 Process for promotion of microbial consumption of waste water fats |
| What is claimed is: 1. A process of purifying household or industrial establishment waste water ... |
|
| Waste treatment and water recycling toilet system |
| The present invention relates to improvements in waste treatment and water recycling toilet systems,... |
|
| Skimmer mechanism for rectangular basin chain and flight |
| In accordance with the present invention, a chain and flight mechanism is disclosed which includes ... |
|
| Photocatalytic treatment of water for the preparation of ultra pure water |
| OF THE INVENTION This invention is widely applicable for the purpose of removing a small amount, ... |
|
| Method and apparatus for aerobically treating wastewater |
| OF THE INVENTION In the accompanying drawings which form a part of the specification and are to be ... |
|
| Clarifier bubble generation and distribution nozzle |
| OF THE INVENTION In the various figures, like parts are referred to by like numbers. Referring to ... |
|
| Method and apparatus for treating organic wastewater |
| Referring now to the drawing of the apparatus, all standard components shown, such as the valves, ... |
|
| Method and apparatus for treating organic wastewater |
| Referring now to the drawing of the apparatus, all standard components shown, such as the valves, ... |
|
| Method for improving bubble surface area exposure |
| Prior art FIG. 1 discloses diagrammatically a vessel a containing a liquid b having therein a gas-... |
|
|
Anaerobic filter
| Details |
Inventors: Blay, George A.; Witt, Enrique R.;
Assignee: Celanese Corporation (New York, NY)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
In the operation of a recycling anaerobic filter for treating aqueous waste streams, the rate of production of methane is measured continually at frequent intervals and the COD feed rate is varied to maintain a predetermined, timed, relationship between that varied feed rate and the measured methane production rate. |
|
DETAILED DESCRIPTION The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1.
Process for the treatment of an organic waste-water stream containing COD in a recycling anaerobic filter which contains methanogenic bacteria, operates at a COD feed rate, OL, which is at least 0.
5 lb COD/cu.
ft.
/day and at a recycle ratio of at least 2:1, and produces a stream of gas comprising methane, wherein the improvement comprises continually carrying out an alternating sequence of steps at least once per hour, the steps of said sequence comprising, (a) a step of measuring the rate of production of methane in said gas stream and thereby determining the rate, KL, at which COD is removed from said filter as methane, and (b) a step of setting the COD feed rate, OL, in lbs.
COD/cu.
ft.
/day, to said filter at a numerical value which is larger than the KL, in lbs.
COD/cu.
ft.
/day, determined in said step a and which is related to said KL according to a predetermined mathematical formula, the numerical value of OL set in each step b of said sequence being related by the same predetermined formula to the respective value of KL determined in the corresponding preceding step a of said sequence, said recycle ratio being the ratio of the volumetric flow rate of the recycled liquid to the volumetric flow rate of the fresh feed.
2.
Process as in claim 1 in which said sequence of steps is carried out at least once per 15-minute period.
3.
Process as in claim 1 in which said alternating sequence is effected so frequently that the magnitudes of OL changes are each less than 10%, and in which the recycle ratio is at least about 4:1 and less than 15:1.
4.
Process as in claim 3 in which the formula is (KL/OL)=C where C is a constant.
5.
Process as in claim 1 in which the formula is: OL-KL=C where C is a constant.
6.
Process as in claim 1 in which the formula is (KL/OL)=C where C is a constant.
7.
Process as in claim 6 in which C is less than 0.
9.
8.
Process as in claim 1 in which said alternating sequence is followed by another alternating sequence according to claim 1, the mathematical formula for the latter sequence being different from that of the former sequence
|
| Related patents |
|
|
Process and system for treating waste water
It is a primary object of this invention to provide an improved process and system for the treatment of raw or primary waste water using a combination powdered, ...
|
|
|
Compact electrocatalytic sewage treatment unit for maritime use
It is a primary object of this invention to provide a compact, relatively small low-weight unit for treatment of wastewater by electrocatalytic means, primarily for ...
|
|
|
Apparatus for separating mixtures of liquids of different specific gravities, etc.
What I claim is: 1. Shipboard apparatus for separating a mixture of immiscible liquids having different specific gravities while avoiding turbulences due to ship motion, ...
|
|
|
Intumescent compositions obtained by reacting polyisocyanates with phosphorus-containing products, polyesters and cyanuric acid and/or cyanuric acid derivatives
What is claimed is: 1. Intumescent compositions, which may be foamed, and which are obtained by reacting: (1) polyisocyanates with (2) phosphorus-containing condensation ...
|
|
|
Optionally foamed intumescent masses prepared from polyisocyanates, hydroxyl compounds and melamine phosphates
OF THE INVENTION According to the invention, it is preferred to use intumescent masses which have been obtained by the reaction of from about 10 to 70 parts by weight ...
|
|
|
Method of manufacturing modified wood material
What we claim as our invention is: 1. A method for making a modified wood material, comprising alternately immersing a raw wood material in two types of solutions, a ...
|
|
|
Cable clamp
What is claimed is: 1. Cable clamp means for securing a cable to an adjacent structure comprising: first and second identical clamp members each adapted to be positioned ...
|
|
|
Haze-free infrared-reflecting coated glass
We claim: 1. A method of forming a tin oxide coating comprising contacting a surface of a substrate in an oxidizing atmosphere with a mixture consisting essentially of ...
|
|
|
Ozone generator
Having now described my invention and the manner in which it may be used, I claim: 1. An ozone generator comprising: (a) an elongated hollow housing closed at both ends, ...
|
|
|
Method for treatment of biochemical waste
What is claimed is: 1. A method for the treatment of a biochemical waste slurry, with the biochemical waste selected from the group of sewage sludge and garbage, ...
|
|
|
Liquid Purification 
