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RE: Algae and WSP

Sabir — Thu, 24 May 2007 07:21:49 GMT

Algae are very common organism; they may be the first occupants of your pond. Maintaining a healthy balance of aquatic plants is critical to a pond's ecosystem. Treatment of the sewage is accomplished by bacteria and algae working together to break down the organic waste. The by-product of this mutual effort is oxygen which is utilized by the bacteria to repeat the cycle of breaking down the sewage.

Pond colour is usually indicator of algal growth. A pond will have a green color when a flourishing algae population has been established, more over with higher algal growth COD may increase. Thus when an algal population at certain level is required especially in aerobic systems its overgrowth can be controlled with chemical, mechanical, physical or biological means. Some time Copper compounds as a broad spectrum algaecides used to control both planktonic and filamentous algae. These are non-selective and will kill algae within 72 hours. However, some algae are resistant and other may return within 10 days. Best control is the expert advice for combination of mechanical, chemical and physical control for the particular system. In my opinion direct biological control for algal growth is most difficult to establish, however most chemical used to reduce algae are indirectly controlling biological population.

Before use of chemicals one should keep in mind that it is illegal to apply products to ponds that are not registered for use in aquatic environments (check your area legislation). Non-registered chemicals may pose severe human health risks, contaminate groundwater or kill non-target wildlife.

Following link may help.

http://www.irc.nl/content/download/13614/186208/file/WSPs.pdf

RE: Algae and WSP

Rotifer — Wed, 23 May 2007 13:45:00 GMT

Wade...........is it true your office has a window over looking the Calif. beach? No wonder you left Pa.

RE: Algae and WSP

Wade S — Tue, 22 May 2007 17:57:00 GMT

I see USA Bluebook has an ultrasonic algae control device for ponds. Looks interesting, but I'd ask what their return policy is before buying. The smallest one is about $1,000

RE: Algae and WSP

Al Temple — Mon, 08 May 2006 09:54:06 GMT

We have dealt with algae control and have been very effective in controlling it. Al Temple, LAS International, 701-222-8331.

Algae and WSP

WW_KS — Fri, 21 Apr 2006 01:21:43 GMT

Hi all,

Would like to hear your thoughts on algae control on WSP (waste stabilisation ponds).

I would like to hear your experiences on this topic, particularly:

1. What were used as an indicator for the algal content? (e.g. color etc)

2. What have been used as the control mechanisms to reduce/control the algae growth? (post-pond DAF treatment, microscreen etc or additional surface aeration?)

Would be glad to hear about your thoughts