LAWRENCE K WANG
Water and Wastewater in Newtonville, NY

5068031, Nov 26, 1991

Jul 6, 1990

7/549413

Lawrence K. Wang - Latham NY
Mu H. S. Wang - Latham NY
Chong S. Hwang - Flushing NY
Harold Rhow - Hartsdale NY

Int'l Environmental Systems, Inc. - Pittsfield MA
Globe Environmental Protection, Inc. - Flushing NY

C02F 1114

210 961

A sludge treatment multi-stage process and apparatus thereof for sludge concentration and liquid stream treatment which includes chemical feeding, static mixing, chemical monitoring and optimization, built-in gas pressurization, hydraulic flocculation, grit settling, multiple stage upward flotation thickening, downward gravity thickening, and final magnetic or electrical treatment to produce a highly concentrated sludge slurry and a treated effluent. A majority of floated, settled and thickened sludges are collected by a travelling combined scooping-scraping means and subsequently dewatered and dried and all necessary unit processes and unit operations are incorporated into an apparatus with common walls and drive mechanisms for improving the sludge and water treatment efficiency, reducing secondary pollution caused by scums/sludges, and eliminating the needs of a separate mixer, monitor, flocculator, pressure vessel, flotation thickening clarifier, gravity thickening clarifier, aerator, biofouling preventor, scale controller, corrosion controller, and multiple apparatus for various modes of operations.

5275732, Jan 4, 1994

Dec 2, 1992

7/984319

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - North Port FL
Mu Hao S. Wang - Latham NY

International Environmental Systems, Inc., USA - Latham NY

C02F 124, C02F 120, C02F 302, C02F 900

210601

A high rate multi-stage bubble separation process is developed for: (a) initially generating coarse gas bubbles with diameters greater than 80 microns in turbulent hydraulic condition to mix an influent water with chemicals, enzymes, microorganisms, or combinations thereof, to produce chemical flocs, biological flocs or both, and to strip volatile contaminants from water; (b) subsequently terminating coarse gas bubbles and generating extremely fine gas bubbles with diameters smaller than 80 microns in laminar hydraulic condition to float suspended, oily and surface-active contaminants together with said chemical flocs and said biological flocs from water, to settle heavy contaminants from water, and to produce a clarified effluent water, a floating scum, and a sludge; (c) terminating the fine gas bubbles and discharging the clarified effluent water; (d) discharging the floating scum and the sludge upon demand; and (e) optionally collecting and treating an emitted gas stream resulting from said coarse gas bubbles and said fine gas bubbles.

5122165, Jun 16, 1992

Jun 11, 1991

7/715992

Lawrence K. Wang - Latham NY
Orest Hrycyk - Syracuse NY
Lubomyr Kurylko - New Providence NJ

International Environmental Systems, Inc. - Pittsfield MA

B01D 1900, B01D 5304

55 38

A process system and apparatus for removal of toxic volatile organic compounds (VOCs), volatile inorganic compounds (VICs) and surfactants from a contaminated liquid stream, more particularly groundwater, by a combination of pH adjustment, chemical reaction, ultraviolet reaction, gas stripping, scrubbing, adsorption and regeneration is described. This process system involves liquid pumping; liquid treatment in an enclosed dispersed gas stripping chamber; gas purification by a foam collector, a wet scrubber and a self-generative gas-phase granular activated carbon (GAC) contactor; and recycling of GAC-purified gas for further liquid treatment by dispersed gas stripping. The process system is extremely cost-effective for removal of VOCs, VICs, and surfactants, and eliminates the problem of secondary gas contamination caused by conventional air stripping towers.

5167806, Dec 1, 1992

May 29, 1991

7/708777

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - New Providence NJ
Mu H. S. Wang - Latham NY

International Environmental Systems, Inc. - Pittsfield MA

B01F 304, C02F 900, C02F 1114, B01D 17035

210188

An improved gas dissolving and releasing liquid treatment system involving the use of multi-stages gas dissolving pressure vessel and the use of a pressurized water release assembly and an open vessel is described. The gas dissolving and releasing liquid treatment system includes a liquid pressure pump, a pressure vessel, a gas injector, an inlet nozzle assembly, a gas compressor, gas regulators, gas flow meters, pressure gauges, a safety valve, a bleed-off point, feeders, pumps, a pressurized water release unit, a liquid flow meter, an open vessel, sludge removal means, and air emission control means. More than one gases introduced at different inlets are dissolved simultaneously and efficiently in the pressure vessel under controlled high pressure and high rotating velocity. The improved liquid treatment system is compact, simple and cost-effective, and is applied to ozonation, chlorination, recarbonation, oxygenation, bio-oxidation, nitrogenation, aeration, and flotation processes. Chemicals and/or microorganisms are dosed to the present invention to facilitate the required chemical and/or biochemical reactions for liquid treatment.

5232584, Aug 3, 1993

Aug 17, 1992

7/929987

Lawrence K. Wang - Latham NY
Mu H. S. Wang - Latham NY

International Environmental Systems, Inc., USA - Latham NY

B01D 5334, B01D 5314, B01D 1114, B01D 3364

210139

The present invention relates to a multi-stage, single reactor, purification system for disinfecting, washing, and concentrating solid wastes, which include contaminated soil, highly concentrated biosolids, spent animal bedding, and spent diapers, etc. A solid waste is fed into the reactor of this invented apparatus. At least one disinfecting and chemical agent (including cationic surface active agent known as quaternary ammonium compound) is fed together with water (as needed) into this reactor to disinfect and process said solid waste with the assistance of a mechanical mixing means inside said reactor. A disinfecting gas is fed to the same reactor as needed. After the period of feeding, disinfecting, processing, and mixing is over, the process water is drained. The disinfected and processed wet solid waste is discharged to an expulsion chamber means which removes residual water and compacts the disinfected and processed solid waste. The drained process water and the removed residual water are discharged either into a municipal sewer system for proper disposal, or into a chemical neutralizer means for pretreatment before its sewer discharge, or for production of a fertilizer aid containing nitrogen and phosphorus.

5256299, Oct 26, 1993

Jul 2, 1990

7/547505

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - New Providence NJ

International Environmental Systems, Inc., USA - Latham NY

C02F 900

210664

An improved method and apparatus for purifying liquid in a square or rectangular tank involving ultra violet (UV) treatment, oxidation, flotation, filtration, effluent purging and disinfection is described. The liquid to be treated is fed into the mixing chamber of the apparatus in the presence of UV light and an oxident (ozone and/or hydrogen peroxide), and then discharged into the flotation chamber for gas stripping of volatile organic compounds (VOC) and flotation removal of floating substances. The subnatant in flotation chamber flows downward through multiple automatic backwash liquid phase granular activated carbon (GAC) filters for final polishing before being discharged as the liquid effluent or further disinfected. The flotation chamber is hooded for collection of gas stream which is moved by a gas mover and purified by a gas phase granular activated carbon (GAC) filter. The gas effluent from said gas phase GAC filter is recycled to said flotation chamber for reproduction of gas bubbles, and elimination of secondary air pollution.

5240600, Aug 31, 1993

Jun 1, 1992

7/891826

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - New Providence NJ
Mu H. S. Wang - Latham NY

International Environmental Systems, Inc., USA - Latham NY

C02F 322, C02F 326, C02F, B01F 304

210188

A biological treatment system involving the use of a gas dissolving pressure vessel, a pressurized water release assembly, a pretreatment chamber, a bioreactor, an open vessel, a post-treatment unit, a sludge removal unit, and a removable gas collection and purification unit for both wastewater treatment and air emission control is described. Gases are dissolved efficiently in a water inside the pressure vessel under controlled high pressure and high rotating velocity. Chemicals, or microorganisms, or both arm dosed to an influent water producing a pretreated water containing chemical flocs and biological flocs. The bioreactor comprising a hanging biological contactor is adopted when biochemical reaction is intended. A pressurized water containing supersaturated gases is produced in the pressure vessel and than depressurized through the pressurized water release assembly becoming a depressurized water containing micro bubbles. The pretreated water containing chemical flocs or biological flocs, or both are gently mixed and held together with the depressurized water containing micro bubbles in the open vessel for separation of chemical/biological flocs to the water surface, producing a purified effluent and a waste gas.

5069783, Dec 3, 1991

May 16, 1990

7/523891

Lawrence K. Wang - Latham NY
Mu H. S. Wang - Latham NY
Chong S. Hwang - Flushing NY
Harold Rhow - Hartsdale NY

Int'l Environmental Systems, Inc. - Pittsfield MA
Globe Environmental Protection, Inc. - Flushing NY

C02F 128

210196

A liquid treatment multi-stage process and apparatus thereof for removing dissolved, colloidal, volatile, suspended and living contaminants from water, wastewater or sludge streams which includes chemical feeding, static mixing, gas pressurization, hydraulic flocculation, sedimentation, flotation, adsorption, filtration and disinfection by converting dissolved solids to insoluble forms by oxidation and chemical precipitation, coagulating and clarifying colloidal substances and microorganisms, adsorbing, filtering and disinfecting the remaining contaminants in the liquid to produce a purified liquid. A majority of insoluble suspended particles in the liquid are collected by sedimentation and flotation separation procedures and subsequently dewatered and dried and all necessary unit processes operations are incorporated into an apparatus with common walls and drive mechanisms for improving the liquid treatment efficiency, reducing secondary pollution caused by scums/sludges, and eliminating the needs of a separate mixer, flocculator, pressure vessel, aerator, adsorber, filter, clear well and chlorinator.

5451320, Sep 19, 1995

Jul 10, 1990

7/550515

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - New Providence NJ
Orest Hrycyk - Syracuse NY

International Environmental Systems, Inc., USA - Latham NY

C02F 312

210604

A physical-biochemical process system and apparatus for removal of toxic volatile organic compounds (VOCs) and other organics from contaminated groundwater or wastewater is described. This process system involves influent pumping groundwater or wastewater treatment by air stripping, biological oxidation and powdered activated carbon (PAC) adsorption in an enclosed gas stripping bioreactor, air purification by granular activated carbon contactor, and recycling of GAC-purified air for further groundwater or wastewater treatment. The bioreactor effluent is processed processed by a clarifier, a filter and a disinfection unit. The clarifier sludge is partially recycled to the bioreactor and partially wasted. The process system is cost-effective and eliminates the problem of secondary air contamination caused by conventional gas stripping tower and coventional biological treatment processes.

5236595, Aug 17, 1993

Jul 2, 1992

7/908297

Lawrence K. Wang - Latham NY
Lubomyr Kurylko - New Providence NJ
Mu H. S. Wang - Latham NY

International Environmental Systems, Inc., USA - Latham NY

C02F 900

210669

An improved filtration system involving the use of ultraviolet irradiation, ozonation, chlorination, reactive filtration media, chemical treatment, compressed air aeration, air emission control, and central flow control is described. The process system and apparatus of the present invention mainly include a liquid pump, an ultraviolet pretreatment means, a central flow control, an air emission control means, a reactive pressure filter, a process tank, at least one chemical feeder means, an ultraviolet post-treatment means, and an aeration means. The filter media are of reactive type, including diatomaceous earth, granular activated carbon, fibrous activated carbon, granular metal medium, greensand, neutralizing sand, silica sand, activated alumina, ion exchange resins, polymeric adsorbents, chemical treated adsorbents, manganese oxide, coal, porous plastic medium, porous stainless steel medium, porous ceramic medium, bacteriostatic filter medium, porous paper filter medium, porous carbon filter medium, coalescing filter medium, fiberglass filter medium, or combinations thereof. The process tank contains and handles regenerating chemicals, flocculating chemicals, filter aids, or recirculating water. The reactive filter media of this invention are regenerated by either chemical reactions or aeration for reuse to prolong the filter media's service life and to reduce the operation and maintenance costs.