Waste Management - BYOBIN


  • Let us consider bulk generators such as apartments as an example to understand this technology for centralized waste management.
  • Each Pelgreen Byobin has a volume of around 700 L. This can accommodate 15-20 Kg waste per day. That is the quantity of wet waste generated by 30-40 apartments. (for Apartment complexes with less than 20 apartments smaller bins of 350L is applicable).
  • Since the bins work in pair, in effect one bin will cater to 15-20 apartments
  • The bins are operated in pair. First month one set of bins will be used 3-4 inches (15Kg) of wet waste is sandwiched between one inch layer of Pelgreen Composorb (inoculum powder) till the bins are filled up.
  • The bins are kept for composting while the second sets of bins are used up. Compost can be retrieved little by little from the top from the 1st set of bins after 15 -20 days after the last addition to the bins.
  • The bins are kept for composting while the second sets of bins are used up. Compost can be retrieved little by little from the top from the 1st set of bins after 15 -20 days after the last addition to the bins.

Dear Users of the PELGREEN BYOBIN-COMPOSORB TECHNOLOGY, We have noticed, during routine customer support visit at Byobin-Composorb implementation sites that some discrepancies and confusion prevail in the use of Pelrich Byobin-Composorb usage. Please find below the procedure for your kind information. Kindly read the instructions carefully and do Pelrich Byobin-composorb composting systematically to avoid difficulties. Also please keep in mind composting under urban conditions are challenging and need a thorough supervision. Please revert back with any queries you have.

  • The bins always work in pair. The bin requirement will vary from 1 bin/15 flats to 1bin/20 flats depending the density of the waste. Higher the percentage of non-vegetarian waste, lesser bin capacity will be required.
  • Max 15Kg (or 20-25L ) waste only should be put in the byobin in a day. If more waste is added, the compression due to its weight will convert the waste into anaerobic condition and increase the composting time.
  • Wet waste added into the bin has to be uniformly leveled over which composorb has to be added such a way that complete waste is covered by composorb. Exposed waste will emit smell attracting insects that lay eggs which will hatch out and form maggots. Maggots and worms found in the bin are not developed from composorb. They are larvae of various insects hatched out of eggs laid in the byobin on exposed waste.
  • To avoid high amount of maggots formation and to get drier compost, put a layer of dry leaves on the top of wet waste every day over which composorb need to be spread. This will also reduce the consumption of composorb. if maggots are uncontrollable, use of Biorakshak, organic pest repellant can be used.
  • Leachate will be produced in the composting tank which need to be taken out once in 2-3 days. If left in the tank, maggot formation will increase in the leach tank creating inconvenience.
  • Compost produced by Byobin-Composorb method is one of the best in the world. Appearance of compost is not significant. What matters is the C:N (carbon nitrogen ratio) and EC (Electrical conductivity). Compost generated using composorb will have a C:N ratio of 25:1( international standard: not more than 30:1) and EC of 5 micromhos/cm ( international standard: not more than 10 micromhos/cm). Due to the less EC it can be used as a soil less planting media. Due to dynamic continuous composting, the compost continue to degrade enabling continuous addition of compost to the plants.
  • After filling up the bin, keep it undisturbed for 15 days. On the 16th day remove the top dry layer (around 10-12 inches) into a bag where further composting happens. Repeat this every alternate day. Further composting of the wet waste happens in the bag. By the next 10-15 day the whole compost can be transferred into the bags emptying the bin for the next cycle.
  • Strictly no plastic is allowed inside the composting bin as plastic create a inhibition zone around it where microbes will not grow and the wet waste remain uncomposted.
  • It is better to have one person who will be in charge of the Byobin operations.

FAQ’s (selected out of customer queries):

  1. How good is the compost made from the drum?

    The compost generated out of Byobin-composorb method will have the following characteristics which are world class.

    • Electrical conductivity: less than 5 milli mhos/cm, (normal compost will be more than 20 units which creates heat in the vector of the plant)
    • Lignin/polyphenol content: less than 25%. This will be more than 40% in regular compost that creates an acidic environment.
    • C:N (carbon nitrogen ratio) will be 30:1 which complies with international standards.
    • Other unique features:

      i. Compost will double up as soil less planting media

      ii. Compost will keep degrading after parting nutrients to plants enabling continuous addition of compost to plants. Or else now the pile of waste will turn to pile of compost.

  2. Any buyers for the compost and what rate does it sell?

    Sell- ability of compost is limited due to the bad cosmetic appearance of the compost. Farmers are used to uniformly pulverized compost. Further due to the continuous composting there is no shelf life (which is an advantage for internal consumption). Utilization of compost in flats- a carbon fixing proposition: Around 50 nos of 50L pots (new or exisiting) @ 1 pot/ 2 apartments in an apartment complex with 100 flats, will be sufficient to consume the compost they generate when the pots are filled with compost and grown fruit shrubs like lemon, pomegranate, papaya, banana and curry leaves. These pots will keep on accommodating the compost every month.

  3. Does it also compost paper which are used as bin lining?

    Paper will compost only after 3-4 months and will be visible at the end of the month when we take out compost. If used as planting media as described above, it will go inside the pots and there are no issues. However if it is used as manure, on drying, the papers will fly around after drying. Please note lining of bins with paper or plastic is banned as per rules, the rules prescribe transfer of wet waste from bins to bins without liners. Further printing ink is toxic and hence printed paper should not be composted.

  4. What problems apartments which have implemented this system have faced?

    A few issues apartments face are:

    • The bin can accommodate 15Kg waste /day ideally. More waste dumped/day will slow down composting due to reduced air circulation. Due to this, waste generated out of parties/function in apartments, cannot be put in the bins (hence they need more bins).
    • When old, decomposed waste (which the houses sometimes forget/ignore to give to house keeping people) is added to the bin, the maggots would have already formed and during a very humid day may come out through the air pipes. Ideally fresh waste need to be added where the maggots formed will perish inside in early instars (stages) of larval formation due to aggressive microbial presence.
    • In humid climate, leachate drainage from the lower layers (leachate of upper layer drenching down) will not get completed and when the compost is taken out the last layer will be soggy.
  5. Is there any comparison chart of pelrich product with other composting systems in market (in terms of cost, quality,...)?

    Pelrich composorb is the first product in the world that provides the multiple advantages of lingo-cellulosic degradation, absorption of obnoxious gases and compost wet waste in less than 2 months. Further owing to our technology, we produce compost with the lowest electrical conductivity.

  6. Is there anything that cannot be put in the bin?

    All biodegradable matter can be put inside the bin. Coconut shell and tender coconut leftovers will stay back after 30 days and hence better advised not to be added into the bin. if added by mistake, can be removed even after composting. No dry waste is allowed.

  7. How heavy is the bin?

    Around 7Kg.

  8. The leachate collects at the bottom of the bins. The valve below allows this to be drained regularly for odor control? (Since top of bin will be collecting daily organic waste)

    Yes, the valve is for removing the leachate (once in 2 days), not for odour removal but for enabling air passage. Leachate (1L/day/bin) can be immediately administered to the garden and irrigated to avoid any bad smell.

  9. Will it handle non-veg and bone scraps? We have a shredder that we use to homogenize organic waste before we put it into the bin. Can we shred waste before layering into Byobins? Does shredding help or hinder?

    Byobin-composorb can handle non-veg and bone scraps. The bones will not disintegrate completely but the protein part will completely decompose making the bone a stick of calcium phosphate not attractive anymore to the bonetarians. Further it will break down when in contact with plant environment in a few months time. If the compost is used as a soil less planting media, it can be conveniently buried below the soil. Regarding shredder, we have seen in a few apartments that shredding wet waste with dry leaves adds to the quality and speed of composting. Shredder is an advantage. However as an eco-sensitive organization, we recommend carbon neutral protocols and zero consumption of power.

  10. As location options you mention garage, does this mean we can house Byobins indoors? We have a room allocated to waste management and would prefer composting paraphernalia to be inside for aesthetic purposes?

    Yes, it can be used indoors. However the handling of waste will create some spillage and some leachate getting spilled over. Even in minute quantities, in a closed environment, it will give concentrated smell. So we prefer out doors. To make it aesthetically appealing, we can hang pots around it so that it will not even appear to be a composting bin. Further if placed in the middle of the garden, even if some maggots crawl out, it will form pupae on the plant. In concrete environment the larvae may crawl around creating in-convenience.

  11. You say that bins work in pairs. Does this mean from day 1, half of the total bins will be started? Will the day's collection be divided amongst the first half of the total no. of bins or used on alternate days?

    Total waste has to be shared between the first set of bins @ a max of 15Kg/ each bin every day and not alternate days. If we put more than 15KG (4-5 inches) in one bin the weight will create anaerobic condition in between the layers, the microbial colony will find it difficult to reach the inner layer and the leachate formed in the wet waste will not get drained out.

  12. Based on my reading below and online, compost is ready/done about six weeks after a bin is started. Is this correct?

    So after 6 weeks, that compost can be emptied and bin is available to start afresh? Do we need to test the compost in any way before using?: Once the bin is full, after 15 days from the last day of adding waste to the bin, top layers of compost (6 to 12 inches) can be taken into bags,. the top most layer though not fully composted will be dried and degraded (without smell). By taking the top layers we enable rapid drying (due to internal heat) of the lower layers (which are composted). In the next 15 days the compost bin will get emptied (when compost taken once in 3 days) and the compost in the bags will complete the composting cycle (of 30 days)

  13. We may need some convincing that a maximum of 6 bins will support the 90 unit complex at full capacity. Too many bins will be hard to manage.

    The usage depends on the type of waste too. More non-veg will require less space accommodating max of 20 apartments/bin. However more veg will bring down the capacity to 15 apartments/bin. Thus for 90 apartments it will vary from 4-6. We have not encountered yet an apartment complex requiring more than 1bin/15 apartments.

  14. I believe that a minimum quantity of waste should be put into the bin regularly and all the participating families have agreed to this.

    There is no minimum quantity. Even if waste is not put for months in the bin, the byobin will operate as the microbes in the bin will hibernate (sporulate) till fresh waste is added.

  15. In some models if Potatoes or onions are put into the digester they do not get degraded and hence the waste has to be cut into small pieces.

    It is not required to crush waste. Uncrushed waste may appear in the amorphous original shape, as when added into the bin, at the end of composting period in the bin. These materials may not be completely degraded at the end of composting cycle. However they are considered composted as they will continue to degrade without creating any increment in EC (electrical conductivity value), nitrogenous gases and leachate further. Potatoes, onions and similar materials can be added without crushing into the bin. Nevertheless crushing helps in faster degradation and obtaining cosmetically uniform compost. But that is irrelevant when waste management is a priority while it may be of significance in commercial agriculture space where sales of compost is involved.

  16. In your Byobin what will be the maximum quantity of the waste. I think the smaller the better and quicker it will get digested.

    15-20 kg waste can be added to byobin daily depending on the bulk density. In fact it is the volume rather than the weight that matters. 4-5 inches of waste can be added to byobin daily. In Byobin that will amount to 15-20kg. If added beyond this there will be a natural compression of waste due to own weight pulping it, resulting in anaerobic condition. By limiting to 4-5 inch, and giving 24 hrs before next addition, the liquid portion in the waste is allowed to drain, reducing the chances of it getting pulped, enabling further addition of waste next day. Lesser quantity of waste will increase the recurring cost as daily we need to add composorb. Or else waste from two days can be coupled to create 4-5 inch layer in the bin over which a layer of composorb can be added. In that case the overnight waste may create some stench which will be completely nullified by the addition of composorb.

  17. To have pipes with perforated holes centrally connected for aeration inside the Byobin is a good idea. I am sure the pipes are fixed strongly so that they do not fall down when it is tilted to remove the manure at the end of 30 days.

    The pipes are in-fact loosely fixed to provide for a little cluttered job that may come out of the workers. The pipes are to be removed from the tank before taking out the compost. It can/need to be fixed back as stress free as possible for longer life.

  18. The leachate at the bottom will be coming I think through the pipe provided at the bottom. It has to be removed at regular intervals or a small bucket or container has to be kept near the pipe(This is what they do in the models I have seen). This bio liquid is a very good manure and can be applied to plants etc.

    Absolutely right. The leachate (1-2L/day/bin) need to be removed every alternate day. Alternately leachate can also be plumbed into the sewage line leading to STP. The microbial load in the leachate will enhance STP functioning.

  19. Incidentally, how often within the three days the Inoculum has to be applied and how much it would cost per 30 days?

    For every 4-5 inch layer, (15-20Kg) waste 2.5L (~ 1.25Kg) Composorb is required to create a thin uniform layer. Every bin will thus consume 0.75 bag composorb (100L) , @ Rs.12/L, Rs.900/bin/month.

  20. Since many members in the apartments will be putting their waste inside the Byobin as I said earlier it would be better to make one person in-charge of the operations.

    The residents should not be generally allowed to put the waste into the bin. This way there will be no control on the chances of non-biodegradable and toxic waste like glass, paper, metal, plastic, e- waste and sanitary waste reaching byobin. Housekeeping team should go door to door, inspect the biodegradable waste bin, confirm absence of even a toffee wrapper and then take it to the byobin.

  21. In places like Trichy the digestion(because it is a hot place) will be fast. I hope the inoculum will help quick digestion of the waste in a place like Bengaluru where the temperature is lower than in Trichy especially in the winter months. I am very eager to know of the progress of the Byobin on a weekly basis during the first 4-5 weeks.

    Composting naturally produce heat, which in bangalore, due to cooler climate, is easily conducted out. This enables fungus working in 30-35 degree C becoming more virulent. However we have fungal strains in the inoculums that can work at higher temperatures in such an event.