Anaerobic Pond in Wastewater Treatment Essay

Ambient temperatures in hot-climate countries are conducive to these anaerobic reactions and expected BOD5 removals for different retention times in treating sewage have been given by Mara (1976) as shown in Table 2. More recently, Gambrill et al. (1986) have suggested conservative removals of BOD5 in anaerobic ponds as 40% below 10°C, at a design loading of 100 g/m3d, and 60% above 20°C, at a design loading of 300 g/m3d, with linear interpolation for operating temperature between 10 and 20°C.

Higher removal rates are possible with industrial wastes, particularly those containing significant quantities of organic settleable solids.

Don't use plagiarized sources. Get Your Custom Essay on
Anaerobic Pond in Wastewater Treatment Essay
From as low as $9/Page
Order Essay

Of course, other environmental conditions in the ponds, particularly pH, must be suitable for the anaerobic microorganisms bringing about the breakdown of BOD. Table 2. BOD removals in Anaerobic Ponds loaded at 250 g (Mara 1976) BOD5/m3d. Retention Time (days)| BOD5 removal %| 1| 50| 2. 5| 60| 5| 70| Anaerobic ponds are normally designed on the basis of a temperature dependent empirical value for the permissible organic loading rate.

Land requirements will be lowest if the maximum possible BOD loading can be applied.

The upper limit of the volumetric BOD loading is determined by odor emissions and minimum pH threshold value at which the anaerobic decomposition processes cease to work. The maximum BOD loading rate acceptable to avoid odor nuisance was discussed earlier in section 3. 1. However, the effect of pH must be taken into consideration. Concentrations of H2S, which is the sulphur form responsible for odors, increases sharply as the pH drops below 7. , phenomenon which may occur if an anaerobic pond is heavily loaded or overloaded (based on a BOD loading rate criterion). Sulphide may also impede methane production in anaerobic ponds if occurring at excess concentrations. The presence of heavy metals will lead to insolubilisation of sulphides (e. g. iron sulphides). Since methanogenesis is the rate-limiting factor in anaerobic metabolism, products from the preceding acidogenesis reaction may accumulate and lead to a pH decrease.

How to place an order?

Take a few steps to place an order on our site:

  • Fill out the form and state the deadline.
  • Calculate the price of your order and pay for it with your credit card.
  • When the order is placed, we select a suitable writer to complete it based on your requirements.
  • Stay in contact with the writer and discuss vital details of research.
  • Download a preview of the research paper. Satisfied with the outcome? Press “Approve.”

Feel secure when using our service

It's important for every customer to feel safe. Thus, at The Homework Writings, we take care of your security.

Financial security You can safely pay for your order using secure payment systems.
Personal security Any personal information about our customers is private. No other person can get access to it.
Academic security To deliver no-plagiarism samples, we use a specially-designed software to check every finished paper.
Web security This website is protected from illegal breaks. We constantly update our privacy management.

Get assistance with placing your order. Clarify any questions about our services. Contact our support team. They are available 24\7.

Still thinking about where to hire experienced authors and how to boost your grades? Place your order on our website and get help with any paper you need. We’ll meet your expectations.

Order now Get a quote