the mixture is stirred and mixed to be uniform through a stirrer in the regulating pool; 3, slurry radiation treatment, wherein slurry obtained after chemical conditioning is conveyed to a radiation workshop through a conveyor belt for radiation treatment; 4, slurry low-temperature pyrohydrolysis; slurry obtained after radiation treatment is beaten into a reaction kettle through a slurry conveying pump, a reaction kettle keeps closed in the work period, after slurry enters the reaction kettle, the temperature is raised continuously in the continuous stirring process, when the temperature is raised to 85-95 DEG C, timing is started, and the temperature is maintained at 90 +/-5 DEG C for 30-35 minutes; 5, slurry obtained after low-temperature pyrohydrolysis can be directly dewatered through a membrane filter press, the moisture content is lowered to 60% or below, the number of fecal coliform groups is smaller than or equal to 100/g (mL), the slurry obtained after low-temperature pyrohydrolysis can also be combined with anaerobic digestion which has been developed and matured for stabilizing treatment, and methane gas utilization is achieved.

A method for reducing fecal coliforms in waste water wherein the flow of water is directed through a reactor having removable cover, inlet and outlet, two UV lamps, six irradiating chambers, each interconnected by apertures, a UV lamp control box, and a heat a conducting pipe to transfer heat from the control box into the flowing water.

The invention provides a method for preparing high-quality biological organic fertilizer through municipal sewage sludge. The method includes the steps of raw material preparing, fermented material preparing, sterilization, anaerobic fermentation, fermentation promoter injection, aerobic fermentation and finished product preparing. Anaerobic fermentation agents used in the anaerobic fermentation step contain methane thermophilic micrococcocci, lactobacillus planetarium, metallophilic thermoanaerobacter ethanolicus and white high-temperature actinomycetes. Aerobic fermentation agents used in the aerobic fermentation step contain trichoderma reese, lactobacillus delbruckii and vibrio proteolyticus. According to the prepared bio-organic fertilizer, the number of fecal coliform bacteria ranges from 23 to 26 per g, the death rate of ova of roundworm ranges from 99.2% to 99.8%, and the number of effective living bacteria ranges from 440 millions CPF/g to 52 millions CPF/g.

A bacteria deactivation device that has a porous medium through which water and bacteria contained in the water, like E. coli and fecal coliform, are passed. Colloidal silver within the medium deactivates bacteria that pass therethrough. The medium has a porosity up to 80% and pores sized to provide flow rates up to 8 liters per hour while meeting Environmental Protection Agency limits for human consumption of silver.

The invention discloses a biological organic fertilizer and a production method thereof, and belongs to the field of fertilizers. The biological organic fertilizer contains the following components: more than or equal to 20 million active living bacteria per gram, more than or equal to 45% of organic matters, more than or equal to 5% of total nutrient, less than or equal to 30% of water, and less than or equal to 100 fecal coliform per gram, and has the pH of 5.5-7, wherein the death rate of roundworm ova is more than or equal to 90%, and the validity period is more than or equal to 12 months. The biological organic fertilizer has the effects of a microbial fertilizer and an organic fertilizer, and can change wastes into valuable and protect the environment; and the production method can effectively shorten the production period and reduce the production cost.

A portable, non-filtering, microorganism deactivation device for treating water contaminated with harmful bacteria such as E. coli and fecal coliform, includes a housing, said housing containing a high porosity media saturated with an ionically charged material such as colloidal silver.

Sorbents prepared according to the invention useful in remediation of polluted effluents including waste waters and other fluids such as air, the invention is particularly directed to use of sulfidized red muds in treatment of sanitary waste waters to substantially remove or reduce bacterial levels such as fecal coliform as well as phosphates and total dissolved solids (TDS). The sulfidized red mud sorbents of the invention are derived by sulfidation of red mud, a waste product of Bayer processing of bauxite ores, red muds being sulfidized by reaction with sulfidizing agents including H2S, NA2S, K2S, (NH4)2S and CaSX as examples. Sulfidized red muds used according to the invention typically exhibit a sulfur content from about 0.2 to about 10% above residual sulfur in the red mud used as the starting material for preparation of the sulfidized red mud sorbents used in the presently disclosed methods.

A porous grog with a body composition of water, clay and combustible material. Further, an earthenware water purification filter utilizing the porous grog in the body composition of the filter. Further, an earthenware filter utilizing silver chloride treatment for water disinfection is disclosed. A water purification system incorporating said filter, said water purification system capable of removing about 99% of all particles not less than 1.0 micron is size, and removing virtually 100% of fecal coliform indicators. In other embodiments, methods of disinfecting pottery toilet liners including various open surfaces using silver chloride treatment are disclosed.

The invention discloses a fecal coliform chromogenic culture medium and application thereof, belonging to the technical field of medical inspection. The fecal coliform chromogenic culture medium is composed of 10-20 g/L peptone, 2-4 g/L animal tissue digested substance, 5-15 g/L lactose, 0.5-1.5 g/L bile salt, 0.2-0.4 g/L lauryl sodium sulfate, 0.03-0.06 g/L bromocresol purple, 1-3g of lecithin, 10-15 g/L Tween 80 and the balance of deionized water. The pH value is 7.4+/-0.2. The culture medium is used for detecting fecal coliform in cosmetics, and has the advantages of high detection sensitivity and high specificity; the culture medium can be used for identifying the strain according to the color, so the detection period is short, and the culture medium is suitable for treating massive samples; and the culture medium can easily implement industrialized production, can be used for carrying out comprehensive, systematic and accurate detection and preliminary identification on fecal coliform in cosmetics, and provides a new way for cosmetic detection.

The invention discloses a disinfection method of recycled water, which is used for remote combined disinfection by using ultraviolet rays and chlorine dioxide. The disinfection method comprises the following steps: disinfecting recycled water with ultraviolet rays at first and then remotely disinfecting the ultraviolet-disinfected recycled water by using chlorine dioxide. According to the disinfection method, an ultraviolet disinfection method is combined with a chlorine dioxide disinfection method, so that the sterilizing capability is improved, the defects of independent ultraviolet disinfection are overcome, the dosage of a chlorine dioxide chemical preparation is reduced, and the potential risk of chlorine dioxide disinfection is lowered; due to use of the chlorine dioxide disinfection, the defect that the ultraviolet disinfection cannot realize continuous disinfection is overcome, and thus the disinfection capability of the system is further improved; moreover, fecal coliforms in a disinfected water body nearly cannot be photo-reactivated within 48 hours and are gradually reduced as time goes by, and the inactivation rate of the fecal coliforms and total bacteria in the recycled water is increased, so that the water quality safety of the recycled water in a recycling process can be ensured.

The invention discloses a movable type high-performance integrated machine for sludge treatment, and belongs to the field of sludge treatment equipment technology. The integrated machine is composed of a stacked spiral sludge dewatering machine, a doser, and a sludge conveyer; an outlet of the doser and an outlet of the sludge conveyer are connected to an inlet of the stacked spiral sludge dewatering machine. The integrated machine for sludge treatment employs the stacked spiral sludge dewatering machine with low operation cost, and the cost is less than 40% of the operation cost of a belt filter press and is less than 20% of the operation cost of a centrifugal hydroextractor; the integrated machine saves power, and the consumed electricity is less than 5% of the consumed electricity of a centrifuge; the integrated machine saves water, and the consumed water is less than 0.1% of the consumed water of the belt filter press; the integrated machine saves chemical medicines, and saves 60% of chemical medicines on average; the integrated machine has a small volume, a dehydration machine room saves 60% or above of the investment, a modifier does not change original properties of the sludge, the machine has effects for removing ova of roundworm and fecal coliform in the sludge, and the machine has a stabilization effect for heavy metals.

A test medium and method for detecting, quantifying, identifying and differentiating up to four (4) separate biological materials in a test sample. A test medium is disclosed which allows quantifying and differentiating under ambient light aggregates of biological entities producing specific enzymes, which might include general coliforms, E. coli, Aeromonas, and Salmonella in a single test medium. A new class of nonchromogenic substrates is disclosed which produce a substantially black, non-diffusible precipitate. This precipitate is not subject to interference from other chromogenic substrates present in the test medium. In one embodiment, the substrates are selected such that E. coli colonies present in the test medium show as substantially black, general coliforms colonies show in the test medium as a blue-violet color, Aeromonas colonies present in the test medium show as a generally red-pink color, and Salmonella colonies show as a generally teal-green color. Other microorganisms and color possibilities for detection and quantification thereof are also disclosed. An inhibitor and method for making a test medium incorporating the inhibitor are disclosed.

The invention discloses pepper organic fertilizer based on stillages and a production method of the pepper organic fertilizer. The pepper organic fertilizer is prepared from the components in parts bymass: 90 parts of stillages, 6-8 parts of straws, 2 parts of mineral powder, 3-5 parts of quick lime and 0.2-0.3 part of a culture. According to the method for producing the stillage organic fertilizer, the fermentation time is short, the temperature is controllable, and the method is suitable for cultivation of pepper crops. The stillage organic fertilizer obtained by the method is prepared formthe components in percentage: 80% of organic matter, 3.78% of N, 2.0% of P2O5, 1.68% of K2O and 7.46% of total nutrients, wherein the pH is about 6.5, and the moisture content is 28%. The mortality of roundworm eggs and fecal coliform group number indexes meet the requirements for the executive standard (NY884-2012) of a bio-organic fertilizer.

The invention discloses a landscaping substrate and a preparation method thereof. The substrate is prepared from the following components in percentage by weight of 20-30% of dry chicken manure, 20-30% of dry pig manure, 20-30% of dry cow dung, and 10-40% of straw. The preparation method comprises the following steps of performing crushing, promoting decay, and performing fermentation so as to further obtain the landscaping substrate. The landscaping substrate can loose soil, promote seedling growth, increase the survival rate of plants, and besides, is high in water storing performance, so that plant growth is facilitated, pollution is reduced, the technology is simple, and harmless treatment is not needed. After decay promoting treatment, the kill ratio of fecal coliform bacteria, coliform bacteria and salmonella in manure achieves 100%, so that standard requirements of China and the Ministry of Agriculture of China are met.