There are two types of plastic: thermoset and thermoplastic. Thermosets burn, thermoplastics melt and can be reformed. Usually, fillers, colorants, and modifiers are added to a base resin to adjust it’s properties to serve a certain purpose. Glass fiber is added to improve strength, lubricant is added as a mold release, Carbon is added to make the part black, etc. These additives can change the melting temperature and even the viscosity of the melt of the base resin. If you add enough stuff, it can change the properties so significantly that it can be difficult to get the melt to mix with the same resin that has no (or different additives). You should be able to overcome this with the sufficient application of heat and stirring. However, there will be no way to control the distribution of any additives that were in the original piece of plastic. This means that the material properties of the plastic that you have melted and mixed will be unpredictable at best. This is why recycled plastics are often used for products which have few requirements, or are limited to 10-20% of the make-up of the new product. If you can ensure that all of the plastic that you have is of the exact same grade (same resin and same addtives), that is helpful. However even distribution of the additives in the new "recycled" pellets still cannot be gauranteed. An additional challenge is that not every manufacturer stamps the type of material used on their product. It can be difficult to determine what exactly a plastic is, let alone what is in it. PP and LDPE are very similar, translucent and flexible semi-crystalline plastics. PC and PMMA are very similar, transparent and rigid amorphous plastics. Then you have copolymers like PC/ABS, which is quite similar in appearance to homogenous ABS. If they are not marked, you may be able to tell the difference through the use of Differential Scanning Calorimetry or Dynamic Mechanical Analysis, but only if they can be compared to a "master sample" of a pure resin. Also, that’d be quite time consuming. Therefore, plastic recycling is most easily accomplished with pure thermoplastic resins (usually marked with a recycling number).

I am happy to tell you that the answer is yes! I learnt this firsthand because I was involved in collecting plastic film waste and selling to recycling factories. I was also able to teach a class on local recycling at a seminar. Bear in mind that recycling plastics is a volume dependent business.Given the amount you have mentioned, you may want to operate in any of the niches in the local recycling value chain. You may want to purchase an extruder and moulds (A used/locally fabricated extruder should be under NGN1M)from which you can make HDP (High Density Polyethylene) products such as toys, water bottles, kettles,buckets etc.There is also a niche for custom order plastic products for which you will require special/modified moulds. You may also decide to be creative and make new products. You can buy the raw material as crushed/shredded HDP from sellers or you can buy/collect scrap HDP (e.g old jerry cans, plastic chairs etc) and crush them yourself in a jaw crusher which you can buy from NGN150K(these are prices from about 6 years ago.) Cons: High electric power consumption, highly dependent on power availability. Alternatively, you may decide to buy dirty plastic bags(LDPE & HDPE) and sort, wash, cut and dry them. The processes here can be done entirely by hand. It provides a simple but labour intensive and inexpensive entry into recycling business-which is adopted by a number of people without good capital. Sorting will almost always be manual and should start from the waste collection stage. The other tasks of washing and cutting can be done simultaneously by a machine that costs about NGN300k but requires a lot of water. Sun drying is a practical approach, but you can also buy a centrifugal dryer.Pros: Lower starting capital, Simple model Cons: Risk of very dirty or damaged raw material,high water requirement,Power requirement if mechanized, high labour/time requirement if manual . OR you can buy/collect scrap HDP (e.g old jerry cans, plastic chairsetc)wash and crush them yourself in a jaw crusher which you can buy from NGN150K(these are prices from about 6 years ago.) Cons: High electric power consumption, highly dependent on power availability.