Various Types Of Biogas Plants

Classification of biogas plants depends upon the plants design and mode of working.

 Classification of biogas plants depends upon the plants design and mode of working. One common way to classify them is

1. Movable type drum plant
2. Continuous type plant
3. Batch type plant

BATCH TYPE BIOGAS PLANT

Batch type biogas plants are appropriate where daily supplies of raw waste materials are difficult to be obtained. A batch loaded digester is filled to capacity sealed and given sufficient retention time in the digester. After completion of the digestion, the residue is emptied and filled again. Gas production is uneven because bacterial digestion starts slowly, peaks and then tapers off with growing consumption of volatile solids. This difficulty can overcome by having minimum to digester so that at least one is always in operation. This problem can also minimize by connecting batch loaded digester in series and fed at different times so that adequate biogas is available for daily use. The salient features of batch-fed type biogas plants are:

• Gas production in batch type is uneven.
• Batch type plants may have several digesters for continuous supply of gas.
• Several digesters occupy more space.
• This type of plants require large volume of digester, therefore, initial cost becomes high.
• This plant needs addition of fermented slurry to start the digestion process.

CONTINUOUS TYPE BIOGASS PLANT

In continuous type biogas plant, the supply of the gas is continuous and the digester is fed with biomass regularly. Continuous biogas plants may be single stage, double stage or multiple stages. Digestion of waste materials in a single chamber or digester is called single stage process, in two chambers or digester is called multi stage process. In double stage process, acidogenic and methanogenic stage are physically separated into two chambers. Thus, the first stage of acid production is carried out in a separate chamber and only diluted acids are fed into the second chamber where biomethanation takes place. In single stage, acidogenic and methanogenic stage are carried out in the same chamber without barrier. These plants are economic, simple and easy to operate. These plants are generally for small and medium size biogas plants. However, the two stage biogas plants are costlier, difficult in operation and maintenance but they produce more gas. 

These plants are preferred for larger biogas plant system. The important features of continuous type biogas plants are:

• Gas production is continuous.
• Retention period is less
• Fewer problems as compared to batch type
• Small digestion chambers are required

MOVABLE DRUM TYPE PLANTS

This also known as floating dome type biogas plant. The conventional movable drum type comprises a masonry digester with an inlet on one side for feeding slurry and an outlet on the other side for removing digested slurry. The gas collects in a steel gasholder which is inverted over the slurry and moves up and down depending upon accumulation and discharge of gas guided by a central guide pipe. This movable gas holder is made of steel. The gas holder is painted by anticorrosive painting at least once in year. This plant helps in consistent pressure which can be adjusted by regulating weight. The main drawback of this is that metal cost is large and maintenance cost is also high. To tackle this problem the scientists have created high density polyethylene.

Advantages:

• Constant gas pressure
• No problem of gas leakage
• Higher gas production
• Scum problem is less

5 Signs To Identify A Dying Plant

Plants can fall ill just like human beings. If their illness is not diagnosed and treated on time, they start dying. But, a plant does not have pulse or breathing that you can check as the vital signs of living. So it is a tough call.

 Most of us who are amateur gardeners are not too good at reading the signs given by a sick plant. To save a plant from dying, you need to identify the signs of illness. There may be many different types of illnesses that plague the plants. But, the basic fact is that there are always symptoms that you can look for.

Here are some of symptoms by which you can identify a dying plant.

Signs To Identify A Dying Plant:

1. Wilting Leaves: There are 2 types of wilting in plants. Usually, the old leaves wilt and new ones grow to replace them. This is a natural process of renewal. However, if you see that the young leaves of your plant are wilting, then your plant might be dying.

2. Yellowing Leaves: Some leaves of the plant do yellow with age. But, leaves turning yellow in a short span of time could only suggest a severe sunburn. May be your plant is getting too much direct sunlight.

3. Shedding Of Leaves: Shedding is a normal way of getting rid of dead leaves. Usually plants shed leaves during Autumn. That is why it is also called the season of Fall. But, if your plant is shedding off season or shedding green leaves, then there is something wrong.

4. A Spot Of Rot: You have see if any of the leaves or parts of the shoot are rotting. Usually, molts and damp conditions make a plant rot. You can save a plant from dying as long as its root do not start rotting. If the roots are rotten, the plant will eventually die out.

5. Fruitful Plant: There are certain non-perennial plants that start dying after producing fruits. First, the flower appears and then the fruit. After this, the plant weakens and dies. The banana plant is an example. The only way to save a plant of this kind is to not allow it produce fruits. Watch out for the fruit bud and prune it every time it appears.

Do you have any other expert gardening tips to identify a sick plant?

Surprising Health Benefits Of Cinnamon

Who doesn’t love a sprinkling of cinnamon on fresh apple pie or atop a chai latte? It’s just one of those spices that tastes fantastic. But taste is not the only reason to love cinnamon.

Here are 10 health reasons (plus an extra reason) to love this super spice:

1. Numerous studies show that cinnamon regulates blood sugar, making it a great choice for diabetics and hypoglycemics alike. That’s also great news for anyone who wants stable energy levels and moods.

2. It reduces LDL cholesterol levels. LDL is also known as the harmful cholesterol. Reducing it may help reduce the risk of cardiovascular disease.

3. It has natural anti-infectious compounds. In studies, cinnamon has been effective against ulcer-causing H. pylori bacteria and other pathogens.

4. It reduces pain linked to arthritis. Cinnamon has been shown in studies at the Department of Internal Medicine, Kangnam Korean Hospital, to reduce cytokines linked to arthritic pain.

Keep reading to learn how cinnamon may help with cancer, menstrual pain, infertility, and more

5. Research at the University of Texas, published in the journal Nutrition and Cancer, shows that cinnamon may reduce the proliferation of cancer cells, holding promise for cancer prevention and sufferers of the disease.

6. It is a natural food preservative.

7. It contains fiber, calcium, iron, and manganese—albeit small amounts to the typical dose of ground cinnamon.

8. It’s been proven effective for menstrual pain and 

9. infertility. Cinnamon contains a natural chemical called cinnamaldehyde, which studies show increases the hormone progesterone and decreases testosterone production in women, helping to balance hormones.

Keep reading to learn how cinnamon holds promise for Azheimer’s, Parkinson’s, MS, and more

10. Cinnamon holds promise for various neurodegenerative diseases, including: Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, brain tumor, and meningitis, according to research at the Cytokine Research Laboratory, Department of Experimental Therapeutics, The University of Texas. Their research shows that cinnamon reduces chronic inflammation linked with these neurological disorders.

11. Not a health benefit, but a great reason to love cinnamon, it’s versatile. It works with sweet and savory dishes alike. Consider that many curries and savory Moroccan dishes include cinnamon. It’s not just for apples anymore

Perfect Companions: Which Plants Grow Well With Tomatoes?

Companion planting is the planting of different crops in proximity (in gardening and agriculture), on the theory that they assist each other in nutrient uptake, pest control, pollination, and other factors necessary to increasing crop productivity.

Companion planting is used by farmers and gardeners in both industrialized and developing countries for many reasons. Many of the modern principles of companion planting were present many centuries ago in cottage gardens in England and home gardens in Asia.

Here is the list of good and bad companion crops for tomatoes

Carrots:

Carrots work well with tomatoes because they share space well. The carrots can be planted when the tomatoes are still quite small, and can be happily growing and ready to harvest by the time the tomato plants start to take over the space.

Chives, Onions, and Garlic:

Members of the onion family are beneficial to plant with many types of crops due to the pungent odor they emit. This helps deter many insect pests.

Borage:

Borage helps deter tomato hornworm.

Asparagus:

Asparagus and tomatoes are good neighbors. Asparagus puts on growth very early in the season, and the tomato plants fill in after asparagus has been harvested. Also, tomatoes help repel asparagus beetle.

Marigold:

Marigolds help deter harmful nematodes from attacking tomatoes. The pungent odor can also help confuse other insect pests. To deter nematodes, the best practice is to grow the marigolds, then chop and till them into the soil at the end of the season.

Nasturtium:

Nasturtiums help deter whitefly and aphids.

Basil:

Growing tomatoes and basil together increases the vigor and flavor of both crops.

Spinach, Lettuce, Arugula:

These are also "good neighbor" crops for tomatoes. They stay fairly small, and will grow better in the heat of summer when shaded by the growing tomato plants.

What Not to Plant with Tomatoes:

The following crops should not be planted with tomatoes:

Brassicas: Tomatoes and all members of the brassicas family repel each other and will exhibit poor growth when planted together.

Corn: Tomato fruit worm and corn ear worm are nearly identical, and planting these two crops together increases the possibility that you will attract one (or both) of these pests.

Fennel: Fennel inhibits the growth of tomatoes.

Kohlrabi: Kohlrabi inhibits the growth of tomatoes.

Potatoes: Planting tomatoes and potatoes together makes potatoes more susceptible to potato blight.

Growing Asparagus

Plant once, harvest for years: A well-maintained bed of this sweet, slender veggie will stay productive for up to 15 years, and, with its vibrant, ferny foliage, asparagus makes an excellent ornamental.

Gardeners have been growing asparagus (Asparagus officinalis) for more than 2,000 years, and this sweet, slender veggie’s staying power is no surprise: A well-maintained asparagus bed will start bearing one year after planting and will stay productive for 10 to 15 years.

A hardy perennial adapted in Zones 3 to 8, asparagus grows best in well-drained soil with a near-neutral pH between 6.5 and 7.5. The edible part of the asparagus plant is the young stem shoot, which emerges as soil temperatures rise above 50 degrees Fahrenheit in spring.

Types to Try

Because asparagus stays productive for so long, it’s important to plant the best variety available for your area. In cold climates, ‘Guelph Millennium’ and other varieties that emerge late often escape damage from spring freezes. In warm climates, early, heat-tolerant varieties such as ‘Apollo’ and ‘UC-157’ produce well before the weather turns hot. Gardeners in Zones 4 to 6 have a wider selection of varieties, including ‘Jersey Giant,’ ‘Jersey Knight’ and other hybrids bred in New Jersey for improved disease resistance and better productivity.

When to Plant

Plant asparagus crowns (dormant roots of 1-year-old plants) in spring at about the same time you would plant potatoes, but don’t rush to plant them if your soil is still cold. A few varieties, such as open-pollinated ‘Purple Passion’ and hybrid ‘Sweet Purple,’ can be grown from seed. Start seeds indoors in spring and set out the seedlings when they are 12 to 14 weeks old, just after your last spring frost. Start with asparagus crowns, however, to eliminate the year of tedious weeding that comes with starting from seed.

How to Plant

Choose a site with fertile soil that’s clear of perennial weeds and grasses. A single row of asparagus plants set 15 inches apart will fill in to form a 24- inch-wide bed, or you can grow a double row in a 36-inch-wide bed. Locate asparagus along the back or side of your garden, as 5-foot-tall asparagus fronds will shade any nearby plants. A bed of 25 mature plants will produce about 10 pounds of asparagus per year.

Asparagus craves phosphorus, which is usually abundant in composted manure and in compost made from kitchen waste. Add a 2-inch layer of rich, weed-free compost to your soil before planting. Dig a trench 4 inches deep and 10 inches wide in the amended soil and arrange the crowns in the bottom, about 15 inches apart. Refill the trench without stepping on the bed.

Maintaining Your Bed

Controlling weeds during the first two seasons will require rigorous weeding by hand. Pull out weeds early and often, and mulch with hay, grass clippings or another organic material to suppress weeds and maintain moisture. Weeds will become less of an issue as the plants fill in.

In early winter, after several hard freezes have damaged your asparagus fronds, cut them off and compost them to interrupt the life cycles of insects and diseases. Fertilize the bed with a 1-inch layer of rich, weed-free compost or manure topped with 3 inches of straw, rotted sawdust or another weed-free mulch. Clean spears will push up through the mulch in spring. Fertilize your asparagus again in early summer after you’ve stopped harvesting spears. You can top-dress with a balanced organic fertilizer, or scatter another inch of rich, weed-free compost over the decomposing mulch.

Harvesting and Storage

The exact dates of your spring picking season can vary by two weeks or more because of variations in soil temperature from year to year. Snap off spears longer than 4 inches at the soil line as soon as they appear in spring. As long as a new planting grew vigorously its first season (and your growing season is not extremely short), you can harvest spears for two weeks after your planting is a year old.

The next season, harvest all spears that appear for the first four weeks of active growth. In your third season you can harvest asparagus for six weeks, and by the fourth year the plants will be strong enough to tolerate a full eight-week harvest season.

Promptly refrigerate your harvested asparagus. You can pickle, dry, or blanch and then freeze bumper crops.

Growing Tips and Ideas

Get Psyched for Your Spears. Prepare your bed when you order your asparagus crowns so you can plant them as soon as they arrive.

Choose Male Plants. Most hybrid asparagus varieties are able to produce seven or more spears per mature plant because they are male plants that don’t expend energy producing seeds. However, if you’re growing open-pollinated or hybrid varieties that do include seed-producing female plants, dig out female plants to limit reseeding. Asparagus seedlings are difficult to pull and may become bothersome weeds in some climates.

Tuck Them In. Freezing temperatures ruin asparagus spears, so harvest yours before any harsh spring weather. During the first weeks of the harvest season, covering beds with row cover tunnels held aloft with hoops can help limit damage from the cold.

An Edible Aesthetic. Ferny fronds of asparagus are a beautiful addition to edible landscaping beds, and asparagus stems make great filler material in flower arrangements.

Outsmart Asparagus Beetles

Two species of asparagus beetles damage spears and fronds throughout North America: the common asparagus beetle (black, white and red-orange) and the spotted asparagus beetle (red-orange with black spots), which are both about a third of an inch long.

Asparagus beetles overwinter in plant debris, so removing fronds in winter will reduce their numbers. Lady beetles and several small wasps are major asparagus beetle predators.

Handpick adult asparagus beetles early in the morning when it’s too cool for them to fly. Asparagus beetle eggs look like stubby, brown hairs. Wipe them off of spears with a damp cloth. After they’ve begun feeding on fronds, asparagus beetle larvae (soft, gray, slug-like creatures with black heads) are unable to crawl back up plants if swept off with a broom. Many gardeners allow their poultry to clean up the asparagus bed for three to five days at the end of the harvest season to rid the plot of overwintering adults.

If you have an asparagus beetle problem but don’t have poultry, set aside a section of your asparagus to serve as a spring trap crop. Don’t cut the spears in spring within the plot, but patrol often to collect as many asparagus beetles as you can. In late summer, cut the fronds 2 inches from the ground and compost them. In three weeks or so, you can harvest a fall crop of spears from your trap crop plot.

In the Kitchen

Delicate spears of asparagus are welcome at every meal. For breakfast, asparagus pairs beautifully with bacon, eggs, ham or melon. Layer lightly steamed spears onto lunch sandwiches, or incorporate them into pasta salads, quiches or bread puddings. Asparagus risotto can round out dinner, or you can serve asparagus roasted, braised or grilled as a side dish.

Asparagus cooks quickly. Toss spears with olive oil, salt and pepper, and then grill for just two to three minutes. You can make roasted asparagus by cooking oiled and seasoned spears in an open pan in an oven at 450 degrees Fahrenheit for eight to 10 minutes.

Asparagus is an excellent source of folacin, a B vitamin that helps keep the circulatory system strong, and it’s a good source of potassium and vitamin C. Claims that asparagus fights cancer are based on its high level of glutathione, a potent antioxidant. Light cooking (such as steaming) for eight to 10 minutes increases the bioavailability of asparagus’ healthful compounds.

Fruit And Vegetables 'Give A Healthy Glow'

Even a few weeks of eating fruit and vegetables could improve your skin color, it is claimed.

University of St Andrews researchers monitored diet in 35 people, finding more coloration in those eating more greens.

Other research suggests these changes may make you more attractive.

Other scientists said the study, in the PLoS One journal, might not fully reflect the link between consumption and appearance.

It has been known for some time that certain yellow and red pigments called carotenoids found in many types of fruit and vegetables, can have an effect on skin tone.

However it is not clear exactly how much influence a normal healthy diet can have on this effect.

The St Andrews scientists recruited 35 students, mostly white, who were quizzed on their fruit and vegetable intake over a six week period.

The volunteers were told not to use sun beds, fake tan or make-up.

An instrument was used to analyze their skin tone before, during and after the test period.

The results suggested that changes in fruit and vegetable consumption might be related to changes in skin tone, with more fruit and vegetables contributing to a deepening of natural red and yellow skin coloration.

Earlier research by the team had found links between the perceived attractiveness of faces and even subtle changes in these skin tones.

"It is possible that even smaller dietary changes are able to produce perceptible benefits to skin coloration," they wrote.

However, they did concede that the effects on older people might be different, and that more research into non-white volunteers would be needed.

Food preparation

Dr Glenys Jones, from the Medical Research Council Human Nutrition Research laboratory at Cambridge University, said that another issue was that food preparation techniques made a big difference to how much of the carotenoids were available from food, and the study did not take this into account.

She added: "With the vast majority of the population not consuming the recommended five-a-day of fruits and vegetables, this could be another way of encouraging people through our own innate vanity to increase fruit and vegetable intake.

"After all fruits and vegetables contain a wide range of nutrients that are good for not just for our complexion, but for our overall health."

Dr Catherine Collins, a dietician at St George's Hospital in London, said that although people heavily exposed to sunlight were excluded from the study, all the areas of skin studied were those exposed to daylight, and the effects of this could not be ruled out.

However, she echoed the point that anything which encouraged people to eat more fruit and vegetables was a good thing.

"For the rest of us post-university people, it's another potential reason to carry on eating your greens - and red/orange/yellow veggies as well.

"The grown-up way of serving them cooked, or as part of an overall meal along with other foods, boosts bio-availability of these useful phytochemicals, which may contribute to overall health - as well as beauty!"

Health Benefits Of Kumquats

A small round to oval citrus fruit, the kumquat resembles a tiny orange. The kumquat grows on trees that originated in China. It can be found in California, Florida, the Mediterranean countries, China, Japan, Indochina, Indonesia, Israel, Peru, and Brazil.

Varieties

Kumquat hybrids, when crossed with other citrus fruits, include the limequat, lemonquat, orangequat, and the calamondin (a cross with the mandarin orange).

Buying and storing tips

Kumquats are occasionally sold with a decorative stem and leaves attached. Avoid fruits with damaged skin and those that feel soft.

Availability

The peak season for kumquats is November through February.

Preparation, Uses, and Tips

In this fruit, the rind is edible, tender, and sweet, while the flesh can be dry and very tart, compared with oranges. Kumquats are usually eaten raw, as whole fruit, excluding the seeds. They make a striking garnish, especially when used with the leaves still attached. As with other citrus fruit, kumquats can be candied, marinated, prepared as marmalade, added to fruit salad, poached, or preserved whole.

Nutritional Highlights

• Kumquat (raw), 1 fruit (19g)
• Calories: 12
• Protein: 0.17g
• Carbohydrate: 3.1g
• Total Fat: 0.02g
• Fiber: 1.25g
• *Good source of: Vitamin C (7.1mg)

*Foods that are an “excellent source” of a particular nutrient provide 20% or more of the Recommended Daily Value. Foods that are a “good source” of a particular nutrient provide between 10 and 20% of the Recommended Daily Value.

Health benefits and concerns

Allergies and sensitivities (food and chemical)

A low-allergen diet, also known as an elimination diet, is often recommended to people with suspected food allergies in order to find out if avoiding common allergen foods gives relief from symptoms. This diet eliminates foods and food additives considered to be common allergens, including citrus fruits. Some popular books offer guidance to people who want to attempt this type of diet. Most elimination diets are quite restrictive and increase the likelihood of nutritional deficiencies. A successful elimination diet is usually followed by reintroduction of eliminated foods one at a time, to see which ones are truly allergens for the individual person and therefore need to be eliminated indefinitely. Strict avoidance of allergenic foods for a period of time (usually months or years) sometimes results in the foods no longer causing allergic reactions. Restrictive elimination diets and food reintroduction should be supervised by a qualified healthcare professional.

Hives

Allergy to foods and food additives is a common cause of hives, especially in chronic cases. Citrus fruits are among those foods most commonly reported to trigger hives. Numerous clinical studies demonstrate that diets that are free of foods that commonly trigger allergic reactions typically produce significant reductions in symptoms in 50–75% of people with chronic hives. People with hives should investigate the possibility that food allergies are causing their problem by consulting with a doctor.

Kidney stones

Citric acid is found in citrus fruits and may protect against kidney stone formation. Lemons are the best food source commonly available. One preliminary trial found that drinking 2 liters (approximately 2 quarts) of lemonade per day improved the quality of the urine in ways that are associated with stone prevention. Lemonade was far more effective than orange juice. The lemonade was made by mixing 4 oz lemon juice with enough water to make 2 liters. The smallest amount of sweetener possible should be added to make the taste acceptable. Further study is necessary, however, to determine if lemonade can prevent recurrence of kidney stones.