When I took my first step onto the property ladder last summer, I thought it would also help my ascent of Lansink’s Ladder: without numerous housemates’ dubious waste management practices to worry about, my residual bin seemed set to remain as sparsely populated as my unfurnished new home. However, I hadn’t counted on the arrival of fuzzy feelings of domesticity that led to the acquisition of an equally fuzzy companion. It wasn’t until my kitten was climbing around in my recycling bin that I started to realise just how much waste the little fellow was going to produce.
According to a report commissioned by the Pet Food Manufacturers’ Association, 13 million UK households (45%) keep pets of some kind. Cats and dogs are each kept by 8.5 million households (these numbers are not additive, as some will of course keep both). Can those of us who want both the joys of animal companionship and waste minimisation, find ways to cut down, or better manage, the huge amount of pet waste generated in the UK every year?
I’ve not conducted a personal compositional analysis and won’t guess at percentages, but thanks to the good recycling collection in my area, my residual waste seems composed almost entirely of tightly tied bags of kitty litter. With so many cats and dogs in the UK, pet poop must represent a significant mass of organic matter within the residual waste stream.
Does this waste represented a floater in the residual waste stream by necessity—due to inherently unpleasant and possibly dangerous characteristics of the waste—or is it only there out of convention and squeamishness? I’ve written before about the relationship between waste management and squeamishness, and talking about faeces really brings the point home. There are some undoubtedly nasty pathogens present in pet faeces, notably the parasites Toxocariasis and Toxoplasmosis. But might these be safely killed off by the temperatures reached in anaerobic digestion (AD)? If so, provided any litter and bags were made of organic matter, might pet waste be collected along with food waste?
I began by contacting a local authority waste officer, but was told that no one had asked this question before, and that I might be better off talking to AD plant operators. This I did, but most seemed similarly baffled by my query. However, one mentioned that AD digestate goes through a pasteurisation process, where it is heated to a temperature of 70oC for one hour, in order to make it safe for land application. I also attempted to contact some technical specialists in the field, but to no avail.
There are some theoretical indications that this pasteurisation should be sufficient. Hanna Mizgajska-Wiktor and Shoji Uga’s essay Exposure and Environmental Contamination states, “Anaerobic waste treatment kills Toxocara spp. eggs at temperatures in excess of 45oC”, well below the 70oC mentioned by my operator. The susceptibility of Toxoplasma to heat is less clear, although numerous internet sources suggest this can be killed in meat by cooking at 66oC. So far, then, I haven’t confirmed or falsified my initial inkling, and so the collection of pet waste in the municipal organic stream remains a theoretical possibility. I’d certainly be interested to hear the thoughts of any experts in the Isonomia readership.
Motivated dog owners can already turn their pet’s waste into a resource within their own home. The website London Worms explains how you can turn your dog’s poo into rich and useful vermicompost, although it warns that the results will only be suitable for use on non-edible plants.
Household pet droppings may still be largely fated for disposal, but even when binned this waste is at least moving through proper waste management channels. Unfortunately, not all pet poo is binned, and we have real data measuring public perceptions of the disamenity resulting from dog fouling. For most, the presence of this unwelcome waste in our streets, parks and footpaths is of much higher concern than its diversion from landfill.
A 2011 Defra-funded study on local residents’ willingness-to-pay — via an increase in council tax — for improvements across a range of environmental factors found that dog fouling was the third most important issue out of the presented range (with litter and fly-tipping taking first and second place). Surveys were conducted in inner-city, suburban and rural/semi-rural areas around London, Manchester and Coventry.
In order to move from the current level of dog fouling to the best possible scenario, it was found that inner-city residents would on average be willing to pay £8.87 per month, suburban residents £7.79 per month, and rural residents £2.72. Combining these figures with population statistics to allows us to place a disamenity value on dog fouling. National statistics only allow for an urban / rural split, but based on a 2012 Defra rurality study which found that 18.9% of the population lives in rural areas, we can calculate that across England, the we would collectively be willing to pay is £462m per year to achieve best case scenario improvements in dog fouling.
This somewhat crude calculation gives an indication of the perceived disamenity of dog fouling. Presenting the matter in terms such as these may allow economically minded policy makers a means of engaging with this important street scene issue and evaluating the costs and benefits of interventions.
Food for thought
Let’s wash our hands of poo (with plenty of soap and warm water) and look to the other end of the pet waste problem. According to a report published by WRAP, the UK uses around 75,000 tonnes of primary packaging annually. This holds 1,263,000 tonnes of wet and dry cat and dog food, of which 9,000 uneaten tonnes are thrown away. Although this wasted food constitutes less than 1% of the total sold (if only we were as careful with food for human consumption) the estimated cost to the consumer is still £21m a year.
WRAP examined a number of designs intended to cut to down on the amounts of both pet food and packaging thrown away. A major problem with packaging design is the need to account for portion size, which vary from animal to animal and change depending on age and level of activity. Single serve packaging may actually lead to regular food wastage if the portion provided is too big for a particular pet; indeed, this is a problem I am experiencing with my own cat, whose appetite seems to fluctuate wildly (don’t panic, the vet has given him a clean bill of health). Re-sealable packaging that allows owners to dish out meals in accordance with the changing appetites of their pets is therefore preferable.
The material that packaging is made of is also significant: for example, relatively heavy tins are recyclable, whereas lightweight plasticised plastic foil packets are not. Pet food and its packaging can be pushed up the hierarchy by simply choosing a recyclable and resealable container which will allow them to adequately provide for the appetite of their pet. However, these issues are likely to be given less weight compared with health, convenience and cost in the minds of most householders. The onus has to be on manufacturers to develop packaging which is both low cost and easily recyclable.
Love pets, hate waste?
People love animals, but are rather less keen to engage with pets as an environmental issue. Leaving aside questions of whether it is sustainable for so many of us to have pets at all, there are clearly ways in which we can reduce their impact. The convenience of single serving pouches of pet food seems to win out over more recyclable and waste-avoiding alternatives, although they might be willing to change their choices if presented with a better option.
While worrying about recovery options for cat poo might seem somewhat academic, it may be easier to tackle than dog fouling. It might even help to tackle the common psycho-social root of both issues. Cultural distaste perhaps lies behind the lack of information available on dealing with household pet waste, and the persistence of dog fouling as a street scene issue. Things were very different in Victorian London when “pure finders” earned a living by seeking out doggie do to supply the tanning trade. But for us this kind of waste is a disagreeable fact of life which we deal with as simply and with as little thought as possible. But as a nation of animal lovers, it’s our responsibility to engage with the waste management issues our pets present.
Streetkleen to launch dog waste DNA program PooPrints in UK
2014 GB Eco Entrepreneur of the Year finalist Streetkleen Bio is pleased to announce a partnership with US Biotechnology company BioPet Vet Lab who specialise in canine genetics. This partnership will include the UK release of PooPrints - a program available worldwide that "matches the dog mess" left behind by DNA analysis. BioPet Vet Lab Director Eric Mayer states "In towns and cities across the UK with hundreds (if not thousands) of dogs the only foolproof tool in enforcement of local dog waste policy is through positive identification with DNA." The PooPrints program is used successfully across the US and Canada, having been introduced there in 2010. PooPrints has become recently available in Israel and Singapore and within the next twelve months will be introduced to Germany, Switzerland and The Netherlands.
In the UK, dog fouling remains one of the most emotive and complained about issues, with 1 in 4 people considering it a problem that is on the rise in their area. Not only is it unsightly and unpleasant, but it has been linked to significant health risks especially to the youngest members of our communities. Councils across the UK have highlighted tackling dog fouling as a priority, but despite their best intentions continue to grapple with dog owners who profess to clean up, but obviously don't.
A recent study undertaken by Keep Britain Tidy estimated the cost of cleaning the streets of the UK at £1 billion. The cost of the DNA registration kit is £29.95 with a simple non invasive cheek swab being taken, then sent for analysis at BioPet Vet Labs animal genomics laboratory. Each individual dog is added to the DNA World Pet Registry and the dog owners receive a welcome pack with individual documents. In the event of offending waste being left behind the cost of the DNA analysis to "match the mess" is £69.95 which could be recovered through the revenue raised by issuing a fixed penalty notice, making it very cost-effective for councils to participate. Having the PooPrints program operational has led to a drop of 90% in recorded dog fouling incidents in many locations as dog owners realise they can be held accountable.
The introduction of PooPrints has coincided with the release of new legislation: The Anti-Social Behaviour, Crime and Policing Act 2014. This replaces Dog Control Orders with Public Space Protection Orders. These new powers give communities the opportunity to set conditions to help prevent nuisances such as dog fouling and other anti-social behaviour that can be considered detrimental to the quality of life to those with a locality.
Streetkleen Bio, a North Wales based Enviro-Tech company's Managing Director Gary Downie commented "As a dog owner myself the challenge was how do we combine positive dog ownership with access to open spaces whilst ensuring we have accountability to local dog policy? PooPrints is a cost effective, permanent solution to dog fouling that helps ensure that our open spaces are clean, safe and welcoming for dog owners and non-dog owners alike."