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4985149 Anaerobic digestion method
Biological Waste Treatment and Pollution Control
4985149
The present invention provides an improved biological sludge dewatering process, The process comprises the steps of: (a) heating biological sludge to a temperature of about 90 degrees to about 150 degrees C. which corresponds to a pressure of about 0 to about 55 psig and retaining the biological sludge at that temperature for less than about 15 minutes; (b) centrifuging the heated biological sludge to isolate the solids of the heated biological sludge from the liquid of the heated biological sludge; (c) chemically conditioning the isolated solids; and (d) dewatering the conditioned solids to produce a high solids biological sludge. The present process is used for dewatering any biological sludge to produce a high solids cake. The resulting high solids cake may be used as landfill, incinerated, or used as fertilizer by spreading on land and plowing said fertilizer into the soil.
ANAEROBIC DIGESTION METHOD Yoshi Ohshima, Tsunekazu Watanabe, Keizaburo Watanabe, Noboru Nonoyama, Masayoshi Kitazume, Yukihiro Tomita, Tsukuba, Japan assigned to Public Works Research Institute Ministry of Construction; Kabushiki Kaisha Yakult HonshaFujita Corporati Sewage sludge or an agricultural or fish waste material is subjected to pretreatment in the form of wet mill treatment and then is subjected to anaerobic digestion. 4~5~3 MICROORGANISM CAPABLE OF GROWING IN 50% OR MORE ORGANIC SOLVENT
4988443 BIOREACTOR PROCESS FOR CONTINUOUS REMOVAL OF ORGANIC TOXICANTS AND OTHER OLEOPHILC SOLUTES FROM AN AQUEOUS PROCESS STREAM
Akira lnoue, Kouki Horikoshi, Tokyo, Japan assigned to Research Development Corporation New microorganisms belonging to Pseudomonas putida or Pseudomonas sp., which are isolated from soil and have tolerance to one or more of hydrocarbons, alcohols, ethers, ketones and their derivatives or their mixture. These new microorganisms can be used in the fields of bioreactor, liquid-waste treatment, protein engineering, etc.
Alan S Michaels, Steven W Peretti, Christopher J Tompkins assigned to North Carolina State University A hollow fiber membrane bioreactor process for continuous selective removal of organic toxicants or other oleophilic solutes present in an aqueous process stream wherein low concentration levels of .said toxicant are removed from the aqueous process stream by being extracted and concentrated by the permeably selective hollow fiber membrane and then provided to a microorganism for metabolization into a water soluble metabolite. The water soluble metabolite is prevented from reentering the aqueous process
4988442 PROCESS FOR DEWATERING BIOLOGICAL SLUDGE
OF
Ronald E Highsmith, Frederick J Good, Francis S Lupton, Kenneth P Kehrer, Glenn Petrie assigned to Polypure lnc 543
4985149
The present invention provides an improved biological sludge dewatering process, The process comprises the steps of: (a) heating biological sludge to a temperature of about 90 degrees to about 150 degrees C. which corresponds to a pressure of about 0 to about 55 psig and retaining the biological sludge at that temperature for less than about 15 minutes; (b) centrifuging the heated biological sludge to isolate the solids of the heated biological sludge from the liquid of the heated biological sludge; (c) chemically conditioning the isolated solids; and (d) dewatering the conditioned solids to produce a high solids biological sludge. The present process is used for dewatering any biological sludge to produce a high solids cake. The resulting high solids cake may be used as landfill, incinerated, or used as fertilizer by spreading on land and plowing said fertilizer into the soil.
ANAEROBIC DIGESTION METHOD Yoshi Ohshima, Tsunekazu Watanabe, Keizaburo Watanabe, Noboru Nonoyama, Masayoshi Kitazume, Yukihiro Tomita, Tsukuba, Japan assigned to Public Works Research Institute Ministry of Construction; Kabushiki Kaisha Yakult HonshaFujita Corporati Sewage sludge or an agricultural or fish waste material is subjected to pretreatment in the form of wet mill treatment and then is subjected to anaerobic digestion. 4~5~3 MICROORGANISM CAPABLE OF GROWING IN 50% OR MORE ORGANIC SOLVENT
4988443 BIOREACTOR PROCESS FOR CONTINUOUS REMOVAL OF ORGANIC TOXICANTS AND OTHER OLEOPHILC SOLUTES FROM AN AQUEOUS PROCESS STREAM
Akira lnoue, Kouki Horikoshi, Tokyo, Japan assigned to Research Development Corporation New microorganisms belonging to Pseudomonas putida or Pseudomonas sp., which are isolated from soil and have tolerance to one or more of hydrocarbons, alcohols, ethers, ketones and their derivatives or their mixture. These new microorganisms can be used in the fields of bioreactor, liquid-waste treatment, protein engineering, etc.
Alan S Michaels, Steven W Peretti, Christopher J Tompkins assigned to North Carolina State University A hollow fiber membrane bioreactor process for continuous selective removal of organic toxicants or other oleophilic solutes present in an aqueous process stream wherein low concentration levels of .said toxicant are removed from the aqueous process stream by being extracted and concentrated by the permeably selective hollow fiber membrane and then provided to a microorganism for metabolization into a water soluble metabolite. The water soluble metabolite is prevented from reentering the aqueous process
4988442 PROCESS FOR DEWATERING BIOLOGICAL SLUDGE
OF
Ronald E Highsmith, Frederick J Good, Francis S Lupton, Kenneth P Kehrer, Glenn Petrie assigned to Polypure lnc 543