nutrient removal Articles
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Optimization of simultaneous biomass production and nutrient removal by mixotrophic Chlorella sp. using response surface methodology
The bioprospecting of potentially mixotrophic microalgae in a constructed wetland was conducted. A locally isolated microalga, Chlorella sp., was grown to determine the effect of temperature, aeration rate, and cultivation time on simultaneous biomass production and nutrient removal from piggery wastewater using central composite design (CCD). The most important variable for the biomass ...
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A novel growth method for diatom algae in aquaculture waste water for natural food development and nutrient removal
Diatom algae are known to play an important role as primary producers in many diverse ecosystems, including artificial aquaculture ponds where they also aid in maintaining water quality by consuming excess nutrients. But factors influencing their growth are still poorly understood. In the present study the effect of micronutrients, N:P ratio and silica concentration on benthic diatom Synedra ...
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Pretreatment of brewery effluent to cultivate Spirulina sp. for nutrients removal and biomass production
Due to the low concentration of nitrate and high contents of organics, brewery effluent was not suitable for the cultivation of Spirulina sp. This work changed the nutrient profile of brewery effluent effectively by dilution, addition of nitrate, and anaerobic digestion. The result showed that the optimum dilution rate and NaNO3 addition for brewery effluent were 20% and 0.5 g/L, ...
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Using full-scale duckweed ponds as the finish stage for swine waste treatment with a focus on organic matter degradation
The rapid increase in the number of swine has caused pronounced environmental impacts worldwide, especially on water resources. As an aggregate, smallholdings have an important role in South American pork production, contributing to the net diffusion of pollution. Thus, duckweed ponds have been successfully used for swine waste polishing, mainly for nutrient removal. Few studies have been ...
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Enhancing growth of Chlamydomonas reinhardtii and nutrient removal in diluted primary piggery wastewater by elevated CO2 supply
The coupling of primary piggery wastewater as a culture medium with elevated CO2 aeration is thought to be an economically feasible option for the cultivation of microalgae. However, little information is available regarding the photosynthetic characteristics of microalgae and nutrient removal from wastewater at different CO2 concentrations. It was found that elevated CO2 aeration provided ...
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The Effect of Wastewater Irrigation on Perennial Energy Crops
Using treated wastewater to irrigate energy crops is a favourable alternative for traditional irrigation, especially on marginal lands or in seasons when water is scarce. Although irrigating crops with reused wastewater (even when used to irrigate non-food crop) not always have social acceptance, considering the amount of wastewater daily available, and its high nutrient loads, it is a ...
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Combined yeast and microalgal cultivation in a pilot-scale raceway pond for urban wastewater treatment and potential biodiesel production
A mixed culture of oleaginous yeast Lipomyces starkeyi and wastewater native microalgae (mostly Scenedesmus sp. and Chlorella sp.) was performed to enhance lipid and biomass production from urban wastewaters. A 400 L raceway pond, operating outdoors, was designed and used for biomass cultivation. Microalgae and yeast were inoculated into the cultivation pond with a 2:1 inoculum ratio. Their ...
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Organic fertilizer granulating production line
Organic fertilizer granulating production lineOrganic fertilizers can provide nutrition for crops, promote soil microbial reproduction, improve soil structure, and enhance soil fertilizer supply and buffer capacity, which plays an important role in increasing yield. Organic fertilizer production line construction cycle is short, the return on investment is high, the market risk is small, ...
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Algae biomass cultivation in nitrogen rich biogas digestate
Because microalgae are known for quick biomass growth and nutrient uptake, there has been much interest in their use in research on wastewater treatment methods. While many studies have concentrated on the algal treatment of wastewaters with low to medium ammonium concentrations, there are several liquid waste streams with high ammonium concentrations that microalgae could potentially treat. ...
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Understand Crop Nutrients to Optimize Farm Management
Crop Nutrient Uptake and Removal Farming today is an increasingly complex business. However, when you break down the simplest function of agriculture, it’s all about nourishment. With the global population expected to reach nearly 10 billion by mid-century, nourishing your soil to meet this demand is increasingly essential to what you do. How often does crop nutrient uptake and removal ...
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Many Countries Reaching Diminishing Returns in Fertilizer Use
When German chemist Justus von Liebig demonstrated in 1847 that the major nutrients that plants removed from the soil could be applied in mineral form, he set the stage for the development of the fertilizer industry and a huge jump in world food production a century later. Growth in food production during the nineteenth century came primarily from expanding cultivated area. It was not until the ...
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Composting in the Subarctic – Design
Our Ideal Design The Actium Batch Compost Drum has become an essential tool for Fort Albany First Nation’s community garden. This article details why Fort Albany First Nation needed a composter and why the design of the Actium Batch Compost Drum suited our needs. Why was a composter needed in a remote subarctic community? Fort Albany First Nation (also known as Peetabeck) is a remote and ...
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Growth and yield response of rice varieties to foliar application of Boron | JBES 2020 @environmentalxpart
Abstract A field experiment was conducted during the Kharif season of 2018-19 at Rice Research Station Bahawalnagar on the calcareous sandy loam soil to assess the effect of foliar application of boron on growth & yield components of rice varieties (Kissan & Punjab Basmati 2016).The foliar application of boron aqueous solution was used as treatments comprised of control, 0.5kg/ha, ...
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Polishing of municipal secondary effluent using native microalgae consortia
This work evaluates the use of native microalgae consortia for a dual role: polishing treatment of municipal wastewater effluents and microalgae biomass feedstock potential for biodiesel or biofertilizer production. An initial screening was undertaken to test N and P removal from secondary effluents and biomass production by 12 consortia. A subsequent treatment was performed by selected ...
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Nitrogen fertilization effect on phosphorus remediation potential of three perennial warm-season forages
Warm-season C4 grasses are capable of removing excess soil nutrients because of their high yield potential and nutrient uptake efficiency. Bahiagrass (Paspalum notatum Flügge), limpograss [Hemarthria altissima (Poir.) Stapf & Hubb], and stargrass (Cynodon nlemfuensis Vanderyst), three commonly used pasture grasses in South-Central Florida, were grown to examine the effect of increasing N ...
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Fertilization and blending alternatives for irrigation with desalinated water
Received for publication April 29, 2008. In arid-zone agriculture where available irrigation water is saline, desalination is becoming an attractive method for increasing yields and reducing negative environmental consequences. However, irrigation with desalinated water can be problematic if essential nutrients, including Ca, Mg, and S, removed during reverse osmosis, are not reintroduced. We ...
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Healthy soil key to readying your fields for the coming season
The more you know about your soil, the better enabled you will be to make fertilizer decisions that work on every area of your farm While harvest brings the 2023 growing season to a close, preparation for next year is already underway. Pat Kunz has signed up to have his soil tested across all his fields in anticipation of making informed fertilizer purchases for the upcoming spring. He says ...
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Rethinking food production for a world of eight billion
The World Food Programme and the Chinese government jointlyannounced that food aid shipments to China would stop at the end of theyear. For a country where a generation ago hundreds of millions of peoplewere chronically hungry, this was a landmark achievement. Not only hasChina ended its dependence on food aid, but almost overnight it has becomethe world’s third largest food aid donor. The key ...
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