Wastewater and Sewage Microorganism – 3 Parasites Incidental to Wastewater and Sewage Disinfection

November 5, 2011 By Leave a Comment
Schistosoma mekongi

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Various  spherical worms parasites and flatworms can be transmitted to humans by means of ingesting contaminated water. A single mature larva (or fertilized eggs) can lead to infection and these parasites are relatively durable.

To keep away from the condition due to schistosome, the drinking water might be saved for forty eight hours and as a result rendered safe. Slow sand filters can eliminate the greater part of cercariae (if appropriately operated) and disinfection with residual chlorine of .5 mg/l for one hour will destroy cercariae of the human schistosomes. We recommend chlorination in any event.

A sounder strategy is to get rid of host snails which are inclined to fecal contamination and to other microorganisms in wastewater. The grandmother’s strategy of boiling and filtering will usually function in opposition to contaminating wastewater microorganism species.

Rotifiers

Rotifers are multicellular animals that can take in small particulates as effectively as bacteria and algae between other sewage microorganism species. The rotifers can attach themselves to flock particles and graze on the bacteria on the flock surface. Due to the fact of their significant measurement, protozoa and rotifers and related microbes in wastewater are very easily acknowledged under the microscope and are usually utilized as indicators of the biochemical qualities of wastewater remedy techniques.

The rotating movement of the cilia located on the head of the organism is a sure method to identify the bacteria.  Metabolically, rotifers can be labeled as aerobic chemoheterotrophs.

Crustaceans

Like rotifers, crustaceans are aerobic chemoheterotrophs that feed on wastewater microorganism species like bacteria and algae. These difficult-shelled, multi-cellular animals are a source of foods for fish. (Crabs and lobsters are crustaceans).

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Sewage Wastewater Treatment – Disinfection Via Chlorine UV and Ozone

November 4, 2011 By Leave a Comment

 

Article by Hardboss

In wastewater treatment, the effluent sewage stream is sometimes disinfected. Disinfection is accomplished, generally, by either using contact

Clean drinking water...not self-evident for ev...

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chlorination, ultraviolet (UV) processes or by applying Ozone. Disinfection is generally required if the waste stream has the potential to come into contact with the general population, or drinking water supplies. The overall goal is to reduce the infection risk to the surrounding population.

Chlorine Disinfection

 

The least expensive and most common type of disinfection is by chlorination. Generally, the wastewater stream passes over chlorine tablets (known as contact chlorination) which increases the chlorine concentration in the wastewater. The increased chlorine concentration is very effective in killing most harmful pathogens.

The second type of contact chlorination is a batch process. In batch application(s), the wastewater fills a large tank, where sufficient chlorine is added to kill most pathogens. In batch processing, the chlorine is added manually as a powder or as chlorine gas.

In sensitive areas, the chlorinated wastewater stream can be passed through de-chlorination tablet feeders to neutralize the chlorine prior to discharge. One disadvantage is that salts are introduced into the environment via the chlorination/de-chlorination process.

Ultraviolet Disinfection

Ultraviolet disinfection (UV) uses no chemical in the treatment, and the treated water is not subjected to the salts produced in chlorination processes. One significant disadvantage is that the UV disinfection systems require constant maintenance and a power source. UV light bulbs or windows must be cleaned regularly and bulbs replaced.

Ozone Disinfection

Third type of chlorination method is Ozone. Ozone if a very effective and fast-acting disinfection method. Generally, the Ozone is produced onsite and is introduced into the waste stream. Ozone disinfection requires higher power supplies to run, but is relatively safe. Maintenance requirements complicates the Ozone process and its reliability.

We recommend using Chlorination tablet feeders and the applicable Chlorine tablets to disinfect most wastewater streams. We feel that the NORWECO Chlorine tablet feeders, and the NORWECO Disinfection tablets are the best on the market. Please visit our online store for pricing.

 

 

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Commercial Wastewater Pumping Stations Review of Bio-microbics’ BioSTEP® and NORWECO

October 2, 2011 By Leave a Comment

 

Article By Bruce Hardboss, PE

 

 

BioSTEP® screened pumping schemes are versatile ticker packet designed to transferral screened liquid in numerous size-diam, decentralized accumulation applications. BioSTEP® is a registered trademark of Bio-MICROBICS.  Bio-MICROBICS claims the following; “BioSTEP® screened pumping systems are designed so that once installed, all normal operation and maintenance can occur without the messy removal of system components. BioSTEP screened pump vaults utilize the patented SaniTEE® screening technology to screen and deflect solids rather than collect and hold them like other filtering technologies. ” (see http://www.biomicrobics.com/?p=67&s=10) This article is the sole property of BnB Alternative Septic Solutions, LLC and does not necessarily reflect NORWECO’s position. We feel that our evaluation is technically correct and we welcome constructive comments.

At BnB Alternative Septic Solutions, LLC our registered professional CIVIL Engineers prefer simple NORWECO grinder pump configuration(s) or the robust BK-2000 filtration system followed by a standard NORWECO pump unit. Bio-MICROBICS advocates their BioSTEP® product as superior to filtration systems. We strongly feel that for flows up to 2000 GPD, a BK-2000 system provides robust filtration and is a simpler approach when compared to the BioSTEP® system. We also feel that adding grinder pump units to a standard septic tank outlet is also a “more simple design.”

Either a NORWECO pump vault or a simple grinder pump installation in the septic tank fluids compartment or a BK-2000 filtration unit paired with a standard lift pump unit will give comparable performance and possibly increased reliability. We have seen very few problems with particle clogging.

We recommend adding NORWECO Bio-Gem organic digester or Bio-PERC to the wastewater up-stream to promote solids breakdown to any configuration, including the BioSTEP®. A typical NORWECO pump package would be as noted below:

Typical NORWECO Pump Package

(There are multiple configurations available)

Also, a good option which is robust and similar to the Biomicrobic’s approach is to add a BK 2000 filtration unit to the septic tank outlet, then feed the filtered outlet to the above pump unit. In this case a single liquid pump is adequate since solids are removed and TSS is lowered to under 10 mg/L.

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