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International Research Journal of Plant Science

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2021 Conference Announcement - International Research Journal of Plant Science ( 2024) Volume 9, Issue 7

Enumeration of algal species creating problems in water reservoirs, water supplies and the possible solutions

Rakesh Kumar*
Department of Botany, Faculty of Life Sciences, Wazir Ram Singh Govt. College Dehri, District Kangra (H. P.) INDIA- 176022, India
*Corresponding Author:
Rakesh Kumar, Department of Botany, Faculty of Life Sciences, Wazir Ram Singh Govt. College Dehri, India, Email:

Received: 26-Sep-2022, Manuscript No. jbbs-23-87910; Editor assigned: 28-Sep-2022, Pre QC No. P-87910; Reviewed: 12-Oct-2022, QC No. Q-87910; Revised: 18-Oct-2022, Manuscript No. R-87910; Published: 26-Oct-2022, DOI: http:/




Algae, Water Supplies, Eutrophication, Algal Bloom, Cyanotoxins.


Algae can inhabit freshwater or marine water. Water bodies in different parts of the world vary from oligotrophic (poor in nutrients) to eutrophic (rich in nutrients) due to altered pattern of precipitation (Sinha et al., 2017; Gilbert, 2020) and as such the number of algal species varies in different water bodies. Algal blooms are growing at faster rate due to suitable warming conditions (Gobler et al., 2017). Algal blooms can cause many physical problems e.g. clogging screen or can bring change in the taste and odour of water used for drinking (Walker, 2017, Kalinichenko et al., 2018), decline the oxygen level (Breitburg et al., 2018). A number of algal species are responsible for excessive accumulation of foams, scums and discoloration of the water. Polluted water reduces the water quality and thus restricts the use of water bodies for many purposes (Sen et al., 2013). Some algal forms create trouble for the water system used by animals and humans and produce certain toxins that can have ill health effects (Brooks et al. 2016, Mchau et al., 2019, Kumar, 2021).


An analysis of various troubles creating algae in the municipal water supplies from the literature was carried out and an account of different algal species belonging to different algal groups or classes along with possible remedial measures as a solution of this problem was included in the results.


Common algae in water supplies belong to the following groups:

1. Cyanophyceae (Blue green algae): Anabaena, Aulosira, Calothrix, Chroococcus, Coelosphaerium, Cylindrospermum, Dichothrix, Lyngbya, Merismopedia, Microcystis, Nostoc, Oscillatoria, Phormidium, Scytonema, Spirulina.

2. Chlorophyceae (Green Algae): Actinastrum, Ankistrodesmum, Bulbochaete, Carteria, Chara, Chlamydomonas, Chlorella, Cladophora, Coelastrum, Cosmorium, Desmidium, Elakatothrix, Gloeotaenium, Gonivm, Kirchneriella, Lagerheimla, Micractinium, Micrasterias, Microspora, Movgestia, Netrium, Nitella, Oedogonium, Oocystis, Pandorina, Pediastrum, Pithophora, Platydorina, Quadrigula, Rhizoclonium, Scenedesmus, Selanastrum, Sphaerocystis, Spirogyra, Stavrastrum, Stigeoclonium, Tetraedrun, Volvox, Xanthidium, Zygnema.

3. Bacillariophyceae (Diatoms): Achnanthes, Amphora, Asterionella, cocconeis, Cyclotella, Cymbella, Gomphonema, Gyrosigma, Melosira, Navicula, Pinnularia, Rhizosolenia, Surirella.

4. Pyrrophyceae: Ceratium.

5. Chrysophyceae: Dinobryon

6. Euglenophyceae: Euglena, Phacus, Trachelomonas.

The growth of above algae in water reservoirs and water supplies creates the following problems:

A) Loss of Recreational and Fishing Value of water Bodies:

Excessive growth of Microcystis, Spirogyra, Cladophora and Pithophora results in the loss of recreational and fishing values of pools, ponds and lakes.

B) Imparting Objectionable Odours:

Certain algae impart objectionable or foul adours to potable water either due to this metabolic product or by decomposition. Algae may impart following types odour

1. Odour resembling ripe cucumber or musk melon by Asterionella, Tabellaria (Both Diatoms) and Synura (Chrysophyceae).

2. Grassy odour by Cylindrospermum, Gomphosphaeria, Rivularia.

3. Fishy and Septic odour by Chara, Zeylanica.

4. Strong fishy odour Dinobryon,Uroglenopsis,Peridinium, Ceratium, Chlamydomonas, Pondorina, Volvox.

5. Septic odour by Cladophora, Hydrodictyon, Nitella, Staurastru.

Getting rid of objectionable odours due to algae is a very costly affair.

C) Imparting Objectionable Tastes:

Objectionable tastes imparted by algae are:

1. Sweet taste by Cryptomonas, Gomphosphaeria, Euglena;

2. Bitter taste by Synura, Ceratium, Nitella;

3. Vegetable to oily taste by Stephanodiscus.

D) Imparting Colour to the Water:

Where the water sources are not covered or where the treatment of raw water is not efficient or where filtration is not good and unicellular algae pass through the filters, the following algae add colour to the finished water:

1. Cyanophyceae e.g. Miscrocystis Oscillatoria

2. Chlorophyceae e.g. Chlamydomonas Chlorella Cosmarium Elakatothrix

3. Euglenophyceae e.g. Euglena

4. Pyrophyceae e.g. Ceratium

These algae form coloured marginal rings in the water kept in a vessel, pot or bucket, etc. It may however, be added that the colours are not always due to algae, but they may be due to other substances also.

E) Clogging of Water Filters:

Particulate materials and marine algae are present in surface waters and therefore coagulation and sedimentation are carried out prior to passing the water through the filters, this process removes 95% of algae from water. To remove the rest of the algae the water is passed through filters for 30 to 100 hours.

Two types of filters are utilized. There are:

1. Slow Sand Filters: Chlamydomonas, euglena, Navicula, Nitzschia, Phacus and Trichomanes can pass through there filters.

2. Rapid Sand Filters: Synedra, Oscillatoria can pass through rapid sand filters.

The water which pass through a slow sand filters is relatively free from bacteria, algae and other organisms as well as dead organic matter. Algae in such cases form a loose, slimy layer over the surface of the sand and act not only as a filter, but provide O2 to the aerobic, saprophytic bacteria, fungi and protozoan, which are present in filters. In the absence of algae, filters will be clearer to give us clean water. Also, when the diatoms die, their cell walls which are composed of silica remain permanently there and thereby close the pores in the filters.

Clogging of these filters may be caused by:

1. Diatoms, which are ubiquitous and pose serious problems are: Asterionella, Cyclotella, Cymbella, Diatoma, Fragilloria, Navicula, Synedra, Tabellaria, Melosina.

2. Cyanophyceae e.g. Anabaena, Chrococcus, Oscillatoria, Phormidium, Rivularia.

3. Chlorophyceae e.g. Chlamydomonas, Chlorella, Cladophora, Closterium, Cosmarium, Dichotomosiphon, Dictyospherium, Hydrodictyon, Mougeotia, Palmella, Ulthrix, Zygnema.

4. Euglenophyceae e.g. Euglena, Trachelomonas

5. Other Algae Chrysophyceae: Dinobryon, Peridinium, Tribonema, Stephanodiscus.

As the number of microorganisms increases, the length of filter run decreases (Palmer, 1962) and clogged filter have to be washed back every now and then, resulting in the dislocation of water works. Some algae can pass even through the filters and if they pass in greater numbers they cause turbidity.


Algae provide not only O2, but also acts as a food for the heterotrophic organisms line protozoan, crustaceans, etc. which live in the pipes. In the absence of algae, these organisms would die and the pipes would be cleaner and cleaner. Various algal members grow in polluted aquatic system (Kumar 2016). When the algae grow in large numbers, they result in an increase in the sediments in water reservoirs after their death. In the world, many freshwater and coastal marine ecosystems are getting impaired due to eutrophication which can be managed (Chislock et al., 2013, Glibert, 2020). Water is drawn from different depths, thereby leaving the surface population of algae. Water is chlorinated not only to kill algal growths but also other micro organisms. However, a few algae are resistant to chlorination. Whenever the concentration of planktonic algae approaches a count of 500-60/ml, algicides are applied. Approximately 1ppm copper sulphate is used in water reservoirs for algal treatments. High doses of CP2 and CuSO4 are avoided as they are fatal. Undesirable tastes of algae can be eliminated by treating the water with activated carbon before it is led to filtration. Aluminium hydroxide has been used as a substitute of copper sulphate with success.


It can be concluded from the present study that algal members commonly belonging to Chlorophyceae, Cyanophyceae, Bacillariophyceae, Euglenophyceae, Chrysophyceae and Pyrrophyceae have been reported from the water supplies. Environmental factors like light intensity and temperature leading to more accumulation of algal biomass. This is responsible for change in pH, objectionable odour and taste of water, change of water colour, clogging of filters and loss of fishing and recreational values of water bodies. Water chlorination, use of algicides and activated carbon treatment of water may prove to be a solution of this problem.


The author is thankful to the Principal and the staff of Wazir Ram Singh Govt. College Dehri, District Kangra (Himachal Pradesh), India for constant support and encouragement during the study.

Conflict of Interest: Nil

Financial support: Nil

Ethics statement: N.A.


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Citation: Imbalzano, Marco. �??Making Use of Machine Learning Algorithms for Multimodal Equipment to Assist in COVID-19's Assessment.�?� J Bioengineer & Biomedical Sci 12 (2022): 325.

Copyright: © 2022 Imbalzano M. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.