Research at Fayette, Missouri on oxidation ponds has shown that the BOD in the treated effluent varied from 30 to 53 mg/l with loadings from 8 to 120 lb.

Since experience indicates that effluents from oxidation ponds do not create major problems at these BOD concentrations, the goal for the effluent quality of the accelerated treatment system was the same as from conventional oxidation ponds.

The BOD in the effluent averaged 58 mg/l, a 76-per-cent reduction over the 24-hr. period.

The periods of high effluent BOD occurred during cold periods when operational problems with the aerator resulted.

The BOD in the drainage ditch receiving the pilot plant effluent averaged 12 Aj.

The BOD of the effluent ranged from a minimum of 13 to a maximum of 47 mg. / l..

Microscopic examination of the effluent showed that minimum BOD occurred when the algae began to decrease with cold weather.

When the algae began to build up again, the effluent BOD rose.

However a final effluent of a sewage treatment works serving a large industrialised area might have a discharge where the ultimate BOD was much greater than the 5 day BOD because much of the easily degraded material would have been removed in the sewage treatment process and many industrial processes discharge difficult to degrade organic molecules.

This was the cornerstone 20: 30 ( BOD: Suspended Solids ) + full nitrification standard which was used as a yardstick in the U. K. up to the 1970s for sewage works effluent quality.

The United States includes BOD effluent limitations in its secondary treatment regulations.

Secondary sewage treatment is generally expected to remove 85 percent of the BOD measured in sewage and produce effluent BOD concentrations with a 30-day average of less than 30 mg / L and a 7-day average of less than 45 mg / L.

The regulations also describe " treatment equivalent to secondary treatment " as removing 65 percent of the BOD and producing effluent BOD concentrations with a 30-day average less than 45 mg / L and a 7-day average less than 65 mg / L.

This effluent has COD of 1, 50, 000 PPM and BOD of 60, 000 PPM and even more.

The wastewater effluent can also be a major source of pollution, containing lignins from the trees, high biological oxygen demand ( BOD ) and dissolved organic carbon ( DOC ), along with alcohols, chlorates, heavy metals, and chelating agents.

Not until much later was it realized that what had actually occurred was a means to concentrate biological organisms, decoupling the liquid retention time ( ideally, low, for a compact treatment system ) from the solids retention time ( ideally, fairly high, for an effluent low in BOD < sub > 5 </ sub > and ammonia.

The average volatile suspended solids in the effluent was 75 mg/l while MLSS averaged 170 mg/l volatile suspended solids.

Removal of the suspended solids by a membrane filter yielded an average effluent containing only 20 mg/l Aj.

Humidity does not play any role but the attraction is brought about purely by the agency of an effluent, by which the air is disturbed. After the initial impulse, the air returns to the amber again taking with it little particles.

This means that the chemical oxygen demand ( COD ) removed is relatively little and the effluent is therefore unacceptable for discharge into receiving waters.

Urban working-class housing in New Zealand in the 19th century was of poor quality, with overcrowding, flimsy construction, little public space, often-polluted water, and lack of facilities for disposal of rubbish or effluent.

This can save money in three ways: lower charges for lower water consumption, lower charges for the smaller volume of effluent water discharged and lower energy costs due to the recovery of heat in recycled wastewater.

The lack of hot effluent gases can significantly reduce kitchen heat loads, and reduce overall kitchen system costs by exchanging a major gas heat source for an appliance with lower hood requirements.

Orgreave was discharging effluent with 146 mg / l of ammonia in 1985, which needed to be around 70 per cent lower to improve the river quality to Grade D, but the plant closed in 1991, and water quality has improved dramatically since.

This is possibly as a result of treated effluent being discharged into the lower reaches.

The very low sulfur content of Bonny Light crude makes it a highly desired grade for its low corrosiveness to refinery infrastructure and the lower environmental impact of its byproducts in refinery effluent.

In spite of land-use planning and export of treated sewage effluent from the basin, the lake is becoming increasingly eutrophic ( having an excessive richness of nutrients ), with primary productivity increasing by more than 5 % annually, and clarity decreasing at an average rate of 0. 25 meters per year.

" ( c ) An effluent in order to comply with the general standard must not contain as discharged more than 3 parts per 100, 000 of suspended matter, and with its suspended matters included must not take up at 65 ° F ( 18-3 ° C.

Our experience indicated that in a large majority of cases the volume of river water would exceed 8 times the volume of effluent, and that the figure of 2-0 parts dissolved oxygen per 100, 000, which had been shown to be practicable, would be a safe figure to adopt for the purposes of a general standard, taken in conjunction with the condition that the effluent should not contain more than 3-0 parts per 100, 000 of suspended solids.

Less than 0. 8 % of AE remains and is released in effluent.

Waitara and the Waitara River. Although the freezing works had been the economic backbone of Waitara, for over 75 years the plants had discharged blood, waste and effluent from the slaughter houses, chains and tanneries directly into the Waitara River, less than 3 km from the sea, well within the tidal zone.

The American Public Health Association ( APHA ) recommends that lauryl tryptose broth should be used for the Mean Probable Number Presumptive Test of coliforms in waters, effluent or sewage as a confirmatory test of lactose fermentation with gas production for milk samples. Sodium lauryl sulfate inhibits organism other than coliforms.

The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline or when the differential pressure ( head loss ) across the filter exceeds a set value.

In the context of a thermal power station, the output of the cooling system may be referred to as the effluent cooling water, which is noticeably warmer than the environment.

In a large study treatment plants showed that they could significantly reduce the numbers of parasites in effluent, just by making adjustments to the currently used process.

Consequent to their study of recorded high total phosphorus levels causing the blooms and creating threats to wildlife and the recreational fisheries, the Commission prescribed interim management guidelines such as: Total cessation of aerial top dressing within of the eastern shore and of the western shore and around the flow sources in to the lake ; restrictions on fertiliser use for agriculture ; access to streams for spawning activities and to establish a " deer fence " on the northern end of the wetland ; stop all activities related to cultivation on the shores of the lake ; stop building of the hut settlements around the lake ; install individual household effluent storage or septic tanks ; and diversion of sewage outside the catchment.

A skimming device at the effluent weir prevented loss of most of these light solids.

It rises as the effluent of the Rhône Glacier in Valais, Switzerland, in the Saint-Gotthard massif, at an altitude of 1753 m. It is joined by the river Saône at Lyon.

The Rhone rises as an effluent of the Rhone Glacier in Valais, in the Swiss Alps, at an altitude of approximately.

This was also directed at poisonous effluent generated by the plant operations.

By 1974, a modest improvement in water quality had been achieved by treatment of industrial effluent, and some fish managed to exist below the weir at the Star Paper Mill in Barnsley.

Water volumes are affected by the reservoir at Crowdy Marsh, by abstraction of water for public supply, and by effluent from the sewage system around Bodmin.

However, the use of highly processed and recycled effluent from the city ’ s sewage treatment plant, located at the beach some miles away to the south near the San Francisco Zoo is planned for the near future.

They appear in the effluent, usually at levels lethal to invertebrates.

Typically, the effluent from constructed wetland receiving near-neutral water will be well-buffered at between 6. 5-7. 0 and can readily be discharged.

For sewage, it operates an effluent tunnel in Boston Harbor for treated sewage as well as a treatment center on Deer Island at the mouth of the harbor, among other properties.

In the UK it is found at three sites: Tilbury, Anglian water, treating a wastewater with a high industrial contribution ; Southport, United Utilities, because of land space issues ; and Billingham, ICI, again treating industrial effluent, and built ( after the Tilbury shafts ) by ICI to help the agent sell more.

Heavy rainfall often caused pools at the springs to close due to contamination from runoff and sewer lines, the effluent of the affluent upstream subdivisions entering the Edwards Aquifer recharge zone which feeds the springs.

West Basin Municipal Water District purchases approximately 37, 600 AF, or roughly 9 percent of Hyperion ’ s secondary effluent for treatment at the Edward C. Little Water Recycling

Around the industrial region centred at Webuye, the river absorbs a lot of effluent from the paper and sugar factories in the area.